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1

Muon Reconstruction and Identification in CMS  

SciTech Connect (OSTI)

We present the design strategies and status of the CMS muon reconstruction and identification identification software. Muon reconstruction and identification is accomplished through a variety of complementary algorithms. The CMS muon reconstruction software is based on a Kalman filter technique and reconstructs muons in the standalone muon system, using information from all three types of muon detectors, and links the resulting muon tracks with tracks reconstructed in the silicon tracker. In addition, a muon identification algorithm has been developed which tries to identify muons with high efficiency while maintaining a low probability of misidentification. The muon identification algorithm is complementary by design to the muon reconstruction algorithm that starts track reconstruction in the muon detectors. The identification algorithm accepts reconstructed tracks from the inner tracker and attempts to quantify the muon compatibility for each track using associated calorimeter and muon detector hit information. The performance status is based on detailed detector simulations as well as initial studies using cosmic muon data.

Everett, A. [Purdue University, West Lafayette, IN, 47906 (United States)

2010-02-10T23:59:59.000Z

2

B physics expected performances with the Compact Muon Solenoid detector  

SciTech Connect (OSTI)

We present here the future performances of the Compact Muon Solenoid detector for B physics. We show that CMS will contribute significantly to the CP violation parameter sin 2{beta} measurement with a precision of {delta} sin 2{beta}{approx_equal}0.02 (1 year of integrated luminosity). The asymetry in the channel B{sub s}{sup 0}{yields}J/{psi}{phi} will be tested to the 2-5% level. The mixing parameter x{sub s} of B{sub s}{sup 0} oscillations will be measured up to 40. Finaly the rare B decay should be searched down to the SM expectation and in the case of the semileptonic rare decays will provide enough statistics to performed detailed studies.

Charles, Francois [Groupe de Recherche en Physique des Hautes Energies, Universite de Haute Alsace, 61 rue A. Camus, 68093 Mulhouse (France)

1998-10-19T23:59:59.000Z

3

Muon Identification at ATLAS and CMS  

E-Print Network [OSTI]

Muonic final states will provide clean signatures formany physics processes at the LHC. The two LHC experiments ATLAS and CMS will be able to identify muons with a high reconstruction efficiency above 96% and a high transverse momentum resolution better than 2% for transverse momenta below 400 GeV/c and about 10% at 1 TeV/c. The two experiments follow complentary concepts of muon detection. ATLAS has an instrumented air-toroid mangetic system serving as a stand-alone muon spectrometer. CMS relies on high bending power and momentum resolution in the inner detector, and uses an iron yoke to increase its magnetic field. The iron yoke is instrumented with chambers used for muon identification. Therefore, muon momenta can only be reconstructed with high precision by combining inner-detector information with the data from the muon chambers.

Oliver Kortner

2007-07-06T23:59:59.000Z

4

Muons in minimum bias events from the first CMS data  

SciTech Connect (OSTI)

Muon signatures are extremely important in the challenging environment of collisions at the LHC. Understanding the observed muon yield from Standard Model processes is the first task for all analyses involving muons. Basic muon kinematical observables are presented for the first CMS data at {radical}(s) = 7 TeV and compared with Monte Carlo expectations. The muon sample composition is studied by using the MC truth in terms of muons from heavy flavours, muons from light hadron decays and hadron punch-through is studied from MC truth.

Barbone, Lucia [Dipartimento Interateneo di Fisica and INFN Sezione di Bari, via E. Orabona 4, 70126 Bari (Italy)

2010-12-22T23:59:59.000Z

5

Performance of the Gas Gain Monitoring system of the CMS RPC muon detector and effective working point fine tuning  

E-Print Network [OSTI]

The Gas Gain Monitoring (GGM) system of the Resistive Plate Chamber (RPC) muon detector in the Compact Muon Solenoid (CMS) experiment provides fast and accurate determination of the stability in the working point conditions due to gas mixture changes in the closed loop recirculation system. In 2011 the GGM began to operate using a feedback algorithm to control the applied voltage, in order to keep the GGM response insensitive to environmental temperature and atmospheric pressure variations. Recent results are presented on the feedback method used and on alternative algorithms.

S. Colafranceschi; L. Benussi; S. Bianco; L. Passamonti; D. Piccolo; D. Pierluigi; A. Russo; G. Saviano; C. Vendittozzi; M. Abbrescia; A. Aleksandrov; U. Berzano; C. Calabria; C. Carrillo; A. Colaleo; V. Genchev; P. Iaydjiev; M. Kang; K. S. Lee; F. Loddo; S. K. Park; G. Pugliese; M. Maggi; S. Shin; M. Rodozov; M. Shopova; G. Sultanov; P. Verwillingen

2012-09-18T23:59:59.000Z

6

CMS Glossary  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Glossary Glossary CMS Outreach Glossary CMS Filter Farm Glossary CMS Trigger & DAQ Acronyms CMS Workbook Acronyms of High-Energy Physics ATLAS Glossary DZero DAQ Shifters' Glossary Fermilab Accelerator Glossary LHC Naming & Conventions Google / Wikipedia A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Numbered Items Miscellaneous -A- ADC Analog to Digital Converter AFS Andrew File System AJAX Asynchronous JavaScript And XML API Application Program Interface ATM Asynchronous Transfer Mode -B- BER Bit Error Rate BMU Barrel Muon Group BX Beam Crossing -C- CLHEP Class Library for HEP CMKIN CMS Kinematics Package CMF Computer Management Framework CMS Compact Muon Solenoid CMSSW CMS Software CPT Computing, Physics and Trigger/DAQ Project CVS Concurrent Versions System

7

Standard Model Higgs Boson Discovery Potential in the Decay Channel H - > ZZ(*) - > 4 mu with the CMS Detector.  

E-Print Network [OSTI]

??The Compact Muon Solenoid (CMS) is a general purpose detector at the Large Hadron Collider (LHC) currently under construction at CERN with start-up date in… (more)

Drozdetski, Alexei Alexandrovic

2007-01-01T23:59:59.000Z

8

Circularly Inclined Solenoid Channel for 6D Ionization Cooling of Muons  

SciTech Connect (OSTI)

Ionization cooling is essential for realization of Muon Collider, muons beam based neutrino factories and other experiments involving muons. The simplest structure - absorber(s) immersed in alternating solenoidal magnetic field - provides only transverse cooling since the longitudinal motion in the most suitable momentum range (2-300MeV/c) is naturally anti-damped. To overcome this difficulty it is proposed to periodically tilt solenoids so that a rotating transverse magnetic field was created. By choosing the phase advance per period above a multiple of 2{pi} it is possible to ensure that muons with higher momentum make a longer path in the absorber (whether distributed or localized) thus providing longitudinal damping. Basic theory of such channel and results of tracking simulations are presented.

Alexahin, Y.; /Fermilab

2009-05-01T23:59:59.000Z

9

6D mu (+/-) cooling using a solenoid-dipole ring cooler for a muon collider  

SciTech Connect (OSTI)

Six dimensional cooling of large emittance {mu}{sup +} and {mu}{sup -} beams is required in order to obtain the desired luminosity for a muon collider. We propose to use a ring cooler that employs both dipoles and solenoids with the additional requirement that the arcs of the ring be achromatic. We describe the lattice and the beam dynamics of the proposed ring, and demonstrate that the lattice gives substantial cooling in all 6 phase space dimensions.

Garren, A.; Berg, J.; Cline, D.; Ding, X.; Kirk, H.G.

2011-08-01T23:59:59.000Z

10

First operational experience with the CMS Run Control System  

E-Print Network [OSTI]

The Run Control System of the Compact Muon Solenoid (CMS) experiment at CERN's new Large Hadron Collider (LHC) controls the sub-detector and central data acquisition systems and the high-level trigger farm of the experiment. ...

Bauer, Gerry P.

11

Preparations for Measurement of Electroweak Boson Production Cross-Sections using the Electron Decay Modes, with the Compact Muon Solenoid Detector  

E-Print Network [OSTI]

The Compact Muon Solenoid was designed to make discoveries at the TeV scale : to elucidate the nature of electroweak symmetry breaking and to search for physics beyond the Standard Model. For any such discovery to be credible, it must first be demonstrated that the CMS detector is understood. One mechanism to make this demonstration is to measure “standard candle” processes, such as W and Z production. This thesis describes preparations undertaken to make these measurements using the electron decay modes, with an integrated luminosity of 10 inverse picobarns of collision data. The energy resolution of the electromagnetic calorimeter was measured in test beam data. An improved method of deriving the optimised weights necessary for amplitude reconstruction is described. The measurement of electron charge using tracks is impaired by the electron showering in the tracker material. A novel charge measurement technique that is complementary to the existing method was assessed. Missing transverse energy is a pow...

Wardrope, D R

2009-01-01T23:59:59.000Z

12

Efficiency Measurement of Momentum Imbalance Trigger at CMS for Supersymmetry Searches  

E-Print Network [OSTI]

for this analysis was CMS data where a single muon (a type of lepton which is similar to an electron, but more massive) was recorded by the CMS detector system. The CMS detector does not have a bias for detecting a single muon depending on MET, so this dataset... Overview of the Thesis : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 7 II THE LARGE HADRON COLLIDER : : : : : : : : : : : : : : : : : : : : : : : : 9 Compact Muon Solenoid Detector Overview : : : : : : : : : : : : : : : : : : : : 10...

Davis, Christopher J

2013-02-01T23:59:59.000Z

13

U.S. CMS  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Welcome Welcome Discoveries from the Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider (LHC) at CERN in Geneva, Switzerland, promise to revolutionize our understanding of the universe. More than 900 scientists from 48 institutions in the U.S. participate in the U.S. CMS collaboration, supported by the Department of Energy and National Science Foundation. (show more) U.S. CMS View from the CMS collision hall. (Courtesy Michael Hoch, Adventure Art) U.S. CMS consists of more than 400 physicists, 200 graduate students and 200 engineers, technicians and computer scientists, making it the largest national group in the international collaboration. The U.S. collaboration is making significant contributions to nearly every aspect of the detector throughout all phases, including construction, installation and preparation

14

Measurement of the charge ratio of atmospheric muons with the CMS detector  

SciTech Connect (OSTI)

We present a measurement of the ratio of positive to negative muon fluxes from cosmic ray interactions in the atmosphere, using data collected by the CMS detector both at ground level and in the underground experimental cavern at the CERN LHC. Muons were detected in the momentum range from 5 GeV/c to 1 TeV/c. The surface flux ratio is measured to be 1.2766 \\pm 0.0032(stat.) \\pm 0.0032 (syst.), independent of the muon momentum, below 100 GeV/c. This is the most precise measurement to date. At higher momenta the data are consistent with an increase of the charge ratio, in agreement with cosmic ray shower models and compatible with previous measurements by deep-underground experiments.

Khachatryan, Vardan; et al.

2010-08-01T23:59:59.000Z

15

A search for excited electrons with the Compact Muon Solenoid detector  

E-Print Network [OSTI]

There are four experimental caverns along the path of thiswhere the experimental caverns and utilities such asunderground in the CMS cavern. The second is software-base

Sudano, Elizabeth Jane Dusinberre

2012-01-01T23:59:59.000Z

16

Performance of Muon-Based Triggers at the CMS High Level Trigger  

E-Print Network [OSTI]

The trigger systems of the CERN LHC detectors play a crucial role in determining the physics capabilities of the experiments. A reduction of several orders of magnitude of the event rate is needed to reach values compatible with the detector readout, offline storage and analysis capabilities. The CMS experiment has been designed with a two-level trigger system: the Level 1 (L1) Trigger, implemented on custom-designed electronics, and the High Level Trigger (HLT), a streamlined version of the CMS reconstruction and analysis software running on a computer farm. Here we will present the design and performance of the main muon triggers used during the Run I data taking. We will show how these triggers contributed to the 2012 physics results. We will then present the improvements foreseen to meet the challenges of the Run II data taking. We will discuss the improvements being made at L1, and at various stages in the HLT reconstruction, ranging from the local drift tube and cathode strip chamber reconstruction, to L2 muon tracks, to the final L3 muons.

Juliette Alimena

2014-09-17T23:59:59.000Z

17

U.S. CMS - U.S. CMS @ Work - Organized 1994  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Organized Organized US groups interested in participation in the Compact Muon Solenoid (CMS), a collaboration for an experiment at the Large Hadron Collider (LHC) at CERN, met at Fermilab on April 6-7, 1994, with representatives of CMS management. The US groups organized to prepare a Letter of Intent (LOI) to be submitted to the US DOE, and defined a management structure for the US groups within CMS. Thomas Müller, UCLA, was elected chair of the US Institution Board, the governing body of the US CMS Collaboration. The US Institution Board Chair also serves as the US representative to the CMS Management Board. Dan Green, Fermilab, was elected Spokesperson to DOE for the US CMS Collaboration. The US Coordinators for the CMS subsystems in which US groups plan to participate, named at the April 6-7 meeting, are:

18

CMS e-Lab Overview  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

CMS e-Lab Overview     CMS e-Lab Overview &nbsp&nbsp&nbsp With the CMS e-Lab students can join a scientific collaboration in this series of studies of high-energy collisions from the Large Hadron Collider (LHC) at CERN. We are collaborating with the Compact Muon Solenoid (CMS) experiment to produce a student-led, teacher-guided project. At the present, we have test beam, Monte Carlo (simulated) data and run data. We expect more data through 2010 and 2011. By using the web, students are able to analyze and share these data with fellow students and other researchers. Students write a researchable question and analyze data in much the same way as professional scientists. e-Lab tools facilitate collaboration among students as they develop their investigations and report their results.

19

Performance of muon-based triggers at the CMS High Level Trigger  

E-Print Network [OSTI]

The trigger systems of the CERN LHC detectors play a crucial role in determining the physics capabilities of the experiments. A reduction of several orders of magnitude of the event rate is needed to reach values compatible with the detector readout, offline storage and analysis capabilities. The CMS experiment has been designed with a two-level trigger system: the Level 1 (L1) Trigger, implemented on custom-designed electronics, and the High Level Trigger (HLT), a streamlined version of the CMS reconstruction and analysis software running on a computer farm. Here we will present the design and performance of the main muon triggers used during the Run I data taking. We will show how these triggers contributed to the 2012 physics results. We will then present the improvements foreseen to meet the challenges of the Run II data taking. We will discuss the improvements being made at L1, and at various stages in the HLT reconstruction, ranging from the local drift tube and cathode strip chamber reconstruction, to ...

Alimena, Juliette

2014-01-01T23:59:59.000Z

20

Magnetic design constraints of helical solenoids  

E-Print Network [OSTI]

Helical solenoids have been proposed as an option for a Helical Cooling Channel for muons in a proposed Muon Collider. Helical solenoids can provide the required three main field components: solenoidal, helical dipole, and a helical gradient. In general terms, the last two are a function of many geometric parameters: coil aperture, coil radial and longitudinal dimensions, helix period and orbit radius. In this paper, we present design studies of a Helical Solenoid, addressing the geometric tunability limits and auxiliary correction system.

Lopes, M L; Tompkins, J C; Yonehara, K; Flanagan, G; Kahn, S A; Melconian, K

2015-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "muon solenoid cms" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

CMS PAPER CFT-09-005 Measurement of the Muon Stopping Power in Lead  

E-Print Network [OSTI]

is exploited to measure the specific energy loss of muons in the lead tungstate (PbWO4) of the elec with low-momentum muons. The muon critical energy in PbWO4 is measured to be 160+5 -6 ±8 GeV, in agree is the total muon energy, x is the thickness of the traversed material, commonly mea- sured in mass per unit

Roma "La Sapienza", Università di

22

Measuring the Magnetic Flux Density in the CMS Steel Yoke  

E-Print Network [OSTI]

The Compact Muon Solenoid (CMS) is a general purpose detector, designed to run at the highest luminosity at the CERN Large Hadron Collider (LHC). Its distinctive features include a 4 T superconducting solenoid with 6-m-diameter by 12.5-m-length free bore, enclosed inside a 10000-ton return yoke made of construction steel. The return yoke consists of five dodecagonal three-layered barrel wheels and four end-cap disks at each end comprised of steel blocks up to 620 mm thick, which serve as the absorber plates of the muon detection system. Accurate characterization of the magnetic field everywhere in the CMS detector is required. To measure the field in and around the steel, a system of 22 flux-loops and 82 3-D Hall sensors is installed on the return yoke blocks. Fast discharges of the solenoid (190 s time-constant) made during the CMS magnet surface commissioning test at the solenoid central fields of 2.64, 3.16, 3.68 and 4.01 T were used to induce voltages in the flux-loops. The voltages are measured on-line and integrated off-line to obtain the magnetic flux in the steel yoke close to the muon chambers at full excitations of the solenoid. The 3-D Hall sensors installed on the steel-air interfaces give supplementary information on the components of magnetic field and permit to estimate the remanent field in steel to be added to the magnetic flux density obtained by the voltages integration. A TOSCA 3-D model of the CMS magnet is developed to describe the magnetic field everywhere outside the tracking volume measured with the field-mapping machine. The results of the measurements and calculations are presented, compared and discussed.

V. I. Klyukhin; N. Amapane; A. Ball; B. Curé; A. Gaddi; H. Gerwig; A. Hervé; M. Mulders; R. Loveless

2012-12-06T23:59:59.000Z

23

Measuring the Magnetic Flux Density in the CMS Steel Yoke  

E-Print Network [OSTI]

The Compact Muon Solenoid (CMS) is a general purpose detector, designed to run at the highest luminosity at the CERN Large Hadron Collider (LHC). Its distinctive features include a 4 T superconducting solenoid with 6-m-diameter by 12.5-m-length free bore, enclosed inside a 10000-ton return yoke made of construction steel. The return yoke consists of five dodecagonal three-layered barrel wheels and four end-cap disks at each end comprised of steel blocks up to 620 mm thick, which serve as the absorber plates of the muon detection system. Accurate characterization of the magnetic field everywhere in the CMS detector is required. To measure the field in and around the steel, a system of 22 flux-loops and 82 3-D Hall sensors is installed on the return yoke blocks. Fast discharges of the solenoid (190 s time-constant) made during the CMS magnet surface commissioning test at the solenoid central fields of 2.64, 3.16, 3.68 and 4.01 T were used to induce voltages in the flux-loops. The voltages are measured on-line a...

Klyukhin, V I; Ball, A; Curé, B; Gaddi, A; Gerwig, H; Hervé, A; Mulders, M; Loveless, R

2012-01-01T23:59:59.000Z

24

U.S. CMS - U.S. CMS @ Work - Doing Physics - User Software & Computing -  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

US CMS Tier-2 Computing Centers US CMS Tier-2 Computing Centers Introduction The USCMS Tier-2 sites are part of a global collaboration with the Compact Muon Solenoid (CMS) experiment. The experiment is being conducted at the Large Hadron Collider (LHC) at CERN. The Tier-2 sites provide needed infrastructure to meet the computational needs of the physicists working on the CMS experiment. The Tier-2 sites are active members of the Open Science Grid (OSG). Tier-2 Support Ticket Documentation Check http://www.uscms.org/uscms_at_work/physics/computing/grid/operations/SupportDocumentation.html for documentation detailing the process for handling tickets. Tier-2 Support Backup Schedules Tier-2 Administrators, please check http://www.uscms.org/uscms_at_work/physics/computing/grid/operations/SupportSchedule.html

25

Commissioning of the CMS Cryogenic System After Final Installation in the Underground Cavern  

E-Print Network [OSTI]

After having served for the surface tests of the Compact Muon Solenoid (CMS) magnet, the cold box and ancillaries of the CMS helium refrigerator have been dismantled, moved and re-installed in the USC55 cavern in 2007. The full re-commissioning in the cavern has been followed by several tests of the refrigerator to confirm its nominal performance before it was used for the magnet and detector tests in 2008. During these tests the safety modes of the refrigeration system have been tested and improved. After a nine-year project both, the magnet and the refrigeration system are now ready for the CMS operation.

Dupont, T; Perinic, G; 10.1063/1.3422381

2010-01-01T23:59:59.000Z

26

The performance of the CMS muon detector in proton-proton collisions at sqrt(s) = 7 TeV at the LHC  

E-Print Network [OSTI]

The performance of all subsystems of the CMS muon detector has been studied by using a sample of proton--proton collision data at sqrt(s) = 7 TeV collected at the LHC in 2010 that corresponds to an integrated luminosity of approximately 40 inverse picobarns. The measured distributions of the major operational parameters of the drift tube (DT), cathode strip chamber (CSC), and resistive plate chamber (RPC) systems met the design specifications. The spatial resolution per chamber was 80-120 micrometers in the DTs, 40-150 micrometers in the CSCs, and 0.8-1.2 centimeters in the RPCs. The time resolution achievable was 3 ns or better per chamber for all 3 systems. The efficiency for reconstructing hits and track segments originating from muons traversing the muon chambers was in the range 95-98%. The CSC and DT systems provided muon track segments for the CMS trigger with over 96% efficiency, and identified the correct triggering bunch crossing in over 99.5% of such events. The measured performance is well reproduced by Monte Carlo simulation of the muon system down to the level of individual channel response. The results confirm the high efficiency of the muon system, the robustness of the design against hardware failures, and its effectiveness in the discrimination of backgrounds.

The CMS Collaboration

2014-03-11T23:59:59.000Z

27

Solenoid magnet system for the Fermilab Mu2e experiment  

DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

The Fermilab Mu2e experiment seeks to measure the rare process of direct muon to electron conversion in the field of a nucleus. Key to the design of the experiment is a system of three superconducting solenoids; a muon production solenoid (PS) which is a 1.8 m aperture axially graded solenoid with a peak field of 5 T used to focus secondary pions and muons from a production target located in the solenoid aperture; an 'S shaped' transport solenoid (TS) which selects and transports the subsequent muons towards a stopping target; a detector solenoid (DS) which is an axially graded solenoid at the upstream end to focus transported muons to a stopping target, and a spectrometer solenoid at the downstream end to accurately measure the momentum of the outgoing conversion elections. The magnetic field requirements, the significant magnetic coupling between the solenoids, the curved muon transport geometry and the large beam induced energy deposition into the superconducting coils pose significant challenges to the magnetic, mechanical, and thermal design of this system. In this paper a conceptual design for the magnetic system which meets the Mu2e experiment requirements is presented.

Lamm, M J [Fermilab; Andreev, N [Fermilab /Boston U.; Ambrosio, G [Fermilab; Brandt, J [Fermilab; Coleman, R [CERN; Evbota, D [Fermilab; Kashikhin, V V [City Coll., N.Y.; Lopes, M [Fermilab; Miller, J [Fermilab; Nicol, T [KEK; Ostojic, R [Tsukuba

2012-06-08T23:59:59.000Z

28

Muon Collider  

SciTech Connect (OSTI)

Parameters are given of muon colliders with center of mass energies of 1.5 and 3 TeV. Pion production is from protons on a mercury target. Capture, decay, and phase rotation yields bunch trains of both muon signs. Six dimensional cooling reduces the emittances until the trains are merged into single bunches, one of each sign. Further cooling in 6 dimensions is then applied, followed by final transverse cooling in 50 T solenoids. After acceleration the muons enter the collider ring. Ongoing R&D is discussed.

Palmer, R.

2009-10-19T23:59:59.000Z

29

Papers on Muon Colliders  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Magnets for Muon Collider and Neutrino Storage Ring Magnets for Muon Collider and Neutrino Storage Ring (and Open Midplane Dipole for LARP): R. Gupta, et al., "High Field HTS Solenoid for a Muon Collider – Demonstrations, Challenges and Strategies, MT23, July 2013", presented at MT23, (talk) R. Weggel et al., "Open Midplane Dipoles for Muon Collider", 2011 Particle Accelerator Conference, New York (POSTER).. R. Gupta, M. Anerella, A. Ghosh, H. Kirk, R. Palmer, S. Plate, W. Sampson, Y. Shiroyanagi, P. Wanderer, B. Brandt, D. Cline, A. Garren, J. Kolonko, R. Scanlan, R. Weggel, "High field HTS R&D solenoid for muon collider", 2010 Applied Superconductivity Conference, Washington, DC, August 2010 >> Y. Shiroyanagi, W. Sampson, A. Ghosh, R. Gupta, "The Construction and

30

The Large Hadron Collider CERN is the European Particle Physics Laboratory and was founded in 1954 to  

E-Print Network [OSTI]

was assembled underground in a cavern the size of the nave of Westminster Abbey. CMS (Compact Muon Solenoid) CMS

31

Aluminum alloy production for the reinforcement of the CMS conductor  

E-Print Network [OSTI]

The Compact Muon Solenoid (CMS) is one of the general-purpose detectors to be provided for the Large Hadron Collider (LHC) project at CERN. The design field of the CMS superconducting magnet is 4 T, the magnetic length is 12.5 m and the free bore is 6 m. To reinforce the high-purity (99.998%) Al-stabilized conductor of the magnet against the magnetic loadings experienced during operation at 4.2 K, two continuous sections of Al-alloy (AA) reinforcement are Electron Beam (EB) welded to it. The reinforcements have a section of 24*18 mm and are produced in continuous 2.55 km lengths. The alloy EN AW-6082 has been selected for the reinforcement due to its excellent extrudability, high strength in the precipitation hardened states, high toughness and strength at cryogenic temperature and good EB weldability. Each of the continuous lengths of the reinforcement is extruded billet on billet and press quenched on-line from the extrusion temperature in an industrial extrusion plant. In order to insure the ready EB welda...

Sequeira-Lopes-Tavares, S; Campi, D; Curé, B; Horváth, I L; Riboni, P; Sgobba, Stefano; Smith, R P

2002-01-01T23:59:59.000Z

32

Progress on the Design and Fabircation of the MICE SpectrometerSolenoids  

SciTech Connect (OSTI)

The Muon Ionization Cooling Experiment (MICE) willdemonstrate ionization cooling in a short section of a realistic coolingchannel using a muon beam at Rutherford Appleton Laboratory (RAL) in theUK. A five-coil, superconducting spectrometer solenoid magnet at each endof the cooling channel will provide a 4 T uniform field region for thescintillating fiber tracker within the magnet bore tubes. The trackermodules are used to measure the muon beam emittance as it enters andexits the cooling channel. The cold mass for the 400 mm warm bore magnetconsists of two sections: a three-coil spectrometer magnet and a two-coilmatching section that matches the uniform field of the solenoid into theMICE cooling channel. The spectrometer solenoid detailed designandanalysis has been completed, and the fabrication of the magnets is wellunder way. The primary features of the spectrometer solenoid magnet andmechanical designs are presented along with a summary of key fabricationissues and photos of the construction.

Virostek, S.P.; Green, M.A.; Lia, D.; Sizman, M.S.

2007-06-20T23:59:59.000Z

33

Conceptual design of the Mu2e production solenoid cold mass  

SciTech Connect (OSTI)

The Muon-to-Electron conversion experiment (Mu2e), under development at Fermilab, seeks to detect direct muon to electron conversion to provide evidence for a process violating muon and electron lepton number conservation that cannot be explained by the Standard Model of particle physics. The required magnetic field is produced by a series of superconducting solenoids of various apertures and lengths. This paper describes the conceptual design of the 5 T, 4 m long solenoid cold mass with 1.67 m bore with the emphasis on the magnetic, radiation and thermal analyses.

Kashikhin, V.V.; Ambrosio, G.; Andreev, N.; Lamm, M.; Mokhov, N.V.; Nicol, T.H.; Page, T.M.; Pronskikh, V.; /Fermilab

2011-06-01T23:59:59.000Z

34

solenoid_web.DVI  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Proposal Proposal for a Solenoidal Spectrometer to Study Reactions with Short-Lived Beams A. H. Wuosmaa 1 , B. B. Back 2 , C. J. Lister 2 , K. E. Rehm 2 , J. P. Schiffer 2 , and S. J. Freeman 3 1 Physics Department, Western Michigan University, Kalamazoo, MI 49008-5252 2 Physics Division, Argonne National Laboratory, 9700 S. Cass Ave, Argonne IL 60439 and 3 Department of Physics and Astronomy, University of Manchester, Schuster Laboratory, Brunswick Street, Manchester, M13 9PL, England (Dated: November 22, 2005) Abstract We propose to construct a new type of spectrometer for the study of reactions in inverse kine- matics, built around a high-field magnetic solenoid. This device has significant advantages over more conventional approaches to measurements of key reactions, and is essential to the study of short-lived nuclei. The technique is directly applicable to the research programs at ATLAS,

35

Measurements of the Higgs boson mass and width in the four-lepton final state and electron reconstruction in the CMS experiment at the LHC  

E-Print Network [OSTI]

This thesis document reports measurements of the mass and width of the new boson re- cently discovered at the Large Hadron Collider (LHC), candidating to be the Standard Model Higgs boson. The analysis uses proton-proton collision data recorded by the Compact Muon Solenoid (CMS) detector at the LHC, corresponding to integrated luminosities of $5.1~fb^{?1}$ at $7~$TeV center of mass energy and $19.7~fb^{?1}$ at $8~$TeV center of mass energy. Set of events selecting Higgs boson via the $H\\to ZZ$ decay channel, where both $Z$ bosons decay to electron or muon lepton pairs, is used for the Higgs boson properties measurements. A precise measurement of its mass has been performed and gives $125.6\\pm0.4\\mbox{(stat)}\\pm0.2\\mbox{(syst)}~$GeV. Constraints on the Higgs boson width were established using its off-shell production and decay to a pair of $Z$ bosons, where one $Z$ boson decays to an electron or muon pair, and the other to an electron, muon, or neutrino pair. The obtained result is an upper limit on the Hi...

Dalchenko, Mykhailo; Charlot, Claude

36

LCLS Gun Solenoid Design Considerations  

SciTech Connect (OSTI)

The LCLS photocathode rf gun requires a solenoid immediately downstream for proper emittance compensation. Such a gun and solenoid have been operational at the SSRL Gun Test Facility (GTF) for over eight years. Based on magnetic measurements and operational experience with the GTF gun solenoid multiple modifications are suggested for the LCLS gun solenoid. The modifications include adding dipole and quadrupole correctors inside the solenoid, increasing the bore to accommodate the correctors, decreasing the mirror plate thickness to allow the solenoid to move closer to the cathode, cutouts in the mirror plate to allow greater optical clearance with grazing incidence cathode illumination, utilizing pancake coil mirror images to compensate the first and second integrals of the transverse fields and incorporating a bipolar power supply to allow for proper magnet standardization and quick polarity changes. This paper describes all these modifications plus the magnetic measurements and operational experience leading to the suggested modifications.

Schmerge, John

2010-12-10T23:59:59.000Z

37

Experimental Results of Dynamic Load Scheduling in the CMS Data Acquisition System  

Science Journals Connector (OSTI)

The online Data Acquisition system of the Compact Muon Solenoid ... s Large Hadron Collider is designed to collect data corresponding to a single collision of particles, ... experimental results of employing a di...

Michal Simon; Hannes Sakulin; Stanislaw Kozielski

2013-01-01T23:59:59.000Z

38

Diborane Electrode Response in 3D Silicon Sensors for the CMS and ATLAS Experiments  

SciTech Connect (OSTI)

Unusually high leakage currents have been measured in test wafers produced by the manufacturer SINTEF containing 3D pixel silicon sensor chips designed for the ATLAS (A Toroidal LHC ApparatuS) and CMS (Compact Muon Solenoid) experiments. Previous data has shown the CMS chips as having a lower leakage current after processing than ATLAS chips. Some theories behind the cause of the leakage currents include the dicing process and the usage of copper in bump bonding, and with differences in packaging and handling between the ATLAS and CMS chips causing the disparity between the two. Data taken at SLAC from a SINTEF wafer with electrodes doped with diborane and filled with polysilicon, before dicing, and with indium bumps added contradicts this past data, as ATLAS chips showed a lower leakage current than CMS chips. It also argues against copper in bump bonding and the dicing process as main causes of leakage current as neither were involved on this wafer. However, they still display an extremely high leakage current, with the source mostly unknown. The SINTEF wafer shows completely different behavior than the others, as the FEI3s actually performed better than the CMS chips. Therefore this data argues against the differences in packaging and handling or the intrinsic geometry of the two as a cause in the disparity between the leakage currents of the chips. Even though the leakage current in the FEI3s overall is lower, the current is still significant enough to cause problems. As this wafer was not diced, nor had it any copper added for bump bonding, this data argues against the dicing and bump bonding as causes for leakage current. To compliment this information, more data will be taken on the efficiency of the individual electrodes of the ATLAS and CMS chips on this wafer. The electrodes will be shot perpendicularly with a laser to test the efficiency across the width of the electrode. A mask with pinholes has been made to focus the laser to a beam smaller than the width of an electrode in order to properly scan it. This will provide more information on whether something in the electrodes, such as the polysilicon filling, is contributing to the leakage current or if there is another cause to be found. It will also reveal whether the diborane doping method and the new polysilicon filling has increased the electrode efficiency as expected. Thus, the cause of these leakage currents on the wafers from SINTEF has yet to be definitively found.

Brown, Emily R.; /Reed Coll. /SLAC

2011-06-22T23:59:59.000Z

39

Effect of high solenoidal magnetic fields on breakdown voltages of high vacuum 805 MHz cavities  

SciTech Connect (OSTI)

There is an on going international collaboration studying the feasibility and cost of building a muon collider or neutrino factory [1,2]. An important aspect of this study is the full understanding of ionization cooling of muons by many orders of magnitude for the collider case. An important muon ionization cooling experiment, MICE [3], has been proposed to demonstrate and validate the technology that could be used for cooling. Ionization cooling is accomplished by passing a high-emittance muon beam alternately through regions of low Z material, such as liquid hydrogen, and very high accelerating RF Cavities within a multi-Tesla solenoidal field. To determine the effect of very large solenoidal magnetic fields on the generation of dark current, x-rays and on the breakdown voltage gradients of vacuum RF cavities, a test facility has been established at Fermilab in Lab G. This facility consists of a 12 MW 805 MHz RF station and a large warm bore 5 T solenoidal superconducting magnet containing a pill box type cavity with thin removable window apertures. This system allows dark current and breakdown studies of different window configurations and materials. The results of this study will be presented. The study has shown that the peak achievable accelerating gradient is reduced by a factor greater than 2 when solenoidal field of greater than 2 T are applied to the cavity.

Moretti, A.; Bross, A.; Geer, S.; Qian, Z.; /Fermilab; Norem, J.; /Argonne; Li, D.; Zisman, M.; /LBL, Berkeley; Torun, Y.; /IIT, Chicago; Rimmer, R.; /Jefferson Lab; Errede,; /Illinois U., Urbana

2005-10-01T23:59:59.000Z

40

e Lens Solenoid | Superconducting Magnet Division  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Electron Lens Solenoid Electron Lens Solenoid To increase the proton beam luminosity in RHIC, an electron lens (e-lens) magnet system with two superconducting solenoids is being built at Brookhaven National Laboratory. Initial Design of 200 mm, 6T Superconducting Solenoid for e-lens (pdf), R. Gupta, 3/30/10 Iterated Design of 200 mm, 6T Superconducting Solenoid for e-lens (pdf), R. Gupta, 4/6/10 Corrector Designs for Superconducting Solenoid for e-lens (pdf), R. Gupta, 4/14/10 eLens Layout (pdf), P. Kovach, 5/25/10 eLens Main Solenoid (pdf), A. Marone, 5/25/10 Optimization in Corrector Design for Superconducting Solenoid for e-Lens (pdf), R. Gupta, 6/15/10 Main Solenoid Axial Force Retention (pdf), A. Marone 8/24/10 Superconducting Solenoid for e-lens with Fringe Field Coil (pdf), R.

Note: This page contains sample records for the topic "muon solenoid cms" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Measurement of forward-backward asymmetry A{sub FB} and of the weak mixing angle in processes of dilepton production in proton-proton collisions at {radical} s = 7 TeV in the CMS experiment at the LHC  

SciTech Connect (OSTI)

The results obtained by measuring the forward-backward asymmetry (A{sub FB}) of Drell-Yan lepton pairs in proton-proton collisions at {radical} s = 7 TeV at the LHC are presented. This asymmetry is measured as a function of the dilepton mass and rapidity in the dielectron and dimuon channels. The values of A{sub FB} were found for invariant masses of dileptons in the range of 40 Less-Than-Or-Slanted-Equal-To M{sub ll} Less-Than-Or-Slanted-Equal-To 600 GeV. The results for the effective weak mixing angle that were deduced from data on dimuon production in Drell-Yan processes are also presented. The respective data sample was collected by using the Compact Muon Solenoid (CMS) detector over the period spanning the years 2010 and 2011. The measured asymmetry and the effective weak mixing are consistent with the respective Standard Model predictions.

Gorbunov, I. N., E-mail: Ilya.Gorbunov@cern.ch; Shmatov, S. V., E-mail: shmatov@cern.ch [Joint Institute for Nuclear Research (Russian Federation)

2013-09-15T23:59:59.000Z

42

U.S. CMS - CMS Physics  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

CMS Physics CMS Physics CMS is a general-purpose particle physics experiment. Designed to see a wide range of particles and phenomena produced in LHC collisions, each involves approximately 2,000 physicists from more than 30 countries. These scientists will use the data collected from the complex CMS detector to search for new phenomena including the Higgs boson, supersymmetry, and extra dimensions. They will also measure the properties of previously-discovered quarks and bosons with unprecedented precision, and be on the lookout for completely new, unpredicted phenomena. CMS@CERN CMS Outreach @ CERN LHC Physics Center (LPC) CMS Center at Fermilab Wikipedia Article How do they know what to look for? Physicists have spent decades developing the Standard Model, a set of theories that describe in detail the

43

Thermal Design of the Mu2e Detector Solenoid  

SciTech Connect (OSTI)

The reference design for a superconducting Detector Solenoid (DS) for the Mu2e experiment has been completed. The main functions of the DS are to provide a graded field in the region of the stopping target which ranges from 2 T to 1 T and a uniform precision magnetic field of 1 T in a volume large enough to house a tracker downstream of the stopping target. The inner diameter of the magnet cryostat is 1.9 m and the length is 10.9 m. The gradient section of the magnet is about 4 m long and the spectrometer section with a uniform magnetic field is about 6 m long. The inner cryostat wall supports the stopping target, tracker, calorimeter and other equipment installed in the DS. This warm bore volume is under vacuum during operation. It is sealed on one end by the muon beam stop, while it is open on the other end where it interfaces with the Transport Solenoid. The operating temperature of the magnetic coil is 4.7 K and is indirectly cooled with helium flowing in a thermosiphon cooling scheme. This paper describes the thermal design of the solenoid, including the design aspects of the thermosiphon for the coil cooling, forced flow cooling of the thermal shields with 2 phase LN2 (Liquid Nitrogen) and the transient studies of the cool down of the cold mass as well.

Dhanaraj, Nandhini; Wands, Bob; Buehler, Marc; Feher, Sandor; Page, Thomas M; Peterson, Thomas; Schmitt, Richard L

2014-12-18T23:59:59.000Z

44

Magnets for Muon 6D Cooling Channels  

SciTech Connect (OSTI)

The Helical Cooling Channel (HCC), an innovative technique for six-dimensional (6D) cooling of muon beams using a continuous absorber inside superconducting magnets, has shown considerable promise based on analytic and simulation studies. The implementation of this revolutionary method of muon cooling requires high field superconducting magnets that provide superimposed solenoid, helical dipole, and helical quadrupole fields. Novel magnet design concepts are required to provide HCC magnet systems with the desired fields for 6D muon beam cooling. New designs feature simple coil configurations that produce these complex fields with the required characteristics, where new high field conductor materials are particularly advantageous. The object of the program was to develop designs and construction methods for HCC magnets and design a magnet system for a 6D muon beam cooling channel. If successful the program would develop the magnet technologies needed to create bright muon beams for many applications ranging from scientific accelerators and storage rings to beams to study material properties and new sources of energy. Examples of these applications include energy frontier muon colliders, Higgs and neutrino factories, stopping muon beams for studies of rare fundamental interactions and muon catalyzed fusion, and muon sources for cargo screening for homeland security.

Johnson, Rolland [Muons, Inc.; Flanagan, Gene [Muons, Inc.

2014-09-10T23:59:59.000Z

45

Integrating and automating the software environment for the Beam and Radiation Monitoring for CMS  

E-Print Network [OSTI]

The real-time online visualization framework used by the Beam and Radiation Monitoring group at the Compact Muon Solenoid at Large Hadron Collider, CERN. The purpose of the visualization framework is to provide real-time diagnostic of beam conditions, which defines the set of the requirements to be met by the framework. Those requirements include data quality assurance, vital safety issues, low latency, data caching, etc. The real-time visualization framework is written in the Java programming language and based on JDataViewer--a plotting package developed at CERN. At the current time the framework is run by the Beam and Radiation Monitoring, Pixel, Tracker groups, Run Field Manager and others. It contributed to real-time data analysis during 2009-2010 runs as a stable monitoring tool. The displays reflect the beam conditions in a real-time with the low latency level, thus it is the first place at the CMS detector where the beam collisions are observed.

Filyushkina, Olga; Juslin, J

2010-01-01T23:59:59.000Z

46

Development and Evaluation of a Test System for the Quality Assurance during the Mass Production of Silicon Microstrip Detector Modules for the CMS Experiment  

E-Print Network [OSTI]

The Compact Muon Solenoid (CMS) is one of four large-scale experiments that is going to be installed at the Large Hadron Collider (LHC) at the European Laboratory for Particle Physics (CERN). For CMS an inner tracking system entirely equipped with silicon microstrip detectors was chosen. With an active area of about 198 m2 it will be the largest tracking device of the world that was ever constructed using silicon sensors. The basic components in the construction of the tracking system are approximately 16,000 so-called modules, which are pre-assembled units consisting of the sensors, the readout electronics and a support structure. The module production is carried out by a cooperation of number of institutes and industrial companies. To ensure the operation of the modules within the harsh radiation environment extensive tests have to be performed on all components. An important contribution to the quality assurance of the modules is made by a test system of which all components were developed in Aachen. In ad...

Franke, Torsten

2005-01-01T23:59:59.000Z

47

Solenoid and monocusp ion source  

DOE Patents [OSTI]

An ion source which generates hydrogen ions having high atomic purity incorporates a solenoidal permanent magnets to increase the electron path length. In a sealed envelope, electrons emitted from a cathode traverse the magnetic field lines of a solenoid and a monocusp magnet between the cathode and a reflector at the monocusp. As electrons collide with gas, the molecular gas forms a plasma. An anode grazes the outer boundary of the plasma. Molecular ions and high energy electrons remain substantially on the cathode side of the cusp, but as the ions and electrons are scattered to the aperture side of the cusp, additional collisions create atomic ions. The increased electron path length allows for smaller diameters and lower operating pressures.

Brainard, John Paul (Albuquerque, NM); Burns, Erskine John Thomas (Albuquerque, NM); Draper, Charles Hadley (Albuquerque, NM)

1997-01-01T23:59:59.000Z

48

Solenoid and monocusp ion source  

DOE Patents [OSTI]

An ion source which generates hydrogen ions having high atomic purity incorporates a solenoidal permanent magnets to increase the electron path length. In a sealed envelope, electrons emitted from a cathode traverse the magnetic field lines of a solenoid and a monocusp magnet between the cathode and a reflector at the monocusp. As electrons collide with gas, the molecular gas forms a plasma. An anode grazes the outer boundary of the plasma. Molecular ions and high energy electrons remain substantially on the cathode side of the cusp, but as the ions and electrons are scattered to the aperture side of the cusp, additional collisions create atomic ions. The increased electron path length allows for smaller diameters and lower operating pressures. 6 figs.

Brainard, J.P.; Burns, E.J.T.; Draper, C.H.

1997-10-07T23:59:59.000Z

49

CMS ROC Talks  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

FNAL ROC Presentations & Notes FNAL ROC Presentations & Notes ROC Web Page CMS Agenda Server CMS Daily Mtgs LPC Talks LHC@FNAL Public Docs CMS Notes 2007-12-17: All Experimenters' Mtg - "CMS Status and GREN" [Kaori Maeshima] (ppt) (pdf) 2007-11-12: All Experimenters' Mtg - "CMS Installation and Commissioning" [Kaori Maeshima] (ppt) (pdf) 2007-11-08: Andreas Meyer's visit - "DCS WBM" [Zongru Wan] (pdf) 2007-10-05: All US CMS Mtg - "Commissioning, Global Runs & ROC" [Kaori Maeshima] (pdf) 2007-09-05: CHEP 2007 - "CMS Online Web-Based Monitoring and Remote Operations" [Bill Badgett] (ppt) (pdf) 2007-08-27: DQM Workshop - "DQM Output Archiving and Retrieval" [Bill Badgett, Kaori Maeshima] (ppt) (pdf) 2007-08-16: Kansas State DOE Review - "CMS Web-Based Monitoring" [Zongru Wan] (pdf)

50

Quench anaylsis of MICE spectrometer superconducting solenoid  

SciTech Connect (OSTI)

MICE superconducting spectrometer solenoids fabrication and tests are in progress now. First tests of the Spectrometer Solenoid discovered some issues which could be related to the chosen passive quench protection system. Both solenoids do not have heaters and quench propagation relied on the 'quench back' effect, cold diodes, and shunt resistors. The solenoids have very large inductances and stored energy which is 100% dissipated in the cold mass during a quench. This makes their protection a challenging task. The paper presents the quench analysis of these solenoids based on 3D FEA solution of coupled transient electromagnetic and thermal problems. The simulations used the Vector Fields QUENCH code. It is shown that in some quench scenarios, the quench propagation is relatively slow and some areas can be overheated. They describe ways of improving the solenoids quench protection in order to reduce the risk of possible failure.

Kashikhin, Vladimir; Bross, Alan; /Fermilab; Prestemon, Soren; / /LBL, Berkeley

2011-09-01T23:59:59.000Z

51

Muon systems  

SciTech Connect (OSTI)

The designs of both the GEM and SDC muon systems an the technological choices are reviewed. In particular, the chamber options for the detectors are discussed.

Bensinger, J.

1991-10-01T23:59:59.000Z

52

Magnetic and Cryogenic Design of the MICE Coupling Solenoid Magnet System  

SciTech Connect (OSTI)

The Muon Ionization Cooling Experiment (MICE) will demonstrate ionization cooling in a short section of a realistic cooling channel using a muon beam at Rutherford Appleton Laboratory in the UK. The coupling magnet is a superconducting solenoid mounted around four 201MHz RF cavities, which produces magnetic field up to 2.6 T on the magnet centerline to keep muons within the iris of RF cavities windows. The coupling coil with inner radius of 750mm, length of 285mm and thickness of 102.5mm will be cooled by a pair of 1.5 W at 4.2 K small coolers. This paper will introduce the updated engineering design of the coupling magnet made by ICST in China. The detailed analyses on magnetic fields, stresses induced during the processes of winding, cool down and charging, and cold mass support assembly are presented as well.

Wang, Li; Xu, FengYu; Wu, Hong; Liu, XiaoKum; Li, LanKai; Guo, XingLong; Chen, AnBin; Green, Michael A; Li, D.R.; Virostek, Steve; Pan, H.

2008-08-02T23:59:59.000Z

53

Muon Tridents  

Science Journals Connector (OSTI)

Under the assumption that muons are heavy electrons, the total cross section for muon tridents on lead is calculated for 12.0-BeV incident muons including the effect of exchange for identical particles in the final state; various differential cross sections are presented. The positron spectrum for 31.5-MeV electron tridents on copper is also calculated and found to agree with Criegee's experimental results. It is found that the entire effect of statistics is confined to a region of phase space where the two leptons of like charge in the final state have an invariant mass of less than 3.5 times their rest mass.

Michael J. Tannenbaum

1968-03-25T23:59:59.000Z

54

Commissioning of CMS and early standard model measurements with jets, missing transverse energy and photons at the LHC  

E-Print Network [OSTI]

We report on the status and history of the CMS commissioning, together with selected results from cosmic-ray muon data. The second part focuses on strategies for optimizing the reconstruction of jets, missing transverse energy and photons for early standard model measurements at ATLAS and CMS with the first collision data from the Large Hadron Collider at CERN.

T. Christiansen

2008-05-13T23:59:59.000Z

55

On the possibility to use ATLAS and CMS detectors for neutrino physics  

E-Print Network [OSTI]

Energetic primary cosmic rays entering the Earth's atmosphere generate flux of secondary particles including neutrinos. Muon neutrinos passed through the Earth and produced muons via the charged current reaction can be registered by experimental setups intended for the measurements with colliding beams. Due to large geometrical size and advanced muon detecting system such detectors as ATLAS and CMS on LHC have chance to contribute also into the neutrino physics. The estimation of possible rates of up-going muons produced by neutrinos is given.

A. Guskov

2009-09-14T23:59:59.000Z

56

D0 Solenoid Commissioning September 1998  

SciTech Connect (OSTI)

D-Zero installed a new 2 Tesla superconducting solenoid magnet into the central tracking region of the D-Zero detector. This report documents the cryogenic performance of the superconducting solenoid during its first cryogenic operation at Fermilab. By necessity, the liquid helium refrigerator was also operated. This was the second time the refrigerator plant has been operated. The refrigerator's performance is also documented herein.

Rucinski, R.; /Fermilab

1998-10-12T23:59:59.000Z

57

Muon Beam Helical Cooling Channel Design  

SciTech Connect (OSTI)

The Helical Cooling Channel (HCC) achieves effective ionization cooling of the six-dimensional (6d) phase space of a muon beam by means of a series of 21st century inventions. In the HCC, hydrogen-pressurized RF cavities enable high RF gradients in strong external magnetic fields. The theory of the HCC, which requires a magnetic field with solenoid, helical dipole, and helical quadrupole components, demonstrates that dispersion in the gaseous hydrogen energy absorber provides effective emittance exchange to enable longitudinal ionization cooling. The 10-year development of a practical implementation of a muon-beam cooling device has involved a series of technical innovations and experiments that imply that an HCC of less than 300 m length can cool the 6d emittance of a muon beam by six orders of magnitude. We describe the design and construction plans for a prototype HCC module based on oxygen-doped hydrogen-pressurized RF cavities that are loaded with dielectric, fed by magnetrons, and operate in a superconducting helical solenoid magnet.

Johnson, Rolland; Ankenbrandt, Charles; Flanagan, G.; Kazakevich, G.M.; Marhauser, Frank; Neubauer, Michael; Roberts, T.; Yoshikawa, C.; Derbenev, Yaroslav; Morozov, Vasiliy; Kashikhin, V.S.; Lopes, Mattlock; Tollestrup, A.; Yonehara, Katsuya; Zloblin, A.

2013-06-01T23:59:59.000Z

58

Overview of experimental results in Pb-Pb collisions at ?s NN = 2.76 TeV by the CMS Collaboration  

E-Print Network [OSTI]

The CMS experiment at the LHC is a general-purpose apparatus with a set of large acceptance and high granularity detectors for hadrons, electrons, photons and muons, providing unique capabilities for both proton–proton and ...

Wyslouch, Boleslaw

59

Muon Muon Collider: Feasibility Study  

SciTech Connect (OSTI)

A feasibility study is presented of a 2 + 2 TeV muon collider with a luminosity of L = 10{sup 35} cm{sup -2}s{sup -1}. The resulting design is not optimized for performance, and certainly not for cost; however, it does suffice - we believe - to allow us to make a credible case, that a muon collider is a serious possibility for particle physics and, therefore, worthy of R and D support so that the reality of, and interest in, a muon collider can be better assayed. The goal of this support would be to completely assess the physics potential and to evaluate the cost and development of the necessary technology. The muon collider complex consists of components which first produce copious pions, then capture the pions and the resulting muons from their decay; this is followed by an ionization cooling channel to reduce the longitudinal and transverse emittance of the muon beam. The next stage is to accelerate the muons and, finally, inject them into a collider ring wich has a small beta function at the colliding point. This is the first attempt at a point design and it will require further study and optimization. Experimental work will be needed to verify the validity of diverse crucial elements in the design. Muons because of their large mass compared to an electron, do not produce significant synchrotron radiation. As a result there is negligible beamstrahlung and high energy collisions are not limited by this phenomena. In addition, muons can be accelerated in circular devices which will be considerably smaller than two full-energy linacs as required in an e{sup +} - e{sup -} collider. A hadron collider would require a CM energy 5 to 10 times higher than 4 TeV to have an equivalent energy reach. Since the accelerator size is limited by the strength of bending magnets, the hadron collider for the same physics reach would have to be much larger than the muon collider. In addition, muon collisions should be cleaner than hadron collisions. There are many detailed particle reactions which are open to a muon collider and the physics of such reactions - what one learns and the necessary luminosity to see interesting events - are described in detail. Most of the physics accesible to an e{sup +} - e{sup -} collider could be studied in a muon collider. In addition the production of Higgs bosons in the s-channel will allow the measurement of Higgs masses and total widths to high precision; likewise, t{bar t} and W{sup +}W{sup -} threshold studies would yield m{sub t} and m{sub w} to great accuracy. These reactions are at low center of mass energy (if the MSSM is correct) and the luminosity and {Delta}p/p of the beams required for these measurements is detailed in the Physics Chapter. On the other hand, at 2 + 2 TeV, a luminosity of L {approx} 10{sup 35} cm{sup -2}s{sup -1} is desirable for studies such as, the scattering of longitudinal W bosons or the production of heavy scalar particles. Not explored in this work, but worth noting, are the opportunities for muon-proton and muon-heavy ion collisions as well as the enormous richness of such a facility for fixed target physics provided by the intense beams of neutrinos, muons, pions, kaons, antiprotons and spallation neutrons. To see all the interesting physics described herein requires a careful study of the operation of a detector in the very large background. Three sources of background have been identified. The first is from any halo accompanying the muon beams in the collider ring. Very carefully prepared beams will have to be injected and maintained. The second is due to the fact that on average 35% of the muon energy appears in its decay electron. The energy of the electron subsequently is converted into EM showers either from the synchrotron radiation they emit in the collider magnetic field or from direct collision with the surrounding material. The decays that occur as the beams traverse the low beta insert are of particular concern for detector backgrounds. A third source of background is e{sup +} - e{sup -} pair creation from {mu}{sup +} - {mu}{sup -} interaction. Studies of

Gallardo, J.C.; Palmer, R.B.; /Brookhaven; Tollestrup, A.V.; /Fermilab; Sessler, A.M.; /LBL, Berkeley; Skrinsky, A.N.; /Novosibirsk, IYF; Ankenbrandt, C.; Geer, S.; Griffin, J.; Johnstone, C.; Lebrun, P.; McInturff, A.; Mills, Frederick E.; Mokhov, N.; Moretti, A.; Neuffer, D.; Ng, K.Y.; Noble, R.; Novitski, I.; Popovic, M.; Qian, C.; Van Ginneken, A. /Fermilab /Brookhaven /Wisconsin U., Madison /Tel Aviv U. /Indiana U. /UCLA /LBL, Berkeley /SLAC /Argonne /Sobolev IM, Novosibirsk /UC, Davis /Munich, Tech. U. /Virginia U. /KEK, Tsukuba /DESY /Novosibirsk, IYF /Jefferson Lab /Mississippi U. /SUNY, Stony Brook /MIT /Columbia U. /Fairfield U. /UC, Berkeley; ,

2012-04-05T23:59:59.000Z

60

Charge recombination in the muon collider cooling channel  

SciTech Connect (OSTI)

The final stage of the ionization cooling channel for the muon collider must transversely recombine the positively and negatively charged bunches into a single beam before the muons can be accelerated. It is particularly important to minimize any emittance growth in this system since no further cooling takes place before the bunches are collided. We have found that emittance growth could be minimized by using symmetric pairs of bent solenoids and careful matching. We show that a practical design can be found that has transmission {approx}99%, emittance growth less than 0.1%, and minimal dispersion in the recombined bunches.

Fernow, R. C.; Palmer, R. B. [Physics Department, Brookhaven National Laboratory, Upton, NY 11973 (United States)

2012-12-21T23:59:59.000Z

Note: This page contains sample records for the topic "muon solenoid cms" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

The Helium Cooling System and Cold Mass Support System for theMICE Coupling Solenoid  

SciTech Connect (OSTI)

The MICE cooling channel consists of alternating threeabsorber focus coil module (AFC) and two RF coupling coil module (RFCC)where the process of muon cooling and reacceleration occurs. The RFCCmodule comprises a superconducting coupling solenoid mounted around fourconventional conducting 201.25 MHz closed RF cavities and producing up to2.2T magnetic field on the centerline. The coupling coil magnetic fieldis to produce a low muon beam beta function in order to keep the beamwithin the RF cavities. The magnet is to be built using commercialniobium titanium MRI conductors and cooled by pulse tube coolers thatproduce 1.5 W of cooling capacity at 4.2 K each. A self-centering supportsystem is applied for the coupling magnet cold mass support, which isdesigned to carry a longitudinal force up to 500 kN. This report willdescribe the updated design for the MICE coupling magnet. The cold masssupport system and helium cooling system are discussed indetail.

Wang, L.; Wu, H.; Li, L.K.; Green, M.A.; Liu, C.S.; Li, L.Y.; Jia, L.X.; Virostek, S.P.

2007-08-27T23:59:59.000Z

62

Search for Supersymmetry in the Jets + Met + TAUS Final State Using the CMS Detector at the LHC  

E-Print Network [OSTI]

Muon Solenoid detector at the Large Hadron Collider in 2011, and it corresponds to an integrated luminosity of 5fb^?1. The tau isolation variable was optimized for this search. The number of events corresponding to standard model processes in the final...

Montalvo, Roy Joaquin

2013-02-28T23:59:59.000Z

63

Muon RLA - design status and simulations  

SciTech Connect (OSTI)

The Neutrino Factory baseline design involves a complex chain of accelerators beginning with a linac. This first pre-linac follows the capture and bunching section and accelerates the muons from about 244 to 900 MeV and must accept a high emittance beam about 30 cm wide with a 10% energy spread. It uses counterwound, shielded superconducting solenoids and 201 MHz superconducting cavities, and currently consists of 24 3 m and 24 5 m long cryomodules. The next stage is a 1st dogbone-shaped RLA that takes the total energy from 900 MeV to 3.6 GeV in 4.5 passes, followed by a 2nd RLA that takes the energy from 3.6 to 12.6 GeV in 4.5 passes. Simulations are in progress to optimize the optics and determine the radiation loads from beam loss and muon decay.

Beard, Kevin B. [Muons, Inc., Batavia, IL (United States); Bogacz, Slawomir A. [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Morozov, Vasiliy S. [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Roblin, Yves R. [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)

2013-02-01T23:59:59.000Z

64

Muon Collider Progress: Accelerators  

E-Print Network [OSTI]

in Fig. 7. The muons lose energy in all three dimensions viaincrease the energy loss of high-energy muons compared withthat for low-energy muons. Conceptually, there are several

Zisman, Michael S.

2012-01-01T23:59:59.000Z

65

Muon Collider Progress: Accelerators  

E-Print Network [OSTI]

A N. V. Mokhov et al. , “Muon Collider Interaction RegionR. B. Palmer et al. , “Muon Colliders,” in the 9th AdvancedB. Palmer and R. Fernow, “Muon Collider Final Cooling in 30–

Zisman, Michael S.

2012-01-01T23:59:59.000Z

66

The Muon Collider  

E-Print Network [OSTI]

11] D. Summers et al. , “Muon Acceleration to 750 GeV in theThe muon collider M. S. Zisman * Lawrence Berkeley Nationalnew type of accelerator, the muon collider. This accelerator

Zisman, Michael S.

2011-01-01T23:59:59.000Z

67

The Muon Collider  

E-Print Network [OSTI]

11] D. Summers et al. , “Muon Acceleration to 750 GeV in theThe muon collider M. S. Zisman * Lawrence Berkeley Nationalnew type of accelerator, the muon collider. This accelerator

Zisman, Michael S

2010-01-01T23:59:59.000Z

68

Kicked surface muon beams  

Science Journals Connector (OSTI)

The possibility of splitting a surface muon beam into three separate components using an ... and could be very effectively used to provide muons to time differential ?SR experiments.

J. L. Beveridge

1992-01-01T23:59:59.000Z

69

CMS ROC FAQ  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ROC Frequently Asked Questions ROC Frequently Asked Questions What happened to the CMSUAF cluster? How does one organize a videoconference at CERN? Where can I find the pictures taken by Visual Media Services? How can I access GUIs and protected web pages from outside the .cms network? back to questions Q: What happened to the CMSUAF cluster? A: The CMSUAF interactive cluster was retired due to age and security issues. Users should now use the CMSLPC interactive cluster. Additional details can be found in the Computing Announcements presentation given by Jon Bakken at the US CMS Mtg on 25 Jan 2008. Also see the Connect to the LPC Cluster web page for instructions which are maintained by the CMS Tier-1 operations support group. [Added 10 Mar 2008 - Alan L. Stone] back to questions Q:How does one organize a videoconference at CERN?

70

The Muon LINAC for the International Design Study of the Neutrino Factory  

SciTech Connect (OSTI)

The first stage of muon acceleration in the Neutrino Factory utilises a superconducting linac to accelerate muons from 244 MeV to 900 MeV. The linac was split into three types of cryomodules with decreasing magnetic fields and increasing amounts of RF voltage but with the design of the superconducting solenoid and RF cavities being the same for all cryomodules. The current status of the muon linac for the International Design Study for the Neutrino Factory will be presented including a final lattice design of the linac and tracking simulations.

A. Kurup, C. Bontoiu, Morteza Aslaninejad, J. Pozimski, A. Bogacz, V.S. Morozov, Y.R. Roblin, K.B. Beard

2011-09-01T23:59:59.000Z

71

COMPENSATION OF DETECTOR SOLENOID IN SUPER-B  

SciTech Connect (OSTI)

The SUPER-B detector solenoid has a strong 1.5 T field in the Interaction Region (IR) area, and its tails extend over the range of several meters. The main effect of the solenoid field is coupling of the horizontal and vertical betatron motion which must be corrected in order to preserve the small design beam size at the Interaction Point. The additional effects are orbit and dispersion caused by the angle between the solenoid and beam trajectories. The proposed correction system provides local compensation of the solenoid effects independently for each side of the IR. It includes 'bucking' solenoids to remove the solenoid field tails and a set of skew quadrupoles, dipole correctors and anti-solenoids to cancel linear perturbations to the optics. Details of the correction system are presented.

Nosochkov, Yuri; Bertsche, Kirk; Sullivan, Michael; /SLAC

2011-06-02T23:59:59.000Z

72

U.S. CMS - U.S. CMS @ Work  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Welcome Welcome IMPORTANT Safety at CERN LHC Safety Assessment Group Report Safety and access procedures for CMS - Updated 25 Feb. 2008 (pdf) Information for US Personnel (pdf) Police 117, Fire 118, Ambulance 144 Other emergency contact LHC Resources at Fermilab LPC ROC CMS Center Traveling Getting registered with the User's Office Map Visa information short term (< 3 months) long term Relocation Moving to CERN Car leasing CERN logistics CERN Shuttle Moving equipment CERN stores catalog Getting connected CERN Computer Services and Support Printing Life in Geneva "FAQ" for newcomers Quick Links CMS CMS@Work CMS Times CMSDOC CMS Result Archive LHC U.S. LHC Project Office U.S. LHC Communications U.S. LHC Users Organization (USLUO) Advisory Committee of CERN Users (ACCU) Atlas Fermilab

73

D0 Solenoid Upgrade Project: Vacuum Pumping Calculations for the D0 Solenoid  

SciTech Connect (OSTI)

This engineering note documents the calculations done to determine the vacuum pumping speed for the D-Zero solenoid. The raw calculations are attached. A summary of the results are listed. The vacuum pumping speed of the solenoid is determined by the conductance of the pumping path. At higher pressure ranges during initial pumpdown, the conductances will be rather high. Calculations were not done for the transient pumpdown period, only the steady state type pumping situation. The pressure is assumed to be on the order of 10E-7 torr. This is the free molecular flow regime based on Knudsen number. This pressure regime is also where the pumping speed would be least. The conductances were calculated based on pumping helium gas at a temperature of 300 Kelvin. The total conductance of the pumping path from the solenoid to the inlet of the turbomolecular pump is 11.8 L/s. The effective pumping speed of a 1000 L/s turbo pump attached to this pumping path is 11.7 L/s. The minimum required pumping speed for design purposes was set at 4.3 L/s. This value was arrived at by assuming a warm leak size (10E-8 atm-cc/sec) was not detected during fabrication of the solenoid. It is then assumed that the leak leaks cold liquid helium into the vacuum space. With this leak rate, a 4.3 L/s pumping speed would be able to maintain a 2 x 10E-7 torr pressure in the solenoid vacuum jacket. The solenoid would be able to be operated with this small leak with continuous pumping.

Rucinski, R.; /Fermilab

1993-08-02T23:59:59.000Z

74

Design of High Field Solenoids made of High Temperature Superconductors.  

E-Print Network [OSTI]

??This thesis starts from the analytical mechanical analysis of a superconducting solenoid, loaded by self generated Lorentz forces. Also, a finite element model is proposed… (more)

BARTALESI, ANTONIO

2009-01-01T23:59:59.000Z

75

A Compact and High Performance Muon Capture Channel for Muon Accelerators  

SciTech Connect (OSTI)

It is widely believed that a neutrino factory would deliver unparallel performance in studying neutrino mixing and would provide tremendous sensitivity to new physics in the neutrino sector. Here we will describe and simulate the front-end of the neutrino factory system, which plays critical role in determining the number of muons that can be accepted by the downstream accelerators. In this system, a proton bunch on a target creates secondaries that drift into a capture transport channel. A sequence of rf cavities forms the resulting muon beams into strings of bunches of differing energies, aligns the bunches to nearly equal central energies, and initiates ionization cooling. For this, the muon beams are transported through sections containing high-gradient cavities and strong focusing solenoids. In this paper we present results of optimization and variation studies toward obtaining the maximum number of muons for a neutrino factory by using a compact transport channel. It has been suggested computationally and experimentally that the maximum achievable gradient is enhanced by introducing an external magnetic field at right angles to the rf electric field since it suppresses field-emission processes. Here, we have discussed a possible scheme for extending the concept of magnetic insulation to capture, transport, and cool muons in a neutrino factory. We incorporated this idea into a new lattice design where the rf cavities are shaped so that their walls were tangential to the magnetic-field lines. We showed that, with magnetic insulation, the field-emitted electrons impact the cavity surface with energies four orders-of-magnitude less than in conventional pillbox cavities; consequently, damage from field-emission is suppressed significantly. While demanding in terms of power requirements, this neutrino factory lattice showed satisfactory performance in both cooling and collecting the accepted muons within the requirements for the IDSNF. Optimizations were also made to reduce heating on the absorber windows minimizing losses in the accepted muon fluxes. The next step for verifying these ideas should be an experimental demonstration of a single muon accelerator magnetically-insulated rf cavity. A successful demonstration will provide us with a new versatile tool for a future muon accelerator.

Stratakis, D.; Gallardo, J.; Palmer, R.B.

2011-03-28T23:59:59.000Z

76

U.S. CMS - U.S. CMS @ Work - Detector Maintenance and Operations Subproject  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

HCAL Announcements, Documentation, and Resources HCAL Announcements, Documentation, and Resources Forward Pixels SiTracker ECAL HCAL Endcap Muon System TriDAS (This page last updated August 2000, although the 1997 version of the TDR was added in July 2010.) [See also HCAL web pages at Maryland and Boston.] HCAL Review Documents HCAL Project Organization Chart (13 Kb gif file) [ps: 46 Kb] HCAL Meeting Announcements, Agendas, and Minutes HCAL Technical Design Report HCAL Drawings: 3-D and perspective barrel HCAL views. HCAL Trigger: Calorimeter trigger algorithm specifications. HCAL Display Resources: transparencies, misc. figures, ... HCAL Documents: Technical Proposal, DRDC Notes, and Papers. CMS Technical Notes: HCAL, HCAL-HV. HCAL Page on CMSDOC WWW Server at CERN HCAL HF Document Server from the University of Iowa

77

Atmospheric Muons and Neutrinos  

Science Journals Connector (OSTI)

......parameters to reproduce the observed muon energy spectrum in a certain zenithal...If we restrict ourselves to the muons of energy greater than, say, 5 GeV, we...parameters to reproduce the observed muon energy spectrum in a certain zenithal......

Masatoshi Koshiba

1969-03-01T23:59:59.000Z

78

Annual Report CMS Spring Assembly  

E-Print Network [OSTI]

Annual Report 2007-2008 CMS Spring Assembly & Length of Service Awards March 9, 2012 #12;Annual Report 2007-2008 News & Events: Alumni David Mearns (CMS MS `86) Selected as co-recipient of USF's Distinguished Alumni Award, Fall 2011 #12;Annual Report 2007-2008 News & Events: Faculty Dr. Robert Byrne

Meyers, Steven D.

79

CMS Grid CCS task  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

U.S. CMS S&C PMG U.S. CMS S&C PMG 1 Mark Leininger Fermilab Project Office Project Office Iowa (DOE): Iowa (DOE): $25K SOW for FY04 complete; PO placed $25K SOW for FY04 complete; PO placed Minnesota (DOE): Minnesota (DOE): $52K SOW for FY04 complete, requisition in division $52K SOW for FY04 complete, requisition in division Virginia Tech (DOE): Virginia Tech (DOE): $65K SOW for FY04 at VT for review $65K SOW for FY04 at VT for review UCD (DOE): UCD (DOE): SOW for FY04 being discussed by Bob Clare and Winston Ko SOW for FY04 being discussed by Bob Clare and Winston Ko CERN/NEU: CERN/NEU: $32K $32K changeorder changeorder for for Guilio Eulisse Guilio Eulisse for July for July - - Dec '04 Dec '04 Web redesign project: Web redesign project: PO placed, PO placed, strawman strawman page by Christmas

80

CMS FNAL Remote Operations Center  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

LHC@FNAL Remote Operations Center (ROC) at Fermilab is located on the first floor of Wilson Hall. From the ROC, shifters perform real-time monitoring of the data recorded by the CMS Experiment. LHC@FNAL Remote Operations Center (ROC) at Fermilab is located on the first floor of Wilson Hall. From the ROC, shifters perform real-time monitoring of the data recorded by the CMS Experiment. ROC WBM / WBM Twiki FNAL ELog Mailing List Agendas / ROC Presentations & Notes WBM Publications Runs CVS SiTracker / MTCC AEM / AEM help Screen Snapshot Service FAQ Accounts & Nodes New User Instructions WebCams CMS Workbook Directories / Glossaries Photos Vidyo / EVO Google / Wikipedia LHC@FNAL Computing Console Map Documents Mailing List One East Mtg Schedule rocshare Telephones To Do List Video Conferencing CMS Shifter CSC DAQ DataOps DQM / FNAL ROC ECAL Event Display HCAL Pixel Trigger Global Run Calendar CMS Live Contact List DAQ Status DAS

Note: This page contains sample records for the topic "muon solenoid cms" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Upgrade fo the CMS Hadron Outer Calorimeter with SIPMs  

SciTech Connect (OSTI)

The CMS Hadron Outer Calorimeter (HO) is undergoing an upgrade to replace the existing photodetectors (HPDs) with SIPMs. The chosen device is the Hamamatsu 3 x 3mm 50 {mu}m pitch MPPC. The system has been developed to be a 'drop-in' replacement of the HPDs. A complete control system of bias voltage generation, leakage current monitoring, temperature monitoring, and temperature control using solid state Peltier coolers has been developed and tested. 108 channels of the system have been installed into CMS and operated for more than 2 years. The complete system of about 2200 channels is in production and will be installed in the next LHC long shutdown scheduled for 2013. The CMS central calorimeter consists of a detector inside the solenoidal magnet, HB, and a component outside the magnet, the Outer Hadron Calorimeter, HO [1]. The HO is installed inside the magnet flux return yoke and provides for typically 3{lambda} of additional absorber to the calorimetric measurement. The outer calorimeter is composed of one or more layers of scintillator with wavelength shifting fiber readout into photodetectors. Figure 1 (a) shows the schematic layout of the calorimeters in CMS and shows the location of the HO scintillator layers. The front end electronics are placed inside the CMS detector, close to the scintillators. Figure 1(b) shows a photograph of the scintillators. Note the four wavelength shifting fibers per tile. The tile size creates a projective tower with the HB. Currently the photodetector used is the HPD but for performance and operational reasons it is desired to upgrade these with SIPMs. The CMS HCAL group has developed a drop-in replacement for the HPD using SIPMs. SIPMs are very suitable for this application because of several factors: The radiation levels are modest with a lifetime expected fluence of less than 5*10{sup 11} neutrons (E > 100 KeV) per cm{sup 2}. The energy flux into HO is small, the rate of larger energy depositions is low, and the required dynamic range is modest. The HO is in the return magnetic field of up to 2KG and the photodetector needs to operate in that environment. Finally, the available physical volume for the photodetectors is small.

Anderson, Jacob; Freeman, James; Los, Sergey; Whitmore, Juliana; /Fermilab

2011-09-14T23:59:59.000Z

82

Muon Front End for a Neutrino Factory and Muon Collider  

E-Print Network [OSTI]

Muon Front End for a Neutrino Factory and Muon Collider Chris Rogers, ASTeC, Rutherford Appleton Laboratory 15th January 2013 #12;High Energy Muon Facilities Growing interest in large, high energy muon facilities Neutrino Factory -> neutrino oscillations and Muon Collider -> energy frontier or Higgs factory

McDonald, Kirk

83

AN INTENSE LOW ENERGY MUON SOURCE FOR THE MUON COLLIDER  

E-Print Network [OSTI]

AN INTENSE LOW ENERGY MUON SOURCE FOR THE MUON COLLIDER D. Taqqu Paul Scherrer Institut, Villigen, CH Abstract A scheme for obtaining an intense source of low energy muons is described. It is based of the decay muons an intense intermediate energy muon beam is obtained. For the specific case of negative

McDonald, Kirk

84

G-2 and CMS Fast Optical Calorimetry  

SciTech Connect (OSTI)

Final report on CMS funding for the construction, tests and installation of the Forward Hadron Calorimeter.

Winn, David R

2012-08-07T23:59:59.000Z

85

Beam Dynamics Studies for the First Muon Linac of the Neutrino Factory  

SciTech Connect (OSTI)

Within the Neutrino Factory Project the muon acceleration process involves a complex chain of accelerators including a (single-pass) linac, two recirculating linacs and an FFAG. The linac consists of RF cavities and iron shielded solenoids for transverse focusing and has been previously designed relying on idealized field models. However, to predict accurately the transport and acceleration of a high emittance 30 cm wide beam with 10 % energy spread requires detailed knowledge of fringe field distributions. This article presents results of the front-to-end tracking of the muon beam through numerically simulated realistic field distributions for the shielded solenoids and the RF fields. Real and phase space evolution of the beam has been studied along the linac and the results are presented and discussed.

C. Bontoiu,M. Aslaninejad,J. Pozimski,Alex Bogacz

2010-05-01T23:59:59.000Z

86

MUON SCATTERING INTO 1-5 MUON FINAL STATES  

E-Print Network [OSTI]

MUON SCATTERING INTO1 - 5 MUON FINAL STATES Physics Depar~ment and Lawrenceof 209-GeV and 90-GeV muons within a magnetized~steel

Clark, A.R.

2010-01-01T23:59:59.000Z

87

ITER Central Solenoid Coil Insulation Qualification  

SciTech Connect (OSTI)

An insulation system for ITER Central Solenoid must have sufficiently high electrical and structural strength. Design efforts to bring stresses in the turn and layer insulation within allowables failed. It turned out to be impossible to eliminate high local tensile stresses in the winding pack. When high local stresses can not be designed out, the qualification procedure requires verification of the acceptable structural and electrical strength by testing. We built two 4x4 arrays of the conductor jacket with two options of the CS insulation and subjected the arrays to 1.2 million compressive cycles at 60 MPa and at 76 K. Such conditions simulated stresses in the CS insulation. We performed voltage withstand tests and after end of cycling we measured the breakdown voltages between in the arrays. After that we dissectioned the arrays and studied micro cracks in the insulation. We report details of the specimens preparation, test procedures and test results.

Martovetsky, Nicolai N [ORNL] [ORNL; Mann Jr, Thomas Latta [ORNL] [ORNL; Miller, John L [ORNL] [ORNL; Freudenberg, Kevin D [ORNL] [ORNL; Reed, Richard P [Cryogenic Materials, Inc.] [Cryogenic Materials, Inc.; Walsh, Robert P [Florida State University] [Florida State University; McColskey, J D [National Institute of Standards and Technology (NIST), Boulder] [National Institute of Standards and Technology (NIST), Boulder; Evans, D [Advanced Cryogenic Materials] [Advanced Cryogenic Materials

2010-01-01T23:59:59.000Z

88

ITER CENTRAL SOLENOID COIL INSULATION QUALIFICATION  

SciTech Connect (OSTI)

An insulation system for ITER Central Solenoid must have sufficiently high electrical and structural strength. Design efforts to bring stresses in the turn and layer insulation within allowables failed. It turned out to be impossible to eliminate high local tensile stresses in the winding pack. When high local stresses can not be designed out, the qualification procedure requires verification of the acceptable structural and electrical strength by testing. We built two 4 x 4 arrays of the conductor jacket with two options of the CS insulation and subjected the arrays to 1.2 million compressive cycles at 60 MPa and at 76 K. Such conditions simulated stresses in the CS insulation. We performed voltage withstand tests and after end of cycling we measured the breakdown voltages between in the arrays. After that we dissectioned the arrays and studied micro cracks in the insulation. We report details of the specimens preparation, test procedures and test results.

Martovetsky, N N; Mann, T L; Miller, J R; Freudenberg, K D; Reed, R P; Walsh, R P; McColskey, J D; Evans, D

2009-06-11T23:59:59.000Z

89

muon Collider Notes  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Muon Collider Notes Muon Collider Notes MC-001 D. Neuffer, "Colliding Muon Beams at 90 GeV" Fermilab Note FN-319, July 1979. MC-002 D. Neuffer, "Principles and Applications of Muon Cooling" Proc. of the 12th International Conf. on High-Energy Accelerators, p. 481, 1983. MC-003 V.V. Parkhomchuk and A.N. Skrinsky, "Ionization Cooling: Physics and Applications" Proc. of the 12th International Conf. on High-Energy Accelerators, p. 485, 1983. MC-004 E.A. Perevedentsev and A.N. Skrinsky, "On the Proton Klystron" Proc. of the 12th International Conf. on High-Energy Accelerators, p. 508, 1983. MC-005 D. Neuffer, "Principles and Applications of Muon Cooling" Particle Accelerators, Vol. 14, p. 75, 1983. MC-006 D. Neuffer, "Multi-TeV Muon Colliders" Proc. of the Advanced

90

Muon Cooling: Longitudinal Compression  

Science Journals Connector (OSTI)

A 10??MeV/c positive muon beam was stopped in helium gas of a few mbar in a magnetic field of 5 T. The muon “swarm” has been efficiently compressed from a length of 16 cm down to a few mm along the magnetic field axis (longitudinal compression) using electrostatic fields. The simulation reproduces the low energy interactions of slow muons in helium gas. Phase space compression occurs on the order of microseconds, compatible with the muon lifetime of 2???s. This paves the way for the preparation of a high-quality low-energy muon beam, with an increase in phase space density relative to a standard surface muon beam of 107. The achievable phase space compression by using only the longitudinal stage presented here is of the order of 104.

Yu Bao; Aldo Antognini; Wilhelm Bertl; Malte Hildebrandt; Kim Siang Khaw; Klaus Kirch; Angela Papa; Claude Petitjean; Florian M. Piegsa; Stefan Ritt; Kamil Sedlak; Alexey Stoykov; David Taqqu

2014-06-04T23:59:59.000Z

91

Muon Capture and Nuclear Structure  

Science Journals Connector (OSTI)

We have studied the fundamental muon-nucleon interaction from the muon capture in gaseous and molecular hydrogen and ... problem upon the knowledge of the former from muon captures in C12 and O16.

M. Morita; H. Ohtsubo; A. Fujii

1970-01-01T23:59:59.000Z

92

The Muon Accelerator Program  

SciTech Connect (OSTI)

Multi-TeV Muon Colliders and high intensity Neutrino Factories have captured the imagination of the particle physics community. These new types of facility both require an advanced muon source capable of producing O(10{sup 21}) muons per year. The muons must be captured within bunches, and their phase space manipulated so that they fit within the acceptance of an accelerator. In a Neutrino Factory (NF), muons from this 'front end' are accelerated to a few GeV or a few tens of GeV, and then injected into a storage ring with long straight sections. Muon decays in the straight sections produce an intense neutrino beam. In a Muon Collider (MC) the muons must be cooled by a factor O(10{sup 6}) to produce beams that are sufficiently bright to give high luminosity in the collider. Bunches of positive and negative muons are then accelerated to high energy, and injected in opposite directions into a collider ring in which they collide at one or more interaction points. Over the last decade our understanding of the concepts and technologies needed for Muon Colliders and Neutrino Factories has advanced, and it is now believed that, within a few years, with a well focused R&D effort (i) a Neutrino Factory could be proposed, and (ii) enough could be known about the technologies needed for a Muon Collider to assess the feasibility and cost of this new type of facility, and to make a detailed plan for the remaining R&D. Although these next NF and MC steps are achievable, they are also ambitious, and will require an efficient and dedicated organization to accomplish the desired goals with limited resources. The Muon Accelerator Program (MAP) has recently been created to propose and execute this R&D program.

Geer, Steve; /Fermilab; Zisman, Mike; /LBL, Berkeley

2011-08-01T23:59:59.000Z

93

Rare muon processes  

SciTech Connect (OSTI)

The status of rare muon processes as tests of the standard model is reviewed with the emphasis on results that are expected from experiments in the near future.

Cooper, M.D.; The MEGA Collaboration

1993-05-01T23:59:59.000Z

94

Rare muon processes  

SciTech Connect (OSTI)

The status of rare muon processes as tests of the standard model is reviewed with the emphasis on results that are expected from experiments in the near future.

Cooper, M.D.

1993-01-01T23:59:59.000Z

95

Note: A simple model for thermal management in solenoids  

SciTech Connect (OSTI)

We describe a model of the dynamical temperature evolution in a solenoid winding. A simple finite element analysis is calibrated by accurately measuring the thermally induced resistance change of the solenoid, thus obviating the need for accurate knowledge of the mean thermal conductivity of the windings. The model predicts quasi thermal runaway for relatively modest current increases from the normal operating conditions. We demonstrate the application of this model to determine the maximum current that can be safely applied to solenoids used for helium spin-echo measurements.

McIntosh, E. M., E-mail: emb56@cam.ac.uk; Ellis, J. [The Cavendish Laboratory, JJ Thomson Avenue, Cambridge CB3 0HE (United Kingdom)] [The Cavendish Laboratory, JJ Thomson Avenue, Cambridge CB3 0HE (United Kingdom)

2013-11-15T23:59:59.000Z

96

EA-223 CMS Marketing, Services and Trading Company | Department...  

Broader source: Energy.gov (indexed) [DOE]

3 CMS Marketing, Services and Trading Company EA-223 CMS Marketing, Services and Trading Company Order authorizing CMS Marketing, Services and Trading Company to export electric...

97

EA-223-A CMS Marketing, Services and Trading Company | Department...  

Broader source: Energy.gov (indexed) [DOE]

3-A CMS Marketing, Services and Trading Company EA-223-A CMS Marketing, Services and Trading Company Order authorizing CMS Marketing, Services and Trading Company to export...

98

MagLab - Magnetic Field of a Solenoid Tutorial  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Magnetic Field of a Solenoid This is a Java tutorial, which requires that you have Java, a free software, installed on your computer. It works best if you have the latest version...

99

The Upgrade of the CMS RPC System during the First LHC Long Shutdown  

E-Print Network [OSTI]

The CMS muon system includes in both the barrel and endcap region Resistive Plate Chambers (RPC). They mainly serve as trigger detectors and also improve the reconstruction of muon parameters. Over the years, the instantaneous luminosity of the Large Hadron Collider gradually increases. During the LHC Phase 1 (~first 10 years of operation) an ultimate luminosity is expected above its design value of 10^34/cm^2/s at 14 TeV. To prepare the machine and also the experiments for this, two long shutdown periods are scheduled for 2013-2014 and 2018-2019. The CMS Collaboration is planning several detector upgrades during these long shutdowns. In particular, the muon detection system should be able to maintain a low-pT threshold for an efficient Level-1 Muon Trigger at high particle rates. One of the measures to ensure this, is to extend the present RPC system with the addition of a 4th layer in both endcap regions. During the first long shutdown, these two new stations will be equipped in the region |eta|control procedures.

M. Tytgat; A. Marinov; P. Verwilligen; N. Zaganidis; A. Aleksandrov; V. Genchev; P. Iaydjiev; M. Rodozov; M. Shopova; G. Sultanov; Y. Assran; M. Abbrescia; C. Calabria; A. Colaleo; G. Iaselli; F. Loddo; M. Maggi; G. Pugliese; L. Benussi; S. Bianco; M. Caponero; S. Colafranceschi; F. Felli; D. Piccolo; G. Saviano; C. Carrillo; U. Berzano; M. Gabusi; P. Vitulo; M. Kang; K. S. Lee; S. K. Park; S. Shin; A. Sharma

2012-09-10T23:59:59.000Z

100

Muon collider gains momentum  

Science Journals Connector (OSTI)

... , US scientists staked their claim in a daring new venture: the world's first muon collider. The collider could overtake two more-mature concepts, each of which plan to ... expected to achieve. They are now trying to rally enthusiasm for a collider that smashes muons, a particle that is about 200 times more massive than the electron. ...

Eric Hand

2009-11-18T23:59:59.000Z

Note: This page contains sample records for the topic "muon solenoid cms" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Muon spin rotation  

Science Journals Connector (OSTI)

... vast funding accorded high energy physics research in recent years.?SR-the acronym stands for Muon Spin Rotation, Relaxation, Resonance, Research or what have you, and refers to the ... the most promising new work related to purely chemical problems. Indeed, the use of muons in chemistry is striking not only for providing yet another probe of chemical systems, ...

G. C. Stirling

1978-11-23T23:59:59.000Z

102

Muon Decay Deep Underground  

Science Journals Connector (OSTI)

A measurement of delayed coincidences characteristic of muon decay has been made at a depth of 1440-hg/cm2 standard rock with a 200-liter liquid scintillation detector. These results are consistent with the decay rate predicted from the depth-intensity curve for the penetrating component of the cosmic rays, providing independent evidence that this component is energetic muons.

W. R. Kropp; Jr.; F. Reines; R. M. Woods; Jr.

1968-06-17T23:59:59.000Z

103

Muons and Neutrinos 2007  

E-Print Network [OSTI]

This paper is the written version of the rapporteur talk on Section HE-2, muons and neutrinos, presented at the 30th International Cosmic Ray Conference, Merida, Yucatan, July 11, 2007. Topics include atmospheric muons and neutrinos, solar neutrinos and astrophysical neutrinos as well as calculations and instrumentation related to these topics.

Thomas K. Gaisser

2008-01-29T23:59:59.000Z

104

OVERVIEW OF A MUON CAPTURE SECTION FOR MUON ACCELARATORS*  

E-Print Network [OSTI]

OVERVIEW OF A MUON CAPTURE SECTION FOR MUON ACCELARATORS* Diktys Stratakis# , J. Scott Berg, H Snopok, Illinois Institute of Technology, Chicago, IL, USA Abstract We describe a muon capture section to manipulate the longitudinal and transverse phase-space to collect efficiently a muon beam produced from

McDonald, Kirk

105

SolenoidSolenoid--free Startfree Start--up and Rampup and Ramp--upup Progress and Plans for 2009Progress and Plans for 2009--1313  

E-Print Network [OSTI]

in solenoid-free plasma startup research · NSTX has so far explored CHI and Outer PF startup for plasma

Princeton Plasma Physics Laboratory

106

Dose from slow negative muons  

Science Journals Connector (OSTI)

......radiation with emphasis on low energy muons are scarce. Pelliccioni(7...for incoming 1 and 10 MeV muons. Muon energy 1 MeV 10 MeV H*(10)/phi...scoring volume dimensions. When the muon energy increases to 10 MeV, they penetrate......

T. Siiskonen

2008-01-01T23:59:59.000Z

107

The Neutrino Factory and Muon Collider Collaboration MERIT 15-T Pulsed Solenoid Magnet  

E-Print Network [OSTI]

insulation. · Ice buildup on magnet connections. · Liquefaction of oxygen. · LN2 filling and draining. Kirk T

McDonald, Kirk

108

Muon Collider Progress: Accelerators  

SciTech Connect (OSTI)

A muon collider would be a powerful tool for exploring the energy-frontier with leptons, and would complement the studies now under way at the LHC. Such a device would offer several important benefits. Muons, like electrons, are point particles so the full center-of-mass energy is available for particle production. Moreover, on account of their higher mass, muons give rise to very little synchrotron radiation and produce very little beamstrahlung. The first feature permits the use of a circular collider that can make efficient use of the expensive rf system and whose footprint is compatible with an existing laboratory site. The second feature leads to a relatively narrow energy spread at the collision point. Designing an accelerator complex for a muon collider is a challenging task. Firstly, the muons are produced as a tertiary beam, so a high-power proton beam and a target that can withstand it are needed to provide the required luminosity of ~1 × 10{sup 34} cm{sup –2}s{sup –1}. Secondly, the beam is initially produced with a large 6D phase space, which necessitates a scheme for reducing the muon beam emittance (“cooling”). Finally, the muon has a short lifetime so all beam manipulations must be done very rapidly. The Muon Accelerator Program, led by Fermilab and including a number of U.S. national laboratories and universities, has undertaken design and R&D activities aimed toward the eventual construction of a muon collider. Design features of such a facility and the supporting R&D program are described.

Zisman, Michael S.

2011-09-10T23:59:59.000Z

109

The Muon Collider  

SciTech Connect (OSTI)

We describe the scientific motivation for a new type of accelerator, the muon collider. This accelerator would permit an energy-frontier scientific program and yet would fit on the site of an existing laboratory. Such a device is quite challenging, and requires a substantial R&D program. After describing the ingredients of the facility, the ongoing R&D activities of the Muon Accelerator Program are discussed. A possible U.S. scenario that could lead to a muon collider at Fermilab is briefly mentioned.

Zisman, Michael S

2010-05-17T23:59:59.000Z

110

Muon g-2  

E-Print Network [OSTI]

The muon g-2 collaboration has measured the anomalous magnetic g value of the positive muon to within a relative uncertainty of 0.7 parts per million. The result, a_{\\mu^+} = 11 659 204(7)(5) x 10^{-10} is in good agreement with the preceding data on a_{\\mu^+} and a_{\\mu^-} and has about twice smaller uncertainty. The measurement tests standard model theory, which at the level of the experimental uncertainty involves quantum electrodynamics, quantum chromodynamics, and electroweak interaction in significant ways. The analysis of the anomalous magnetic g value of the negative muon is well underway.

Ernst Sichtermann; for the g-2 collaboration

2003-09-02T23:59:59.000Z

111

Fermilab | Muon Collider | How Does a Muon Collider Work?  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

A muon collider complex would comprise several machines and many different A muon collider complex would comprise several machines and many different components. Scientists across the world are developing and testing them. View full graphic How Does a Muon Collider Work? A muon collider complex would comprise several machines and many different components. Scientists across the world are developing and testing them. Proton accelerator To create lots of muons, scientists use a high-intensity proton accelerator that steers protons into a target. The collisions create short-lived particles called pions. Within 50 meters the pions decay into muons and neutral particles called neutrinos. The muons have an energy of about 200 MeV. Capture cavities Magnets guide the muons into and through a set of radiofrequency cavities. The electric field inside the cavities increases the energy of slow muons

112

The focusing properties of the positron-capture solenoidal lens  

SciTech Connect (OSTI)

This note concerns the focusing properties of the positron-capture solenoid. Such a solenoid will be placed before the entrance of the 450 MeV positron linear-accelerator injector in the APS. The 1.25 A, 40 ns electron beam is accelerated in the 200 MeV electron linac. This beam is then focused onto a 3 mm diameter spot at the 7 mm thick tungsten target. By the process of multiple nuclear-scattering the target generates the positron particles. These positrons, in general, can have a large diverging angle. In order to capture these rapidly diverging positrons, a relatively strong focusing lens is placed close to the converter. In this case a magnetic solenoidal lens has an advantage over the usual quadrupole lens because of its larger phase-space acceptance. In particular, the solenoidal lens is noted for its capability of controlling the spin direction of polarized ions. The authors first wrote down the expression for the magnetic field distribution on the axis for the solenoidal lens. From this expression they derive the expressions for the first- and second-order field distributions at any point in the region. They then calculate and compare the focal powers at various distances off the axis. Further, they calculate and include the third- and fourth-order components of the fields and compare them with the previous results. Finally, they briefly consider the particle trajectories through these fields and present the result in terms of the particle motion in phase space.

Yoon, M.; Mavrogenes, G.

1988-06-01T23:59:59.000Z

113

Muon-proton Scattering  

E-Print Network [OSTI]

A recent proposal to measure the proton form factor by means of muon-proton scattering will use muons which are not ultrarelativistic (and also not nonrelativistic). The usual equations describing the scattering cross section use the approximation that the scattered lepton (usually an electron) is ultrarelativistic, with v/c approximately equal to 1. Here the cross section is calculated for all values of the energy. It agrees with the standard result in the appropriate limit.

E. Borie

2012-07-24T23:59:59.000Z

114

Towards a Muon Collider  

SciTech Connect (OSTI)

A multi TeV Muon Collider is required for the full coverage of Terascale physics. The physics potential for a Muon Collider at {approx}3 TeV and integrated luminosity of 1 ab{sup -1} is outstanding. Particularly strong cases can be made if the new physics is SUSY or new strong dynamics. Furthermore, a staged Muon Collider can provide a Neutrino Factory to fully disentangle neutrino physics. If a narrow s-channel resonance state exists in the multi-TeV region, the physics program at a Muon Collider could begin with less than 10{sup 31} cm{sup -2} s{sup -1} luminosity. Detailed studies of the physics case for a 1.5-4 TeV Muon Collider are just beginning. The goals of such studies are to: (1) identify benchmark physics processes; (2) study the physics dependence on beam parameters; (3) estimate detector backgrounds; and (4) compare the physics potential of a Muon Collider with those of the ILC, CLIC and upgrades to the LHC.

Eichten, E.; /Fermilab

2011-08-01T23:59:59.000Z

115

Muon Identification in the ATLAS Calorimeters  

E-Print Network [OSTI]

Muon Identification in the ATLAS Calorimeters #12;#12;Muon Identification in the ATLAS Calorimeters . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 2.2.3 Muon spectrometer . . . . . . . . . . . . . . . . . . . . . . . . . . 28 2.2.4 The forward . . . . . . . . . . . . . . . . . . . . . . . . . . 30 2.2.6 The trigger system . . . . . . . . . . . . . . . . . . . . . . . . . . 31 3 Muon

van Suijlekom, Walter

116

Tapered Six-Dimensional Cooling Channel for a Muon Collider  

SciTech Connect (OSTI)

A high-luminosity muon collider requires a reduction of the six-dimensional emittance of the captured muon beam by a factor of {approx} 10{sup 6}. Most of this cooling takes place in a dispersive channel that simultaneously reduces all six phase space dimensions. We describe a tapered 6D cooling channel that should meet the requirements of a muon collider. The parameters of the channel are given and preliminary simulations are shown of the expected performance. A complete scheme for cooling a muon beam sufficiently for use in a muon collider has been previously described. This scheme uses separate 6D ionization cooling channels for the two signs of the particle charge. In each, a channel first reduces the emittance of a train of muon bunches until they can be injected into a bunch-merging system. The single muon bunches, one of each sign, are then sent through a second tapered 6D cooling channel where the transverse emittance is reduced as much as possible and the longitudinal emittance is cooled to a value below that needed for the collider. The beam can then be recombined and sent through a final cooling channel using high-field solenoids that cools the transverse emittance to the required values for the collider while allowing the longitudinal emittance to grow. This paper mainly describes the design of the 6D cooling channel before bunch merging. Cooling efficiency is conveniently measured using a parameter Q, which is defined as the rate of change of 6D emittance divided by the rate of change of the number of muons in the beam. In a given lattice Q starts off small due to losses from initial matching, then rises to a large value (Q {approx} 15 is typical for the channels discussed here), and finally falls as the emittance of the beam approaches its equilibrium value. The idea for the 6D cooling channel described here originated with the RFOFO cooling ring. This design evolved into a helical channel referred to as a 'Guggenheim' in order to avoid serious problems with injection of large emittance beams. We found that good cooling efficiency requires that the channel be tapered. In that case when Q starts to fall off the lattice is modified to reduce the beta function. This ensures that the beam emittance is always large compared with the equilibrium emittance.

Palmer, R.B.; Fernow, R.C.

2011-03-28T23:59:59.000Z

117

Progress on a Cavity with Beryllium Walls for Muon Ionization Cooling Channel R&D.  

SciTech Connect (OSTI)

The Muon Accelerator Program (MAP) collaboration is working to develop an ionization cooling channel for muon beams. An ionization cooling channel requires the operation of high-gradient, normal-conducting RF cavities in multi-Tesla solenoidal magnetic fields. However, experiments conducted at Fermilab?s MuCool Test Area (MTA) show that increasing the solenoidal field strength reduces the maximum achievable cavity gradient. This gradient limit is characterized by an RF breakdown process that has caused significant damage to copper cavity interiors. The damage may be caused by field-emitted electrons, focused by the solenoidal magnetic field onto small areas of the inner cavity surface. Local heating may then induce material fatigue and surface damage. Fabricating a cavity with beryllium walls would mitigate this damage due to beryllium?s low density, low thermal expansion, and high electrical and thermal conductivity. We address the design and fabrication of a pillbox RF cavity with beryllium walls, in order to evaluate the performance of high-gradient cavities in strong magnetic fields.

Bowring, D.L.; DeMello, A.J.; Lambert, A.R.; Li, D.; Virostek,, S.; Zisman, M.; Kaplan, D.; Palmer, R.B.

2012-05-20T23:59:59.000Z

118

Contribution of prompt muon production to total muon fluxes  

Science Journals Connector (OSTI)

The flux of prompt cosmic-ray muons coming from charmed particles which are produced ... compare the observed results on angular distributions of muon intensities at a given depth with the ... . There is no clear...

H. Inazawa; K. Kobayakawa; T. Kitamura

119

Underground muon energy spectrum and its relevance for muon astronomy  

Science Journals Connector (OSTI)

A striking result from the NUSEX (1) and SOUDAN (2...) experiments is the discovery of a high flux of muons from the direction of Cygnus X-3 ... source. The differential energy spectrum of these muons is much fla...

A. Castellina; B. D’Ettorre Piazzoli; G. Mannocchi…

1985-11-16T23:59:59.000Z

120

Muon spectrum and convoy effects after muon-catalyzed fusion  

Science Journals Connector (OSTI)

We study final-state interactions of the muon after muon-catalyzed D-T fusion reaction with the ? particle and with target matter. The yield of convoy muons, traveling with the ? particle but remaining unbound is calculated. Energy loss in the dense target may lead to capture of a fraction of these muons into outer shells of the ? particle. We show that the final capture probability can be strongly density dependent.

B. Müller; H. E. Rafelski; J. Rafelski

1989-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "muon solenoid cms" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Muon Identification at the Tevatron  

Science Journals Connector (OSTI)

The muon detection and identification schemes for the CDF ... Fermilab Tevatron are described. Both experiments detect muons through the use of scintillation counters and ... surrounding a central tracker. Three ...

2006-01-01T23:59:59.000Z

122

Radiative muon capture  

Science Journals Connector (OSTI)

It is shown by relating the transition amplitude of radiative muon capture to that of radiative pion capture, that the transition amplitude of radiative muon capture proposed recently by Hwang and Primakoff differs from the others mainly by Low's counter terms. Despite the fact that the "original" transition amplitude does not violate seriously the conservation of the hadronic electromagnetic current, Low's counter terms, as introduced via Low's prescription to secure the presence of small conservation-of-hadronic-electromagnetic-current-breaking terms, are confirmed to be of numerical importance. Further, it is found in the "elementary-particle" treatment of radiative muon capture that the uncertainty arising from the nuclear structure can be reduced to become negligible. Therefore, an exclusive radiative muon capture experiment can in principle differentiate the Hwang-Primakoff theory from the others and yet provide a comprehensive test of partial conservation of axial-vector current.RADIOACTIVITY Theories of radiative muon capture, linearity hypothesis versus Low's prescription; nuclear structure and PCAC.

W -Y. P. Hwang

1980-07-01T23:59:59.000Z

123

Beam Dynamical Evolutions in a Solenoid Channel: A Review  

E-Print Network [OSTI]

Today a linear particle accelerator (linac), in which electric and magnetic fields are of vital importance, is one of the popular energy generation sources like Accelerator Driven System (ADS). A multipurpose, including primarily ADS, proton linac with energy of ~2 GeV is planned to constitute within the Turkish Accelerator Center (TAC) project collaborated by more than 10 Turkish universities. A Low Energy Beam Transport (LEBT) channel with two solenoids is a subcomponent of this linac. This solenoid channel transports the proton beam ejected by a proton source, and matches it with the Radio Frequency Quadrupole (RFQ) that is a subcomponent just after the LEBT. These solenoid magnets are used as focusing element to get the beam divergence and emittance growth under control. This paper includes settings of the LEBT solenoids with regard to beam dynamics, which investigates the beam particles motion in particle accelerators, for TAC proton linac done by using a beam dynamics simulation code PATH MANAGER. Furthermore, the simulation results have been interpreted analytically.

H. F. Kisoglu; M. Yilmaz

2014-06-16T23:59:59.000Z

124

U.S. CMS - U.S. CMS @ Work - Doing Physics - User Software & Computing -  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Setup : Software Setup Setup : Software Setup General CMS Software Environment Platform specific setup Application runtime environment Accessing CERN CVS server References General CMS Software Environment The CMS software environment for csh and tcsh users is set by sourcing the environment setup script. In tcsh, csh: source /uscmst1/prod/sw/cms/cshrc [option] In bash, sh: . /uscmst1/prod/sw/cms/shrc [option] This will set general CMS software environment variables, extend the user's $PATH to include CMS specific utilities and tools, and define aliases used in the CMS software projects. User can set one of the environments by choosing the corresponding argument to the environment setup script. NOTE: if environment is already set, sourcing a script will not change the environment. A warning will be

125

The CMS Journey to LHC Physics  

ScienceCinema (OSTI)

An overview of the design, the construction and physics of CMS will be given. A history of construction, encompassing the R&D; and challenges faced over the last decade and a half, will be recalled using selected examples. CMS is currently in the final stages of installation and commissioning is gathering pace. After a short status report of where CMS stands today some of the expected (great) physics to come will be outlined. * Tea & coffee will be served at 16:00.

None

2011-10-06T23:59:59.000Z

126

U.S. CMS - U.S. CMS @ Work - Safety  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Electromagnetic Calorimeter Institution Board Electromagnetic Calorimeter Institution Board Ren-yuan Zhu, Chair Caltech Renyuan Zhu zhu@hep.caltech.edu Cornell Ritchie Paterson ritchie@lepp.cornell.edu Fermilab Jeffrey Berryhill berryhil@fnal.gov Florida State Yuri Gershtein gerstein@hep.fsu.edu Kansas State Yurii Maravin maravin@fnal.gov Minnesota Roger Rusack rusack@mnhep.hep.umn.edu Northeastern Steve Reucroft reucroft@neu.edu Notre Dame Colin Jessop jessop@slac.stanford.edu Princeton Pierre Piroue piroue@princeton.edu Virginia Brad Cox cox@uvahep.phys.virginia.edu U.S. CMS is supported by the U.S. Department of Energy U.S. Department of

127

Available on CMS information server CMS CR 2006/0044 29th August 2006  

E-Print Network [OSTI]

in 36 countries. 2. CMS detector assembly overview The CMS experimental cavern (Fig. 2) is now) will be in the cavern by Christmas 2006. All detector elements will be in place by early February 2007. Installation-00141597,version1-13Apr2007 #12;Figure 2. Main CMS cavern, ready to receive the detector Figure 3. Heavy lifting

Paris-Sud XI, Université de

128

Muon capture in hydrogen  

E-Print Network [OSTI]

Theoretical difficulties in reconciling the measured rates for ordinary and radiative muon capture are discussed, based on heavy-baryon chiral perturbation theory. We also examine ambiguity in our analysis due to the formation of p$\\mu$p molecules in the liquid hydrogen target.

S. Ando; F. Myhrer; K. Kubodera

2001-10-30T23:59:59.000Z

129

Majorons and muon decay  

Science Journals Connector (OSTI)

The existence of a massless Goldstone boson coupling to neutrinos in theories with spontaneous violation of a global B-L symmetry may be consequential in precision measurements of the parameters in muon decay. We calculate the decay parameters for ??eMM, where the Majoron M is the Goldstone boson, and discuss limits on the Majoron-neutrino coupling.

T. Goldman; Edward W. Kolb; G. J. Stephenson; Jr.

1982-11-01T23:59:59.000Z

130

Evidence for a Higgs boson in tau decays with the CMS detector  

E-Print Network [OSTI]

In this thesis, I describe the search for a Higgs boson through its decay to a pair of tan leptons with the tau-pair subsequently decaying to ail electron, a muon, and neutrinos. The search is performed using data collected from proton-proton collisions by the Compact Muon Solenoid experiment at the Large Hadron Collider, corresponding to 5.0 fb-1 of integrated luminosity recorded at a center-of-mass energy of 7 TeV and 19.7 fb-1 at 8 TeV. The expected significance for a Standard Model Higgs boson signal with a mass of 125 GeV is at the level of 1.2 standard deviations for the electron muon tau-pair decay mode. A mild excess of events is seen above the SM background expectation in this decay mode, consistent with a SM Higgs boson of mass 125 GeV. In combination with results using other tau-pair decay modes, an excess of events above the background expectation is seen at the level of 3.4 standard deviations. This constitutes the first evidence for a Higgs boson to decay to leptons. This thesis also describes a...

Dutta, Valentina

131

Measurement of the Muon Charge Asymmetry in Inclusive pp ? W + X Production at ?s = 7 TeV and an Improved Determination of Light Parton Distribution Functions  

E-Print Network [OSTI]

Measurements of the muon charge asymmetry in inclusive pp ? W + X production at ?s = 7??TeV are presented. The data sample corresponds to an integrated luminosity of 4.7??fb[superscript ?1] recorded with the CMS detector ...

Apyan, Aram

132

Muon Experiments Masaharu Aoki, Osaka University  

E-Print Network [OSTI]

Muon Experiments Masaharu Aoki, Osaka University NP02 International workshop on Nuclear and Particle Physics at 50-GeV PS Kyoto #12;_ The muon is the best place to search for new physics beyond the Standard Model. ­ Muon LFV Forbidden Process ­ Muon EDM Suppressed Process ­ Muon g-2 Precise Measurement

Roberts, B. Lee

133

CMS: Present status, limitations, and upgrade plans  

SciTech Connect (OSTI)

An overview of the CMS upgrade plans will be presented. A brief status of the CMS detector will be given, covering some of the issues we have so far experienced. This will be followed by an overview of the various CMS upgrades planned, covering the main motivations for them, and the various R&D efforts for the possibilities under study. The CMS detector has been working extremely well since the start of data-taking at the LHC as is evidenced by the numerous excellent results published by CMS and presented at this workshop and recent conferences. Less well documented are the various issues that have been encountered with the detector. In the spirit of this workshop I will cover some of these issues with particular emphasis on problems that motivate some of the upgrades to the CMS detector for this decade of data-taking. Though the CMS detector has been working extremely well and expectations are great for making the most of the LHC luminosity, there have been a number of issues encountered so far. Some of these have been described and while none currently presents a problem for physics performance, some of them are expected to become more problematic, especially at the highest Phase 1 luminosities for which the majority of the integrated luminosity will be collected. These motivate upgrades for various parts of the CMS detector so that the current excellent physics performance can be maintained or even surpassed in the realm of the highest Phase 1 luminosities.

Cheung, H.W.K.; /Fermilab; ,

2011-09-01T23:59:59.000Z

134

The Design and Construction of the MICE Spectrometer Solenoids  

SciTech Connect (OSTI)

The purpose of the MICE spectrometer solenoid is to provide a uniform field for a scintillating fiber tracker. The uniform field is produced by a long center coil and two short end coils. Together, they produce 4T field with a uniformity of better than 1% over a detector region of 1000 mm long and 300 mm in diameter. Throughout most of the detector region, the field uniformity is better than 0.3%. In addition to the uniform field coils, we have two match coils. These two coils can be independently adjusted to match uniform field region to the focusing coil field. The coil package length is 2544 mm. We present the spectrometer solenoid cold mass design, the powering and quench protection circuits, and the cryogenic cooling system based on using three cryocoolers with re-condensers.

Wang, Bert; Wahrer, Bob; Taylor, Clyde; Xu, L.; Chen, J. Y.; Wang, M.; Juang, Tiki; Zisman, Michael S.; Virostek, Steve P.; Green, Michael A.

2008-08-02T23:59:59.000Z

135

Estimating the cost of large superconducting thin solenoid magnets  

SciTech Connect (OSTI)

The cost of thin superconducting solenoid magnets can be estimated if one knows the magnet stored energy, the magnetic field volume product or the overall mass of the superconducting coil and its cryostat. This report shows cost data collected since 1979 for large superconducting solenoid magnets used in high energy physics. These magnets are characterized in most cases by the use of indirect two phase helium cooling and a superconductor stabilizer of very pure aluminum. This correlation can be used for making a preliminary cost estimate of proposed one of a kind superconducting magnets. The magnet costs quoted include the power supply and quench protection system but the cost of the helium refrigerator and helium distribution system is not included in the estimated cost.

Green, M.A. [Lawrence Berkeley Lab., CA (United States); St. Lorant, S.J. [Stanford Linear Accelerator Center, Menlo Park, CA (United States)

1993-07-01T23:59:59.000Z

136

U.S. CMS - 2009 News Archive  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

9 News Archive 9 News Archive In This Section: CMS in the News Press Releases Press Kit CMS Result of the Month Other News Sources: US LHC Interactions.org U.S. CMS Past News Archives: 2012 News Archive 2011 News Archive 2010 News Archive 2009 News Archive 2008 News Archive 2007 News Archive Current news archive December 18, 2009 Interactions News Wire LHC ends 2009 run on a high note December 18, 2009 ABC News Big Bang Collider sets new record December 16, 2009 symmetry breaking Burst of LHC collision data a welcome birthday gift December 11, 2009 Fermilab Today CMS Result of the Month: Simply smashing December 9, 2009 New York Times Collider sets record, and Europe takes U.S.'s lead December 9, 2009 Fermilab Today CMS says hello to the π0 January 2010 Vanity Fair The Genesis 2.0 Project December 7, 2009

137

Refrigerator and Solenoid Run Summary August/September 1999  

SciTech Connect (OSTI)

The helium refrigerator was cooled down and operated for the third time since its installation. D-Zero's 2 Tesla superconducting solenoid was cooled down and operated for its second time since its installation into the D-Zero detector. This engineering note summarizes the cryogenic aspects of the test run and performance measurements made. The main purpose of this run was to do field mapping of the solenoid with different combinations of field polarity on the Solenoid and CF iron magnets. This was accomplished. A second purpose was to test the lower field joint repair that was done in January 1999. This field joint had a measurable voltage drop across the soldered bus splice. The repair was an undoing of the joint, extensive cleaning of the bus, and then welding the splice. The repair was successful, no voltage drop was measured and the magnet behaved nicely. A parasitic purpose was to get some operating time on the refrigerator, measure the refrigeration performance, and measure the heat leak in the VLPC lines mounted on the detector platform. Refrigerator performance was spot checked, and was found to be 60 watts (10%) less than generic operating curves. At this level of performance, the operating margin for the full solenoid and VLPC system will be 75 watts (15%) which is somewhat uncomfortable from an operational stand point. The VLPC lines were operated and heat leak numbers of around 40 watts was measured for each pipe section including the supply u-tubes to the detector, the bayonet can, valve box on the platform and the piping back to the refrigerator valve box. Another purpose of the test run was to test the compatibility of other detector components with the new central magnetic field environment. I do not know the results of these tests.

Rucinski, R.; /Fermilab

1999-09-20T23:59:59.000Z

138

First Generation Final Focusing Solenoid For NDCX-I  

SciTech Connect (OSTI)

This report describes the prototype final focus solenoid (FFS-1G), or 1st generation FFS. In order to limit eddy currents, the solenoid winding consists of Litz wire wound on a non-conductive G-10 tube. For the same reason, the winding pack was inserted into an electrically insulating, but thermally conducting Polypropylene (Cool- Poly© D1202) housing and potted with highly viscous epoxy (to be able to wick the single strands of the Litz wire). The magnet is forced-air cooled through cooling channels. The magnet was designed for water cooling, but he cooling jacket cracked, and therefore cooling (beyond natural conduction and radiation) was exclusively by forced air. Though the design operating point was 8 Tesla, for the majority of running on NDCX-1 it operated up to about 5 Tesla. This was due mostly from limitations of voltage holding at the leads, where discharges at higher pulsed current damaged the leads. Generation 1 was replaced by the 2nd generation solenoid (FFS-2G) about a year later, which has operated reliably up to 8 Tesla, with a better lead design and utilizes water cooling. At this point, FFS-1G was used for plasma source R&D by LBNL and PPPL. The maximum field for those experiments was reduced to 3 Tesla due to continued difficulty with the leads and because higher field was not essential for those experiments. The pulser for the final focusing solenoid is a SCR-switched capacitor bank which produces a half-sine current waveform. The pulse width is ~800us and a charge voltage of 3kV drives ~20kA through the magnet producing ~8T field.

Seidl, P. A.; Waldron, W.

2011-11-09T23:59:59.000Z

139

Superconducting ohmic heating solenoid concept for ISX-C  

SciTech Connect (OSTI)

The employment of a superconducting ohmic heating solenoid is presented for ISX-C based on currently available superconducting technology. The magnet is designed to be cryostable and to generate the required flux swing of 4.5 V/s while simultaneously meeting the limitations imposed by available space and structural interfacing to the torroidal coils. A novel spliceless pancake winding scheme is proposed which offers excellent cooling and completely supports the cable conductor throughout the winding.

Shen, S.S.; Brown, R.L.; Gray, W.H.; Lubell, M.S.

1981-01-01T23:59:59.000Z

140

Muon capture for the front end of a muon collider  

SciTech Connect (OSTI)

We discuss the design of the muon capture front end for a {mu}{sup +}-{mu}{sup -} Collider. In the front end, a proton bunch on a target creates secondary pions that drift into a capture transport channel, decaying into muons. A sequence of rf cavities forms the resulting muon beams into strings of bunches of differing energies, aligns the bunches to (nearly) equal central energies, and initiates ionization cooling. The muons are then cooled and accelerated to high energy into a storage ring for high-energy high luminosity collisions. Our initial design is based on the somewhat similar front end of the International Design Study (IDS) neutrino factory.

Neuffer, D.; /Fermilab; Yoshikawa, C.; /MUONS Inc., Batavia

2011-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "muon solenoid cms" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Muon-Muon and Other High Energy Colliders  

Science Journals Connector (OSTI)

Before we discuss the muon collider in detail, it is useful to...(pp, $$p\\bar p$$ ), of lepton (e + e ...

R. B. Palmer; J. C. Gallardo

1997-01-01T23:59:59.000Z

142

Muon Collider design status  

SciTech Connect (OSTI)

Muon Collider (MC) - proposed by G.I. Budker and A.N. Skrinsky a few decades ago - is now considered as the most exciting option for the energy frontier machine in the post-LHC era. A national Muon Accelerator Program (MAP) is being formed in the USA with the ultimate goal of building a MC at the Fermilab site with c.o.m. energy in the range 1.5-3 TeV and luminosity of {approx} 1.5 {center_dot} 10{sup 34} cm{sup -2} s{sup -1}. As the first step on the way to MC it envisages construction of a Neutrino Factory (NF) for high-precision neutrino experiments. The baseline scheme of the NF-MC complex is presented and possible options for its main components are discussed.

Alexahin, Y.; /Fermilab

2010-09-01T23:59:59.000Z

143

Radiative Muon Capture  

Science Journals Connector (OSTI)

The theory of radiative muon capture is developed. The discussion includes both parity conserving and nonconserving effects. The Gell-Mann weak magnetic term and the induced pseudoscalar are included, along with comparable relativistic effects in the nucleons. The theory is applied to light nuclei and especially to the radiative Godfrey reaction ?-+C126??+?+B125. An experiment to detect the induced pseudoscalar directly is proposed.

Jeremy Bernstein

1959-08-01T23:59:59.000Z

144

Critical Issues and MUON Colliders - A Summary  

E-Print Network [OSTI]

Prospects for a High Energy Muon Collider Based On Electro-and understanding of high energy muon colliders, associatedyield of muons per electron, even at the optimum energy of

Chattopadhyay, S.

2008-01-01T23:59:59.000Z

145

Too Many Muons from Cosmic Accelerators?  

Science Journals Connector (OSTI)

The evidence for both surface and underground muons produced by radiation from Cyg X3 is reviewed. The number of surface muons if real require impossibly large muon to electron ratios if they are produced by gamm...

R. Morse

1987-01-01T23:59:59.000Z

146

Anomalous Interactions of High Energy Muons  

Science Journals Connector (OSTI)

......research-article Articles Anomalous Interactions of High Energy Muons Takashi Kitamura Reiji Sugano Department of Physics...on penetrating showers with large transferred energies producted by high energy muons are accepted, the muon would have anomalous......

Takashi Kitamura; Reiji Sugano

1966-11-01T23:59:59.000Z

147

Muon Collider Overview: Progress and Future Plans  

E-Print Network [OSTI]

NATIONAL LABORATORY Muon Collider Overview: Progress andCBP Note-263 BNL- 65627 Muon Collider Overview: Progress and9] 5 REFERENCES [1] Status of the Muon Collider Research and

Palmer, R.

2008-01-01T23:59:59.000Z

148

Muon Simulation at the Daya Bay SIte  

E-Print Network [OSTI]

Muon simulation at the Daya Bay site Guan Mengyun ? Caowe simulated the underground muon background at the Daya Baysite. To get the sea-level muon ?ux parameteri- zation, a

Mengyun, Guan

2011-01-01T23:59:59.000Z

149

Muon colliders and neutrino factories  

SciTech Connect (OSTI)

Over the last decade there has been significant progress in developing the concepts and technologies needed to produce, capture and accelerate {Omicron}(10{sup 21}) muons/year. This development prepares the way for a new type of neutrino source (Neutrino Factory) and a new type of very high energy lepton-antilepton collider (Muon Collider). This article reviews the motivation, design and R&D for Neutrino Factories and Muon Colliders.

Geer, S.; /Fermilab

2010-09-01T23:59:59.000Z

150

Muon Capture by the Triton  

Science Journals Connector (OSTI)

Muon capture by the triton is investigated. "Exact" ground-state wave functions extracted from realistic nucleon-nucleon interactions are incorporated in the calculations. The treatment involves non-energy-weighted sum rules and explicit introduction of the three-neutron final state. Beside results on muon capture by He3, a lower limit is established for the muon-capture rate in H3.

J. Torre; Cl. Gignoux; G. Goulard

1978-02-20T23:59:59.000Z

151

muon_collider  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

muon_collider muon_collider muon_collider FridayMeetings MCTFmeetings MondayMeetings prstab texput.log #prstab.tex# last.kumac prstab.ps arxiv.tar.gz prstab.tar.gz referee_response_II.pdf prstab.pdf prstab.aux prstab.dvi prstab.end prstab.log prstab.tex prstab.tex~ accel-010307-f03.eps accel-010307-f28.eps old conclusions.tex higgsfact.tex introduction.tex mice.tex neufact.tex physics.tex prstab.tex r_and_d.tex authors_merged.tex buncher.tex temp.prt last.kumacold ringfig.eps MICE-fig.ps chgr_norm.ps chgr_merit.ps temp.csh temp.prt~ xupdn-a-model-view-iron5.eps site1-Layout1.eps rla2.eps phaserot.eps mole-hill.eps intoap.eps emit.eps cavity.eps allcount.eps MICE-88MHz-cooling.eps changes hh_ha_susy_rtsscan.eps letter_plots.eps scott33.eps scott32b.eps scott32a.eps MICE-200MHz-long.eps MICE-resolution.eps dipole_fields.eps

152

Muon Acceleration R and D  

SciTech Connect (OSTI)

An intense muon source can be built in stages to support a uniquely broad program in high energy physics. Starting with a low-energy cooled muon beam, extraordinarily precise lepton flavor violation experiments are possible. Upgrading the facility with acceleration and a muon storage ring, one can build a Neutrino Factory that would allow a neutrino mixing physics program with unprecedented precision. Adding further acceleration and a collider ring, an energy-frontier muon collider can explore electroweak symmetry breaking and open a window to new physics.

Torun, Yagmur [Illinois Institute of Technology, Chicago (United States)

2009-12-17T23:59:59.000Z

153

US: Muon Spin Resonance (?SR)  

Science Journals Connector (OSTI)

Fig. I.92. US, s.c. ?SR; Zero field muon spectra. Asymmetry, A, vs. ?. (a) Relaxation spectrum at 181 K, i.e. slightly above T ...

R. Tro?

2009-01-01T23:59:59.000Z

154

From Neutrino Factory to Muon Collider  

SciTech Connect (OSTI)

Both Muon Colliders and Neutrino Factories require a muon source capable of producing and capturing {Omicron}(10{sup 21}) muons/year. This paper reviews the similarities and differences between Neutrino Factory and Muon Collider accelerator complexes, the ongoing R&D needed for a Muon Collider that goes beyond Neutrino Factory R&D, and some thoughts about how a Neutrino Factory on the CERN site might eventually be upgraded to a Muon Collider.

Geer, S.; /Fermilab

2010-01-01T23:59:59.000Z

155

Imaging and sensing based on muon tomography  

DOE Patents [OSTI]

Techniques, apparatus and systems for detecting particles such as muons for imaging applications. Subtraction techniques are described to enhance the processing of the muon tomography data.

Morris, Christopher L; Saunders, Alexander; Sossong, Michael James; Schultz, Larry Joe; Green, J. Andrew; Borozdin, Konstantin N; Hengartner, Nicolas W; Smith, Richard A; Colthart, James M; Klugh, David C; Scoggins, Gary E; Vineyard, David C

2012-10-16T23:59:59.000Z

156

U.S. CMS - U.S. CMS @ Work - Detector Commissioning and Operations  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

USCMS Detector Ops USCMS Detector Ops Detector Commissioning and Operations In This Section: LHC@ FNAL Remote Operations Center Remote Operations Center at Fermilab Global Run Contact The US CMS Operations Group works very closely with the main CMS commissioning and operations team to develop and maintain the many online detector monitoring tools that make remote operations possible for hundreds of collaborators. One of the group's major roles focuses on coordinating the operation of the Remote Operations Center (ROC) at Fermilab with CMS operations at CERN. The main CMS control room resides at Point 5. Because this is a half-hour drive from the main laboratory campus in Meyrin, the experiment built the CMS Centre, a remote operations center on CERN's main site. The US CMS group therefore makes sure that operations remain seamless between the ROC

157

Muon Spin Rotation Spectroscopy - Utilizing Muons in Solid State Physics  

SciTech Connect (OSTI)

Over the past decades muon spin rotation techniques (mSR) have established themselves as an invaluable tool to study a variety of static and dynamic phenomena in bulk solid state physics and chemistry. Common to all these approaches is that the muon is utilized as a spin microprobe and/or hydrogen-like probe, implanted in the material under investigation. Recent developments extend the range of application to near surface phenomena, thin film and super-lattice studies. After briefly summarizing the production of so called surface muons used for bulk studies, and discussing the principle differences between pulsed and continuous muon beams, the production of keV-energy muon sources will be discussed. A few topical examples from different active research fields will be presented to demonstrate the power of these techniques.

Suter, Andreas [Paul Scherrer Institut, Switzerland

2012-10-17T23:59:59.000Z

158

Solenoidal Fields for Ion Beam Transport and Focusing  

SciTech Connect (OSTI)

In this report we calculate time-independent fields of solenoidal magnets that are suitable for ion beam transport and focusing. There are many excellent Electricity and Magnetism textbooks that present the formalism for magnetic field calculations and apply it to simple geometries [1-1], but they do not include enough relevant detail to be used for designing a charged particle transport system. This requires accurate estimates of fringe field aberrations, misaligned and tilted fields, peak fields in wire coils and iron, external fields, and more. Specialized books on magnet design, technology, and numerical computations [1-2] provide such information, and some of that is presented here. The AIP Conference Proceedings of the US Particle Accelerator Schools [1-3] contain extensive discussions of design and technology of magnets for ion beams - except for solenoids. This lack may be due to the fact that solenoids have been used primarily to transport and focus particles of relatively low momenta, e.g. electrons of less than 50 MeV and protons or H- of less than 1.0 MeV, although this situation may be changing with the commercial availability of superconducting solenoids with up to 20T bore field [1-4]. Internal reports from federal laboratories and industry treat solenoid design in detail for specific applications. The present report is intended to be a resource for the design of ion beam drivers for Inertial Fusion Energy [1-5] and Warm Dense Matter experiments [1-6], although it should also be useful for a broader range of applications. The field produced by specified currents and material magnetization can always be evaluated by solving Maxwell's equations numerically, but it is also desirable to have reasonably accurate, simple formulas for conceptual system design and fast-running beam dynamics codes, as well as for general understanding. Most of this report is devoted to such formulas, but an introduction to the Tosca{copyright} code [1-7] and some numerical results obtained with it are also presented. Details of design, fabrication, installation, and operation of magnet systems are not included; here we are concerned with calculations that precede or supplement detailed design. Mathematical derivations are presented with only a moderate number of steps. While there is no claim of originality, except for various numerical approximations and a conceptual induction module design in section 20, many of the results and discussions are not readily available elsewhere. Our primary topic is axisymmetric solenoidal systems with no magnetic materials. These simplifying features allow useful analytical calculations, which occupy sections 2-13. Deviations from axisymmetry are considered in sections 14, 15, 21, 22, and 23 and the effects of magnetic materials are treated in sections 16-20. Since magnetic aberrations are mixed with geometric aberrations in computing ion orbits, section 22 on the ion equations of motion in an arbitrary field is included.

Lee, Edward P.; Leitner, Matthaeus

2007-11-01T23:59:59.000Z

159

Numerical study of a bucked-coil system for muon transport and cooling  

SciTech Connect (OSTI)

A Neutrino Factory, which can deliver an intense flux of {approx}10{sup 21} neutrinos per year from a multi-GeV stored muon-beam is seemingly the ideal tool for studying neutrino oscillations and CP-violations for leptons. The front-end of this facility plays a critical role in determining the number of muons that can be accepted by the downstream accelerators. Delivering peak performance requires transporting the muon beams through long sections of a beam channel containing high-gradient rf cavities and strong focusing solenoids. Here, we propose a novel scheme to improve the performance of the cavities, thereby increasing the number of muons within the acceptance of the accelerator chain. The key element of our new scheme is to apply a set of bucked coils along the lattice, thus forcing the external magnetic field to drop substantially within the cavity. We incorporate this idea into a new lattice design for a Neutrino Factory, and detail its performance numerically.

Stratakis, Diktys; Alekou, Androula; Neuffer, David; Pasternak, Jaroslaw; Rogers, Chris T. [Brookhaven National Laboratory, Department of Physics, Upton, NY 11973 (United States); Imperial College London, Blackett Laboratory, Prince Consort Rd, London, SW7 2BW (United Kingdom); Fermi National Acceleartor Laboratory, Batavia, IL 60510 (United States); Imperial College London, Blackett Laboratory, Prince Consort Rd, London, SW7 2BW (United Kingdom) and Rutherford Appleton Laboratory, Chilton, Didcot (United Kingdom); Rutherford Appleton Laboratory, Chilton, Didcot (United Kingdom)

2012-12-21T23:59:59.000Z

160

An Overview on Muon Physics  

SciTech Connect (OSTI)

A summary of the present status of the charged lepton flavor violation search with muons is presented. The relevant measurements (g-2){sub {mu}}, the {mu} {sup +}{yields} e{sup +} {gamma} decay and the direct muon-to-electron conversion projects are briefly reviewed.

Piredda, Giancarlo [INFN Sezione di Roma, Dipartimento di Fisica, Universita Sapienza (Italy)

2011-10-06T23:59:59.000Z

Note: This page contains sample records for the topic "muon solenoid cms" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Muon catalysis of hot fusion  

Science Journals Connector (OSTI)

... all rates to the nearest order of magnitude). In other words, stripping of the muon is very probable, and it would thus be able to take part in further ... the confinement time is 109s, and the reaction rate 109s-1, on average each muon would catalyse one reaction, hence the occurrence of Rc (the catalytic chain ratio) ...

E. P. HINCKS; M. K. SUNDARESAN; P. J. S. WATSON

1977-10-13T23:59:59.000Z

162

Fundamental Constants of the Muon  

Science Journals Connector (OSTI)

Three precise measurements exist on static properties of the muon. These are the g factor, g-2, and the frequency of the 3D-2P transition in mesonic phosphorus. They are combined to obtain the best fit to the fundamental constants of the muon.

G. Shapiro and L. M. Lederman

1962-02-01T23:59:59.000Z

163

CAT Guide to the ANL CMS system  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

APS CAT Guide to Using the ANL Chemical Management System APS CAT Guide to Using the ANL Chemical Management System (August 30, 2000) The Argonne Chemical Management System (CMS) is a database used to track the ownership and location of primary (original) containers1 of hazardous chemicals. It provides for a current listing of hazardous chemicals to which individuals working at Argonne might be exposed and it provides for automated generation of reports required by the EPA and OSHA. Finally, each inventory entry is linked to the MSDS for the product. Applicability APS CATs should use the Chemical Management System (CMS) as described below: Container Description Barcode & CMS Record Creation Required? Comments Any container received with an Argonne barcode. Yes, label already present. The corresponding CMS record must be updated when the container is permanently moved to a new location, when ownership changes, or when the container is emptied and discarded.

164

U.S. CMS - 2008 News Archive  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

8 News Archive 8 News Archive In This Section: CMS in the News Press Releases Press Kit CMS Result of the Month Other News Sources: US LHC Interactions.org U.S. CMS Past News Archives: 2012 News Archive 2011 News Archive 2010 News Archive 2009 News Archive 2008 News Archive 2007 News Archive Current news archive 16 December 2008 - Fermilab Today The doctor is in 8 December 2008 - Caltech Press Release High Energy Physics Team Sets New Data-Transfer World Records 5 December 2008 - The New York Times After Repairs, Summer Start-Up Planned for Collider 5 December 2008 - BBC Collider 'needs warning system' 5 December 2008 - Science News First LHC proton collisions postponed further 5 December 2008 - Interactions News Wire LHC to restart in 2009 3 December 2008 - Fermilab Today No quiet time for CMS

165

CAT Guide to the ANL CMS system  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

APS CAT Guide to Using the ANL Chemical Management System (August 30, 2000) The Argonne Chemical Management System (CMS) is a database used to track the ownership and location of...

166

Top quark production at ATLAS and CMS  

E-Print Network [OSTI]

A review of the main recent results on top quark production from the ATLAS and CMS experiments is presented. Results on both electroweak single top quark production and strong top pair production are presented.

Luca Lista; on behalf of the ATLAS; CMS collaborations

2014-05-20T23:59:59.000Z

167

Muon Capture by Deuterons  

Science Journals Connector (OSTI)

Rates of muon capture from the separate ?d hyperfine states are computed. The dependence of the measurement of effective coupling constants on the neutron energy is explicitly demonstrated. The calculation of the neutron energy spectra includes mainly the following refinements: (1) use of two-nucleon wave functions with hard core, (2) corrections for the target-proton momentum, and (3) inclusion of certain induced pseudoscalar terms. The capture rates obtained are 334 and 15 sec-1 for the ?d doublet and quartet states, respectively.

I-T. Wang

1965-09-20T23:59:59.000Z

168

The Neutrino Factory and Muon Collider Collaboration Physics Opportunities with Muon Beams  

E-Print Network [OSTI]

The Neutrino Factory and Muon Collider Collaboration Physics Opportunities with Muon Beams: Neutrino Factories and Muon Colliders p Source, 8­24 GeV, 1­4MW A Neutrino Factory based on a Muon Storage Linac 2 ­ 50 GeV Recirculating Linac 50­GeV Muon Storage Ring ~ 1km circumference Neutrino Beam to Near

McDonald, Kirk

169

Negative Muon Chemistry: The Quantum Muon Effect and the Finite Nuclear Mass Effect  

Science Journals Connector (OSTI)

Negative Muon Chemistry: The Quantum Muon Effect and the Finite Nuclear Mass Effect ... In this approach electrons and muons are described as quantum waves. ... The nonrelativistic Hamiltonian, Htot, of a molecular system containing Ne electrons, N? muons, and Nnuc nuclei is(1)here m? is the muon mass and MA and ZA are the mass and charge of nucleus A, respectively. ...

Edwin Posada; Félix Moncada; Andrés Reyes

2014-09-04T23:59:59.000Z

170

OPTIMIZING MUON CAPTURE AND TRANSPORT FOR A NEUTRINO FACTORY/MUON COLLIDER FRONT END  

E-Print Network [OSTI]

OPTIMIZING MUON CAPTURE AND TRANSPORT FOR A NEUTRINO FACTORY/MUON COLLIDER FRONT END Hisham K In the current baseline scheme of the Neutrino Fac- tory/Muon Collider a muon beam from pion decay is pro- duced of the field along the beam, were varied to maximize the number of muons delivered to the Cooling Channel

McDonald, Kirk

171

The Neutrino Factory and Muon Collider Collaboration Physics Opportunities with Muon Beams  

E-Print Network [OSTI]

The Neutrino Factory and Muon Collider Collaboration Physics Opportunities with Muon Beams: Neutrino Factories and Muon Colliders p Source, 8-24 GeV, 1-4MW A Neutrino Factory based on a Muon StorageV Recirculating Linac 50-GeV Muon Storage Ring ~ 1km circumference Neutrino Beam to Near Detector Neutrino Beam

McDonald, Kirk

172

Muon B Flavor Tagging A Likelihood Approach  

E-Print Network [OSTI]

Muon B Flavor Tagging A Likelihood Approach Text for the blessed web page { CDF note 7043 The CDF Collaboration July 29, 2004 Abstract We describe a muon identi#12;cation algorithm to be used for opposite side in a likelihood function which estimates the probability that a muon object is a real muon. The tagger performance

Fermilab

173

Research and Development of Future Muon Collider  

SciTech Connect (OSTI)

Muon collider is a considerable candidate of the next generation high-energy lepton collider machine. A novel accelerator technology must be developed to overcome several intrinsic issues of muon acceleration. Recent research and development of critical beam elements for a muon accelerator, especially muon beam phase space ionization cooling channel, are reviewed in this paper.

Yonehara, K.; /Fermilab

2012-05-01T23:59:59.000Z

174

BNL -66968 CAP-265-Muon-99C  

E-Print Network [OSTI]

BNL - 66968 CAP-265-Muon-99C The Design of a Liquid Lithium Lens for a Muon Collider A. Hassanein, 1999, Vol. 5, pp. 3062-3064. #12;I #12;THE DESIGN OF A LIQUID LITHIUM LENS FOR A MUON COLLIDER* A stage of ionization cooling for the muon collider requires a multistage liquid lithium lens. This system

Harilal, S. S.

175

Muon reconstruction with AMANDA Christopher Wiebusch  

E-Print Network [OSTI]

Muon reconstruction with AMANDA Christopher Wiebusch DESY IfH Platanenallee 6, 15738 Zeuthen, Germany Abstract This document describes the method of muon track reconstruction in AMANDA. #12; 1 particles such as muons. Clearly identified up­going muon tracks are a key signature for charged current

Wiebusch, Christopher

176

Optical solenoid beams Sang-Hyuk Lee,1 Yohai Roichman,2 and David G. Grier2  

E-Print Network [OSTI]

Optical solenoid beams Sang-Hyuk Lee,1 Yohai Roichman,2 and David G. Grier2 1Department York, NY 10003 Abstract: We introduce optical solenoid beams, diffractionless solutions, and whose wavefronts carry an indepen- dent helical pitch. Unlike other collimated beams of light

Grier, David

177

Optical solenoid beams SangHyuk Lee, 1 Yohai Roichman, 2 and David G. Grier 2  

E-Print Network [OSTI]

Optical solenoid beams Sang­Hyuk Lee, 1 Yohai Roichman, 2 and David G. Grier 2 1 Department, New York, NY 10003 Abstract: We introduce optical solenoid beams, diffractionless solutions, and whose wavefronts carry an indepen­ dent helical pitch. Unlike other collimated beams of light

Grier, David

178

Muon-induced backgrounds in the CUORICINO experiment  

E-Print Network [OSTI]

Muon-induced backgrounds in the CUORICINO experiment E.the contribution of cosmic ray muons to the CUORICINOKey words: CUORICINO, muons, cosmic rays, double beta decay,

Andreotti, E.

2010-01-01T23:59:59.000Z

179

Radiative Muon Capture in Calcium  

Science Journals Connector (OSTI)

The branching ratio relative to ordinary muon capture and the photon asymmetry relative to the muon-spin direction were measured for radiative muon capture in Ca40. For ~ 1200 photon events, the partial branching ratio is Rk>57 MeV=(21.1±1.4)×10-6, and the asymmetry for k>63.5 MeV is +0.90±0.50. A fit of the photon spectrum to the theory of Rood, Yano, and Yano gives the value gP?=(6.5±1.6)gA for the pseudoscalar-coupling constant. These results are in disagreement with earlier experiments.

R. D. Hart; C. R. Cox; G. W. Dodson; M. Eckhause; J. R. Kane; M. S. Pandey; A. M. Rushton; R. T. Siegel; R. E. Welsh

1977-08-15T23:59:59.000Z

180

Muon motion irradiated by a femtosecond laser pulse in muon-catalyzed fusion  

Science Journals Connector (OSTI)

Introducing a superintense femtosecond laser pulse in the muon-catalyzed fusion (?CF) target, taking ... equations, the paper studies the movement of muon in the plasma. Muon drift along the direction of laser pr...

Tong-cheng Wu ???; Chun-hua Shi ???…

2008-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "muon solenoid cms" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Muon-spin-rotation study of muon polarization losses in plastic scintillators and quartz  

Science Journals Connector (OSTI)

Muon polarization losses in plastic scintillators of two ... been studied by the ?SR method. The muon and muonium spin precession spectra have been ... SR setup placed at the output of the muon channel of the Gat...

S. I. Vorob’ev; A. L. Getalov; E. N. Komarov; S. A. Kotov; I. I. Pavlova…

2013-08-01T23:59:59.000Z

182

Direct production of muon pairs by high-energy muons  

Science Journals Connector (OSTI)

For ultrarelativistic muons, the cross section for the process ?+Z??+Z+?++?? is calculated with allowance for the nuclear and atomic form factors. It is shown that the nuclear form factor affects significantly th...

S. R. Kel’ner; R. P. Kokoulin; A. A. Petrukhin

2000-09-01T23:59:59.000Z

183

Muon Physics Possibilities at a Muon-Neutrino Factory  

Science Journals Connector (OSTI)

New intense proton accelerators with above GeV energies and MW beam power, such as they are discussed in connection with neutrino factories, appear to be excellently suited for feeding bright muon sources for low...

Klaus P. Jungmann

184

Fermilab | Science | Particle Physics | Muons  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

force at the time of the big bang? How did the universe change from being dominated by energy and radiation to the one we see today, made of both visible and dark matter? Muons...

185

The Muon Anomalous Magnetic Moment  

E-Print Network [OSTI]

The calculations entering the prediction of the standard model value for the anomalous magnetic moment of the muon $a_\\mu$ are reviewed, and compared to the very accurate experimental measurement. The situation for the electron is discussed in parallel.

Knecht, Marc

2014-01-01T23:59:59.000Z

186

On the muon neutrino mass  

E-Print Network [OSTI]

During the runs of the PS 179 experiment at LEAR of CERN, we photographed an event of antiproton-Ne absorption, with a complete pi+ -> mu+ ->e+ chain. From the vertex of the reaction a very slow energy pi+ was emitted. The pi+ decays into a mu+ and subsequently the mu+ decays into a positron. At the first decay vertex a muon neutrino was emitted and at the second decay vertex an electron neutrino and a muon antineutrino. Measuring the pion and muon tracks and applying the momentum and energy conservation and using a classical statistical interval estimator, we obtained an experimental upper limit for the muon neutrino mass: m_nu < 2.2 MeV at a 90% confidence level. A statistical analysis has been performed of the factors contributing to the square value of the neutrino mass limit.

N. Angelov; F. Balestra; Yu. Batusov; A. Bianconi; M. P. Bussa; L. Busso; L. Ferrero; R. Garfagnini; I. Gnesi; E. Lodi Rizzini; A. Maggiora; D. Panzieri; G. Piragino; G. Pontecorvo; F. Tosello; L. Venturelli

2006-05-03T23:59:59.000Z

187

LINACS FOR FUTURE MUON FACILITIES  

SciTech Connect (OSTI)

Future Muon Colliders (MC) and Neutrino Factories (NF) based on muon storage rings will require innovative linacs to: produce the muons, cool them, compress longi-tudinally and ‘shape’ them into a beam and finally to rap-idly accelerate them to multi-GeV (NF) and TeV (MC) energies. Each of these four linac applications has new requirements and opportunities that follow from the na-ture of the muon in that it has a short lifetime (? = 2.2 ?sec) in its own rest frame, it is produced in a tertiary process into a large emittance, and its electron, photon, and neutrino decay products can be more than an annoy-ance. As an example, for optimum performance, the linac repetition rates should scale inversely with the laboratory lifetime of the muon in its storage ring, something as high as 1 kHz for a 40 GeV Neutrino Factory or as low as 20 Hz for a 5 TeV Muon Collider. A superconducting 8 GeV Linac capable of CW operation is being studied as a ver-satile option for muon production [1] for colliders, facto-ries, and muon beams for diverse purposes. A linac filled with high pressure hydrogen gas and imbedded in strong magnetic fields has been proposed to rapidly cool muon beams [2]. Recirculating Linear Accelerators (RLA) are possible because muons do not generate significant syn-chrotron radiation even at extremely high energy and in strong magnetic fields. We will describe the present status of linacs for muon applications; in particular the longitu-dinal bunch compression in a single pass linac and multi-pass acceleration in the RLA, especially the optics and technical requirements for RLA designs, using supercon-ducting RF cavities capable of simultaneous acceleration of both ?+ and ?? species, with pulsed linac quadrupoles to allow the maximum number of passes. The design will include the optics for the multi-pass linac and droplet-shaped return arcs.

Slawomir Bogacz, Rolland Johnson

2008-10-01T23:59:59.000Z

188

The US muon accelerator program  

E-Print Network [OSTI]

A directed R&D program is presently underway in the U.S. to evaluate the designs and technologies required to provide muon-based high energy physics (HEP) accelerator capabilities. Such capabilities have the potential to provide unique physics reach for the HEP community. An overview of the status of the designs for the neutrino factory and muon collider applications is provided. Recent progress in the technology R&D program is summarized.

Palmer, M A

2015-01-01T23:59:59.000Z

189

Radiative muon absorption in oxygen  

Science Journals Connector (OSTI)

The photon spectrum from radiative absorption of negative muons in O16 has been measured with a high-resolution pair spectrometer. The integrated branching ratio for photons with energies greater than 57 MeV relative to the total muon absorption rate is (3.8±0.4)×10-5. The data are consistent with nuclear model calculations for a value of the induced pseudoscalar coupling in O16 of gP/gA=13.5±1.5.

A. Frischknecht; M. Döbeli; W. Stehling; G. Strassner; P. Truöl; J. C. Alder; C. Joseph; J. F. Loude; J. P. Perroud; D. Ruegger; M. T. Tran; H. Panke

1988-11-01T23:59:59.000Z

190

Muon Colliders: The Next Frontier  

SciTech Connect (OSTI)

Muon Colliders provide a path to the energy frontier in particle physics but have been regarded to be "at least 20 years away" for 20 years. I will review recent progress in design studies and hardware R&D and show that a Muon Collider can be established as a real option for the post-LHC era if the current vigorous R&D effort revitalized by the Muon Collider Task Force at Fermilab can be supported to its conclusion. All critical technologies are being addressed and no show-stoppers have emerged. Detector backgrounds have been studied in detail and appear to be manageable and the physics can be done with existing detector technology. A muon facility can be built through a staged scenario starting from a low-energy muon source with unprecedented intensity for exquisite reach for rare processes, followed by a Neutrino Factory with ultrapure neutrino beams with unparalleled sensitivity for disentangling neutrino mixing, leading to an energy frontier Muon Collider with excellent energy resolution.

Yagmur Tourun

2009-07-29T23:59:59.000Z

191

Muon Colliders: The Next Frontier  

ScienceCinema (OSTI)

Muon Colliders provide a path to the energy frontier in particle physics but have been regarded to be "at least 20 years away" for 20 years. I will review recent progress in design studies and hardware R&D and show that a Muon Collider can be established as a real option for the post-LHC era if the current vigorous R&D effort revitalized by the Muon Collider Task Force at Fermilab can be supported to its conclusion. All critical technologies are being addressed and no show-stoppers have emerged. Detector backgrounds have been studied in detail and appear to be manageable and the physics can be done with existing detector technology. A muon facility can be built through a staged scenario starting from a low-energy muon source with unprecedented intensity for exquisite reach for rare processes, followed by a Neutrino Factory with ultrapure neutrino beams with unparalleled sensitivity for disentangling neutrino mixing, leading to an energy frontier Muon Collider with excellent energy resolution.

Yagmur Tourun

2010-01-08T23:59:59.000Z

192

Novel linac structures for low-beta ions and for muons  

SciTech Connect (OSTI)

Development of two innovative linacs is discussed. (1) High-efficiency normal-conducting accelerating structures for ions with beam velocities in the range of a few percent of the speed of light. Two existing accelerator technologies - the H-mode resonator cavities and transverse beam focusing by permanent-magnet quadrupoles (PMQ) - are merged to create efficient structures for light-ion beams of considerable currents. The inter-digital H-mode accelerator with PMQ focusing (IH-PMQ) has the shunt impedance 10-20 times higher than the standard drift-tube linac. Results of the combined 3-D modeling for an IH-PMQ accelerator tank - electromagnetic computations, beam-dynamics simulations, and thermal-stress analysis - are presented. H-PMQ structures following a short RFQ accelerator can be used in the front end of ion linacs or in stand-alone applications like a compact mobile deuteron-beam accelerator up to a few MeV. (2) A large-acceptance high-gradient linac for accelerating low-energy muons in a strong solenoidal magnetic field. When a proton beam hits a target, many low-energy pions are produced almost isotropically, in addition to a small number of high-energy pions in the forward direction. We propose to collect and accelerate copious muons created as the low-energy pions decay. The acceleration should bring muons to a kinetic energy of {approx}200 MeV in about 10 m, where both an ionization cooling of the muon beam and its further acceleration in a superconducting linac become feasible. One potential solution is a normal-conducting linac consisting of independently fed O-mode RF cavities with wide apertures closed by thin metal windows or grids. The guiding magnetic field is provided by external superconducting solenoids. The cavity choice, overall linac design considerations, and simulation results of muon acceleration are presented. Potential applications range from basic research to homeland defense to industry and medicine.

Kurennoy, Sergey S [Los Alamos National Laboratory

2010-01-01T23:59:59.000Z

193

CMS High Luminosity Workshop Alushta, Ukraine, May 29, 2012  

E-Print Network [OSTI]

CMS High Luminosity Workshop Alushta, Ukraine, May 29, 2012 Rick Field ­ Florida/CDF/CMS Page 1-Boson Production Z-boson Outgoing Parton Initial-State Radiation Alushta, Crimea, Ukraine, May 2012 How Universal Energy Scan (300 GeV, 900 GeV, 1.96 TeV). #12;CMS High Luminosity Workshop Alushta, Ukraine, May 29, 2012

Field, Richard

194

Muon transfer induced by collisional excitation of helium muonide He?+ after muon catalyzed fusionafter muon catalyzed fusion  

Science Journals Connector (OSTI)

Possibility of negative muon transfer from helium muonide He?+...to T /or D/ through collisional excitation after muon catalyzed fusion has been pointed out. The...+...in the medium of tritium or deuterium. It is...

K. Yoshihara; T. Sekine

1988-09-01T23:59:59.000Z

195

U.S. CMS - U.S. CMS @ Work - Research Program Office/Management - Software  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

5-01 5-01 Fermilab Software and Computing Oversight Panel (SCOP) Review of the U.S. CMS Software and Computing Project January 13-14, 2005 Charge to the SCOP Agenda | Logistics | Attendees | Documentation Agenda: Copies of the slides presented will be available for the meeting. Thursday, January 13, 2005 Start of Meeting 9:00 am Chicago Time (other time zones) Time Title Speaker Duration 8:30 AM Video Setup 9:00 AM Executive Session (closed) Panel 30' 9:30 AM Introduction LAT Bauerdick 5' 9:35 AM CMS Status and U.S. CMS Research Program [slides] Dan Green 20' + 10' 10:05 AM Needs of and interactions with the LPC [slides] Avi Yagil 20' + 5' 10:30 AM Coffee 20' 10:50 AM Project Overview [slides] LAT Bauerdick 50' + 10' 11:50 AM CMS Computing and Core Software Status [slides] Bob Clare 15' + 5'

196

Muon Collaboration Friday Meetings  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Collaboration Friday Meetings Collaboration Friday Meetings Muon Collaboration Friday Meetings are held at Fermilab, in the Snakepit (WH 2E), at 1:30 pm CDT/CST on most Fridays. An audio bridge is available, details are in the meeting notice. To receive the weekly meeting notice, either join the NuMu-Collaboration-l mailing list or send email to Terry Hart (look me up in the FNAL Phonebook). 13-NOV-2009 Agenda Zisman.pdf 30-OCT-2009 Agenda Bross.ppt Ankenbrandt.ppt 22-OCT-2009 Agenda Fernow_1.pdf Fernow_2.pdf Snopok.pdf Palmer.pdf 16-OCT-2009 Agenda News Alexahin.ppt Alexakhin.pdf 9-OCT-2009 Agenda Yonehara.ppt 8-OCT-2009 Agenda Kirk.pdf 1-OCT-2009 Agenda Lamm.pdf 25-SEP-2009 Agenda Fernow.pdf 24-SEP-2009 Agenda 18-SEP-2009 Derun.pptx 17-SEP-2009 popovic.ppt 10-SEP-2009 Action_items.doc Bross.ppt Agenda 4-SEP-2009 Kaplan.pdf

197

Heavy Flavour Physics at CMS and ATLAS  

E-Print Network [OSTI]

Prospects for heavy flavour studies with the CMS and ATLAS detectors are presented. Many studies are aimed for early LHC data, taking advantage of the large $b$ production cross-section. Rare decay studies as the $B_s \\to \\mu^+\\mu^-$ decay have also been performed.

L. Wilke; for the CMS; ATLAS Collaborations

2009-05-26T23:59:59.000Z

198

The Program in Muon and Neutrino Physics: Super Beams, Cold Muon Beams,  

E-Print Network [OSTI]

The Program in Muon and Neutrino Physics: Super Beams, Cold Muon Beams, Neutrino Factory and the Muon Collider Editor: Rajendran Raja1 1 Fermi National Accelerator Laboratory, Batavia, IL 60510, USA Members of the Executive Board of the Muon Collaboration D. Cline,2 J. Gallardo,3 S. Geer,1 D. Kaplan,4 K

199

Directional muon jet chamber for a muon collider (Groovy Chamber)  

SciTech Connect (OSTI)

A directional jet drift chamber with PAD readout is proposed here which can select vertex originated muons within a given time window and eliminate those muons which primarily originate upstream, using only a PAD readout. Drift time provides the Z-coordinate, and the center of gravity of charge distribution provides the r-{psi} coordinates. Directionality at the trigger level is obtained by the timing measurement from the PAD hits within a given time window. Because of the long drift time between the bunch crossings, a muon collider enables one to choose a drift distance in the drift chamber as long as 50 cm. This is an important factor in reducing cost of drift chambers which have to cover relatively large areas.

Atac, M. [Fermi National Accelerator Lab., Batavia, IL (United States)]|[Univ. of California, Los Angeles, CA (United States)

1996-10-01T23:59:59.000Z

200

Search for muon-electron and muon-positron conversion  

Science Journals Connector (OSTI)

Limits on the lepton-flavor-violating reactions ?-+Z?e-+Z and ?-+Z?e++(Z-2), muon-electron and muon-positron conversion, have been obtained from a search performed at TRIUMF using a time-projection chamber. Upper limits (90% C.L.) for the branching ratios compared to ordinary muon capture for a titanium target are R—(Ti)=?(?-Ti?e-Ti)/?(?-Ti capture)<4.6×10-12 and R+(Ti)=?(?-Ti?e+Ca*)/?(?-Ti capture)<.1.7×10-10 A smaller data set obtained using a lead target yielded R-(Pb)<4.9×10-10. The implications of these results for extensions of the standard model which allow lepton-flavor violation are discussed.

S. Ahmad; G. Azuelos; M. Blecher; D. A. Bryman; R. A. Burnham; E. T. H. Clifford; P. Depommier; M. S. Dixit; K. Gotow; C. K. Hargrove; M. Hasinoff; M. Leitch; J. A. Macdonald; H. Mes; I. Navon; T. Numao; J-M. Poutissou; R. Poutissou; P. Schlatter; J. Spuller; J. Summhammer

1988-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "muon solenoid cms" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Experiments with low-energy muons  

Science Journals Connector (OSTI)

Two experiments with low-energy muons are described: the determination of the stopping ... of C, Si, Ti and Au for muons at energies down to 2 keV and the measurement ... . A pronounced Barkas effect was found fo...

F. J. Hartmann; H. Daniel; Chr Maierl; M. Mühlbauer; W. Schott…

1996-01-01T23:59:59.000Z

202

Muon catalysed fusion for pellet ignition  

Science Journals Connector (OSTI)

... and ordinary fusion reaction rates. Simultaneously, or a short time beforehand, a pulse of muons (probably > 1010 in 1010 in muon energy distribution is selected such that most of the ...

W.P.S. Tan

1976-10-21T23:59:59.000Z

203

Diamagnetic muon yields of metal acetylacetonates  

Science Journals Connector (OSTI)

Diamagnetic muon yields /PD.../ in various metal acetylacetonates were measured at room temperature by the muon spin rotation technique. We have found a...D between complexes of typical elements and those of tran...

M. K. Kubo; Y. Sakai; T. Tominaga…

1989-05-02T23:59:59.000Z

204

Muon Spin Rotation Studies of Enediynes  

Science Journals Connector (OSTI)

The muon spin plays the role of a nuclear spin, but the spectroscopy proves to be equally sensitive both to muons in electronically diamagnetic environments and to those which experience a hyperfine coupling with paramagnetic electrons, the latter being of importance to the studies involving organic radicals. ... The samples were mounted in a cryostat and exposed to the beam of spin-polarized positive muons while an external magnetic field of 0.2 T was applied transverse to the muon (spin) beam direction. ... To correlate a positron decay with a muon incident on the sample, the experiment was run in time differential mode in which the incoming muon starts a clock at t = 0 and in so doing triggers a gate signal of 10 ?s length (a few muon lifetimes) during which no further muons can be counted. ...

Vasily S. Oganesyan; Andrew N. Cammidge; Gareth A. Hopkins; Fiona M. Cotterill; Ivan D. Reid; Upali A. Jayasooriya

2004-02-17T23:59:59.000Z

205

Muon Knight Shift Studies in Metals  

Science Journals Connector (OSTI)

The Knight shift K? of the positive muon implanted as a proton substitute in various ... has been measured by means of a stroboscopic muon spin rotation method 1). The stroboscopic ... + SR technique bases on a p...

F. N. Gygax; A. Hintermann; W. Rüegg…

1980-01-01T23:59:59.000Z

206

Muon motion in titanium hydride  

Science Journals Connector (OSTI)

Motional narrowing of the transverse-field muon-spin rotation signal has been reported previously for ?-TiHx with x=1.83, 1.97, and 1.99. An analysis of the results for TiH1.99 near room temperature indicates that the mechanism responsible for the motion of the muon out of the octahedral site is thermally activated diffusion with an attempt frequency comparable to the optical vibrations of the lattice. The motional narrowing in TiH1.97 near 500 K is interpreted with the aid of Monte Carlo calculations which simulated the effect of muon and proton motion upon the field-correlation time for the muon. The results of these simulations coupled with published proton nuclear-magnetic-resonance T1 measurements indicate that the field-correlation time for the muon can be explained if the rate of motion for the nearest-neighbor protons is decreased relative to the hopping rate for the unperturbed lattice.

J. R. Kempton; K. G. Petzinger; W. J. Kossler; H. E. Schone; C. E. Stronach

1989-07-01T23:59:59.000Z

207

A search for new physics with Z bosons, jets, and missing transverse energy at CMS  

E-Print Network [OSTI]

fractional energy loss grows with muon energy. The averageinteractions is flat with muon energy, but rare photonuclearmomentum of high energy muons and other charged particles.

Andrews, Warren T.

2012-01-01T23:59:59.000Z

208

Muon-Pair Production by Atmospheric Muons in CosmoALEPH  

Science Journals Connector (OSTI)

Data from a dedicated cosmic ray run of the ALEPH detector were used in a study of muon trident production, i.e., muon pairs produced by muons. Here the overburden and the calorimeters are the target materials while the ALEPH time projection chamber provides the momentum measurements. A theoretical estimate of the muon trident cross section is obtained by developing a Monte Carlo simulation for muon propagation in the overburden and the detector. Two muon trident candidates were found to match the expected theoretical pattern. The observed production rate implies that the nuclear form factor cannot be neglected for muon tridents.

F. Maciuc; C. Grupen; N.-O. Hashim; S. Luitz; A. Mailov; A.-S. Müller; A. Putzer; H.-G. Sander; S. Schmeling; M. Schmelling; R. Tcaciuc; H. Wachsmuth; Th. Ziegler; K. Zuber

2006-01-19T23:59:59.000Z

209

Improvement of the Track-based Alignment Procedure of the CMS Muon System  

E-Print Network [OSTI]

. James and M. Roos. Minuit - a system for function minimization and analysis of the parameter errors and correlations. Computer Physics Communications, 10(6):343 – 367, 1975. [9] R. Brun and F. Rademakers. ROOT. http://root.cern.ch, 2004. 30 ...

Amin, Nick Jogesh

2013-12-02T23:59:59.000Z

210

A Test Stand for the Muon Trigger Development for the CMS Experiment at the LHC  

E-Print Network [OSTI]

-strip ID is displayed on the LEDs of the board and along with the GEM pad ID is transmitted via optical fibers to the CSC TMB. The algorithm operating the CSC TMB must determine whether the hits from the CSC and the GEM systems are consistent... selection switches, which attach to the table-top TMB. The blue device allows the user to input a GEM pad ID number in binary. 19 the half-strip number is displayed on the LEDs located on the right side of the board, as shown in Figure 10...

Lakdawala, Samir

2013-05-02T23:59:59.000Z

211

Muon Yield Comparisons for Different ICOOL  

E-Print Network [OSTI]

1 Muon Yield Comparisons for Different ICOOL Versions and Lattices X. Ding Front End, Nov. 23, 2010 parameters of 11 and 13GeV from interpolation) � Take the muon/pion/kaons at z=0 m from MARS output (Field of Running MARS #12;4 Muon Yield from Different Versions of ICOOL with ST2a-BNL Input Deck #12;5 Muon Yield

McDonald, Kirk

212

Design Construction and Test Results of a HTS Solenoid for Energy Recovery Linac  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

DESIGN CONSTRUCTION AND TEST RESULTS OF A HTS SOLENOID DESIGN CONSTRUCTION AND TEST RESULTS OF A HTS SOLENOID FOR ENERGY RECOVERY LINAC* R. Gupta # , M. Anerella, I. Ben-Zvi, G. Ganetis, D. Kayran, G. McIntyre, J. Muratore, S. Plate and W. Sampson, Brookhaven National Laboratory, Upton, NY, 11973 USA and M. Cole and D. Holmes, Advanced Energy Systems, Inc., Medord, NY, 11763 USA Abstract An innovative feature of the proposed Energy Recovery Linac (ERL) is the use of a solenoid made with High Temperature Superconductor (HTS) with the Superconducting RF cavity. The use of HTS allows solenoid to be placed in close proximity to the cavity and thus provides early focusing of the electron beam. In addition, cryogenic testing at ~77 K is simpler and cheaper than 4 K testing. This paper will present the

213

E-Print Network 3.0 - aperture superconducting solenoid Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Coils 1st Main Solenoid last "double" layer underway NLE layer 24 complete NLE layer 25... application of POR-15 epoxy putty between conductor and flange) 12;5 AFF,...

214

E-Print Network 3.0 - atlas solenoid magnetic Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Page: << < 1 2 3 4 5 > >> 1 MERIT Installation Status K. McDonald Summary: , transfer lines, racks, beam magnets. Solenoid mated with Hg system, both tilted by 67 mrad &...

215

The electromagnetic calorimeter for the solenoidal tracker at RHIC. A Conceptual Design Report  

SciTech Connect (OSTI)

This report discusses the following on the electromagnetic calorimeter for the solenoidal tracker at RHIC: conceptual design; the physics of electromagnetic calorimetry in STAR; trigger capability; integration into STAR; and cost, schedule, manpower, and funding.

Beddo, M.E.; Bielick, E.; Dawson, J.W. [Argonne National Lab., IL (United States)] [and others; The STAR EMC Collaboration

1993-09-22T23:59:59.000Z

216

Muon Spin Relaxation Studies of Lithium Nitridometallate Battery Materials: Muon Trapping and Lithium Ion Diffusion  

Science Journals Connector (OSTI)

Muon Spin Relaxation Studies of Lithium Nitridometallate Battery Materials: Muon Trapping and Lithium Ion Diffusion ... The muons themselves are quasi-static, most probably located in a 4h site between the [Li2N] plane and the Li(1)/Ni layer. ... The initial fall in ? results from an increase in muon hopping as the temperature is raised, while the subsequent rise originates from an increasing proportion of trapped and therefore static muons. ...

Andrew S. Powell; James S. Lord; Duncan H. Gregory; Jeremy J. Titman

2009-10-27T23:59:59.000Z

217

Energy spectrum of cosmic-ray muons  

Science Journals Connector (OSTI)

The energy spectrum of cosmic-ray muons at sea-level is calculated by the ... in good agreement with the observed data of muons with the zenith angles of 0° and ... the scaling model is valid up to the muon energy

H. Komori; K. Mitsui

218

Muon Cooling via Ionization Andrea Kay Forget  

E-Print Network [OSTI]

1 Muon Cooling via Ionization Andrea Kay Forget Department of Physics, Wayne State University, Detroit, Michigan 48202 Dated: August 7, 2006 Muons only live a few microseconds before they ultimately, and laser cooling) cannot be used to properly cool muons that are being used in proposed accelerators

Cinabro, David

219

Muon Studies in Organic Conductors [and Discussion  

Science Journals Connector (OSTI)

15 February 1995 research-article Muon Studies in Organic Conductors [and Discussion...Stoneham This paper contains a brief review of muon studies of organic conductors with emphasis...polymers. The species created by implanted muons in both semiconducting polymers and polymers...

1995-01-01T23:59:59.000Z

220

Intense Muon Physics Working Group Summary  

E-Print Network [OSTI]

The intense muon beams which will be available at a neutrino factory provide a unique opportunity for searching for physics beyond the standard model, both in lepton flavor violation and in the search for a permanent electric dipole moment for the muon. Other experiments which can use intense muon beams will also be possible.

B. Lee Roberts; Marco Grassi; Akira Sato

2005-10-20T23:59:59.000Z

Note: This page contains sample records for the topic "muon solenoid cms" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Muon Capture on the Proton  

E-Print Network [OSTI]

The MuCap experiment measures the singlet rate Lambda_S of muon capture on the proton. A negative muon beam is stopped in a time projection chamber filled with ultra-pure hydrogen gas at 10 bar and room temperature. In combination with the surrounding decay electron detectors, the lifetime of muons in hydrogen can be measured to determine LS to a final precision of 1%. The capture rate is then used to derive the nucleon's pseudoscalar form factor gP. Our first-stage result, gP= 7.3\\pm1., will soon be updated with the final analysis of the full statistics reducing the error by a factor of ~2.

P. Winter

2011-10-23T23:59:59.000Z

222

Muon Capture in Heavy Nuclei  

Science Journals Connector (OSTI)

The systematics of muon capture rates in complex nuclei is discussed in the closure approximation. It is shown that for calculations in infinite nuclear matter, the nuclear ground state can be reasonably approximated by an infinite Fermi gas. The closure approximation and Fermi-gas model for the nuclear ground state are then used in an analysis of the experimental capture rates in a large number of nuclei. We find that this procedure does allow one to satisfactorily interpret quantitatively the muon-capture rates in the heavier nuclei and that it is possible to interpret the analysis in a manner which is not inconsistent with a universal Fermi interaction. The possibility of using muon capture rates to determine a neutron-proton nuclear-radius difference is also explored but with negative results.

R. Klein

1966-06-17T23:59:59.000Z

223

Law of Conservation of Muons  

DOE R&D Accomplishments [OSTI]

A multiplicative selection rule for mu meson-electron transitions is proposed. A "muon parity" = -1 is considered for the muon and its neutrino, while the "muon parity" for all other particles is +1. The selection rule then states that (-1) exp(no. of initial (-1) parity particles) = (-1) exp(no. of final (-1) parity particles). Several reactions that are forbidden by an additive law but allowed by the multiplicative law are suggested; these reactions include mu{sup +} .> e{sup +} + nu{sub mu} + {ovr nu}{sub e}, e{sup -} + e{sup -} .> mu{sup -} + mu{sup -}, and muonium .> antimuonium (mu{sup +} + e{sup -} .> mu{sup -} + e{sup +}). An intermediate-boson hypothesis is suggested. (T.F.H.)

Feinberg, G.; Weinberg, S.

1961-02-00T23:59:59.000Z

224

Conceptual design report for the Solenoidal Tracker at RHIC  

SciTech Connect (OSTI)

The Solenoidal Tracker At RHIC (STAR) will search for signatures of quark-gluon plasma (QGP) formation and investigate the behavior of strongly interacting matter at high energy density. The emphasis win be the correlation of many observables on an event-by-event basis. In the absence of definitive signatures for the QGP, it is imperative that such correlations be used to identify special events and possible signatures. This requires a flexible detection system that can simultaneously measure many experimental observables. The physics goals dictate the design of star and it's experiment. To meet the design criteria, tracking, momentum analysis, and particle identification of most of the charged particles at midrapidity are necessary. The tracking must operate in conditions at higher than the expected maximum charged particle multiplicities for central Au + Au collisions. Particle identification of pions/kaons for p < 0.7 GeV/c and kaons/protons for p < 1 GeV/c, as well as measurement of decay particles and reconstruction of secondary vertices will be possible. A two-track resolution of 2 cm at 2 m radial distance from, the interaction is expected. Momentum resolution of {Delta}p/p {approximately} 0.02 at p = 0.1 GeV/c is required to accomplish the physics, and,{Delta}p/p of several percent at p = 10 GeV/c is sufficient to accurately measure the rapidly failing spectra at high Pt and particles from mini-jets and jets.

Not Available

1992-06-15T23:59:59.000Z

225

Conceptual design report for the Solenoidal Tracker at RHIC  

SciTech Connect (OSTI)

The Solenoidal Tracker At RHIC (STAR) will search for signatures of quark-gluon plasma (QGP) formation and investigate the behavior of strongly interacting matter at high energy density. The emphasis win be the correlation of many observables on an event-by-event basis. In the absence of definitive signatures for the QGP, it is imperative that such correlations be used to identify special events and possible signatures. This requires a flexible detection system that can simultaneously measure many experimental observables. The physics goals dictate the design of star and it`s experiment. To meet the design criteria, tracking, momentum analysis, and particle identification of most of the charged particles at midrapidity are necessary. The tracking must operate in conditions at higher than the expected maximum charged particle multiplicities for central Au + Au collisions. Particle identification of pions/kaons for p < 0.7 GeV/c and kaons/protons for p < 1 GeV/c, as well as measurement of decay particles and reconstruction of secondary vertices will be possible. A two-track resolution of 2 cm at 2 m radial distance from, the interaction is expected. Momentum resolution of {Delta}p/p {approximately} 0.02 at p = 0.1 GeV/c is required to accomplish the physics, and,{Delta}p/p of several percent at p = 10 GeV/c is sufficient to accurately measure the rapidly failing spectra at high Pt and particles from mini-jets and jets.

The STAR Collaboration

1992-06-15T23:59:59.000Z

226

Lateral distribution of muon pairs in deep underground muon showers  

Science Journals Connector (OSTI)

The lateral distribution of muon showers deep underground in the Utah muon detector has been studied. The results are presented in the form of a decoherence curve, which is defined to be the rate of pairs of coincident muons in two small detectors (as a function of their separation) divided by the product of the areas of the detectors. Rates are measured for separations from 1 to greater than 60 m for depths ranging from 2.4 × 105 gcm-2 to 5.6 × 105 gcm-2 and zenith angles ranging from 42.5 to 62.5 degrees. Significant improvements on previously reported data have been made due to increased detector-memory size, improved triggering efficiency, longer running time and better statistical analysis. When the decoherence curve is parameterized by the function R(x)=R0e-xx0 the value of the mean separation x0 at 47.5°, 2.4 × 105 gcm-2 is 11.21 ± 0.38 m. In a modified scaling model this separation suggests an average transverse momentum of roughly 0.65 GeV/c for muons from hadron-air collisions with energy > 10 TeV.

G. H. Lowe; H. E. Bergeson; J. W. Keuffel; M. O. Larson; J. L. Morrison; W. J. West

1976-06-01T23:59:59.000Z

227

Muon Identification in the LHCb experiment  

E-Print Network [OSTI]

A short summary of the LHCb muon identification procedure is given in this article. First, the muon system of LHCb is presented, together with some examples of physics measurements of the experiment where the muon identification is crucial. Then, the muon identification algorithm is introduced in three single steps. With this, the efficiency vs. misidentification rate is shown for MC simulated data. The way this method will be calibrated with real data is also seen. Finally, some preliminary muon identification results with proton-proton collisions at sqrt(s) = 900 GeV are presented.

X. Cid Vidal

2010-05-14T23:59:59.000Z

228

Description and performance of track and primary-vertex reconstruction with the CMS tracker  

E-Print Network [OSTI]

A description is provided of the software algorithms developed for the CMS tracker both for reconstructing charged-particle trajectories in proton-proton interactions and for using the resulting tracks to estimate the positions of the LHC luminous region and individual primary-interaction vertices. Despite the very hostile environment at the LHC, the performance obtained with these algorithms is found to be excellent. For $t\\bar{t}$ events under typical 2011 pileup conditions, the average track-reconstruction efficiency for promptly-produced charged particles with transverse momenta of $p_T$ > 0.9 GeV is 94% for pseudorapidities of |$\\eta$| < 0.9 and 85% for |$\\eta$| between 0.9 and 2.5. The inefficiency is caused mainly by hadrons that undergo nuclear interactions in the tracker material. For isolated muons, the corresponding efficiencies are essentially 100%. For isolated muons of $p_T$ = 100 GeV emitted at |$\\eta$| lower than 1.4, the resolutions are approximately 2.8% in $p_T$, and respectively, 10 mi...

Chatrchyan, Serguei; Sirunyan, Albert M; Tumasyan, Armen; Adam, Wolfgang; Bergauer, Thomas; Dragicevic, Marko; Erö, Janos; Fabjan, Christian; Friedl, Markus; Fruehwirth, Rudolf; Ghete, Vasile Mihai; Hartl, Christian; Hörmann, Natascha; Hrubec, Josef; Jeitler, Manfred; Kiesenhofer, Wolfgang; Knünz, Valentin; Krammer, Manfred; Krätschmer, Ilse; Liko, Dietrich; Mikulec, Ivan; Rabady, Dinyar; Rahbaran, Babak; Rohringer, Herbert; Schöfbeck, Robert; Strauss, Josef; Taurok, Anton; Treberer-Treberspurg, Wolfgang; Waltenberger, Wolfgang; Wulz, Claudia-Elisabeth; Mossolov, Vladimir; Shumeiko, Nikolai; Suarez Gonzalez, Juan; Alderweireldt, Sara; Bansal, Monika; Bansal, Sunil; Beaumont, Willem; Cornelis, Tom; De Wolf, Eddi A; Janssen, Xavier; Knutsson, Albert; Luyckx, Sten; Mucibello, Luca; Ochesanu, Silvia; Roland, Benoit; Rougny, Romain; Van Haevermaet, Hans; Van Mechelen, Pierre; Van Remortel, Nick; Van Spilbeeck, Alex; Blekman, Freya; Blyweert, Stijn; D'Hondt, Jorgen; Devroede, Olivier; Heracleous, Natalie; Kalogeropoulos, Alexis; Keaveney, James; Kim, Tae Jeong; Lowette, Steven; Maes, Michael; Olbrechts, Annik; Python, Quentin; Strom, Derek; Tavernier, Stefaan; Van Doninck, Walter; Van Lancker, Luc; Van Mulders, Petra; Van Onsem, Gerrit Patrick; Villella, Ilaria; Caillol, Cécile; Clerbaux, Barbara; De Lentdecker, Gilles; Favart, Laurent; Gay, Arnaud; Léonard, Alexandre; Marage, Pierre Edouard; Mohammadi, Abdollah; Perniè, Luca; Reis, Thomas; Seva, Tomislav; Thomas, Laurent; Vander Velde, Catherine; Vanlaer, Pascal; Wang, Jian; Adler, Volker; Beernaert, Kelly; Benucci, Leonardo; Cimmino, Anna; Costantini, Silvia; Crucy, Shannon; Dildick, Sven; Garcia, Guillaume; Klein, Benjamin; Lellouch, Jérémie; Mccartin, Joseph; Ocampo Rios, Alberto Andres; Ryckbosch, Dirk; Salva Diblen, Sinem; Sigamani, Michael; Strobbe, Nadja; Thyssen, Filip; Tytgat, Michael; Walsh, Sinead; Yazgan, Efe; Zaganidis, Nicolas; Basegmez, Suzan; Beluffi, Camille; Bruno, Giacomo; Castello, Roberto; Caudron, Adrien; Ceard, Ludivine; Da Silveira, Gustavo Gil; De Callatay, Bernard; Delaere, Christophe; Du Pree, Tristan; Favart, Denis; Forthomme, Laurent; Giammanco, Andrea; Hollar, Jonathan; Jez, Pavel; Komm, Matthias; Lemaitre, Vincent; Liao, Junhui; Michotte, Daniel; Militaru, Otilia; Nuttens, Claude; Pagano, Davide; Pin, Arnaud; Piotrzkowski, Krzysztof; Popov, Andrey; Quertenmont, Loic; Selvaggi, Michele; Vidal Marono, Miguel; Vizan Garcia, Jesus Manuel; Beliy, Nikita; Caebergs, Thierry; Daubie, Evelyne; Hammad, Gregory Habib; Alves, Gilvan; Correa Martins Junior, Marcos; Dos Reis Martins, Thiago; Pol, Maria Elena; Henrique Gomes E Souza, Moacyr; Aldá Júnior, Walter Luiz; Carvalho, Wagner; Chinellato, Jose; Custódio, Analu; Da Costa, Eliza Melo; De Jesus Damiao, Dilson; De Oliveira Martins, Carley; Fonseca De Souza, Sandro; Malbouisson, Helena; Malek, Magdalena; Matos Figueiredo, Diego; Mundim, Luiz; Nogima, Helio; Prado Da Silva, Wanda Lucia; Santaolalla, Javier; Santoro, Alberto; Sznajder, Andre; Tonelli Manganote, Edmilson José; Vilela Pereira, Antonio; Bernardes, Cesar Augusto; De Almeida Dias, Flavia; Tomei, Thiago; De Moraes Gregores, Eduardo; Mercadante, Pedro G; Novaes, Sergio F; Padula, Sandra; Genchev, Vladimir; Iaydjiev, Plamen; Marinov, Andrey; Piperov, Stefan; Rodozov, Mircho; Sultanov, Georgi; Vutova, Mariana; Dimitrov, Anton; Glushkov, Ivan; Hadjiiska, Roumyana; Kozhuharov, Venelin; Litov, Leander; Pavlov, Borislav; Petkov, Peicho; Bian, Jian-Guo; Chen, Guo-Ming; Chen, He-Sheng; Chen, Mingshui; Du, Ran; Jiang, Chun-Hua; Liang, Dong; Liang, Song; Meng, Xiangwei; Plestina, Roko; Tao, Junquan; Wang, Xianyou; Wang, Zheng; Asawatangtrakuldee, Chayanit; Ban, Yong; Guo, Yifei; Li, Qiang; Li, Wenbo; Liu, Shuai; Mao, Yajun; Qian, Si-Jin; Wang, Dayong; Zhang, Linlin; Zou, Wei; Avila, Carlos; Carrillo Montoya, Camilo Andres; Chaparro Sierra, Luisa Fernanda; Florez, Carlos; Gomez, Juan Pablo; Gomez Moreno, Bernardo; Sanabria, Juan Carlos; Godinovic, Nikola; Lelas, Damir; Polic, Dunja; Puljak, Ivica; Antunovic, Zeljko; Kovac, Marko; Brigljevic, Vuko; Kadija, Kreso; Luetic, Jelena; Mekterovic, Darko; Morovic, Srecko; Sudic, Lucija; Attikis, Alexandros; Mavromanolakis, Georgios; Mousa, Jehad; Nicolaou, Charalambos; Ptochos, Fotios; Razis, Panos A; Finger, Miroslav; Finger Jr, Michael; Abdelalim, Ahmed Ali; Assran, Yasser; Elgammal, Sherif; Ellithi Kamel, Ali; Mahmoud, Mohammed; Radi, Amr; Kadastik, Mario; Müntel, Mait; Murumaa, Marion; Raidal, Martti; Rebane, Liis; Tiko, Andres; Eerola, Paula; Fedi, Giacomo; Voutilainen, Mikko

2014-01-01T23:59:59.000Z

229

Concept of the CMS Trigger Supervisor  

E-Print Network [OSTI]

The Trigger Supervisor is an online software system designed for the CMS experiment at CERN. Its purpose is to provide a framework to set up, test, operate and monitor the trigger components on one hand and to manage their interplay and the information exchange with the run control part of the data acquisition system on the other. The Trigger Supervisor is conceived to provide a simple and homogeneous client interface to the online software infrastructure of the trigger subsystems. This document specifies the functional and non-functional requirements, design and operational details, and the components that will be delivered in order to facilitate a smooth integration of the trigger software in the context of CMS.

Magrans de Abril, Ildefons; Varela, Joao

2006-01-01T23:59:59.000Z

230

Muon Fluxes From Dark Matter Annihilation  

E-Print Network [OSTI]

We calculate the muon flux from annihilation of the dark matter in the core of the Sun, in the core of the Earth and from cosmic diffuse neutrinos produced in dark matter annihilation in the halos. We consider model-independent direct neutrino production and secondary neutrino production from the decay of taus produced in the annihilation of dark matter. We illustrate how muon energy distribution from dark matter annihilation has a very different shape than muon flux from atmospheric neutrinos. We consider both the upward muon flux, when muons are created in the rock below the detector, and the contained flux when muons are created in the (ice) detector. We contrast our results to the ones previously obtained in the literature, illustrating the importance of properly treating muon propagation and energy loss. We comment on neutrino flavor dependence and their detection.

Arif Emre Erkoca; Mary Hall Reno; Ina Sarcevic

2009-06-23T23:59:59.000Z

231

A Comparative Study of RF and Induction Linac Approaches to Phase Rotation of a Muon Bunch in the Production Region of a muon + - muon- Collider  

E-Print Network [OSTI]

until pion decay is Fig.l: Muon energy versus arrival time.we therefore chose a pion/muon kinetic energy interval 50 toAs the pions/muons in this energy interval propagate a

Turner, W.C.

2011-01-01T23:59:59.000Z

232

A Comparative Study of RF and Induction Linac Approaches to Phase Rotation of a Muon Bunch in the Production Region of a muon + - muon- Collider  

E-Print Network [OSTI]

Approach to Phase Rotation of a Muon Bunch in the Productionto Phase Rotation of a Muon Bunch in the Production Regionthe selection of input muons. Some work has been done on the

Turner, W.C.

2011-01-01T23:59:59.000Z

233

Development of the bus joint for the ITER Central Solenoid  

SciTech Connect (OSTI)

The terminations of the Central Solenoid (CS) modules are connected to the bus extensions by joints located outside the CS in the gap between the CS and Torodial Field (TF) assemblies. These joints have very strict space limitations. Low resistance is a common requirement for all ITER joints. In addition, the CS bus joints will experience and must be designed to withstand significant variation in the magnetic field of several tenths of a Tesla per second during initiation of plasma. The joint resistance is specified to be less than 4 nOhm. The joints also have to be soldered in the field and designed with the possibility to be installed and dismantled in order to allow cold testing in the cold test facility. We have developed coaxial joints that meet these requirements and have demonstrated the feasibility to fabricate and assemble them in the vertical configuration. We introduced a coupling cylinder with superconducting strands soldered to the surface of the cable that can be installed in the ITER assembly hall and at the Cold Test Facility. This cylinder serves as a transition area between the CS module and the bus extension. We made two racetrack samples and tested four bus joints in our Joint Test Apparatus. Resistance of the bus joints was measured by a decay method and by a microvoltmeter; the value of the current was measured by the Hall probes. This measurement method was verified in the previous tests. The resistance of the joints varied insignificantly from 1.5 to 2 nOhm. One of the challenges associated with a soldered joint is the inability to use corrosive chemicals that are difficult to clean. This paper describes our development work on cable preparation, chrome removal, compaction, soldering, and final assembly and presents the test results.

Martovetsky, Nicolai N [ORNL] [ORNL; Irick, David Kim [ORNL] [ORNL; Kenney, Steven J [ORNL] [ORNL

2013-01-01T23:59:59.000Z

234

U.S. CMS - U.S. CMS @ Work - Data and Computing - Data Operations - Data  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

User Space at US CMS Tier-2 Centers and the FNAL LPC User Space at US CMS Tier-2 Centers and the FNAL LPC Overview When running jobs on large amounts of data, many users will need to write output files of substantial size -- larger than can be accommodated by the grid output sandbox. Additionally, it can be very useful to write this output in a way that it can be read back in easily by subsequent grid jobs. CMS has a mechanism for this. Computing sites will support a /store/user area in their storage systems to host user-generated data. CRAB can be instructed to write job outputs to this area through the SRM interface. Through the magic of the grid, no matter where your job actually runs, and no matter where the output is created, the output can be automatically transferred to whatever system is hosting your own /store/user area. Then,

235

Simulation of large acceptance LINAC for muons  

SciTech Connect (OSTI)

There has been a recent need for muon accelerators not only for future Neutrino Factories and Muon Colliders but also for other applications in industry and medical use. We carried out simulations on a large-acceptance muon linac with a new concept 'mixed buncher/acceleration'. The linac can accept pions/muons from a production target with large acceptance and accelerate muon without any beam cooling which makes the initial section of muon-linac system very compact. The linac has a high impact on Neutrino Factory and Muon Collider (NF/MC) scenario since the 300-m injector section can be replaced by the muon linac of only 10-m length. The current design of the linac consists of the following components: independent 805-MHz cavity structure with 6- or 8-cm-radius aperture window; injection of a broad range of pion/muon energies, 10-100 MeV, and acceleration to 150 - 200 MeV. Further acceleration of the muon beam are relatively easy since the beam is already bunched.

Miyadera, H [Los Alamos National Laboratory; Kurennoy, S [Los Alamos National Laboratory; Jason, A J [Los Alamos National Laboratory

2010-01-01T23:59:59.000Z

236

Muon spin resonance by strong pulsed r.f. field with pulsed muons  

Science Journals Connector (OSTI)

Muon spin resonance experiments have been performed for...+ in H2O and for some other cases, and the first observation has been made of the time-differential pattern of muon spin resonance, namely, spin precessio...

Y. Kitaoka; M. Takigawa; H. Yasuoka; M. Itoh; S. Takagi; Y. Kuno…

1982-05-01T23:59:59.000Z

237

Muon capture in Ar. The muon lifetime and yields of Cl isotopes  

Science Journals Connector (OSTI)

The time and energy spectra of ? rays, accompanying negative muon capture in a 40Ar target, have been measured using Ge detectors. The results of measuring the muon lifetime in 40Ar and yields of different Cl and...

A. V. Klinskikh; S. Brianson; V. B. Brudanin…

2008-06-01T23:59:59.000Z

238

Muon bonding versus muonium formation: Muon-Spin-Relaxation in ?-Al2O3  

Science Journals Connector (OSTI)

Results of Muon-Spin-Relaxation (?SR) experiments on well...2O3...) are reported. Major issue in this study is the controversy of muon bonding or muonium formation in insulators. Transverse ... applied field. The...

C. Boekema; K. C. Chan; R. L. Lichti; A. B. Denison; D. W. Cooke…

1986-12-01T23:59:59.000Z

239

Muon Catalyzed Fusion and Basic Muon Reactions in Deuterium and Hydrogen  

Science Journals Connector (OSTI)

By now, the kinetics of muon catalyzed fusion in pure D 2...and in H-D mixtures is understood in terms of the basic underlying processes. It provides rich information about muon induced few-body r...

Peter Kammel

1993-01-01T23:59:59.000Z

240

Precision Muon Reconstruction in Double Chooz  

E-Print Network [OSTI]

We describe a muon track reconstruction algorithm for the reactor anti-neutrino experiment Double Chooz. The Double Chooz detector consists of two optically isolated volumes of liquid scintillator viewed by PMTs, and an Outer Veto above these made of crossed scintillator strips. Muons are reconstructed by their Outer Veto hit positions along with timing information from the other two detector volumes. All muons are fit under the hypothesis that they are through-going and ultrarelativistic. If the energy depositions suggest that the muon may have stopped, the reconstruction fits also for this hypothesis and chooses between the two via the relative goodness-of-fit. In the ideal case of a through-going muon intersecting the center of the detector, the resolution is ~40 mm in each transverse dimension. High quality muon reconstruction is an important tool for reducing the impact of the cosmogenic isotope background in Double Chooz.

Abe, Y; Barriere, J C; Baussan, E; Bekman, I; Bergevin, M; Bezerra, T J C; Bezrukov, L; Blucher, E; Buck, C; Busenitz, J; Cabrera, A; Caden, E; Camilleri, L; Carr, R; Cerrada, M; Chang, P -J; Chauveau, E; Chimenti, P; Collin, A P; Conover, E; Conrad, J M; Crespo-Anadón, J I; Crum, K; Cucoanes, A; Damon, E; Dawson, J V; Dietrich, D; Djurcic, Z; Dracos, M; Elnimr, M; Etenko, A; Fallot, M; von Feilitzsch, F; Felde, J; Fernandes, S M; Fischer, V; Franco, D; Franke, M; Furuta, H; Gil-Botella, I; Giot, L; Göger-Neff, M; Gonzalez, L F G; Goodenough, L; Goodman, M C; Grant, C; Haag, N; Hara, T; Haser, J; Hofmann, M; Horton-Smith, G A; Hourlier, A; Ishitsuka, M; Jochum, J; Jollet, C; Kaether, F; Kalousis, L N; Kamyshkov, Y; Kaplan, D M; Kawasaki, T; Kemp, E; de Kerret, H; Kryn, D; Kuze, M; Lachenmaier, T; Lane, C E; Lasserre, T; Letourneau, A; Lhuillier, D; Lima, H P; Lindner, M; no, J M López-Casta; LoSecco, J M; Lubsandorzhiev, B; Lucht, S; Maeda, J; Mariani, C; Maricic, J; Martino, J; Matsubara, T; Mention, G; Meregaglia, A; Miletic, T; Milincic, R; Minotti, A; Nagasaka, Y; Nikitenko, Y; Novella, P; Obolensky, M; Oberauer, L; Onillon, A; Osborn, A; Palomares, C; Pepe, I M; Perasso, S; Pfahler, P; Porta, A; Pronost, G; Reichenbacher, J; Reinhold, B; Röhling, M; Roncin, R; Roth, S; Rybolt, B; Sakamoto, Y; Santorelli, R; Schilithz, A C; Schönert, S; Schoppmann, S; Shaevitz, M H; Sharankova, R; Shimojima, S; Sibille, V; Sinev, V; Skorokhvatov, M; Smith, E; Spitz, J; Stahl, A; Stancu, I; Stokes, L F F; Strait, M; Stüken, A; Suekane, F; Sukhotin, S; Sumiyoshi, T; Sun, Y; Svoboda, R; Terao, K; Tonazzo, A; Thi, H H Trinh; Valdiviesso, G; Vassilopoulos, N; Veyssiere, C; Vivier, M; Wagner, S; Watanabe, H; Wiebusch, C; Winslow, L; Wurm, M; Yang, G; Yermia, F; Zimmer, V

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "muon solenoid cms" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Future Muon Dipole Moment Measurements  

E-Print Network [OSTI]

From the famous experiments of Stern and Gerlach to the present, measurements of magnetic dipole moments, and searches for electric dipole moments of ``elementary'' particles have played a major role in our understanding of sub-atomic physics. In this talk I discuss the progress on measurements and theory of the magnetic dipole moment of the muon. I also discuss a new proposal to search for a permanent electric dipole moment (EDM) of the muon and put it into the more general context of other EDM searches. These experiments, along with searches for the lepton flavor violating decays $\\mu \\to e \\gamma$ and $\\mu^- + A \\to e^- + A$, provide a path to the high-energy frontier through precision measurements.

B. Lee Roberts

2004-12-12T23:59:59.000Z

242

Radiative Decay of the Muon  

Science Journals Connector (OSTI)

The radiative decay of the muon, ?+?e++?+?e+?¯?, has been measured using muons from the Columbia University Nevis synchrocyclotron. The decay products e+ and ? were observed at relative angles near 180°, using scintillation counters and two 9-in.×10-in. NaI crystals, which enabled simultaneous measurement of the positron and ? energies. The pulses from the crystals were displayed on oscilloscopes and photographed, and the measured amplitudes of these pulses were calibrated using the positron spectrum of the nonradiative decay. The two-dimensional energy spectrum for positrons and ?'s was obtained for about 900 events, after subtraction of background. This spectrum and the measured rate, obtained by normalizing to the nonradiative decay, were compared with theoretical predictions for the radiative decay. The results were in good agreement with the theory, within statistics, for the case of pure V-A coupling.

E. Bogart; E. DiCapua; P. Némethy; A. Strelzoff

1967-04-25T23:59:59.000Z

243

Muon bremsstrahlung on heavy atoms  

Science Journals Connector (OSTI)

The cross section for high energy muon bremsstrahlung on heavy atoms is calculated without the use of the Born approximation. It is shown that the correction to the Born approximation in the region of momentum transfers q of the order of ?c has the same order of magnitude as the well-known correction of Davies, Bethe, and Maximon. It is shown also that these corrections have different signs and nearly compensate each other.

Yu. M. Andreev and E. V. Bugaev

1997-02-01T23:59:59.000Z

244

R&D Toward a Neutrino Factory and Muon Collider  

E-Print Network [OSTI]

electrons of the same energy, muons experience negligibleBeam-beam tune shift Muons per bunch Beam stored energy (kJ)results in a muon beam having a large energy spread and very

Zisman, Michael S

2011-01-01T23:59:59.000Z

245

R&D PROPOSAL FOR THE NATIONAL MUON ACCELERATOR PROGRAM  

E-Print Network [OSTI]

specification for the stored muon energy is 25 GeV and theradiation allows high-energy muon bunches to be stored in ato deliver O(10 21 ) low energy muons per year within the

Zisman, Michael S.

2011-01-01T23:59:59.000Z

246

Equivalent dose rate by muons to the human body  

Science Journals Connector (OSTI)

......strongly on thickness(6). Muons lose energy in the atmosphere. The average rate of muon energy loss is where a(E) is the ionisation...coefficients as a function of muon energy for isotropic geometrical conditions......

I. Bacioiu

2011-11-01T23:59:59.000Z

247

PROTON BEAM REQUIREMENTS FOR A NEUTRINO FACTORY AND MUON COLLIDER  

E-Print Network [OSTI]

target concept. 4.1. Beam Energy The muons captured by theto bring the muons to the desired energy. The short lifetimeAt the energy frontier, the fact that the muon is a point

Zisman, Michael S.

2010-01-01T23:59:59.000Z

248

Frictional accumulation of negative muons and its application  

Science Journals Connector (OSTI)

A novel method is proposed for the efficient conversion of intermediate energy negative muons into a low-energy muon beam. It is based on using an electric field to eject muons from a moderator consisting of a la...

D. Taqqu

1996-01-01T23:59:59.000Z

249

Some thoughts on the production of muons for fusion catalysis  

Science Journals Connector (OSTI)

For muon-catalyzed fusion to be of practical interest, a very efficient means of producing muons must be found. We describe here some schemes for producing muons that may be more energy efficient than any heretof...

George Chapline; Ralph Moir

1986-09-01T23:59:59.000Z

250

Positive muon behavior in KCl with and without F centers  

Science Journals Connector (OSTI)

Positive muon behavior in KCl containing F centers has been studied. The muon spin depolarization rate showed a maximum near ... probably due to the fact that free positive muons are trapped by F centers in KCl. ...

Masao Doyama; T. Hatano; Y. Suzuki; R. Nakai; R. Yamamoto…

1984-01-01T23:59:59.000Z

251

Muon Production in Relativistic Cosmic-Ray Interactions  

E-Print Network [OSTI]

enough to study high p T muon production in air showers.production of far forward muons, potentially probing nuclearto this study of high p T muons. This work was supported in

Klein, Spencer

2010-01-01T23:59:59.000Z

252

The US Muon Accelerator Program (MAP)  

SciTech Connect (OSTI)

The US Department of Energy Office of High Energy Physics has recently approved a Muon Accelerator Program (MAP). The primary goal of this effort is to deliver a Design Feasibility Study for a Muon Collider after a 7 year R&D program. This paper presents a brief physics motivation for, and the description of, a Muon Collider facility and then gives an overview of the program. I will then describe in some detail the primary components of the effort.

Bross, Alan D.; /Fermilab

2010-12-01T23:59:59.000Z

253

The US Muon Accelerator Program (MAP)  

SciTech Connect (OSTI)

The US Department of Energy Office of High Energy Physics has recently approved a Muon Accelerator Program (MAP). The primary goal of this effort is to deliver a Design Feasibility Study for a Muon Collider after a 7 year R and D program. This paper presents a brief physics motivation for, and the description of, a Muon Collider facility and then gives an overview of the program. I will then describe in some detail the primary components of the effort.

Bross, Alan D. [Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510 (United States)

2011-10-06T23:59:59.000Z

254

Muon Capture in Gaseous Deuterium  

Science Journals Connector (OSTI)

We report the results of an experiment performed to measure the muon nuclear capture rate by free deuterons. The muons were slowed down in ultrapure gaseous hydrogen at 7.6 atm and 293 °K, containing 5% of deuterium. A special target was used, in which a system of gas proportional counters, working with the (H2 + D2) gaseous mixture itself, was operating. Neutrons from the capture reactions were detected using liquid scintillation counters, and the ?-ray background was eliminated by pulse-shape discrimination. The experimental result is ?exp=(445±60) sec-1, which is consistent with muon-electron universality and with the assumption that the nuclear capture proceeds from the doublet spin state of the ?d muonic atoms. Combining the present experimental value with a previous result obtained with a liquid-hydrogen deuterated target, one obtains a ratio between the axial-vector and vector coupling constants given by gA,?gV,?=-1.35±0.1.

A. Bertin; A. Vitale; A. Placci; E. Zavattini

1973-12-01T23:59:59.000Z

255

Muon to electron conversion: how to find an electron in a muon haystack  

Science Journals Connector (OSTI)

...year' compiled and edited by Michael Pepper Muon to electron conversion: how to find an electron in a muon haystack A. Kurup 1 2 * * a.kurup@imperial...processes that are forbidden by the SM, such as muon to electron conversion. This paper will...

2010-01-01T23:59:59.000Z

256

High energy leptons from muons in transit  

E-Print Network [OSTI]

The differential energy distribution for electrons and taus produced from lepton pair production from muons in transit through materials is numerically evaluated. We use the differential cross section to calculate underground lepton fluxes from an incident atmospheric muon flux, considering contributions from both conventional and prompt fluxes. An approximate form for the charged current differential neutrino cross section is provided and used to calculate single lepton production from atmospheric neutrinos. We compare the fluxes of underground leptons produced from incident muons with those produced from incident neutrinos and photons from muon bremsstrahlung. We discuss their relevance for underground detectors.

Alexander Bulmahn; Mary Hall Reno

2009-12-08T23:59:59.000Z

257

Muons from high-energy cosmic photino  

Science Journals Connector (OSTI)

The muon production at photino-nucleon $$(\\bar \\gamma \\mathcal{N})$$ interaction for high-energy photino (E?)104GeV)...

V. S. Berezinsky; E. V. Bugaev; E. S. Zaslavskaya

258

Low energy atmospheric muon neutrinos in MACRO  

E-Print Network [OSTI]

The flux of low energy neutrinos (~ 4 GeV) has been studied with the MACRO detector at Gran Sasso via the detection of muon neutrinos interactions inside the apparatus, and of upward-going stopping muons. Data collected in ~3 y with the full apparatus were analyzed. The results are compatible with a deficit of the flux of atmospheric muon neutrinos from below, and no reduction from above, with respect to Monte Carlo predictions. The deficit and the angular distributions are interpreted in terms of neutrino oscillations, and compared with the MACRO results on the upward throughgoing muons (~ 100 GeV).

M. Spurio; for the MACRO Collaboration

1998-08-01T23:59:59.000Z

259

Upward Showering Muons in Super?Kamiokande  

Science Journals Connector (OSTI)

A small subset of neutrino?induced upward going muons in the Super?Kamiokande detector consists of high energy muons that undergo radiative energy losses through bremsstrahlung e + e ? pair production and photo?nuclear interactions. The mean energy of the parent neutrinos of these showering upward muons is approximately 1 TeV allowing the selection of a high energy sample of neutrinos. We present physics(mainly oscillation analysis) as well as astrophysical results with the upward showering muon dataset using about 1680 days of Super?K?I data.

Shantanu Desai; Super?Kamiokande Collaboration

2006-01-01T23:59:59.000Z

260

Magnetic moment of the negative muon  

Science Journals Connector (OSTI)

The most accurate value of the negative-muon magnetic moment, ??-=3.183 345(10)?p, is obtained by combining the negative-muon mass from x-ray transitions in muonic atoms and the reanalyzed negative-muon g factor with the proton magnetic moment in Bohr magnetons. The fractional uncertainty of 3.1×10-6 is 15 times more accurate than any previous direct measurement. The obtained ratio of the magnetic moments of the positive muon and the negative muon, ??+/??-=1.000 000 2(31), provides a test of CPT invariance at the level of 3 ppm. The negative-muon g factor g?- and the magnetic moment anomaly a?- derived for a test of CPT theorem are obtained from an approach now made possible using the new value of the negative-muon magnetic moment. To substantially improve the verification of the CPT theorem for the muon g factor, a much more precise value for ??-/?p is needed to determine the anomalous g factor a?- for the new Brookhaven National Laboratory muon g-2 experiment.

X. Fei

1994-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "muon solenoid cms" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Magnetic Moment of the Positive Muon  

Science Journals Connector (OSTI)

The magnetic moment of the positive muon has been measured relative to that of the proton by determining its precession frequency in a magnetic field measured by proton NMR. With both protons and muons bound in a spherical sample of water, the result is ????p?=3.183 362±0.000 030 (9.4 ppm). Including uncertainties due to the chemical environment of the muon, the result for free muons and protons is ???p=3.183 330±0.000 044 (14 ppm) which is consistent with recent measurements of the hyperfine splitting of muonium.

D. P. Hutchinson; F. L. Larsen; N. C. Schoen; D. I. Sober; A. S. Kanofsky

1970-06-01T23:59:59.000Z

262

Laser ion source with solenoid for Brookhaven National Laboratory-electron beam ion source  

SciTech Connect (OSTI)

The electron beam ion source (EBIS) preinjector at Brookhaven National Laboratory (BNL) is a new heavy ion-preinjector for relativistic heavy ion collider (RHIC) and NASA Space Radiation Laboratory (NSRL). Laser ion source (LIS) is a primary ion source provider for the BNL-EBIS. LIS with solenoid at the plasma drift section can realize the low peak current ({approx}100 {mu}A) with high charge ({approx}10 nC) which is the BNL-EBIS requirement. The gap between two solenoids does not cause serious plasma current decay, which helps us to make up the BNL-EBIS beamline.

Kondo, K.; Okamura, M. [Collider-Accelerator Department, Brookhaven National Laboratory, New York (United States); Yamamoto, T. [Cooperative Major in Nuclear Energy, Waseda University, Tokyo (Japan); Sekine, M. [Department of Nuclear Engineering, Tokyo Institute of Technology, Tokyo (Japan)

2012-02-15T23:59:59.000Z

263

Laser ion source with solenoid for Brookhaven National Laboratory-electron beam ion source  

SciTech Connect (OSTI)

The electron beam ion source (EBIS) preinjector at Brookhaven National Laboratory (BNL) is a new heavy ion-preinjector for relativistic heavy ion collider (RHIC) and NASA Space Radiation Laboratory (NSRL). Laser ion source (LIS) is a primary ion source provider for the BNL-EBIS. LIS with solenoid at the plasma drift section can realize the low peak current ({approx}100 {micro}A) with high charge ({approx}10 nC) which is the BNL-EBIS requirement. The gap between two solenoids does not cause serious plasma current decay, which helps us to make up the BNL-EBIS beamline.

Kondo K.; Yamamoto, T.; Sekine, M.; Okamura, M.

2012-02-22T23:59:59.000Z

264

Magnetic Cavern Solenoid R&D A. Bross, V.V Kashikhin and A.V. Zlobin  

E-Print Network [OSTI]

Magnetic Cavern Solenoid R&D A. Bross, V.V Kashikhin and A.V. Zlobin Fermilab (Feb. 16, 2010) #12 Cavern design concept · · · STL is placed inside the external support structure (cylindrical strongback) · Cavern Wall?Solenoid strongback Thermal shield STL cable Invar pipe with SC strands, stabilizer and LHe

McDonald, Kirk

265

Muon Flux at the Geographical South Pole  

E-Print Network [OSTI]

The muon flux at the South-Pole was measured for five zenith angles, $0^{\\circ}$, $15^{\\circ}$, $35^{\\circ}$, $82.13^{\\circ}$ and $85.15^{\\circ}$ with a scintillator muon telescope incorporating ice Cherenkov tank detectors as the absorber. We compare the measurements with other data and with calculations.

X. Bai; T. K. Gaisser; A. Karle; K. Rawlins; G. M. Spiczak; Todor Stanev

2006-02-17T23:59:59.000Z

266

Performance of solenoids versus quadrupoles in focusing and energy selection of laser accelerated protons  

Science Journals Connector (OSTI)

Using laser accelerated protons or ions for various applications—for example in particle therapy or short-pulse radiographic diagnostics—requires an effective method of focusing and energy selection. We derive an analytical scaling for the performance of a solenoid compared with a doublet/triplet as function of the energy, which is confirmed by TRACEWIN simulations. Generally speaking, the two approaches are equivalent in focusing capability, if parameters are such that the solenoid length approximately equals its diameter. The scaling also shows that this is usually not the case above a few MeV; consequently, a solenoid needs to be pulsed or superconducting, whereas the quadrupoles can remain conventional. It is also important that the transmission of the triplet is found only 25% lower than that of the equivalent solenoid. Both systems are equally suitable for energy selection based on their chromatic effect as is shown using an initial distribution following the RPA simulation model by Yan et al. [Phys. Rev. Lett. 103, 135001 (2009].

Ingo Hofmann

2013-04-03T23:59:59.000Z

267

Field-reversed configuration formation scheme utilizing a spheromak and solenoid induction  

E-Print Network [OSTI]

Field-reversed configuration formation scheme utilizing a spheromak and solenoid induction S. P FRC formation technique is described, where a spheromak transitions to a FRC with inductive current are suppressed; spheromaks with a lighter majority species, such as neon and helium, either display a terminal

Ji, Hantao

268

A HIGH-FIELD PULSED SOLENOID MAGNET FOR LIQUID METAL TARGET STUDIES  

E-Print Network [OSTI]

studies have been car- ried out for rotating-band targets, a tantalum/water target, and a liquid parameters for a pulsed solenoid, including the magnet cryogenic sys- tem and power supply, that can generate, the operation of rf cavities near high-power targets, and evaluation of target materials. Mercury Jet + Proton

McDonald, Kirk

269

Worcester 1 Inch Solenoid Actuated Gas Operated VPS System Ball Valve  

SciTech Connect (OSTI)

1 inch Gas-operated full-pod ball valve incorporates a solenoid and limit switches as integral park of the actuator. The valve is normally open and fails safe to the closed position. The associated valve position switch is class GS.

MISKA, C.R.

2000-11-13T23:59:59.000Z

270

Recirculating Linac Accelerators For Future Muon Facilities  

SciTech Connect (OSTI)

Neutrino Factories (NF) and Muon Colliders (MC) require rapid acceleration of shortlived muons to multi-GeV and TeV energies. A Recirculating Linear Accelerator (RLA) that uses superconducting RF structures can provide exceptionally fast and economical acceleration to the extent that the focusing range of the RLA quadrupoles allows each muon to pass several times through each high-gradient cavity. A new concept of rapidly changing the strength of the RLA focusing quadrupoles as the muons gain energy is being developed to increase the number of passes that each muon will make in the RF cavities, leading to greater cost effectiveness. We discuss the optics and technical requirements for RLA designs, using RF cavities capable of simultaneous acceleration of both m+ and m- species. The design will include the optics for the multi-pass linac and droplet-shaped return arcs.

Yves Roblin, Alex Bogacz, Vasiliy Morozov, Kevin Beard

2012-04-01T23:59:59.000Z

271

Magnetic Moment of the Positive Muon  

Science Journals Connector (OSTI)

The magnetic moment of the positive muon has been redetermined in terms of proton moments using a precession technique. The sensitivity achieved yields an error of 13 parts per million. The muons are stopped in various targets in a homogeneous magnetic field. The anisotropic distribution of the decay electrons relative to the muon spin direction permits the measurement of the spin precession frequency. The proton spin resonance is measured in the same field, yielding f?fp=3.18338±0.00004. This result may be combined with that of other experiments, the muon g factor, and the ratio of electron cyclotron frequency to proton resonance, fefp, to obtain a more precise evaluation of the muon mass in terms of electron masses. m?me equals 206.765±0.005.

David P. Hutchinson; Jack Menes; G. Shapiro; A. M. Patlach

1963-08-01T23:59:59.000Z

272

Radiative muon absorption in calcium  

Science Journals Connector (OSTI)

The photon spectrum from radiative absorption of negative muons in Ca40 has been measured with a high-resolution pair spectrometer. The data are analyzed in order to determine the induced pseudoscalar coupling constant gp in nuclear matter. When compared to models which use a realistic nuclear response function and avoid the closure approximation, a value of gp/gA=4.0±1.5 is obtained, which indicates a quenching of this coupling compared to the nucleonic value by a factor 0.57±0.25.

A. Frischknecht; W. Stehling; G. Strassner; P. Truöl; J. C. Alder; C. Joseph; J. F. Loude; J. P. Perroud; D. Ruegger; T. M. Tran; W. Dahme; H. Panke; R. Kopp

1985-11-01T23:59:59.000Z

273

Muon Capture in Oxygen-16  

Science Journals Connector (OSTI)

The muon capture rate in oxygen is used as a means for measuring the induced pseudoscalar coupling constant (CP) of weak interactions. The capture rate between the JP=0+ ground state of O16 and the 0-, 1-, 2-, and 3- states of N16 are calculated as a function of CP with different nuclear models. Using the experimental values of the transition rates, we then determine CP. We find that the transition rate, and therefore CP, depends strongly on the nuclear model. We conclude that 5

Vincent Gillet and David A. Jenkins

1965-10-11T23:59:59.000Z

274

U.S. CMS - U.S. CMS @ Work - Research Program Office/Management - Software  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

2-10 2-10 Fermilab Software and Computing Oversight Panel Review of the U.S. CMS Software and Computing Project October 24-25, 2002 Purpose: Review of the status the U.S. CMS Software and Computing Project Report to Fermilab Project Oversight and Project Management. See Charge to the SCOP Agenda Logistics Attendees Documentation Report Agenda: (email suggestions to Bakul Banerjee) The meeting will be held Conference Room: Black Hole, WH2W on both days. Copies of the slides presented will be available for the meeting. Thursday October 24, 2002 Start of Meeting 8:30am Chicago Time (other time zones) , 8:00am Video Setup Time Title Speaker Duration 8:00 AM Setup of Video 8:30 AM Executive Session (closed) Panel 15' 8:45 AM Welcome / Charge H.Montgomery 15'

275

U.S. CMS - U.S. CMS @ Work - Research Program Office/Management - Software  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

05 05 Fermilab Software and Computing Oversight Panel Review of the U.S. CMS Software and Computing Project October 25-27, 2001 Purpose: Review of the status the U.S. CMS Software and Computing Project Report to Fermilab Project Oversight and Project Management See Charge to the SCOP Agenda Logistics Attendees Documentation Summary Tentative Agenda: (email suggestions to bauerdick@fnal.gov) Copies of the slides presented will be available for the meeting. Thursday October 25, 2001 Start of Meeting 3pm Chicago Time (other time zones) , 2:45pm Video Setup Time Topic Speaker or Discussion Coordinator 3:00 pm Executive Session: Initial discussion, reading session (see Documentation) Chair 60' 4:00 pm Welcome, Charge to Committee Mike Shaevitz 15' 4:15 pm Project Overview and

276

U.S. CMS - U.S. CMS @ Work - Research Program Office/Management - Software  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

4-01 4-01 Fermilab Software and Computing Oversight Panel (SCOP) Review of the U.S. CMS Software and Computing Project January 6, 2004 Charge to the SCOP Agenda Logistics Attendees Documentation Agenda: Copies of the slides presented will be available for the meeting. Tuesday, January 6, 2004 Start of Meeting 8:30am Chicago Time (other time zones) Time Title Speaker Duration 8:00 AM Video Setup 8:30 AM Executive Session (closed) Panel 30' 9:00 AM CMS status and US CMS Research Program [slides] Dan Green 15'+5' 9:20 AM Project overview [slides] Lothar Bauerdick 40'+10' 10:10 AM Coffee 20' 10:30 AM CAS report and CCS [slides] Bob Clare 40'+10 11:20 AM UF report [slides] Ian Fisk 40'+10' 12:10 PM Grid2003 report [slides] Ruth Pordes 20'+5' 12:35 PM Lunch 2:00 PM Executive Session (closed) Panel

277

Recent results of the CMS experiment  

E-Print Network [OSTI]

The CMS experiment is a multi-purpose detector successfully operated at the LHC where predominantly pp collisions take place at various centre-of-mass energies up to sqrt(s)=8 TeV so far. Several weeks per year also heavy-ion collisions take place leading to interesting studies in Pb-Pb and p-Pb collisions at sqrt(s_(NN))=2.76 TeV and sqrt(s_(NN))=5.02 TeV centre-of-mass energies per nucleon, respectively. The excellent performance of the accelerator and the experiment allows for dedicated physics measurements over a wide range of subjects, starting from particle identification, encompassing forward physics, Standard Model measurements in multijet, boson, heavy flavour and top quark physics, building the basis for new physics searches interpreted within the framework of various models and theories. These pursued pp physics subjects are complemented by a rich heavy ion physics programme.

Lars Sonnenschein

2014-08-18T23:59:59.000Z

278

Muon Capture in Gaseous Hydrogen  

Science Journals Connector (OSTI)

An experiment to measure the muon nuclear capture rate in ultrapure gaseous hydrogen (8 atm, 293°K) has been performed using a special target in which a system of gas proportional counters, working with the pure hydrogen of the target itself, were operating. Neutrons from the capture reactions were detected using a scintillation-counter technique, and the ?-ray background was eliminated by pulse-shape discrimination. The working conditions ensured that the captures were taking place in ?p atomic systems in a singlet total-spin state. The experimental result is ?expt=651±57 sec-1, which has to be compared with the theoretical rate ?s, theor=626±26 sec-1. From the experimental capture rate, and within the framework of the currently accepted theory, we have obtained for the induced pseudoscalar coupling constant gp=(-7.3±3.7)gV. The results of the present experiment are analyzed, together with results obtained from stopping negative muons in liquid hydrogen.

A. Alberigi Quaranta; A. Bertin; G. Matone; F. Palmonari; G. Torelli; P. Dalpiaz; A. Placci; E. Zavattini

1969-01-25T23:59:59.000Z

279

Muon Collaboration Status 124 Scientists & Engineers from 33 Institutions  

E-Print Network [OSTI]

Muon Collaboration Status 124 Scientists & Engineers from 33 Institutions Co-spokespeople: Steve Meeting, 18 Nov. 2002 #12;Muon Collaboration 124 Scientists & Engineers from 33 Institutions 6 US Labs ANL Univ. Pohang Univ. RAL Tel Aviv Univ. Muon Collaboration #12;Steve Geer HEPAP 18 November 2002 3 Muon

280

Muon Telescope By Nandita Sampath and Izzy Harrison  

E-Print Network [OSTI]

Muon Telescope By Nandita Sampath and Izzy Harrison #12;Abstract We wanted to determine whether the count rate of muons per hour would be affected if we changed the angle that our muon telescope pointed to the roof of the parking garage so the muons could not be affected by surrounding

California at Santa Cruz, University of

Note: This page contains sample records for the topic "muon solenoid cms" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

The Muon g-2 Experiment The NMR Probe Circuitry  

E-Print Network [OSTI]

The Muon g-2 Experiment The NMR Probe Circuitry Upgrading the Circuit Building the Circuit Future Work Updating NMR Probe Electronics in the Muon g-2 Experiment Audrey Kvam University of Washington September 1, 2014 Audrey Kvam Updating NMR Probe Electronics in the Muon g-2 Experiment #12;The Muon g-2

Washington at Seattle, University of - Department of Physics, Electroweak Interaction Research Group

282

Muon method for structural defects investigation in ferromagnetic metals  

Science Journals Connector (OSTI)

Equations describing depolarization of positive muons implanted in a pure crystalline ferromagnetic metal...

L. A. Kuzmin; V. P. Melnichuk; V. Yu. Miloserdin…

1986-12-01T23:59:59.000Z

283

The program in muon and neutrino physics: Superbeams, cold muon beams, neutrino factory and the muon collider  

SciTech Connect (OSTI)

The concept of a Muon Collider was first proposed by Budker [10] and by Skrinsky [11] in the 60s and early 70s. However, there was little substance to the concept until the idea of ionization cooling was developed by Skrinsky and Parkhomchuk [12]. The ionization cooling approach was expanded by Neufer [13] and then by Palmer [14], whose work led to the formation of the Neutrino Factory and Muon Collider Collaboration (MC) [3] in 1995. The concept of a neutrino source based on a pion storage ring was originally considered by Koshkarev [18]. However, the intensity of the muons created within the ring from pion decay was too low to provide a useful neutrino source. The Muon Collider concept provided a way to produce a very intense muon source. The physics potential of neutrino beams produced by muon storage rings was investigated by Geer in 1997 at a Fermilab workshop [19, 20] where it became evident that the neutrino beams produced by muon storage rings needed for the muon collider were exciting on their own merit. The neutrino factory concept quickly captured the imagination of the particle physics community, driven in large part by the exciting atmospheric neutrino deficit results from the SuperKamiokande experiment. As a result, the MC realized that a Neutrino Factory could be an important first step toward a Muon Collider and the physics that could be addressed by a Neutrino Factory was interesting in its own right. With this in mind, the MC has shifted its primary emphasis toward the issues relevant to a Neutrino Factory. There is also considerable international activity on Neutrino Factories, with international conferences held at Lyon in 1999, Monterey in 2000 [21], Tsukuba in 2001 [22], and another planned for London in 2002.

R. Raja et al.

2001-08-08T23:59:59.000Z

284

SNM detection by active muon interrogation  

SciTech Connect (OSTI)

Muons are charged particles with mass between the electron and proton and can be produced indirectly through pion decay by interaction of a charged-particle beam with a target. There are several distinct features of the muon interaction with matter attractive as a probe for detection of SNM at moderate ranges. These include muon penetration of virtually any amount of material without significant nuclear interaction until stopped by ionization loss in a short distance. When stopped, high-energy penetrating x-rays (in the range of 6 MeV for uranium,) unique to isotopic composition are emitted in the capture process. The subsequent interaction with the nucleus produces additional radiation useful in assessing SNM presence. A focused muon beam can be transported through the atmosphere, at a range limited mainly by beam-size growth through scattering. A muonbeam intensity of > 10{sup 9} /second is required for efficient interrogation and, as in any other technique, dose limits are to be respected. To produce sufficient muons a high-energy (threshold {approx}140 MeV) high-intensity (<1 mA) proton or electron beam is needed implying the use of a linear accelerator to bombard a refractory target. The muon yield is fractionally small, with large angle and energy dispersion, so that efficient collection is necessary in all dimensions of phase space. To accomplish this Los Alamos has proposed a magnetic collection system followed by a unique linear accelerator that provides the requisite phase-space bunching and allows an energy sweep to successively stop muons throughout a large structure such as a sea-going vessel. A possible maritime application would entail fitting the high-gradient accelerators on a large ship with a helicopter-borne detection system. We will describe our experimental results for muon effects and particle collection along with our current design and program for a muon detection system.

Jason, Andrew J [Los Alamos National Laboratory; Miyadera, Haruo [Los Alamos National Laboratory; Turchi, Peter J [Los Alamos National Laboratory

2010-01-01T23:59:59.000Z

285

Technical Challenges and Scientific Payoffs of Muon Beam Accelerators for Particle Physics  

E-Print Network [OSTI]

particles, all of the muon beam energy is available forfootprint. Indeed, an energy frontier Muon Collider couldaccelerating muons to even higher energies of several TeV,

Zisman, Michael S.

2008-01-01T23:59:59.000Z

286

CHARM PRODUCTION BY MUONS AND ITS ROLE IN SCALE-NONINVARIANCE  

E-Print Network [OSTI]

histograms (a) Daughter muon energy. increases not Errorsstrong influence on muon energies, distribution approximatestate (the sum of the muon energies and the shower energy)

Gollin, G.D.

2014-01-01T23:59:59.000Z

287

Progress on a Cavity with Beryllium Walls for Muon Ionization Cooling Channel R&D.  

E-Print Network [OSTI]

WITH BERYLLIUM WALLS FOR MUON IONIZATION COOLING CHANNELNY 11973, USA Abstract The Muon Accelerator Program (MAP)an ionization cooling channel for muon beams. An ionization

Bowring, D.L.

2014-01-01T23:59:59.000Z

288

Search for Supersymmetry Using Weak Boson Fusion Processes in Proton-Proton Collisions at the Large Hadron Collider  

E-Print Network [OSTI]

In 2012, the Large Hadron Collider at CERN (LHC) collided protons at an unprecedented center-of-mass energy of 8 TeV. With data corresponding to a total integrated luminosity of 19.7 fb^(?1), the Compact Muon Solenoid (CMS) collaboration is studying...

Flanagan, Will

2014-08-08T23:59:59.000Z

289

From Neutrino Factory to Muon Collider  

SciTech Connect (OSTI)

After summarizing the important commonalities between neutrino factories and muon colliders, the key differences are discussed. These include a much larger needed cooling factor ({approx}10{sup 6} in six-dimensional emittance), a smaller number of muon bunches (perhaps only one of each charge), and acceleration to much higher energy, implying significantly different technical choices for some of the cooling and acceleration subsystems. The final storage rings are also quite different. Nevertheless, a neutrino factory could serve as a key stepping stone on the path to a muon collider.

Kaplan, Daniel M. [Illinois Institute of Technology, Chicago, IL 60616 (United States)

2011-10-06T23:59:59.000Z

290

Jet energy scale uncertainty correlations between ATLAS and CMS  

E-Print Network [OSTI]

The correlation of the jet energy scale uncertainties between the ATLAS and CMS experiments are presented in this note. The uncertainty components for both experiments are grouped into categories. For each of these categories, the detailed

CMS Collaboration

2014-01-01T23:59:59.000Z

291

Jet energy scale uncertainty correlations between ATLAS and CMS  

E-Print Network [OSTI]

The correlation of the jet energy scale uncertainties between the ATLAS and CMS experiments are presented in this note. The uncertainty components for both experiments are grouped in categories. For each of these categories, the detailed comparison of the procedures to determine the jet calibration and its uncertainties allows to estimate a range for the correlation coefficient between the two experiments, ranging from 0 (uncorrelated) to 100\\% (fully correlated). This information can be used for the combination of ATLAS and CMS precision measurements.

The ATLAS collaboration

2014-01-01T23:59:59.000Z

292

Measurement of the Top Quark Mass With 2012 CMS Data  

E-Print Network [OSTI]

The mass of the top quark was an active topic of research at CMS using 2011 data, and remains so as the 2012 data analysis campaign proceeds. Here we discuss some of the earliest results on the top mass using 2012 sqrt(s) = 8 TeV CMS data, including measurements of the top mass from semileptonic t\\bar{t} decays and the lifetime of the B-hadron, as well as a measurement of the top-antitop mass difference.

Richard Nally

2014-09-01T23:59:59.000Z

293

Muon energy-loss distribution and its applications to muon energy determination  

Science Journals Connector (OSTI)

For measurements of the cosmic-ray muon spectrum at energies above 100 TeV and for observations of high-energy astronomical neutrinos a big detector is necessary. In both cases, information on the muon energy plays an important role. The method for estimating the muon energy from the energy loss should yield accurate values with a big detector. To evaluate the method we measured the muon energy-loss distribution in the MUTRON detector and applied the results to a big detector proposed for deployment in the ocean. When estimating the muon energy we divided the muon track into several segments and discarded the segment with the maximum energy loss. If a detector with a volume of (500m)3 is constructed in the ocean using strings of detectors with 50-m spacing between adjacent strings, and 10-m spacing between detectors on a string, muon energies could be measured with a relative error of about 30%. For muons produced by the charged-current interaction (??+N??+X), the neutrino direction can be determined with an error less than 1° for muon energies above 1 TeV.

K. Mitsui

1992-05-01T23:59:59.000Z

294

Calibration of Muon Reconstruction Algorithms Using an External Muon Tracking System at the Sudbury Neutrino Observatory  

E-Print Network [OSTI]

To help constrain the algorithms used in reconstructing high-energy muon events incident on the Sudbury Neutrino Observatory (SNO), a muon tracking system was installed. The system consisted of four planes of wire chambers, which were triggered by scintillator panels. The system was integrated with SNO's main data acquisition system and took data for a total of 95 live days. Using cosmic-ray events reconstructed in both the wire chambers and in SNO's water Cherenkov detector, the external muon tracking system was able to constrain the uncertainty on the muon direction to better than 0.6 degrees.

SNO Collaboration

2011-05-06T23:59:59.000Z

295

Radiative muon capture in hydrogen  

Science Journals Connector (OSTI)

We analyze the radiative capture of the negative muon in hydrogen using amplitudes derived within the chiral Lagrangian approach. Besides the leading and next to leading order terms, given by the well-known Rood-Tolhoek Hamiltonian, we extract from these amplitudes the corrections of the next order in 1/M (M is the nucleon mass). In addition, we estimate within the same formalism also the ?(1232) isobar excitation effects and processes described by an anomalous Lagrangian. The model we consider allows us to put the ? isobar off-shell. Our calculations show sensitivity of capture rates and photon spectra to Z, one of the off-shell parameters, related to the ?N? vertex. We have found that the model can provide the photon spectra, which are in the interval 60?MeV<~k<~kmax (k is the photon momentum) close to the experimental one.

E. Truhlík and F. C. Khanna

2002-04-01T23:59:59.000Z

296

Radiative muon capture in nuclei  

Science Journals Connector (OSTI)

The energy spectra of photons following negative muon absorption in C12, O16, Al27, Ca40, Fenat, Ho165, and Bi209 have been measured with two NaI spectrometers. The branching ratios for the emission of high energy photons give information on the induced pseudoscalar coupling constant gP in nuclear matter. The data for light nuclei are in agreement with the theoretical calculations using the nucleonic value of gP?7gA predicted by the partially conserved axial vector current hypothesis, while significantly lower values of gP are required to fit the data of the heavier elements with presently existing theoretical predictions. Disregarding the remaining theoretical uncertainties, these results can be interpreted as a further indication of the renormalization of the nucleonic form factors inside the nucleus.

M. Döbeli; M. Doser; L. van Elmbt; M. W. Schaad; P. Truöl; A. Bay; J. P. Perroud; J. Imazato; T. Ishikawa

1988-04-01T23:59:59.000Z

297

On LHCb muon MWPC grounding  

E-Print Network [OSTI]

My goal is to study how a big MWPC system, in particular the LHCb muon system, can be protected against unstable operation and multiple spurious hits, produced by incorrect or imperfect grounding in the severe EM environment of the LHCb experiment. A mechanism of penetration of parasitic current from the ground loop to the input of the front-end amplifier is discussed. A new model of the detector cell as the electrical bridge is considered. As shown, unbalance of the bridge makes detector to be sensitive to the noise in ground loop. Resonances in ground loop are specified. Tests of multiple-point and single-point grounding conceptions made on mock-up are presented.

Kashchuk, A

2006-01-01T23:59:59.000Z

298

Triggering and W-Polarisation Studies with CMS at the LHC  

E-Print Network [OSTI]

Results from studies on the commissioning of the Global Calorimeter Trigger (GCT) of the CMS experiment are presented. Event-by-event comparisons of the hardware with a bit-level software emulation are used to achieve 100% agreement for all trigger quantities. In addition, a missing energy trigger based on jets is motivated using a simulation study, and consequently implemented and commissioned in the GCT. Furthermore, a templated-fit method for measuring the polarisation of W bosons at the LHC in the Helicity Frame is developed, and validated in simulation. An analysis of the first 3.2/pb of sqrt(s) = 7 TeV LHC data in the muon channel yields values of (fL ? fR)+ = 0.347 ± 0.070, f0+ = 0.240 ± 0.176, and (fL ? fR)? = 0.097 ± 0.088, f0? = 0.262 ± 0.196 for positive and negative charges respectively. The errors quoted are statistical. A preliminary systematic study is also presented.

Marrouche, Jad

2010-01-01T23:59:59.000Z

299

Cosmic-ray muons at ultrahigh energies  

Science Journals Connector (OSTI)

Fluxes of cosmic-ray muons were estimated over the energy range extending up to 1010 GeV. Data on the production of pions; kaons; ?, ??, ?, ?, and ? mesons; charmed particles; and J/?...mesons from accelerator ex...

L. V. Volkova

2011-02-01T23:59:59.000Z

300

Simulation of low energy muon frictional cooling  

Science Journals Connector (OSTI)

Frictional cooling is a proposed method of phase space reduction for a potential muon beam intended for collisions. The basic principle involves compensating for the muon energy loss in media by a constant electric field. The muons are in an energy regime below the ionization peak which for muons in helium is less than 10 keV . Electronic energy loss is treated as a continuous process and all individual nuclear scatters with scattering angles greater than 50 mrad are simulated as discrete processes. Other effects like the Barkas [W.H. Barkas, W. Birnbaum, F.M. Smith, Phys. Rev. 101 (1956) 778.] effect and Muonium formation are also included. The results of our simulations are summarized.

R. Galea; A. Caldwell; S. Schlenstedt; H. Abramowicz

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "muon solenoid cms" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Direct pair production by high energy muons  

Science Journals Connector (OSTI)

A multiplate cloud chamber was operated 1032ft...undergound to study electromagnetic interactions of fast cosmic ray muons. 222 electron showers were observed. A histogram was obtained for transferred energies fr...

J. F. Gaebler; W. E. Hazen; A. Z. Hendel

1961-01-16T23:59:59.000Z

302

Early Work on the Positron and Muon  

Science Journals Connector (OSTI)

Early work on the positron and muon is described in an informal way with emphasis on those aspects of the work which normally would not find their way into the literature.

C. D. Anderson

1961-01-01T23:59:59.000Z

303

Muon capture rates within the projected QRPA  

E-Print Network [OSTI]

The conservation of the number of particles within the QRPA plays an important role in the evaluation muon capture rates in all light nuclei with A \\precsim 30 . The violation of the CVC by the Coulomb field in this mass region is of minor importance, but this effect could be quite relevant for medium and heavy nuclei studied previously. The extreme sensitivity of the muon capture rates on the 'pp' coupling strength in nuclei with large neutron excess when described within the QRPA is pointed out. We reckon that the comparison between theory and data for the inclusive muon capture is not a fully satisfactory test on the nuclear model that is used. The exclusive muon transitions are much more robust for such a purpose.

Danilo Sande Santos; Arturo R. Samana; Francisco Krmpoti?; Alejandro J. Dimarco

2012-03-03T23:59:59.000Z

304

Muon trapping at monovacancies in iron  

Science Journals Connector (OSTI)

Positive-muon—spin-rotation experiments were performed on electron irradiated iron. A new defect-associated frequency is observed which is assigned to muons trapped at monovacancies. The hyperfine field at the vacancy site is -0.956 T at 140 K. The diffusion constant for ?+ in iron deduced from the trapping rate follows an Arrhenius law with an activation energy of 38±3 meV between 90 and 190 K.

A. Möslang; H. Graf; G. Balzer; E. Recknagel; A. Weidinger; Th. Wichert; R. I. Grynszpan

1983-03-01T23:59:59.000Z

305

Evaluation and Compensation of Detector Solenoid Effects on Disrupted Beam in the ILC 14 mrad Extraction Line  

SciTech Connect (OSTI)

This paper presents calculations of detector solenoid effects on disrupted primary beam in the ILC 14 mrad extraction line. Particle tracking simulations are performed for evaluation of primary beam loss along the line as well as of beam distribution and polarization at Compton Interaction Point. The calculations are done both without and with solenoid compensation. The results are obtained for the baseline ILC energy of 500 GeV center-of-mass and three options of beam parameters.

Toprek, Dragan; /VINCA Inst. Nucl. Sci., Belgrade; Nosochkov, Yuri; /SLAC

2008-12-18T23:59:59.000Z

306

A design for a combined function superconducting dipole for a muon collider FFAG accelerator  

E-Print Network [OSTI]

A muon at rest (the muon rest mass energy Br = 106 Me V) hasacceleration of the muons from their energy in the coolingaccelerator. As the energy of the muon beam increases, the

Green, M.A.

2011-01-01T23:59:59.000Z

307

Muon-Proton Scattering and Possible Anomalous Interaction of the Muon  

Science Journals Connector (OSTI)

It is argued that a possible anomalous interaction of the muon of the form if?¯????? can be large enough to account for the ?-pe-p cross-section ratio and yet it is not inconsistent with the present comparison for the theoretical and experimental values of the anomalous magnetic moment of the muon.

D. Kiang and S. H. Ng

1970-11-01T23:59:59.000Z

308

s-Channel Higgs Boson Production at a Muon-Muon Collider  

Science Journals Connector (OSTI)

High luminosity muon-muon colliders would provide a powerful new probe of Higgs boson physics through s-channel resonance production. We discuss the prospects for detection of Higgs bosons and precision measurements of their masses and widths at such a machine.

V. Barger; M. S. Berger; J. F. Gunion; T. Han

1995-08-21T23:59:59.000Z

309

The muon charge ratio in cosmic ray air showers  

E-Print Network [OSTI]

The muon charge ratio of the lateral muon density distributions in single EAS is studied by simulations, in context of recent proposals to measure this observable in coincidence with EAS observations. While effects of the hadronic interaction do not lead to significant differences of the total muon plus and muon minus content, the differences of the azimuthal variation of the muon densities of opposite charges and the azimuthal variation of the muon charge ratio appear to be very much pronounced, dependent on the direction of EAS incidence. This is due to the influence of the geomagnetic field which induces related effects in radio emission from extended air showers.

H. Rebel; O. Sima; A. Haungs; C. Manailescu; B. Mitrica; C. Morariu

2008-06-29T23:59:59.000Z

310

Passive Imaging of Warhead-Like Configurations Using Cosmic-Ray Muons  

SciTech Connect (OSTI)

Cosmic-Muon-Based Interrogation has untapped potential for national security. This presentation describes muons-based passive interrogation techniques.

Schwellenbach, D.

2012-07-17T23:59:59.000Z

311

The Solenoidal Detector Collaboration at the SSCL. Progress report, March 1, 1991--February 29, 1992  

SciTech Connect (OSTI)

Our primary interest is the detection and measurement of muons and the design of the muon detector and trigger for the SDC. We have been concentrating on the design of the forward muon system (in the approximate pseudo-rapidity region of 1.5 <{vert_bar} {eta} {vert_bar}<2.5 corresponding to azimuthal angles of 9.4{degrees} to 26. 0{degrees}) and at present are responsible for the engineering design of the detector support system in this rapidity region. We are also participating in the development of a liquid argon (LAr) calorimeter adapted to the bunch structure of the SSC machine. At present a LAr calorimeter still remains an option for the choice of calorimetry for the SDC. Recent measurements at BNL in a 20 GeV pion beam confirm that many of the problems associated with long signal collection times of LAr can be solved.

Not Available

1992-05-01T23:59:59.000Z

312

Protection from muons in high energy proton accelerators  

Science Journals Connector (OSTI)

A generalization of the works on muon shielding in proton accelerators is carried out. Coulomb scattering of muons, energy losses in ionization and excitation of atoms, ... p-nuclear interaction. Results of compu...

V. I. Gurentsov; L. R. Kimel'; O. N. Salimov

1972-04-01T23:59:59.000Z

313

Energy measurement of muons above 1 TeV  

Science Journals Connector (OSTI)

Pair production and bremsstrahlung cross-sections have sufficient magnitude and energy-dependence for muons above 1 TeV to suggest the use of these cross-sections for measurement of muon energies. A series of Mon...

M. K. Moe

1970-03-11T23:59:59.000Z

314

Muon-induced backgrounds in the CUORICINO experiment  

E-Print Network [OSTI]

code simulated the muon energy and angular distribution inthe direction and energy of the muons underground. The rangemuon and bolometer counts / 1 keV Low LowEnergyRegion Energy

Andreotti, E.

2010-01-01T23:59:59.000Z

315

Low-energy muons in extensive air showers (EAS)  

Science Journals Connector (OSTI)

A small air shower array of 21 detectors in conjunction with two shielded muon magnetic spectrographs has been operated for detection of muons of momentum in the range (2÷500...o...45? N at North Bengal Universit...

D. K. Basak; N. Chaudhuri; S. Sarkar; B. Bhattacharya; B. Ghosh

316

Low energy muons as probes of thin films and surfaces  

Science Journals Connector (OSTI)

Polarized muons with kinetic energies of a few eV (epithermal ?+...) can be generated by slowing down energetic muons in appropriate moderators consisting of a thin ... on a substrate. The availability of polariz...

E. Morenzoni

1997-07-01T23:59:59.000Z

317

Temperature variations in the flux of high-energy muons  

Science Journals Connector (OSTI)

The flux of high-energy muons (threshold energy, 220 GeV) as a function of ... the correlation coefficient between the counting rate of muons and the temperature of the atmosphere at...

M. G. Kostyuk; V. B. Petkov…

2011-06-01T23:59:59.000Z

318

The Anomalous Magnetic Moment of the Muon: A Theoretical Introduction  

Science Journals Connector (OSTI)

In February 2001, the Muon (g-2) Collaboration of the E821 experiment at the Brookhaven AGS released a new value of the anomalous magnetic moment of the muon a ? , mea...

Marc Knecht

2004-01-01T23:59:59.000Z

319

Muon States in Polycrystalline and Amorphous Silicon [and Discussion  

Science Journals Connector (OSTI)

15 February 1995 research-article Muon States in Polycrystalline and Amorphous Silicon [and Discussion] E. A. Davis A. Singh S. F. J. Cox A. M. Stoneham M. Symons Muons implanted into polycrystalline and amorphous silicon have been...

1995-01-01T23:59:59.000Z

320

Muon Diagnostics: A New Technique of Heliosphere Investigations  

Science Journals Connector (OSTI)

A new technique of remote monitoring of dynamic processes in the heliosphere (muon diagnostics) has been presented. The approach ... analysis of spatial-angular and temporal variations of muon flux detected at th...

A. A. Petrukhin

2009-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "muon solenoid cms" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

-mixing, the e+ vs puzzle and the muon g -2  

E-Print Network [OSTI]

- mixing, the e+ e- vs puzzle and the muon g - 2 Fred Jegerlehner HU Berlin/DESY Zeuthen, fjeger. Consequences for the muon g - 2 are discussed. Work in collaboration with Robert Szafron [e-Print: arXiv:1101

Röder, Beate

322

Strongest Pulsed Muon Source at J-PARC MUSE  

SciTech Connect (OSTI)

The muon science facility (MUSE, abbreviation of MUon Science Establishment), along with the neutron, hadron, and neutrino facilities, is located in the Materials and Life Science Facility (MLF), which is a building integrated to include both neutron and muon science programs. On the November, 2009 beam cycle, we achieved extraction of the world's strongest pulsed muon beam at J-PARC MUSE by beam tuning at the Decay-Surface muon beam line (D-line). Surface muons ({mu}{sup +}) as much as 1.8x10{sup 6}/s were extracted with the use of 120 kW of protons from the Rapid Cycle Synchrotron (RCS), which corresponds to 1.5x10{sup 7}/s surface muons when a future proton beam reached at the intensity of 1MW. These intensities, at the future 1 MW operation, will correspond to more than ten times those at the RIKEN-RAL Muon facility.

Miyake, Y.; Shimomura, K.; Kawamura, N.; Strasser, P.; Koda, A.; Fujimori, H.; Makimura, S.; Nakahara, K.; Kato, M.; Takeshita, S.; Nishiyama, K.; Kobayashi, Y.; Kojima, K.; Kadono, R. [Meson Science Laboratory, High Energy Accelerator Research Organization, Ibaraki 305-0801 (Japan); Muon Section, Materials and Life Science Division, J-PARC Center, Ibaraki 319-1195 (Japan); Higemoto, W.; Ito, T.; Ninomiya, K. [Muon Section, Materials and Life Science Division, J-PARC Center, Ibaraki 319-1195 (Japan); Japan Atomic Energy Research Center (JAEA), Ibaraki 319-1195 (Japan); Hiraishi, M.; Miyazaki, M. [Department of Materials Structure Science, Graduate University for Advanced Studies (Japan); Kubo, K. [Graduate School Division of Natural Sciences, International Christian University, Mitaka, Tokyo (Japan)

2011-10-06T23:59:59.000Z

323

U.S. CMS - U.S. CMS @ Work - Doing Physics - User Software & Computing -  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Downtimes Downtimes USCMS Tier-1 Facilities Downtimes Information on upcoming USCMS Tier-1 Facilities downtimes will be posted on this downtime webpage and on the mailing list uscmst1-downtime@fnal.gov. During data taking, we are trying to limit our downtimes to as infrequently as possible. When necessary, the downtime will generally be on a Thursday. Mon Nov 8, 2010 6 AM to midnight - Chicago time U.S. CMS at FNAL Site outage Almost all of the USCMS facility at FNAL will be affected by work we will be performing on Monday morning. Most services will be intermittent throughout the morning. This includes: Catalin/Andrey - Convert 5 cmslpc SL4 nodes into SL5 cmslpc-sl5 nodes. Configure remaining 2 SL4 nodes as direct access nodes. Lisa - Configure BlueArc scratch disk as a 6-month max lifetime

324

U.S. CMS - U.S. CMS @ Work - Doing Physics - User Software & Computing -  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Resources Resources Personal Web Pages You can set up personal web pages in two locations on the cmslpc cluster. Publicly visible web pages: You need to create a public_html subdir in your afs area /afs/fnal.gov/files/home/room/{1,2or3}/username/public_html This will then be visible to http://home.fnal.gov/~username You can use up to your afs quota, usually 500MB. Private web pages: We added the ability to make directories in /uscms/home and /uscms_data accessible through a web link ➨ You need either * /uscms_data/d1/your_name/public_html * /uscms/home/your_name/public_html ➨ These will then be visible to * https://cmslpcweb.fnal.gov/uscms_data/your_name/ * https://cmslpcweb.fnal.gov/uscms/your_name/ * (Trailing slash is important) ➨ You need a CMS registered grid certificate loaded into

325

U.S. CMS - U.S. CMS @ Work - Working at CERN - Computers  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Computers Computers User accounts on CERN central computer services CERN has various "central services" (LXPLUS - Linux, NICE - MS Windows, etc...) which provide centralized file backup and a set of standard applications. All Unix services use AFS (Andrew File System) which allows users to access all Unix hardware platforms with the same username and password - accounts must be specifically added for each platform on which you wish to work. You must first register with the CERN User's Office before an account on the CERN central Services can be created for you. Once you are a registered CERN User, you'll need to fill out a CERN Computer Center Registration Form (available in the US CMS Project Office) which should be signed by your computer group administrator. The computer group

326

U.S. CMS - U.S. CMS @ Work - Software and Computing Subproject - Access to  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

In This Section: In This Section: Data Operations Facility Operations Tier-1 Access to Mass Storage EOS EOS is a disk based mass storage system being evaulated on the LPC cluster. It is mounted on the LPC interactive nodes and the LPC batch nodes at the path /eos/uscms/store/user/ Users may request a directory there by sending email to cms-t1@fnal.gov. Unix file commands (cp and mv) work to move files into and out of EOS (which is different from dcache). Running cp between two paths in EOS however does not work. You should also be able to read and write files from programs like Root and CMSSW as well. SRM access - there is also an SRM endpoint available at srm://cmseos.fnal.gov:8443/srm/v2/server?SFN=/eos/uscms and the command to use is: srmcp -2 -debug file:////uscms/home/catalind/eos-a

327

U.S. CMS - U.S. CMS @ Work - Data and Computing - Facility Operations -  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Data and Computing Facility Operations Data and Computing Facility Operations In This Section: Getting Started Computing Environment Resources Setup Software Tutorials, Documentation, How Tos Mass Storage File Transfer Batch Systems CRAB Quota and Usage Statistics CERN Bluearc Quota and Stats System Status U.S. CMS Grid Data Transfer to and from UAF At Fermilab, access to User Analysis Farm (UAF) goes through cmsuaf.fnal.gov. This can be accessed using Secure Copy (scp) or sftp. The following storage areas on NFS are available for users: /uscms/home/username /uscms_data/d1/username To transfer a file to UAF: Usage: scp file_name username@cmsuaf.fnal.gov:/uscms/home/username e.g. $ scp zprime705.jdf wenzel@cmsuaf.fnal.gov:/uscms/home/wenzel zprime705.jdf 100% |*****************************| 286 00:00

328

U.S. CMS - U.S. CMS @ Work - Data and Computing - Facility Operations - How  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Data and Computing Facility Operations Data and Computing Facility Operations In This Section: Getting Started Computing Environment Resources Setup Software Tutorials, Documentation, How Tos Mass Storage File Transfer Batch Systems CRAB Quota and Usage Statistics CERN Bluearc Quota and Stats System Status U.S. CMS Grid How to use SRM on the UAF Introduction Prerequisites Prepare your UAF account to use srmcp Transfering a file Monitoring SRM Gettin Help Introduction SRM (Storage Resource Management) is a grid-service available on the UAF. The srmcp command allows for file transfers between sites and mass storage systems. Here we will show examples to transfer files from CASTOR at CERN to Fermilab. Since it is a grid service there are two prerequisites: Prerequisites The whole procedure will probaly take a few days but you might want to

329

Muon-Catalyzed Nuclear Fusion for Energy Production  

Science Journals Connector (OSTI)

The physics of muon-catalyzed fusion is summarized and discussed in the perspective of energy production.

S. Eliezer

1987-01-01T23:59:59.000Z

330

Studies of muon-induced radioactivity at NuMI  

SciTech Connect (OSTI)

The JASMIN Collaboration has studied the production of radionuclides by muons in the muon alcoves of the NuMI beamline at Fermilab. Samples of aluminum and copper are exposed to the muon field and counted on HpGe detectors when removed to determine their content of radioactive isotopes. We compare the results to MARS simulations and discuss the radiological implications for neutrino factories and muon colliders.

Boehnlein, David j.; Leveling, A.F.; Mokhov, N.V.; Vaziri, K.; /Fermilab; Iwamoto, Y.; Kasugai, Y.; Matsuda, N.; Nakashima, H.; Sakamoto, Y.; /JAEA, Ibaraki; Hagiwara, M.; Iwase, Hiroshi; /KEK, Tsukuba /Kyoto U., KURRI /Pohang Accelerator Lab. /Shimizu, Tokyo /Tohoku U.

2009-12-01T23:59:59.000Z

331

Muon Figures: 2001/04/19 Chris Waltham  

E-Print Network [OSTI]

Muon Figures: 2001/04/19 Chris Waltham Hanging Wall 65 Looking o o ~25 S of W Fault Line r=2730 r) and replaced with back#12;ll. The grid is 1000' (#25;300m) square. p Muon Track Light from Muon Xf PSUP Impact Parameter at time Tf Muon leaves PSUP V h Cherenkov Cone Figure 3: Fitting Diagram 2 #12; ) (degrees) fit v

Learned, John

332

Changes Made on a 2.7-m Long Superconducting Solenoid Magnet Cryogenic System that allowed the Magnet to be kept Cold using 4 K Pulse Tube Cooler  

E-Print Network [OSTI]

in Cooler,” Advances in Cryogenic Engineering 57, pp 581 -Solenoid Magnet Cryogenic System that allowed the Magnet toof the International Cryogenic Engineering Conference 22,

Green, Michael

2014-01-01T23:59:59.000Z

333

Muon spin relaxation in CeCu2Si2 and muon knight shift in various heavy-fermion systems  

Science Journals Connector (OSTI)

Positive muon spin precession has been observed in various...2.1Si2, the relaxation rate of muon spins increases rapidly with decreasing temperature below...C.... This is interpreted as the results of the inhomog...

Y. J. Uemura; W. J. Kossler; B. Hitti; J. R. Kempton…

1986-12-01T23:59:59.000Z

334

Performance of ?q-lepton reconstruction and identification in CMS  

SciTech Connect (OSTI)

The performance of tau-lepton reconstruction and identification algorithms is studied using a data sample of proton-proton collisions at sqrt(s)=7 TeV, corresponding to an integrated luminosity of 36 inverse picobarns collected with the CMS detector at the LHC. The tau leptons that decay into one or three charged hadrons, zero or more short-lived neutral hadrons, and a neutrino are identified using final-state particles reconstructed in the CMS tracker and electromagnetic calorimeter. The reconstruction efficiency of the algorithms is measured using tau leptons produced in Z-boson decays. The tau-lepton misidentification rates for jets and electrons are determined.

Chatrchyan, Serguei; et al.

2012-01-01T23:59:59.000Z

335

The Production of Prompt Cosmic Ray Muons and Neutrinos  

Science Journals Connector (OSTI)

......observed. Direct measurements of the muon energy spectrum at sea-level have been...from D-meson, we get the prompt muon energy spectrum. And the spectrum is...Figure 5 compares the integral muon energy spectra at sea level of conven......

Hiroshi Inazawa; Keizo Kobayakawa

1983-04-01T23:59:59.000Z

336

Muon Pair Creation by a High Energy Electron  

Science Journals Connector (OSTI)

......research-article Articles Muon Pair Creation by a High Energy Electron Takao Yamamoto...cross section for the muon pair creation by an electron...calculated at the incident energy about 1 Bev. At the angles of emitted muons theta+ = theta- 45......

Takao Yamamoto

1962-02-01T23:59:59.000Z

337

Energy spectrum of cosmic-ray muons at sea level  

Science Journals Connector (OSTI)

The integral energy spectrum of cosmic-ray muons at sea level in the energy range (200÷7500) GeV is deduced ... this, the effect of fluctuations in the energy losses of muons is taken into account. The deduced muon

S. Miyake; V. S. Narasimham; P. V. Ramana Murthy

1964-01-16T23:59:59.000Z

338

COMPUTATIONAL MODELING OF MUONS PASSING THROUGH GAS PRESSURED RF CAVITIES  

E-Print Network [OSTI]

of muons passing through matter. PHYSICAL MODEL We start our study with a classical scattering of muonsCOMPUTATIONAL MODELING OF MUONS PASSING THROUGH GAS PRESSURED RF CAVITIES A. Samolov, A. Godunov, and to validate a technical design of these new accelerating facilities, accu- rate and comprehensive simulations

Godunov, Alexander L.

339

Muon Endcap Trigger Electronics Document presented for FDR  

E-Print Network [OSTI]

Muon Endcap Trigger Electronics Document presented for FDR held on March,1,2004 CF Slice Tests of Level 1 Muon End-cap Trigger System ATLAS TGC electronics group 4th February 2004 I. Introduction We for the muon beam test held in 2003 at SPS H8 beam line. We have roughly four major development phases during

Fukunaga, Chikara

340

PROTON BEAM REQUIREMENTS FOR A NEUTRINO FACTORY AND MUON COLLIDER  

SciTech Connect (OSTI)

Both a Neutrino Factory and a Muon Collider place stringent demands on the proton beam used to generate the desired beam of muons. Here we discuss the advantages and challenges of muon accelerators and the rationale behind the requirements on proton beam energy, intensity, bunch length, and repetition rate. Example proton driver configurations that have been considered in recent years are also briefly indicated.

Zisman, Michael S.

2009-12-11T23:59:59.000Z

Note: This page contains sample records for the topic "muon solenoid cms" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

A Muon and Neutron Study of Multiferroic Materials  

E-Print Network [OSTI]

A Muon and Neutron Study of Multiferroic Materials Heather Joanne Lewtas University of Oxford #12;A Muon and Neutron Study of Multiferroic Materials Heather Joanne Lewtas Linacre College performed to try and identify muon stopping sites. The family of rare earth chromites have been studied

Boothroyd, Andrew

342

Muon-spin-rotation studies of organic magnets  

Science Journals Connector (OSTI)

...organized by P. Day and A. E. Underhill Muon-spin-rotation studies of organic magnets...Laboratory, Parks Road, Oxford OX1 3PU, UK A muon is an unstable spin- particle with a lifetime...s. Beams of spin-polarized positive muons can be prepared at accelerator facilities...

1999-01-01T23:59:59.000Z

343

Atlas Muon MDT Readout 06 December 2000 Thei Wijnen 1  

E-Print Network [OSTI]

Atlas Muon MDT Readout 06 December 2000 Thei Wijnen 1 "Slow controls" of MROD · System overview/Strobe Separator S 1 18 CSM 18 x TDC #18 #12;Atlas Muon MDT Readout 06 December 2000 Thei Wijnen 2 06 December 2000-bus" Network #12;Atlas Muon MDT Readout 06 December 2000 Thei Wijnen 3 06 December 2000 T. Wijnen 5 Memory

van Suijlekom, Walter

344

Summary of Muon Working Group B. Lee Roberts  

E-Print Network [OSTI]

BOSTON UNIVERSITY Summary of Muon Working Group Report on ¡ ¢ £ , EDM and ¤¦¥ B. Lee Roberts UNIVERSITY The Program of Muon Physics: § ¨© experiment to 0.05 ppm. § Muon EDM to cm. § Limit, Kyoto, September 2002 ­ p.3/25 #12;BOSTON UNIVERSITY Machine Requirements These experiments (except

Roberts, B. Lee

345

Muon Fluence Measurements for Homeland Security Applications  

SciTech Connect (OSTI)

This report focuses on work conducted at Pacific Northwest National Laboratory to better characterize aspects of backgrounds in RPMs deployed for homeland security purposes. Two polyvinyl toluene scintillators were utilized with supporting NIM electronics to measure the muon coincidence rate. Muon spallation is one mechanism by which background neutrons are produced. The measurements performed concentrated on a broad investigation of the dependence of the muon flux on a) variations in solid angle subtended by the detector; b) the detector inclination with the horizontal; c) depth underground; and d) diurnal effects. These tests were conducted inside at Building 318/133, outdoors at Building 331G, and underground at Building 3425 at Pacific Northwest National Laboratory.

Ankney, Austin S.; Berguson, Timothy J.; Borgardt, James D.; Kouzes, Richard T.

2010-08-10T23:59:59.000Z

346

Muon (g-2) Technical Design Report  

E-Print Network [OSTI]

The Muon (g-2) Experiment, E989 at Fermilab, will measure the muon anomalous magnetic moment a factor-of-four more precisely than was done in E821 at the Brookhaven National Laboratory AGS. The E821 result appears to be greater than the Standard-Model prediction by more than three standard deviations. When combined with expected improvement in the Standard-Model hadronic contributions, E989 should be able to determine definitively whether or not the E821 result is evidence for physics beyond the Standard Model. After a review of the physics motivation and the basic technique, which will use the muon storage ring built at BNL and now relocated to Fermilab, the design of the new experiment is presented. This document was created in partial fulfillment of the requirements necessary to obtain DOE CD-2/3 approval.

J. Grange; V. Guarino; P. Winter; K. Wood; H. Zhao; R. M. Carey; D. Gastler; E. Hazen; N. Kinnaird; J. P. Miller; J. Mott; B. L. Roberts; J. Benante; J. Crnkovic; W. M. Morse; H. Sayed; V. Tishchenko; V. P. Druzhinin; B. I. Khazin; I. A. Koop; I. Logashenko; Y. M. Shatunov; E. Solodov; M. Korostelev; D. Newton; A. Wolski; R. Bjorkquist; N. Eggert; A. Frankenthal; L. Gibbons; S. Kim; A. Mikhailichenko; Y. Orlov; D. Rubin; D. Sweigart; D. Allspach; G. Annala; E. Barzi; K. Bourland; G. Brown; B. C. K. Casey; S. Chappa; M. E. Convery; B. Drendel; H. Friedsam; T. Gadfort; K. Hardin; S. Hawke; S. Hayes; W. Jaskierny; C. Johnstone; J. Johnstone; V. Kashikhin; C. Kendziora; B. Kiburg; A. Klebaner; I. Kourbanis; J. Kyle; N. Larson; A. Leveling; A. L. Lyon; D. Markley; D. McArthur; K. W. Merritt; N. Mokhov; J. P. Morgan; H. Nguyen; J-F. Ostiguy; A. Para; C. C. Polly M. Popovic; E. Ramberg; M. Rominsky; D. Schoo; R. Schultz; D. Still; A. K. Soha; S. Strigonov; G. Tassotto; D. Turrioni; E. Villegas; E. Voirin; G. Velev; D. Wolff; C. Worel; J-Y. Wu; R. Zifko; K. Jungmann; C. J. G. Onderwater; P. T. Debevec; S. Ganguly; M. Kasten; S. Leo; K. Pitts; C. Schlesier; M. Gaisser; S. Haciomeroglu; Y-I. Kim; S. Lee; M-J Lee; Y. K. Semertzidis; K. Giovanetti; V. A. Baranov; V. N. Duginov; N. V. Khomutov; V. A. Krylov; N. A. Kuchinskiy; V. P. Volnykh; C. Crawford; R. Fatemi; W. P. Gohn; T. P. Gorringe; W. Korsch; B. Plaster; A. Anastasi; D. Babusci; S. Dabagov; C. Ferrari; A. Fioretti; C. Gabbanini; D. Hampai; A. Palladino; G. Venanzoni; T. Bowcock; J. Carroll; B. King; S. Maxfield; K. McCormick; A. Smith; T. Teubner; M. Whitley; M. Wormald; R. Chislett; S. Kilani; M. Lancaster; E. Motuk; T. Stuttard; M. Warren; D. Flay; D. Kawall; Z. Meadows; T. Chupp; R. Raymond; A. Tewlsey-Booth; M. J. Syphers; D. Tarazona; C. Ankenbrandt; M. A. Cummings; R. P. Johnson; C. Yoshikawa; S. Catalonotti; R. Di Stefano; M. Iacovacci; S. Mastroianni; S. Chattopadhyay; M. Eads; M. Fortner; D. Hedin; N. Pohlman; A. de Gouvea; H. Schellman; L. Welty-Rieger; T. Itahashi; Y. Kuno; K. Yai; F. Azfar; S. Henry; G. D. Alkhazov; V. L. Golovtsov; P. V. Neustroev; L. N. Uvarov; A. A. Vasilyev; A. A. Vorobyov; M. B. Zhalov; L. Cerrito; F. Gray; G. Di Sciascio; D. Moricciani; C. Fu; X. Ji; L. Li; H. Yang; D. Stöckinger; G. Cantatore; D. Cauz; M. Karuza; G. Pauletta; L. Santi; S. Bae\\ssler; M. Bychkov; E. Frlez; D. Pocanic; L. P. Alonzi; M. Fertl; A. Fienberg; N. Froemming; A. Garcia; D. W. Hertzog J. Kaspar; P. Kammel; R. Osofsky; M. Smith; E. Swanson; T. van Wechel; K. Lynch

2015-01-27T23:59:59.000Z

347

Muon (g-2) Technical Design Report  

E-Print Network [OSTI]

The Muon (g-2) Experiment, E989 at Fermilab, will measure the muon anomalous magnetic moment a factor-of-four more precisely than was done in E821 at the Brookhaven National Laboratory AGS. The E821 result appears to be greater than the Standard-Model prediction by more than three standard deviations. When combined with expected improvement in the Standard-Model hadronic contributions, E989 should be able to determine definitively whether or not the E821 result is evidence for physics beyond the Standard Model. After a review of the physics motivation and the basic technique, which will use the muon storage ring built at BNL and now relocated to Fermilab, the design of the new experiment is presented. This document was created in partial fulfillment of the requirements necessary to obtain DOE CD-2/3 approval.

Grange, J; Winter, P; Wood, K; Zhao, H; Carey, R M; Gastler, D; Hazen, E; Kinnaird, N; Miller, J P; Mott, J; Roberts, B L; Benante, J; Crnkovic, J; Morse, W M; Sayed, H; Tishchenko, V; Druzhinin, V P; Khazin, B I; Koop, I A; Logashenko, I; Shatunov, Y M; Solodov, E; Korostelev, M; Newton, D; Wolski, A; Bjorkquist, R; Eggert, N; Frankenthal, A; Gibbons, L; Kim, S; Mikhailichenko, A; Orlov, Y; Rubin, D; Sweigart, D; Allspach, D; Annala, G; Barzi, E; Bourland, K; Brown, G; Casey, B C K; Chappa, S; Convery, M E; Drendel, B; Friedsam, H; Gadfort, T; Hardin, K; Hawke, S; Hayes, S; Jaskierny, W; Johnstone, C; Johnstone, J; Kashikhin, V; Kendziora, C; Kiburg, B; Klebaner, A; Kourbanis, I; Kyle, J; Larson, N; Leveling, A; Lyon, A L; Markley, D; McArthur, D; Merritt, K W; Mokhov, N; Morgan, J P; Nguyen, H; Ostiguy, J-F; Para, A; Popovic, C C Polly M; Ramberg, E; Rominsky, M; Schoo, D; Schultz, R; Still, D; Soha, A K; Strigonov, S; Tassotto, G; Turrioni, D; Villegas, E; Voirin, E; Velev, G; Wolff, D; Worel, C; Wu, J-Y; Zifko, R

2015-01-01T23:59:59.000Z

348

Muon Tracking to Detect Special Nuclear Materials  

SciTech Connect (OSTI)

Previous experiments have proven that nuclear assemblies can be imaged and identified inside of shipping containers using vertical trajectory cosmic-ray muons with two-sided imaging. These experiments have further demonstrated that nuclear assemblies can be identified by detecting fission products in coincidence with tracked muons. By developing these technologies, advanced sensors can be designed for a variety of warhead monitoring and detection applications. The focus of this project is to develop tomographic-mode imaging using near-horizontal trajectory muons in conjunction with secondary particle detectors. This will allow imaging in-situ without the need to relocate the objects and will enable differentiation of special nuclear material (SNM) from other high-Z materials.

Schwellenbach, D. [NSTec; Dreesen, W. [NSTec; Green, J. A. [NSTec; Tibbitts, A. [NSTec; Schotik, G. [NSTec; Borozdin, K. [LANL; Bacon, J. [LANL; Midera, H. [LANL; Milner, C. [LANL; Morris, C. [LANL; Perry, J. [LANL; Barrett, S. [UW; Perry, K. [UW; Scott, A. [UW; Wright, C. [UW; Aberle, D. [NSTec

2013-03-18T23:59:59.000Z

349

Muon Capture on the Proton and Deuteron  

E-Print Network [OSTI]

By measuring the lifetime of the negative muon in pure protium (hydrogen-1), the MuCap experiment determines the rate of muon capture on the proton, from which the proton's pseudoscalar coupling g_p may be inferred. A precision of 15% for g_p has been published; this is a step along the way to a goal of 7%. This coupling can be calculated precisely from heavy baryon chiral perturbation theory and therefore permits a test of QCD's chiral symmetry. Meanwhile, the MuSun experiment is in its final design stage; it will measure the rate of muon capture on the deuteron using a similar technique. This process can be related through pionless effective field theory and chiral perturbation theory to other two-nucleon reactions of astrophysical interest, including proton-proton fusion and deuteron breakup.

Frederick Gray

2008-08-11T23:59:59.000Z

350

Fermilab | Muon Collider | Reports and Papers  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Reports and Papers Reports and Papers Comprehensive Reports J. Gallardo, R. Palmer, A. Tollestrup, A. Sessler, A. Skrinsky et al., "μ+ μ- Collider: A Feasibility Study," DPF/DPB Summer Study on New Directions for High Energy Physics, Snow- mass, Colorado, 25 Jun - 12 Jul 1996, BNL - 52503, Fermilab - Conf - 96 - 092, LBNL - 38946, http://www.cap.bnl.gov/mumu/pubs/snowmass96.html C. Ankenbrandt et al.,"Status of muon collider research and development and future plans," Phys. Rev. ST Accel. Beams 2 (1999) 081001, http://prst-ab.aps.org/abstract/PRSTAB/v2/i8/e081001 M. M. Alsharo'a et al., "Recent progress in neutrino factory and muon collider research within the Muon Collaboration," Phys. Rev. ST Accel. Beams 6 (2003) 081001, http://prst-ab.aps.org/abstract/PRSTAB/v6/i8/e081001

351

Characterisation of the muon beams for the Muon Ionisation Cooling Experiment  

SciTech Connect (OSTI)

A novel single-particle technique to measure emittance has been developed and used to characterise seventeen different muon beams for the Muon Ionisation Cooling Experiment (MICE). The muon beams, whose mean momenta vary from 171 to 281 MeV/c, have emittances of approximately 1.5--2.3 \\pi mm-rad horizontally and 0.6--1.0 \\pi mm-rad vertically, a horizontal dispersion of 90--190 mm and momentum spreads of about 25 MeV/c. There is reasonable agreement between the measured parameters of the beams and the results of simulations. The beams are found to meet the requirements of MICE.

Adams, D.; et al.,

2013-10-01T23:59:59.000Z

352

Shaping of fuel delivery characteristics for solenoid operated diesel engine gaseous injectors  

SciTech Connect (OSTI)

Solenoid operated gaseous injectors, when compared to conventional liquid fuel diesel injectors, differ in the way the fuel dose and its discharge rate are controlled. While in conventional diesel systems, the fuel dose and its injection rate depends on the fuel injection pump effective stroke and on the plunger diameter and velocity, the solenoid injectors operate in an on-off manner which limits the ability to control the gas discharge rate, resulting in its profile to be basically rectangular in shape. To reduce the gas injection rate at the beginning of the injection process in order to suppress the diesel-knock phenomenon, similar procedures as used in diesel engines could be implemented. One such approach is to use a throttling type pintle nozzle, and another method is to use a double-spring injector with a hole nozzle. The rationale for using such nozzle configurations is that gaseous fuels do not require atomization, and therefore, can be injected at lower discharge velocities than with liquid fuels. The gas delivery characteristics from a solenoid injector has been computer-simulated in order to assess the impact of the investigated three modes of fuel discharge rate control strategies. The simulation results confirmed that the gas dose and its discharge rate can be shaped as required. An experimental set-up is described to measure the gas discharge rate using a special gas injection mass flow rate indicator with a strain-gage sensor installed at the entry to a long tube, similar to that proposed by Bosch for liquid fuel volumetric flow rate measurements.

Hong, H.; Krepec, T.; Kekedjian, H.

1996-09-01T23:59:59.000Z

353

Joint ATLAS/CMS SLHC Opto WG 1 K.K. Gan Lesson Learned from  

E-Print Network [OSTI]

Joint ATLAS/CMS SLHC Opto WG 1 K.K. Gan Lesson Learned from ATLAS Pixel Optical Link #12;Joint ATLAS/CMS SLHC Opto WG 2 Outline Introduction VCSEL/PIN monitoring Analysis of opto-board/VCSEL/PIN failures Summary K.K. Gan #12;K.K. Gan Joint ATLAS/CMS SLHC Opto WG 3 Introduction Architecture

Gan, K. K.

354

Joint ATLAS/CMS SLHC Opto WG 1 March 5, 2010  

E-Print Network [OSTI]

Joint ATLAS/CMS SLHC Opto WG 1 March 5, 2010 K.K. Gan Status of the Development of On ATLAS/CMS SLHC Opto WG 2 Outline Introduction Current work with IBL Schedule K.K. Gan #12;K.K. Gan Joint ATLAS/CMS SLHC Opto WG 3 Introduction A proposal to develop on-detector array-based opto

Gan, K. K.

355

Complete Muon Cooling Channel Design and Simulations  

SciTech Connect (OSTI)

Considerable progress has been made in developing promising subsystems for muon beam cooling channels to provide the extraordinary reduction of emittances required for an energy-frontier muon collider. However, it has not yet been demonstrated that the various proposed cooling subsystems can be consolidated into an integrated end-to-end design. Presented here are concepts to address the matching of transverse emittances between subsystems through an extension of the theoretical framework of the Helical Cooling Channel (HCC), which allows a general analytical approach to guide the transition from one set of cooling channel parameters to another.

C. Y. Yoshikawa, C.M. Ankenbrandt, R.P. Johnson, Y.S. Derbenev, V.S. Morozov, D.V. Neuffer, K. Yonehara

2012-07-01T23:59:59.000Z

356

Complete Muon Cooling Channel Design and Simulations  

SciTech Connect (OSTI)

Considerable progress has been made in developing promising subsystems for muon beam cooling channels to provide the extraordinary reduction of emittances required for an energy-frontier muon collider. However, it has not yet been demonstrated that the various proposed cooling subsystems can be consolidated into an integrated end-to-end design. Presented here are concepts to address the matching of transverse emittances between subsystems through an extension of the theoretical framework of the Helical Cooling Channel (HCC), which allows a general analytical approach to guide the transition from one set of cooling channel parameters to another.

Neuffer, D.V.; /Fermilab; Ankenbrandt, C.M.; Johnson, R.P.; Yoshikawa, C.Y.; /MUONS Inc., Batavia; Derbenev, Y.S.; Morozov, V.S.; /Jefferson Lab

2012-05-01T23:59:59.000Z

357

Muon-induced luminescence in KBr  

Science Journals Connector (OSTI)

The energy spectrum of the luminescence induced by positive muons stopped in KBr has been obtained. This spectrum shows a Gaussian line shape with the peak located at 2.82(2) eV [FWHM, 0.56(5) eV], which is shifted considerably from the 2.28-eV luminescence line due to the lowest triplet state of self-trapped excitons (STE’s). This result, together with the temperature dependences of its lifetime and yield, strongly suggests that the initial state of the observed luminescence is a triplet STE state that is specific to the muon(ium)-KBr system.

R. Kadono; A. Matsushita; K. Nishiyama; K. Nagamine

1992-10-01T23:59:59.000Z

358

The Muon Detection System and W Z --> 3l?(e?, [mu]) cross section measurement at CMS  

E-Print Network [OSTI]

The startup of the Large Hadron Collider will allow scientists to probe energy scales that existed picoseconds after the Big Bang. Monte Carlo samples of many Standard Model processes are produced to simulate the conditions ...

Melachrinos, Constantinos

2008-01-01T23:59:59.000Z

359

Muon multiplicity at high energy proton-nuclei collisions  

E-Print Network [OSTI]

Estimation of multiplicity of muons and pions production at high energy proton-nuclei collisions is given. Both QED and QCD contributions are considered for peripheral kinematics of muon pair and $\\sigma$-meson production, keeping in mind it's final conversion to muons. An attempt to explain the excess of positive charged muons compared to negative one in cosmic muon showers is given. We derive the dependence of cross-section of $n$ pairs as a function of $n$ at large n as $d^n(n!n^2)^{-1}$.

E. A. Kuraev; S. Bakmaev; V. Bytev; E. Kokoulina

2007-06-29T23:59:59.000Z

360

First Observation of Accelerator Muon Antineutrinos in MINOS  

SciTech Connect (OSTI)

We report the first direct observation of muon antineutrinos in the MINOS Far Detector in the current muon-neutrino dominated beam. The magnetic field of the detector is utilized to separate muon neutrinos and antineutrinos event-by-event by identifying the charge sign of the muon created in charged-current interactions. We present preliminary results on the {bar {nu}}{sub {mu}} oscillation parameters as well as limit on the fraction of neutrinos that disappear and reappear as antineutrinos. We also discuss the prospect of the measurement when the polarity of the magnetic focusing horns will be reversed to create a dedicated muon antineutrino beam.

Danko, Istvan

2009-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "muon solenoid cms" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Free Muons and Muonium - Some Achievements and Possibilities in Low Energy Muon Physics  

E-Print Network [OSTI]

Some recent precision experiments in low energy muon physics are discussed. Spectroscopy on the muonium atom, the bound state of a positve muon and an electron, has provided precise tests of standard theory and yielded most precise values of important fundamental constants. A search for spontaneous muonium to antimuonium conversion test lepton flavour conservation and yields most stringent limits on parameters in several speculative models. The muon magnetic anomaly may contain hints to new physics and is a relevant calibration point for numerous models beyond standard theory. Since most precision experiments are limited by the particle fluxes at present muon sources, possibilities in this field are shown which will emerge at upgraded present facilities or new accelerator complexes under construction or planning. At such places novel techniques would be enabled.

Klaus P. Jungmann

2002-10-16T23:59:59.000Z

362

Alpha-muon sticking and chaos in muon-catalysed "in flight" d-t fusion  

E-Print Network [OSTI]

We discuss the alpha-muon sticking coefficient in the muon-catalysed ``in flight" d-t fusion in the framework of the Constrained Molecular Dynamics model. Especially the influence of muonic chaotic dynamics on the sticking coefficient is brought into focus. The chaotic motion of the muon affects not only the fusion cross section but also the $\\mu-\\alpha$ sticking coefficient. Chaotic systems lead to larger enhancements with respect to regular systems because of the reduction of the tunneling region. Moreover they give smaller sticking probabilities than those of regular events. By utilizing a characteristic of the chaotic dynamics one can avoid losing the muon in the $\\mu$CF cycle. We propose the application of the so-called ``microwave ionization of a Rydberg atom" to the present case which could lead to the enhancement of the reactivation process by using X-rays.

Sachie Kimura; Aldo Bonasera

2006-05-24T23:59:59.000Z

363

High-Energy Muon-Proton Scattering: Muon-Electron Universality  

Science Journals Connector (OSTI)

Measurements of the ?-p elastic cross section in the range 0.15muon and electron experiments which can possibly be accounted for by a combination of systematic normalization errors.

L. Camilleri; J. H. Christenson; M. Kramer; L. M. Lederman; Y. Nagashima; T. Yamanouchi

1969-07-21T23:59:59.000Z

364

Searches for muon-electron and muon-positron conversion in titanium  

Science Journals Connector (OSTI)

Searches have been performed for neutrinoless muon-electron conversion and muon-positron conversion using a time projection chamber. An upper limit on the branching ratio for the coherent reaction R(?- +Ti?e-+Ti)muon capture was obtained. For the process ?-+Ti?e++Ca no events were observed for positron momenta p>96 MeV/c leading to an upper limit on the partial branching ratio relative to ordinary muon capture ?p>96(?-+Ti?e+ +Ca)/?(?-+Ti?capture) <9×10-12 (90% C.L.). With the assumption of a giant-resonance-excitation model the integrated limit would be ?(?-+Ti?e++Ca)/?(?- +Ti?capture)<1.7×10-10 (90% C.L.).

S. Ahmad; G. Azuelos; M. Blecher; D. Bryman; R. A. Burnham; E. T. H. Clifford; P. Depommier; M. S. Dixit; K. Gotow; C. K. Hargrove; M. Hasinoff; J. A. Macdonald; H. Mes; T. Numao; J.-M. Poutissou; R. Poutissou; J. Spuller; J. Summhammer

1987-08-31T23:59:59.000Z

365

The Muon and Muon Pair Production in Electron-Positron Annihilation  

Science Journals Connector (OSTI)

The muon was discovered in cosmic rays in 1937... 11.1 $$ m_e = 0.5110034(14)MeV, m_\\mu = 105.65932(29)MeV. $$ ...

Otto Nachtmann

1990-01-01T23:59:59.000Z

366

Using Plain Writing at CMS Meeting the Requirements of  

E-Print Network [OSTI]

1 Using Plain Writing at CMS Meeting the Requirements of the Plain Writing Act of 2010 #12;The Plain Writing Act of 2010 All Federal agencies must use plain writing in any document that how to comply with Federal requirements This means we must use plain writing principles in everything

Bandettini, Peter A.

367

Searches for new phenomena at CMS and ATLAS  

E-Print Network [OSTI]

The prospects of the ATLAS and CMS experiments at LHC for beyond standard model searches are depicted in this document. The presented studies concentrate on the search plans for supersymmetry (SUSY) and beyond in the first few years of data taking.

Tanja Rommerskirchen; for the CMS; ATLAS collaborations

2009-05-26T23:59:59.000Z

368

Observation of Muon Trident Production in Lead and the Statistics of the Muon  

Science Journals Connector (OSTI)

We have observed the production of muon tridents in lead with an effective cross section of 51 ± 7 nb per nucleus, in agreement with the predictions of quantum electrodynamics. This measurement is sufficiently accurate that the interference term due to the presence of two identical muons in the final state is seen. The size of the measured interference term is 1.15 ± 0.25 times the value predicted for Fermi statistics.

J. J. Russell; R. C. Sah; M. J. Tannenbaum; W. E. Cleland; D. G. Ryan; D. G. Stairs

1971-01-04T23:59:59.000Z

369

H{sup -} beam transport experiments in a solenoid low energy beam transport  

SciTech Connect (OSTI)

The Front End Test Stand (FETS) is located at Rutherford Appleton Laboratory and aims for a high current, fast chopped 3 MeV H{sup -} ion beam suitable for future high power proton accelerators like ISIS upgrade. The main components of the front end are the Penning ion source, a low energy beam transport line, an radio-frequency quadrupole (RFQ) and a medium energy beam transport (MEBT) providing also a chopper section and rebuncher. FETS is in the stage of commissioning its low energy beam transport (LEBT) line consisting of three solenoids. The LEBT has to transport an H{sup -} high current beam (up to 60 mA) at 65 keV. This is the injection energy of the beam into the RFQ. The main diagnostics are slit-slit emittance scanners for each transversal plane. For optimizing the matching to the RFQ, experiments have been performed with a variety of solenoid settings to better understand the actual beam transport. Occasionally, source parameters such as extractor slit width and beam energy were varied as well. The paper also discusses simulations based on these measurements.

Gabor, C. [ASTeC Intense Beams Group, Rutherford Appleton Laboratory, Chilton, Didcot - Oxfordshire OX11 0QX (United Kingdom); Back, J. J. [High Energy Physics Department, University of Warwick, Coventry CV4 7AL (United Kingdom); Faircloth, D. C.; Lawrie, S. R.; Letchford, A. P. [ISIS Pulsed Spallation Neutron Source, Rutherford Appleton Laboratory, Chilton, Didcot - Oxfordshire OX11 0QX (United Kingdom); Izaola, Z. [ESS Bilbao, Accelerator Physics Group, Edificio Cosimet Paseo Landabarri, 2, 1 Planta. 48940 Leioa (Spain)

2012-02-15T23:59:59.000Z

370

D0 Silicon Upgrade: Pipe Sizing for Solenoid / VLPC Cryogenic Systems  

SciTech Connect (OSTI)

The addition of a solenoid magnet and VLPC detectors are two of a number of upgrades which will occur at the D-Zero detector in the near future. Both of these upgrades will require cryogenic services for their operation. The purpose of this engineering note is to document the pipe/tube size choices made for these cryogenic services. This was done by calculating the required flow rates to cool down the magnet and VLPC's over a reasonable length of time and to determine the required piping sizes for a given allowable pressure drop. The pressure drops for steady state conditions also are addressed. The cool down requirements drove the pipe size decision. The raw engineering calculations that were done for this project are included as an appendix to this note. The body of this document discusses the methods and results of the calculations. As a quick summary, Figures 1 and 2 show the size selections. Tables 1 and 2 give a more detailed size and description of each section of Solenoid and VLPC transfer line.

Rucinski, Russ; Sakla, Steve; /Fermilab

1995-02-20T23:59:59.000Z

371

Muon Collider Physics at Very High Energies  

E-Print Network [OSTI]

Muon colliders might greatly extend the energy frontier of collider physics. One can contemplate circular colliders with center-of-mass energies in excess of 10 TeV. Some physics issues that might be relevant at such a machine are discussed.

M. S. Berger

2000-01-03T23:59:59.000Z

372

Multi-muon events at CDF  

SciTech Connect (OSTI)

We report a study of multi-muon events produced at the Fermilab Tevatron collider and recorded by the CDF II detector. In a data set acquired with a dedicated dimuon trigger and corresponding to an integrated luminosity of 2100 pb{sup -1}, we isolate a significant sample of events in which at least one of the identified muons has large impact parameter and is produced outside the beam pipe of radius 1.5 cm. We are unable to fully account for the number and properties of the events through standard model processes in conjunction with our current understanding of the CDF II detector, trigger and event reconstruction. Several topological and kinematic properties of these events are also presented. In contrast, the production cross section and kinematics of events in which both muon candidates are produced inside the beam pipe are successfully modeled by known QCD processes which include heavy flavor production. The presence of these anomalous multi-muon events offers a plausible resolution to long-standing inconsistencies related to b{bar b} production and decay.

Ptochos, F.; /Cyprus U.

2009-07-01T23:59:59.000Z

373

Geophysical muon imaging: feasibility and limits  

Science Journals Connector (OSTI)

......Gaussian with mean N and standard deviation N. However...interval is obtained through standard procedure and we have...made very constructive reviews of a former version of...2010. Muon tomography: plans for observations in the...measurements with application in mining geophysics, Geophysics......

N. Lesparre; D. Gibert; J. Marteau; Y. Déclais; D. Carbone; E. Galichet

2010-12-01T23:59:59.000Z

374

Muon decay in a laser field  

Science Journals Connector (OSTI)

We investigate the change in the decay rate of a muon caused by embedding it in the field of a laser. A previous paper found that the change could be large, as much as an order of magnitude. We find the more intuitive result that the change is small and give analytic expressions for the small corrections.

Duane A. Dicus; Arsham Farzinnia; Wayne W. Repko; Todd M. Tinsley

2009-01-12T23:59:59.000Z

375

The Weak Interactions of the Muon  

Science Journals Connector (OSTI)

20 April 1965 research-article The Weak Interactions of the Muon R. H. Dalitz The Royal Society is collaborating with JSTOR to digitize, preserve, and extend access to Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences. www.jstor.org

1965-01-01T23:59:59.000Z

376

Muon Collider Machine-Detector Interface  

SciTech Connect (OSTI)

In order to realize the high physics potential of a Muon Collider (MC) a high luminosity of {mu}{sup +}{mu}{sup -}-collisions at the Interaction Point (IP) in the TeV range must be achieved ({approx}10{sup 34} cm{sup -2}s{sup -1}). To reach this goal, a number of demanding requirements on the collider optics and the IR hardware - arising from the short muon lifetime and from relatively large values of the transverse emittance and momentum spread in muon beams that can realistically be obtained with ionization cooling should be satisfied. These requirements are aggravated by limitations on the quadrupole gradients as well as by the necessity to protect superconducting magnets and collider detectors from muon decay products. The overall detector performance in this domain is strongly dependent on the background particle rates in various sub-detectors. The deleterious effects of the background and radiation environment produced by the beam in the ring are very important issues in the Interaction Region (IR), detector and Machine-Detector Interface (MDI) designs. This report is based on studies presented very recently.

Mokhov, Nikolai V.; /Fermilab

2011-08-01T23:59:59.000Z

377

Multi-muon events at CDF  

E-Print Network [OSTI]

We report a study of multi-muon events produced at the Fermilab Tevatron collider and recorded by the CDF II detector. In a data set acquired with a dedicated dimuon trigger and corresponding to an integrated luminosity of 2100 pb$^{-1}$, we isolate a significant sample of events in which at least one of the identified muons has large impact parameter and is produced outside the beam pipe of radius 1.5 cm. We are unable to fully account for the number and properties of the events through standard model processes in conjunction with our current understanding of the CDF II detector, trigger and event reconstruction. Several topological and kinematic properties of these events are also presented. In contrast, the production cross section and kinematics of events in which both muon candidates are produced inside the beam pipe are successfully modeled by known QCD processes which include heavy flavor production. The presence of these anomalous multi-muon events offers a plausible resolution to long-standing inconsistencies related to $b\\bar{b}$ production and decay.

F. Ptochos

2009-07-01T23:59:59.000Z

378

Atmospheric muon background in the ANTARES detector  

E-Print Network [OSTI]

An evaluation of the background due to atmospheric muons in the ANTARES high energy neutrino telescope is presented. Two different codes for atmospheric shower simulation have been used. Results from comparisons between these codes at sea level and detector level are presented. The first results on the capability of ANTARES to reject this class of background are given.

S. Cecchini; E. Korolkova; A. Margiotta; L. Thompson

2005-10-28T23:59:59.000Z

379

CMS HF calorimeter PMTs and Xi(c)+ lifetime measurement  

SciTech Connect (OSTI)

This thesis consists of two parts: In the first part we describe the Photomultiplier Tube (PMT) selection and testing processes for the Hadronic Forward (HF) calorimeter of the CMS, a Large Hadron Collier (LHC) experiment at CERN. We report the evaluation process of the candidate PMTs from three different manufacturers, the complete tests performed on the 2300 Hamamatsu PMTs which will be used in the HF calorimeter, and the details of the PMT Test Station that is in University of Iowa CMS Laboratories. In the second part we report the {Xi}{sub c}{sup +} lifetime measurement from SELEX, the charm hadro-production experiment at Fermilab. Based upon 301 {+-} 31 events from three di.erent decay channels, by using the binned maximum likelihood technique, we observe the lifetime of {Xi}{sub c}{sup +} as 427 {+-} 31 {+-} 13 fs.

Akgun, Ugur; /Iowa U.

2003-12-01T23:59:59.000Z

380

Structural analysis of a superconducting central solenoid for the Tokamak Physics Experiment  

SciTech Connect (OSTI)

The Tokamak Physics Experiment (TPX) concept design uses superconducting coils to accomplish magnetic confinement. The central solenoid (CS) magnet is divided vertically into 8 equal segments which are powered independently. The eddy current heating from the pulsed operation is too high for a case type construction; therefore, a {open_quotes}no case{close_quotes} design has been chosen. This {open_quotes}no case{close_quotes} design uses the conductor conduit as the primary structure and the electrical insulation as a structural adhesive. This electrical insulation is the {open_quotes}weak link{close_quotes} in the coil winding pack structure and needs to be modeled in detail. A global finite element model with smeared winding pack properties was used to study the CS magnet structural behavior. The structural analysis results and peak stresses will be presented.

O`Connor, T.G.; Heim, J.R.

1993-09-15T23:59:59.000Z

Note: This page contains sample records for the topic "muon solenoid cms" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Refurbishment and Testing of the 1970's Era LASS Solenoid Coils for JLab's Hall D  

SciTech Connect (OSTI)

JLab refurbished the LASS1, 1.85 m bore Solenoid, consisting of four superconducting coils to act as the principal analysis magnet for nuclear physics in the newly constructed, Hall D at Jefferson Lab. The coils, built in 1971 at Stanford Linier Accelerator Center and used a second time at the MEGA Experiment at Los Alamos, had electrical shorts and leaks to the insulating vacuum along with deteriorated superinsulation & instrumentation. Root cause diagnosis of the problems and the repair methods are described along with the measures used to qualify the vessels and piping within the Laboratory's Pressure Safety Program (mandated by 10CFR851). The extraordinary refrigerator operational methods used to utilize the obsolete cryogenic apparatus gathered for the off-line, single coil tests are described.

Anumagalla, Ravi; Biallas, George; Brindza, Paul; Carstens, Thomas; Creel, Jonathan; Egiyan, Hovanes; Martin, Floyd; Qiang, Yi; Spiegel, Scot; Stevens, Mark; Wissmann, Mark

2012-07-01T23:59:59.000Z

382

Failure Scenarios and Mitigations and for the BaBar Superconducting Solenoid  

SciTech Connect (OSTI)

The cryogenic department at the Stanford Linear Accelerator Center is responsible for the operation, troubleshooting, and upgrade of the 1.5 Tesla superconducting solenoid detector for the BABAR B-factory experiment. Events that disable the detector are rare but significantly impact the availability of the detector for physics research. As a result, a number of systems and procedures have been developed over time to minimize the downtime of the detector, for example improved control systems, improved and automatic backup systems, and spares for all major components. Together they can prevent or mitigate many of the failures experienced by the utilities, mechanical systems, controls and instrumentation. In this paper we describe various failure scenarios, their effect on the detector, and the modifications made to mitigate the effects of the failure. As a result of these modifications the reliability of the detector has increased significantly with only 3 shutdowns of the detector due to cryogenics systems over the last 2 years.

Thompson, EunJoo; Candia, A.; Craddock, W.W.; Racine, M.; Weisend, J.G., II; /SLAC

2005-12-13T23:59:59.000Z

383

TURBULENCE IN THE INTERGALACTIC MEDIUM: SOLENOIDAL AND DILATATIONAL MOTIONS AND THE IMPACT OF NUMERICAL VISCOSITY  

SciTech Connect (OSTI)

We use a suite of cosmological hydrodynamical simulations, run by two fixed grid codes, to investigate the properties of solenoidal and dilatational motions of the intergalactic medium (IGM) and the impact of numerical viscosity on turbulence in an ?CDM universe. The codes differ only in the spatial difference discretization. We find that (1) The vortical motion grows rapidly since z = 2 and reaches ?10 km s{sup –1}-90 km s{sup –1} at z = 0. Meanwhile, the small-scale compressive ratio r{sub CS} drops from 0.84 to 0.47, indicating comparable vortical and compressive motions at z = 0. (2) Power spectra of the solenoidal velocity possess two regimes, ?k {sup –0.89} and ?k {sup –2.02}, while the total and dilatational velocity follow the scaling k {sup –1.88} and k {sup –2.20}, respectively, in the turbulent range. The IGM turbulence may contain two distinct phases, the supersonic and post-supersonic phases. (3) The non-thermal pressure support, measured by the vortical kinetic energy, is comparable with the thermal pressure for ?{sub b} ? 10-100, or T < 10{sup 5.5} K at z = 0.0. The deviation of the baryon fraction from the cosmic mean shows a preliminary positive correlation with the turbulence pressure support. (4) A relatively higher numerical viscosity would dissipate both the compressive and vortical motions of the IGM into thermal energy more effectively, resulting in less developed vorticity, remarkably shortened inertial range, and leading to a non-negligible uncertainty in the thermal history of gas accretion. Shocks in regions outside of clusters are significantly suppressed by numerical viscosity since z = 2, which may directly cause the different levels of turbulence between the two codes.

Zhu, Weishan; Gu, Qiusheng [School of Astronomy and Space Science, Nanjing University, Nanjing, 210092 (China); Feng, Long-long [Purple Mountain Observatory, Nanjing, 210008 (China); Xia, Yinhua [School of Mathematical Sciences, University of Science and Technology of China, Hefei, Anhui 230026 (China); Shu, Chi-Wang [Division of Applied Mathematics, Brown University, Providence, RI 02912 (United States); Fang, Li-Zhi [Department of Physics, University of Arizona, Tucson, AZ 85721 (United States)

2013-11-01T23:59:59.000Z

384

Muon energy reconstruction in the ANTARES detector  

Science Journals Connector (OSTI)

The energy reconstruction of both neutrino-induced muons from neutrino interactions in the vicinity of the detector and of muons from cosmic ray air showers contributes indispensable information for a broad range of physics analyses, e.g. by increasing the sensitivity in neutrino point source searches or in offering access to observables such as the atmospheric neutrino spectrum. Currently, four energy reconstruction methods are implemented in the ANTARES data analysis framework, ranging from estimates based on photon counting and the total charge deposited in the detector to methods based on probability density functions and Artificial Neural Networks. These four methods, their performance and systematic studies of the energy resolution capabilities of the ANTARES detector are presented.

Jutta Schnabel

2013-01-01T23:59:59.000Z

385

An update of muon capture on hydrogen  

E-Print Network [OSTI]

The successful precision measurement of the rate of muon capture on a proton by the MuCap Collaboration allows for a stringent test of the current theoretical understanding of this process. Chiral perturbation theory, which is a low-energy effective field theory that preserves the symmetries and the pattern of symmetry breaking in the underlying theory of QCD, offers a systematic framework for describing $\\mu p$ capture and provides a basic test of QCD at the hadronic level. We describe how this effective theory with no free parameters reproduces the measured capture rate. A recent study has addressed new sources of uncertainties that were not considered in the previous works, and we review to what extent these uncertainties are now under control. Finally, the rationale for studying muon capture on the deuteron and some recent theoretical developments regarding this process are discussed.

S. Pastore; F. Myhrer; K. Kubodera

2014-05-06T23:59:59.000Z

386

Photonuclear Interactions of High-Energy Muons  

Science Journals Connector (OSTI)

A calculation of the photonuclear energy-loss coefficient bn is made by extrapolating recent SLAC inelastic muon scattering data to the 1012-eV energy region. Previous methods of calculation are discussed, and attention is drawn to the q2 dependence of the inelastic cross section. It is also noted that bn should be A dependent. This is predicted from vector dominance and indicated by the SLAC data on photoproduction off complex nuclei. The value of bn obtained is 0.21×10-6 g-1 cm2. The relationship of bn to observed cosmic-ray muon intensities is discussed, along with the implications of higher bn values than are predicted here.

G. L. Cassiday

1971-03-01T23:59:59.000Z

387

Tests of a calorimetric technique for measuring the energy of cosmic ray muons in the TeV energy range  

Science Journals Connector (OSTI)

Previous energy measurements of cosmic ray muons have used magnetic spectrometers to measure the momentum of muons. Measurements using magnets fail for muons in the TeV range because at ultra-high muon energies, ...

A. P. Chikkatur; L. Bugel; A. Alton…

1997-06-01T23:59:59.000Z

388

Recent results from COMPASS muon scattering measurements  

SciTech Connect (OSTI)

A sample of recent results in muon scattering measurements from the COMPASS experiment at CERN will be reviewed. These include high energy processes with longitudinally polarised proton and deuteron targets. High energy polarised measurements provide important constraints for studying the nucleon spin structure and thus permit to test the applicability of the theoretical framework of factorisation theorems and perturbative QCD. Specifically, latest results on longitudinal quark polarisation, quark helicity densities and gluon polarisation will be reviewed.

Capozza, Luigi [Irfu/SPhN - CEA Saclay, 91190 Gif-sur-Yvette (France); Collaboration: COMPASS Collaboration

2012-10-23T23:59:59.000Z

389

High-energy cosmic-ray muons at ground level and below ground level  

Science Journals Connector (OSTI)

Cosmic-ray muon interactions have been studied in an analysis of very recent measurements of cosmic-ray muons at sea-level and large depths underground ... By starting with the very carefully measured vertical muon

C. R. Paul; N. Chaudhuri

1977-01-11T23:59:59.000Z

390

Study of High pT Muons in IceCube  

E-Print Network [OSTI]

be determined from the muon energy (measured by dE/dx) andthe incident nucleon. The muon energy and p T can be relatedshowers. Most of the high-energy muons that are visible in

Gerhardt, Lisa; IceCube Collaboration

2009-01-01T23:59:59.000Z

391

Sensitivity of the icecube detector to astrophysical sources of high energy muon neutrinos  

E-Print Network [OSTI]

as a function of muon energy and angle of incidence. WeKopp and Voss [38] (for muon energies smaller than 10 5.5and Stanev [33] (for muon energies greater than 10 5.5 GeV).

2004-01-01T23:59:59.000Z

392

STUDY OF RARE PROCESSES INDUCED BY 209-GeV MUONS  

E-Print Network [OSTI]

^ for the effect of muon energy loss in each magnet segment.virtual photon and beam muon energy- loss v. f = l°g (Pj. )o n of the laboratory muon energy re- N and considering only

Smith, W.H.

2010-01-01T23:59:59.000Z

393

Nuclear Interaction of Very High Energy Muons at Large Momentum Transfer  

Science Journals Connector (OSTI)

......Nuclear Interaction of Very High Energy Muons at Large Momentum Transfer Kimio...nuclear interaction of very high energy muons with large energy transfers of...Nuclear Interaction of Very High Energy Muons at Large Mlomentum Transfer Kimio......

Kimio Fujimura

1965-07-01T23:59:59.000Z

394

Studying High pT muons in Cosmic-Ray Air Showers  

E-Print Network [OSTI]

threshold is about 500 GeV Muon energy, E µ is measured byabout 30 m [6]. With the muon energy and distance from the7]. 3) Uncertainty in the muon energy and posi- tion, due to

Klein, Spencer R.

2006-01-01T23:59:59.000Z

395

Distribution of Four-Momentum Transfer in Multiple Meson Productions by High Energy Muons  

Science Journals Connector (OSTI)

......Multiple Meson Productions by High Energy Muons S. Higashi T. Kitamura Y. Mishima...Multiple Meson Productions by High Energy Muons S. Higashi, T. Kitamura, Y...production. Provided that the high energy muon-nucleon inter- actions occur......

S. Higashi; T. Kitamura; Y. Mishima; S. Miyamoto; H. Shibata; Y. Watase; K. Daiyasu; K. Kobayakawa; T. Murota; T. Nakano

1964-01-01T23:59:59.000Z

396

Search for muon neutrinos from Gamma-Ray Bursts with the IceCube neutrino telescope  

E-Print Network [OSTI]

of California. Search for muon neutrinos from Gamma-RaySearch for muon neutrinos from Gamma-Ray Bursts with theof searches for high-energy muon neutrinos from 41 gamma-

Abbasi, R.

2010-01-01T23:59:59.000Z

397

ESTIMATION OF THE MEAN ENERGY OF MUONS IN MULTILAYER DETECTORS  

E-Print Network [OSTI]

The technique of muon mean energy determination in multilayer detectors is developed. The mean energy is measured by means of average small bursts $m$ i.e. the number of electrons and positrons generated by muons in the detecting layers of device via three basic processes --- creation of $e^+e^-$ pairs, $\\delta$-electrons and bremsestrahlung. The accuracy of the method is considered. Key words: muon energy, multilayer detectors.

T. T. BARNAVELI; Yu. G. VERBETSKY; I. V. KHALDEEVA; N. A. ERISTAVI

1995-05-30T23:59:59.000Z

398

Muon-Induced Backgrounds in Double Chooz Emily Conover  

E-Print Network [OSTI]

to scintillator 8 MeV n capture energy, 30µs backgrounds due to muons remain E¯e = Ee+ + 10-40keV En + 1.8MeMuon-Induced Backgrounds in Double Chooz Emily Conover University of Chicago Second Thesis and Stopped Muons 9Li and 8He 3. Double Chooz Results 4. Conclusions Timeline/Future work Emily Conover (Univ

399

MUON STORAGE RINGS FOR 6D PHASE SPACE COOLING.  

SciTech Connect (OSTI)

We describe several storage ring designs for reducing the 6-dimensional phase space of circulating muon beams. These rings utilize quadrupole and dipole magnets as well as wedge-shaped, liquid-hydrogen, energy-loss absorbers and energy compensating rf cavities. We obtain evaluations of their cooling performance by particle tracking simulation. Such rings are potentially useful for future Neutrino Factories or Muon Colliders as well as for existing facilities in which cooled, intense muon beams could enhance their physics programs.

KIRK,H.CLINE,D.FUKUI,Y.GARREN,A.

2003-05-12T23:59:59.000Z

400

Muon Endcap Trigger Electronics Document presented for FDR  

E-Print Network [OSTI]

Muon Endcap Trigger Electronics Document presented for FDR held on March 1, 2004 CF High-pT (Hi information from both inputs are made coincidence in the matrix block to identify high pT muons (pT > 20 GeV/c). Maximum two highest pT muons can be selected in 2-out-of- 6 select block, and the position data

Fukunaga, Chikara

Note: This page contains sample records for the topic "muon solenoid cms" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Jack Steinberger and the Muon-Neutrino  

Office of Scientific and Technical Information (OSTI)

Jack Steinberger and the Muon-Neutrino Resources with Additional Information Jack Steinberger Photograph by Harry Sticker, courtesy AIP Emilio Segre Visual Archives, Physics Today Collection In an interview, Jack Steinberger spoke about his 1988 Nobel Prize winning research. He states "I did an experiment, together with several other people at Brookhaven National Laboratory ... which showed that there is a second kind of neutrino. The neutrino has elementary particles. Elementary particles exist in families of particles ... . At the time, the elementary particles which were involved were the electrons and the neutrino. ... [W]e required the [BNL] accelerator, which was the effort of very many people, ... and this allowed [us] to make a beam of these neutrinos, and we were able to convince ourselves that these neutrinos were not the same kind of neutrinos as those which had been seen before. They were associated with not electrons, but with something called [muons]. So we were able to understand that there is a different neutrino associated with the [muon] than with the electron.

402

Muon decay in orbit: Spectrum of high-energy electrons  

Science Journals Connector (OSTI)

Experimental searches for lepton-flavor-violating coherent muon-to-electron conversion in the field of a nucleus, have been proposed to reach the unprecedented sensitivity of 10-16–10-18 per stopped muon. At that level, they probe new interactions at effective-mass scales well beyond 1000 TeV. However, they must contend with background from ordinary bound muon decay. To better understa560nd the background-spectrum shape and rate, we have carried out a detailed analysis of Coulombic-bound-state muon decay, including nuclear recoil. Implications for future experiments are briefly discussed.

Andrzej Czarnecki, Xavier Garcia i Tormo, and William J. Marciano

2011-07-14T23:59:59.000Z

403

Energy calibration of large underwater detectors using stopping muons  

E-Print Network [OSTI]

We propose to use stopping cosmic-ray muons in the energy calibration of planned and deployed large underwater detectors. The method is based on the proportionality between the incident muon energy and the length of the muon path before it stops. Simultaneous measurements of the muon path and the amplitude of the signal from the photomultiplier tubes allow a relation between the energy deposited in the sensitive volume of the detector and the observed signal to be derived, and also provide a test of detector simulations. We describe the proposed method and present the results of simulations.

V. A. Kudryavtsev; R. A. Brook; S. L. Cartwright; J. E. McMillan; N. J. C. Spooner; L. F. Thompson

2000-10-21T23:59:59.000Z

404

Muons and Neutrinos at High-Energy Accelerators  

Science Journals Connector (OSTI)

Background levels in detectors and radiation problems at future colliders — whether pp, e + e - or ?+ ?- are in large part determined by the presence of muons. Neutrinos ...

N. Mokhov; S. Striganov; A. Van Ginneken

2001-01-01T23:59:59.000Z

405

Energy calibration of large underwater detectors using stopping muons  

Science Journals Connector (OSTI)

We propose to use stopping cosmic-ray muons in the energy calibration of planned and deployed large underwater detectors. The method is based on the proportionality between the incident muon energy and the length of the muon path before it stops. Simultaneous measurements of the muon path and the amplitude of the signal from the photomultiplier tubes allow a relation between the energy deposited in the sensitive volume of the detector and the observed signal to be derived, and also provide a test of detector simulations. We describe the proposed method and present the results of simulations.

V.A. Kudryavtsev; R.A. Brook; S.L. Cartwright; J.E. McMillan; N.J.C. Spooner; L.F. Thompson

2000-01-01T23:59:59.000Z

406

On muons of energy ?150 Gev in association with EAS  

Science Journals Connector (OSTI)

Preliminary results of an investigation on energetic penetrating particles (muons) of energy ?150 Gev are reported. These particles...4–105 particles.

B. Chowdhury; Y. C. Saxena

1971-02-01T23:59:59.000Z

407

Time correlations of high energy muons in an underground detector  

E-Print Network [OSTI]

We present the result of a search for correlations in the arrival times of high energy muons collected from 1995 till 2000 with the streamer tube system of the complete MACRO detector at the underground Gran Sasso Lab. Large samples of single muons (8.6 million), double muons (0.46 million) and multiple muons with multiplicities from 3 to 6 (0.08 million) were selected. These samples were used to search for time correlations of cosmic ray particles coming from the whole upper hemisphere or from selected space cones. The results of our analyses confirm with high statistics a random arrival time distribution of high energy cosmic rays.

Y. Becherini; S. Cecchini; T. Chiarusi; M. Cozzi; H. Dekhissi; J. Derkaoui; L. S. Esposito; G. Giacomelli; M. Giorgini; N. Giglietto; F. Maaroufi; G. Mandrioli; A. Margiotta; S. Manzoor; A. Moussa; L. Patrizii; V. Popa; M. Sioli; G. Sirri; M. Spurio; V. Togo

2005-02-12T23:59:59.000Z

408

Local Fermi gas in inclusive muon capture from nuclei  

E-Print Network [OSTI]

We compare local Fermi gas and shell model in muon capture in nuclei in order to estimate the effect of finite nuclear size in low energy weak reactions.

J. E. Amaro; J. Nieves; M. Valverde; C. Maieron

2006-05-20T23:59:59.000Z

409

Toroidal magnetic detector for high resolution measurement of muon momenta  

DOE Patents [OSTI]

A muon detector system including central and end air-core superconducting toroids and muon detectors enclosing a central calorimeter/detector. Muon detectors are positioned outside of toroids and all muon trajectory measurements are made in a nonmagnetic environment. Internal support for each magnet structure is provided by sheets, located at frequent and regularly spaced azimuthal planes, which interconnect the structural walls of the toroidal magnets. In a preferred embodiment, the shape of the toroidal magnet volume is adjusted to provide constant resolution over a wide range of rapidity. 4 figs.

Bonanos, P.

1992-01-07T23:59:59.000Z

410

The performance of the MICE muon beam line  

SciTech Connect (OSTI)

The Muon Ionization Cooling Experiment is one lattice cell of a cooling channel suitable for conditioning the muon beam at the front end of a Neutrino Factory or Muon Collider. The beam line designed to transport muons into MICE has been installed, and data was collected in 2010. In this paper the method of reconstructing longitudinal momentum and transverse trace space using two timing detectors is discussed, and a preliminary simulation of the performance of a measured beam in the cooling channel is presented.

Rayner, Mark Alastair [University of Oxford (United Kingdom)

2011-10-06T23:59:59.000Z

411

Toroidal magnetic detector for high resolution measurement of muon momenta  

DOE Patents [OSTI]

A muon detector system including central and end air-core superconducting toroids and muon detectors enclosing a central calorimeter/detector. Muon detectors are positioned outside of toroids and all muon trajectory measurements are made in a nonmagnetic environment. Internal support for each magnet structure is provided by sheets, located at frequent and regularly spaced azimuthal planes, which interconnect the structural walls of the toroidal magnets. In a preferred embodiment, the shape of the toroidal magnet volume is adjusted to provide constant resolution over a wide range of rapidity.

Bonanos, Peter (East Brunswick, NJ)

1992-01-01T23:59:59.000Z

412

Muon Spin Relaxation Study of the Spin Transition Compound [Fe(Phen)2(NCS)2  

Science Journals Connector (OSTI)

The muons enter the sample with their polarization antiparallel to the beam direction, chosen as the z direction, and decay with a mean lifetime of 2.2 ?s, emitting positrons preferentially along the muon spin direction that are detected by scintillation detectors which surround the sample. ... In these expts., implanted muons were used to study the magnitude, distribution and dynamics of the local field at the muon site. ... (11)?Muon Science:? Muons in Physics, Chemistry and Solids. ...

Y. Garcia; V. Ksenofontov; S. J. Campbell; J. S. Lord; Y. Boland; P. Gütlich

2004-10-22T23:59:59.000Z

413

CMS Distribution Subsystem user`s guide. Software Version 2.0  

SciTech Connect (OSTI)

The Common Mapping Standard (CMS) Data Production System (CDPS) produces and distributes CMS data in compliance with the Common Mapping Standard Interface Control Document. CDPS is composed of two subsystems the CMS Distribution Subsystem (CDS) and the CMS Preprocessing Subsystem (CPS). This guide describes the operation of CDS. CDS is responsible for the management of archived CMS data, the management of production orders, and the generation of theater databases. This subsystem was developed for use on a workstation running Ultrix 4.2, the X Window System Version X11R4, and motif Version 1.1. CDS is organized into seven major functional groups and supports archiving and distributing CMS data for selected products.

Gash, J.D.; Greitzer, F.L.; Hatfield, L.D.; Portwood, M.H.; Turney, C.R.

1993-12-01T23:59:59.000Z

414

CMS Preprocessing Subsystem user`s guide: Software Version 2.0  

SciTech Connect (OSTI)

The Common Mapping Standard (CMS) Data Production System (CDPS) produces and distributes CMS data in compliance with the Common Mapping Standard Interface Control Document. CDPS is composed of two subsystems, the CMS Preprocessing Subsystem (CPS) and the CMS Distribution Subsystem (CDS). This guide describes the operation of CPS. CPS is responsible for the management of source data and the production of CMS data from source data. The CPS system was developed for use on a workstation running Ultrix 4.2, the X Window System Version X11R4, and motif Version 1.1. This subsystem is organized into four major functional groups and supports production of CMS data from source chart, indose, and elevation data products.

Didier, B.T.; Gash, J.D.; Greitzer, F.L.; Havre, S.L.; Ramsdell, J.V.; Turney, C.R.

1993-12-01T23:59:59.000Z

415

Muon–alpha-particle sticking probability in muon-catalyzed fusion  

Science Journals Connector (OSTI)

The Green’s-function Monte Carlo method is used to calculate the ground-state wave function of the muonic-molecular ion composed of a negative muon bound to a deuteron and a triton. Using the sudden approximation, the probability that the muon will remain bound to the escaping alpha particle after fusion occurs is found to be 0.90%, about 25% smaller than previous estimates based on the Born-Oppenheimer approximation. The numerical method for determining the wave function is discussed in detail.

D. Ceperley and B. J. Alder

1985-04-01T23:59:59.000Z

416

Juraj Bracink, Hadron Structure, Modra, September 2007 Physics with eP collisions at highest Q2  

E-Print Network [OSTI]

) Solenoidal magnet Muon system Depleted uranium calorimeter #12;Juraj Braciník, Hadron Structure, Modra

417

E-Print Network 3.0 - altitude muons deconvolved Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Search Powered by Explorit Topic List Advanced Search Sample search results for: altitude muons deconvolved Page: << < 1 2 3 4 5 > >> 1 Muon pair production by photons in...

418

E-Print Network 3.0 - atlas muon endcap Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

First Result of Global Commissioning of the ATALS Endcap Muon Trigger System in ATLAS Cavern Summary: The First Result of Global Commissioning of the ATALS Endcap Muon Trigger...

419

E-Print Network 3.0 - atlas 1st-level muon Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

First Result of Global Commissioning of the ATALS Endcap Muon Trigger System in ATLAS Cavern Summary: The First Result of Global Commissioning of the ATALS Endcap Muon Trigger...

420

E-Print Network 3.0 - atlas high-level muon Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Pontecorvo, Installation and Commissioning of the ATLAS MUON... recorded in the ATLAS cavern with two muon ... Source: Ecole Polytechnique, Centre de mathmatiques Collection:...

Note: This page contains sample records for the topic "muon solenoid cms" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

E-Print Network 3.0 - atlas mdt muon Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

First Result of Global Commissioning of the ATALS Endcap Muon Trigger System in ATLAS Cavern Summary: The First Result of Global Commissioning of the ATALS Endcap Muon Trigger...

422

The cosmic muon flux in the ATLAS Detector at the Large Hadron Collider.  

E-Print Network [OSTI]

??Many ATLAS analyses study events with muons in them including those searching for the Higgs boson and new physics. Cosmics muons, however, can also occasionally… (more)

Hill, Ewan Chin

2011-01-01T23:59:59.000Z

423

E-Print Network 3.0 - avec des muons Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Mathematics 66 Implementation and Performance of the Event Filter Muon Selection for the ATLAS experiment at LHC Summary: Implementation and Performance of the Event Filter Muon...

424

Results of the CMS searches for a standard model Higgs boson  

Science Journals Connector (OSTI)

In this chapter, the results of the searches for a standard model Higgs boson at CMS are presented. After an overview...

Giovanni Petrucciani

2013-01-01T23:59:59.000Z

425

Fermilab | Science at Fermilab | Experiments & Projects | Energy Frontier |  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Physics Physics Energy Frontier Fermilab's Contribution to LHC Physics Physics Fermilab is involved in most aspects of the Compact Muon Solenoid experiment. The CMS detector is designed to detect objects physicists identify as fundamental: electrons, muons, tau leptons, photons, quark jets and missing energy due to weakly interacting particles such as neutrinos. Massive particles, such as the theorized Higgs boson, will decay into these fundamental particles, and the CMS detector will measure their properties. Fermilab functions as the host laboratory for U.S. efforts in the CMS experiment through its LHC Physics Center, Remote Operations Center and the largest CMS computing center outside of CERN. About 120 Fermilab scientists, postdocs, visiting students, engineers and technicians

426

Nuclear excitation energy in muon capture: A reply  

Science Journals Connector (OSTI)

The parametrization of total muon capture rates in terms of a mean nuclear excitation energy E¯?, recently proposed by Christillin, Dellafiore, and Rosa-Clot, is reexamined in view of recent criticisms. The previously obtained results are reconfirmed.NUCLEAR REACTIONS ?-+A(N, Z)??+A(N+1, Z-1); muon capture; closure approximation; mean nuclear excitation energies.

P. Christillin, A. Dellafiore, and M. Rosa-Clot

1975-08-01T23:59:59.000Z

427

Energy spectrum of muons from their knock-on electrons  

Science Journals Connector (OSTI)

The energy spectrum of muons producing knock-on electrons in medium- and...Z elements has been determined. The energy of a muon can be determined from the energy it transfers to a knock-on electron ... with the d...

A. K. Das

1969-01-11T23:59:59.000Z

428

Measurement of the Michel parameter rho in muon decay  

E-Print Network [OSTI]

The TWIST Collaboration has measured the Michel parameter rho in normal muon decay,u+ -> e+VeVu. In the standard model of particle physics,rho = 3/4. Deviations from this value require mixing of left- and right-handed muon and electron couplings...

Musser, James Raymond

2006-04-12T23:59:59.000Z

429

Detectors for Neutrino Physics at the First Muon Collider  

E-Print Network [OSTI]

We consider possible detector designs for short-baseline neutrino experiments using neutrino beams produced at the First Muon Collider complex. The high fluxes available at the muon collider make possible high statistics deep-inelastic scattering neutrino experiments with a low-mass target. A design of a low-energy neutrino oscillation experiment on the ``tabletop'' scale is also discussed.

Deborah A. Harris; Kevin S. McFarland

1998-04-20T23:59:59.000Z

430

Muon Spin Relaxation Studies on High-Tc Superconductors  

Science Journals Connector (OSTI)

The AGS proton synchrotron at Brookhaven National Laboratory facilitates a medium-intensity polarized muon channel. Muon spin relaxation (?SR) experiments on single...1.85Sr0.15)CuO4 and YBa2Cu3O7...have been car...

W. J. Kossler; J. R. Kempton; A. Moodenbaugh; D. Opie; H. Schone…

1987-01-01T23:59:59.000Z

431

ATLAS Muon TGC Trigger Electronics TTC signal distribution Extended URD  

E-Print Network [OSTI]

ATLAS Muon TGC Trigger Electronics TTC signal distribution Extended URD Version 0 June 2000 1 a TTCrx chip which receives signals distributed by the ATLAS central TTC system. The SPP then extracts to the LVDS level, and #12;ATLAS Muon TGC Trigger Electronics TTC signal distribution Extended URD Version 0

Fukunaga, Chikara

432

ATLAS Muon TGC Trigger Electronics Slave Board ASIC Extended URD  

E-Print Network [OSTI]

ATLAS Muon TGC Trigger Electronics Slave Board ASIC Extended URD Version 0 June 2000 1 Slave Board position of a MATRIX while one from the pivot plane specifies one of the raw. Thus the #12;ATLAS Muon TGC at the highest r is selected from each section giving three hits per an SB chip for the wire triplet. #12;ATLAS

Fukunaga, Chikara

433

MODELING THE MUON COOLING CHANNEL USING MOMENTS B. A. Shadwick  

E-Print Network [OSTI]

to reach the luminosity goals demanded by high- energy physics applications [3]. Furthermore, this cooling Using a moment formalism [1, 2] we model beam trans- port in the muon collider cooling channel. This model con- tains much of the physics we believe to be relevant to muon cooling such as ionization energy

Wurtele, Jonathan

434

PHYSICS AT HIGH LUMINOSITY MUON COLLIDERS AND A FACILITY OVERVIEW.  

SciTech Connect (OSTI)

Physics potentials at future colliders including high luminosity {mu}{sup +}{mu}{sup -} colliders are discussed. Luminosity requirement, estimates for Muon collider energies of interest (0.1 TeV to 100 TeV) are calculated. Schematics and an overview of Muon Collider facility concept are also included.

PARSA,Z.

2001-07-01T23:59:59.000Z

435

Use of proportional tubes in a muon polarimeter  

SciTech Connect (OSTI)

A prototype muon polarimeter was built to study the feasibility of measuring the positive muon polarization in the decay K/sub L/ ..-->.. ..mu../sup +/..mu../sup /minus//. The system consisted of alternating layers of extruded aluminum gas proportional tubes and polarization-retaining absorber plates of either aluminum or marble. Longitudinally polarized positive muons from the Stopped Muon Channel at the Clinton P. Anderson Meson Physics Facility (LAMPF) were stopped in the absorber plates where they precessed in a field of 60 gauss. Decay times were recorded in 100 ns first-in-first-out memories for all wires hit during a 12.8 ..mu..s period centered about the muon stop trigger. The performance of the system was studied for different beam rates and absorber thicknesses. The value of imposing time and spacial cuts on track data to enhance the precession signal was also investigated. 7 refs., 4 figs., 1 tab.

Kenney, C.J.; Eckhause, M.; Ginkel, J.F.; Guss, P.P.; Kane, J.R.; Vulcan, W.F.; Welsh, R.E.; Whyley, R.J.; Bilskie, J.; Hart, G.W.

1988-01-01T23:59:59.000Z

436

Frictional Cooling Scheme for Use in a Muon Collider  

SciTech Connect (OSTI)

The Muon Group at the MPI for Physics, Munich is investigating frictional cooling as a fast muon-beam emittance reduction scheme for a muon collider. A new simulation package, CoolSim, based on Geant4 has been developed for the simulation of low-energy beam cooling. New physics processes for low energy muons and protons have been implemented in the Geant4 framework. The group's Frictional Cooling Demonstration experiment aims to verify the principle of the cooling scheme. For this purpose, a 10-cm-long cooling cell has been constructed to test simulation of the energy loss and scattering mechanisms at low energy. This paper contains an introduction to a muon-collider frictional cooling scheme and the status of the demonstration experiment.

Greenwald, Daniel; Caldwell, Allen [Max-Planck-Insitut fuer Physik, Foehringer Ring 6, 80805 Munich (Germany); Bao, Yu [Max-Planck-Insitut fuer Physik, Foehringer Ring 6, 80805 Munich (Germany); Institute of High Energy Physics, Chinese Academy of Sciences, Beijing (China)

2010-03-30T23:59:59.000Z

437

A precision measurement of the muon decay parameter delta  

E-Print Network [OSTI]

The muon decay parameter delta characterizes momentum dependence of the parity-violating muon decay asymmetry. A new measurement of delta has been performed using the first physics data recorded by the TWIST experiment at TRIUMF. The obtained value, delta=0.74964+-0.00066(stat.)+-0.00112(syst.), is consistent with the Standard Model expectation delta=3/4. This is the first determination of delta performed using a blind analysis technique. Combined with other data, the measurement sets new model-independent limits on effective right-handed couplings of the muon. Improved limits on the product of another muon decay parameter, xi, and the muon polarization in pion decay, Pmu, are obtained in the form: 0.9960Pmu*xi<=xi<1.0040, at 90% confidence level. Implications for left-right symmetric models are discussed.

Gaponenko, Andrei

2011-01-01T23:59:59.000Z

438

A precision measurement of the muon decay parameter delta  

E-Print Network [OSTI]

The muon decay parameter delta characterizes momentum dependence of the parity-violating muon decay asymmetry. A new measurement of delta has been performed using the first physics data recorded by the TWIST experiment at TRIUMF. The obtained value, delta=0.74964+-0.00066(stat.)+-0.00112(syst.), is consistent with the Standard Model expectation delta=3/4. This is the first determination of delta performed using a blind analysis technique. Combined with other data, the measurement sets new model-independent limits on effective right-handed couplings of the muon. Improved limits on the product of another muon decay parameter, xi, and the muon polarization in pion decay, Pmu, are obtained in the form: 0.9960Pmu*xi<=xi<1.0040, at 90% confidence level. Implications for left-right symmetric models are discussed.

Andrei Gaponenko

2011-04-14T23:59:59.000Z

439

Muon Collider: Plans, Progress and Challenges  

E-Print Network [OSTI]

We in the physics community expect the LHC to uncover new physics in the next few years. The character and energy scale of the new physics remain unclear, but it is likely that data from the LHC will need to be complemented by information from a lepton collider which can provide for precise examination of new phenomena. We describe the concept, accelerator design, and detector R&D for a high energy Muon Collider as well as the challenges associated with the machine and its detector environment.

Lipton, Ronald

2012-01-01T23:59:59.000Z

440

Electroweak Radiative Corrections to Muon Capture  

E-Print Network [OSTI]

Electroweak radiative corrections to muon capture on nuclei are computed and found to be sizable. They enhance the capture rates for hydrogen and helium by 2.8% and 3.0% respectively. As a result, the value of the induced pseudoscalar coupling, g_P^exp, extracted from a recent hydrogen 1S singlet capture experiment is increased by about 21% to g_P^exp = 7.3 +/- 1.2 and brought into good agreement with the prediction of chiral perturbation theory, g_P^theory=8.2 +/- 0.2. Implications for helium capture rate predictions are also discussed.

A. Czarnecki; W. J. Marciano; A. Sirlin

2007-04-30T23:59:59.000Z

Note: This page contains sample records for the topic "muon solenoid cms" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

ATLAS and CMS hints for a mirror Higgs boson  

E-Print Network [OSTI]

ATLAS and CMS have provided hints for the existence of a Higgs-like particle with mass of about 144 GeV with production cross section into standard decay channels which is about 50% that of the standard model Higgs boson. We show that this 50% suppression is exactly what the mirror matter model predicts when the two scalar mass eigenstates, each required to be maximal admixtures of a standard and mirror-Higgs boson, are separated in mass by more than their decay widths but less than the experimental resolution. We discuss prospects for the future confirmation of this interesting hint for non-standard Higgs physics.

Robert Foot; Archil Kobakhidze; Raymond R. Volkas

2011-11-10T23:59:59.000Z

442

ATLAS and CMS hints for a mirror Higgs boson  

Science Journals Connector (OSTI)

ATLAS and CMS have provided hints for the existence of a Higgs-like particle with mass of about 144 GeV with production cross section into standard decay channels which is about 50% that of the standard model Higgs boson. We show that this 50% suppression is exactly what the mirror matter model predicts when the two scalar mass eigenstates, each required to be maximal admixtures of a standard and mirror-Higgs boson, are separated in mass by more than their decay widths but less than the experimental resolution. We discuss prospects for the future confirmation of this interesting hint for nonstandard Higgs physics.

Robert Foot; Archil Kobakhidze; Raymond R. Volkas

2011-11-28T23:59:59.000Z

443

Top Quark Studies with the first CMS Data  

E-Print Network [OSTI]

Studies are presented of the selection of events consistent with top quark pair production in data recorded by the CMS detector at the LHC, corresponding to an integrated luminosity of 0.84+/-0.09 1/pb and at center-of-mass energy sqrt{s}=7 TeV. Results are presented for the lepton+jets as well as dilepton channels. Event yields in data are compared to those in simulation, and several background processes are estimated using data-driven techniques. The observed yields of top-antitop candidate events are roughly consistent with the Standard Model.

Frank-Peter Schilling

2010-10-12T23:59:59.000Z

444

Measurement of the K ? /K ? ratio for muon alpha sticking X-rays in muon catalyzed d-t fusion at the RIKEN-RAL Muon Facility  

Science Journals Connector (OSTI)

At the RIKEN-RAL Muon Facility, ?- to ? sticking K ? X-rays were observed for the first time taking advantage of the pulsed beam structure. The precision of the...

S.N. Nakamura; K. Nagamine; T. Matsuzaki; K. Ishida; N. Kawamura…

445

Solenoid-free Plasma Start-up in NSTX using Transient CHI  

SciTech Connect (OSTI)

Experiments in NSTX have now demonstrated the coupling of toroidal plasmas produced by the technique of Coaxial Helicity Injection (CHI) to inductive sustainment and ramp-up of the toroidal plasma current. In these discharges, the central Ohmic transformer was used to apply an inductive loop voltage to discharges with a toroidal current of about 100 kA created by CHI. The coupled discharges have ramped up to >700 kA and transitioned into an H-mode demonstrating compatibility of this startup method with conventional operation. The electron temperature in the coupled discharges reached over 800 eV and the resulting plasma had low inductance, which is preferred for long-pulse high performance discharges. These results from NSTX in combination with the previously obtained record 160 kA non-inductively-generated startup currents in an ST or tokamak in NSTX demonstrate that CHI is a viable solenoid-free plasma startup method for future STs and tokamaks.

Raman, R; Jarboe, T; Nelson, B; Mueller, D; Soukhanovskii, V A

2009-01-05T23:59:59.000Z

446

Theoretical Analysis of the Preload Force for a Tokamak Central Solenoid Coil Structure  

SciTech Connect (OSTI)

A simple one-dimensional analytic formulation is developed for approximate determination of the preload force that must be applied by tie-rods and/or tie-plates for a multimodule central solenoid coil assembly in tokamak devices. The primary purpose of the preload is to ensure that vertical tensile stress does not develop between any two adjacent module coils within the assembly. The absence of the tensile force is a minimal requirement needed to prevent lateral movements of the coils, when friction is the sole means available. An excessive preload, on the other hand, can damage insulation and conductor jackets. The analysis is based on a model system in which the vertical motion of the coil winding is described through representation of the coil conductors and tie-rods/-plates with linear springs. The coupled spring system is represented by a system of simultaneous linear equations, which is solved analytically to obtain the compression force at each spring in terms of the applied preload, electromagnetic forces on the springs, and spring constants. Although this procedure lacks the rigor of complex two- or three-dimensional analyses, it is expected to be able to play some useful role.

You, Kwang-Il; Lee, Deok Kyo [Korea Basic Science Institute (Korea, Republic of)

2003-06-15T23:59:59.000Z

447

A White Paper on SoLID (Solenoidal Large Intensity Device)  

E-Print Network [OSTI]

In order to fully exploit the physics potential of Jefferson Lab after 12 GeV energy upgrade, a new Solenoidal Large Acceptance Device (SoLID) is proposed. The SoLID spectrometer, with its unique capability of large acceptance and high luminosity, is ideal for precision measurements in semi-inclusive DIS to study transverse spin and transverse-momentum-dependent parton distributions of the nucleon, and for parity-violating Deep Inelastic Scattering (DIS) to perform precision tests of the Standard Model at low energy as well as addressing specific issues in nucleon structure including charge symmetry violation, d/u ratio and higher-twist effects due to di-quark. SoLID is also essential for precision measurements of J/\\psi electroproduction in the threshold region to study non-perturbative gluon dynamics and interaction. Five highly rated SoLID experiments and two "run group" experiments have been approved by the JLab Physics Advisory Committee. The physics program is presented along with an overview of the SoLID instrumentation and its current status.

J. P. Chen; H. Gao; T. K. Hemmick; Z. -E. Meziani; P. A. Souder; the SoLID Collaboration

2014-09-26T23:59:59.000Z

448

Joint ATLAS/CMS SLHC Opto WG 1 March 4, 2010  

E-Print Network [OSTI]

arrays are identified as most promising: 10 Gb/s AOC VCSEL array irradiate 6 AOC arrays in 2009 ATLAS/CMS SLHC Opto WG 4 AOC 10 Gb/s VCSEL w/o long twisted/ coiled fiber Reasonable optical power (ULM) for irradiation in summer 2010 #12;Joint ATLAS/CMS SLHC Opto WG 15 Summary AOC VCSEL arrays

Gan, K. K.

449

CMS Preprocessing Subsystem user`s guide. Software version 1.2  

SciTech Connect (OSTI)

The Common Mapping Standard (CMS) Data Production System (CDPS) produces and distributes CMS data in compliance with the Common Mapping Standard Interface Control Document, Revision 2.2. Historically, tactical mission planning systems have been the primary clients of CMS data. CDPS is composed of two subsystems, the CMS Preprocessing Subsystem (CPS) and the CMS Distribution Subsystem (CDS). This guide describes the operation of CPS, which is responsible for the management of source data and the production of CMS data from source data. The CPS system was developed for use on a workstation running Ultrix 4.2, and X Window System Version X11R4, and Motif Version 1.1. This subsystem is organized into four major functional groups: CPS Executive; Manage Source Data; Manage CMS Data Preprocessing; and CPS System Utilities. CPS supports the production of CMS data from the following source chart, image, and elevation data products: Global Navigation Chart; Jet Navigation Chart; Operational Navigation Chart; Tactical Pilotage Chart; Joint Operations Graphics-Air; Topographic Line Map; ARC Digital Raster Imagery; Digital Terrain Elevation Data (Level 1); and Low Flying Chart.

Didier, B.T.; Gash, J.D.; Greitzer, F.L.; Havre, S.L.; Ramsdell, J.V.; Turney, C.R.

1993-10-01T23:59:59.000Z

450

Final Technical Report Ã?¢Ã?Â?Ã?Â? CMS FAST OPTICAL CALORIMETRY  

SciTech Connect (OSTI)

This is the final report of CMS FAST OPTICAL CALORIMETRY, a grant to Fairfield University for development, construction, installation and operation of the forward calorimeter on CMS, and for upgrades of the forward and endcap calorimeters for higher luminosity and radiation damage amelioration.

David R Winn

2012-07-12T23:59:59.000Z

451

Electromagnetic Interactions of High-Energy Muons  

Science Journals Connector (OSTI)

The production of knock-on electrons and of electron pairs by muons of mean energy >50 BeV has been measured from cloud-chamber photographs of soft showers produced in lead plates. The cloud chamber was operated at a depth of 8.42×104 g/cm2 underground. About half the data were taken while the cloud chamber was tilted 66° in order to favor observation of the high-average-energy muons that come in at large zenith angle. The energies of the electrons that initiated the showers was obtained from an experimental calibration (to be published). The shower energies that were studied extended from 85 MeV to about 104 MeV. The observed frequency is compared with the expected frequency calculated from the results of Bhabha for knock-on electrons and those of Zapolski and of Murota, Ueda, and Tanaka for electron pairs. The agreement is satisfactory except for knock-on electrons in the region of 109 eV, where the predicted frequency appears to be significantly lower than the observed frequency.

P. D. Kearney and W. E. Hazen

1965-04-12T23:59:59.000Z

452

COSMIC-RAY MUON TOMOGRAPHY AND ITS APPLICATION TO THE DETECTION OF HIGH-Z MATERIALS  

E-Print Network [OSTI]

. The mean energy of the muons at the ground is about 4 GeV. The integral 1 #12;intensity of vertical muons change their directions due to the multiple scattering, lose their energy and finally get stopped. A muonCOSMIC-RAY MUON TOMOGRAPHY AND ITS APPLICATION TO THE DETECTION OF HIGH-Z MATERIALS Konstantin

Kurien, Susan

453

A Possible Mechanism of Direct Production of Muon Pairs at High Energies  

Science Journals Connector (OSTI)

......significant fraction of cosmic ray muons with energies greater than several TeVis produced...separation much greater than twice the muon rest energy, the probability of muon pair...meson produc- tion by very high energy muons.7) It should be noted that......

Satio Hayakawa; Ken Kikuchi

1969-02-01T23:59:59.000Z

454

Muon (g – 2): Renormalization at Work, All the Way Down to the Weak Scale  

Science Journals Connector (OSTI)

......sufficient proton-beam energy made it possible...pions, and thus muons, in the laboratory...the maximum allowed energy in the muon rest frame, Emax...decay, the highest-energy positrons are emitted parallel to the muon spin in the muon......

B. Lee Roberts

2007-05-01T23:59:59.000Z

455

High Energy Gamma-Rays in the Atmosphere and Muons Underground and Underwater  

Science Journals Connector (OSTI)

......production rate of the E-component. 2 2. Muons The energy spectrum of muons below 100 GeV has been measured directly by means...However, the size of the burst produced by a muon of given energy fluctuates so much that the muon spectrum can......

Satio Hayakawa; Jun Nishimura; Yoshiaki Yamamoto

1964-04-01T23:59:59.000Z

456

RADIOGRAPHIC IMAGING BELOW A VOLCANIC CRATER FLOOR WITH COSMIC-RAY MUONS  

E-Print Network [OSTI]

horizontally-arriving cosmic ray muon with energy of 1 TeV can penetrate 2.6 km of water. Thus, cosmic-ray muon that uncertainty on the shape and amplitude of the energy spectrum of the muon source is within a few percentRADIOGRAPHIC IMAGING BELOW A VOLCANIC CRATER FLOOR WITH COSMIC-RAY MUONS HIROYUKI K.M. TANAKA

Aoki, Yosuke

457

Studies of Muon-Induced Radioactivity at NuMIRadioactivity at NuMI  

E-Print Network [OSTI]

Studies of Muon-Induced Radioactivity at NuMIRadioactivity at NuMI David Boehnlein Fermi National JASMIN Experiment · JASMIN ­ Japanese & American Study of Muon Interactions and Neutron DetectionMuonMIprogress to study activation at the NuMI muon alcoves. July 24, 2009 NuFact09 - David Boehnlein 3NuFact09 - David

McDonald, Kirk

458

The MUON System in the HERA-B Experiment ITEP, B. Cheremushkinskaya,25 Moscow 117259, Russia  

E-Print Network [OSTI]

The MUON System in the HERA-B Experiment M.Titov 1 ITEP, B. Cheremushkinskaya,25 Moscow 117259, Russia Representing the HERA-B Muon collaboration Abstract The HERA-B experiment is designed to study CP with an internal target. The muon system serves to identify muons with momenta greater than 5 GeV/c. Unambiguous

459

E-Print Network 3.0 - atlas muon chambers Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

chambers Search Powered by Explorit Topic List Advanced Search Sample search results for: atlas muon chambers...

460

Muon Simulations for Super-Kamiokande, KamLAND and CHOOZ  

E-Print Network [OSTI]

Muon backgrounds at Super-Kamiokande, KamLAND and CHOOZ are calculated using MUSIC. A modified version of the Gaisser sea level muon distribution and a well-tested Monte Carlo integration method are introduced. Average muon energy, flux and rate are tabulated. Plots of average energy and angular distributions are given. Implications on muon tracker design for future experiments are discussed.

Alfred Tang; Glenn Horton-Smith; Vitaly A. Kudryavtsev; Alessandra Tonazzo

2006-04-07T23:59:59.000Z

Note: This page contains sample records for the topic "muon solenoid cms" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

E-Print Network 3.0 - atmospheric muon neutrino Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

neutrino Search Powered by Explorit Topic List Advanced Search Sample search results for: atmospheric muon neutrino...

462

E-Print Network 3.0 - atlas muon chamber Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

chamber Search Powered by Explorit Topic List Advanced Search Sample search results for: atlas muon chamber...

463

E-Print Network 3.0 - atmospheric muon neutrinos Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

neutrinos Search Powered by Explorit Topic List Advanced Search Sample search results for: atmospheric muon neutrinos...

464

Muon Detector stacking order performance comparison Richard Lee and Deborah Robinson  

E-Print Network [OSTI]

Muon Detector stacking order performance comparison Richard Lee and Deborah Robinson 08/02/2012 Abstract Four muon detectors have been studied. Detectors were stacked in varying orders top to bottom of the particles in cosmic radiation is the muon. Muons can be detected using a scintillator plastic block

California at Santa Cruz, University of

465

Accelerator Physics of a Muon Collider Kirk T. McDonald  

E-Print Network [OSTI]

.edu October 20, 1998 Seminar at the Princeton Plasma Physics Laboratory Muon Collider main page: http(Some) Accelerator Physics of a Muon Collider Kirk T. McDonald Princeton U. mcdonald@puphep.princeton.html Princeton Muon Collider page: http://puhep1.princeton.edu/mumu/ 1 #12; What is a Muon Collider

McDonald, Kirk

466

Accelerator Physics of a Muon Collider Kirk T. McDonald  

E-Print Network [OSTI]

.edu October 20, 1998 Seminar at the Princeton Plasma Physics Laboratory Muon Collider main page: http(Some) Accelerator Physics of a Muon Collider Kirk T. McDonald Princeton U. mcdonald@puphep.princeton.html Princeton Muon Collider page: http://puhep1.princeton.edu/mumu/ 1 #12;What is a Muon Collider

McDonald, Kirk

467

Detector and Event Visualization with SketchUp at the CMS Experiment  

E-Print Network [OSTI]

We have created 3D models of the CMS detector and particle collision events in SketchUp, a 3D modelling program. SketchUp provides a Ruby API which we use to interface with the CMS Detector Description to create 3D models of the CMS detector. With the Ruby API, we also have created an interface to the JSON-based event format used for the iSpy event display to create 3D models of CMS events. These models have many applications related to 3D representation of the CMS detector and events. Figures produced based on these models were used in conference presentations, journal publications, technical design reports for the detector upgrades, art projects, outreach programs, and other presentations.

Tai Sakuma; Thomas McCauley

2013-11-20T23:59:59.000Z

468

CMS Distribution Subsystem User`s Guide. Software: Version 1.2  

SciTech Connect (OSTI)

Historically, tactical mission planning systems have been the primary clients of CMS data. CDPS is composed of two subsystems, the CMS Preprocessing Subsystem (CPS) and the CMS Distribution Subsystem (CDS). This guide describes the operation of CDS. References and other resources used for the preparation of this guide are listed. CDS is responsible for the management of archived CMS data, the management of production orders and the generation of theater databases. The CDS system was developed for use on a workstation running Ultrix 4.2, the X Window System Version X11R4, and Motif Version 1.1. CDS is organized into seven major functional groups: CDS Executive, Manage Processed Data, Display CMS Data, Manage Production Orders, Build Theater Databases, Administration Tools, and System Utilities.

Gash, J.D.; Greitzer, F.L.; Hatfield, L.D.; Portwood, M.H.; Turney, C.R.

1993-10-01T23:59:59.000Z

469

Fredericton, New Brunswick, 5 June 2010 CMS Summer Meeting slide 1 Modular Invariant Theory of the Cyclic Group  

E-Print Network [OSTI]

Fredericton, New Brunswick, 5 June 2010 CMS Summer Meeting ­ slide 1 Modular Invariant Theory Some Consequences Fredericton, New Brunswick, 5 June 2010 CMS Summer Meeting ­ slide 2 Modular 2010 CMS Summer Meeting ­ slide 3 #12;The Modular Group of Prime Order Modular Representation Theory

Wehlau, David

470

Towards a compensatable Muon Collider calorimeter with manageable backgrounds  

SciTech Connect (OSTI)

Muon Collider detectors pose very challenging problems in detector technology due to extremely large backgrounds present in the detector volume as a result of muon decays. Current designs of a 750 GeV/c per beam Muon Collider envisage 4.28 x 10{sup 5} muon decays per meter in the beam pipe close to the interaction region. The decay electrons after intense shielding still manage to produce large backgrounds in the detector volume of low energy photons, neutrons and higher energy Bethe Heitler muons. There are 170/184/6.8/177 TeVs energy entering the detector volume per crossing due to EM particles/Muons/Mesons/Baryons respectively. We investigate the capabilities of an iron calorimeter with pixelated readout where each pixel gives a yes/no answer as to whether a charged particle passed through it or not, to solve this problem. Each pixel is individually triggered by a 'travelling gate trigger' with a gate of 2 ns where the beginning of the gate is the time of arrival of a light signal from the interaction region to the pixel. We show that such a calorimeter is compensatable and propose two schemes to compensate the digital output in software to improve the resolution of the calorimeter. We show that such a calorimeter is capable of digitizing physics signals from the interaction region and as a result, the backgrounds from the muon decays are much reduced and under control.

Raja, R.; /Fermilab

2012-04-01T23:59:59.000Z

471

Muon Spin Relaxation Study of Spinel Lithium Manganese Oxides  

Science Journals Connector (OSTI)

Muons can be implanted into any material, and the direction of the muon spin at the instant of decay (?+ ? e+ + ?e + ???, lifetime = 2.179 ?s) provides information on the dynamics of the muon during its lifetime and on the static and fluctuating magnetic fields from neighboring nuclear and atomic moments. ... On the other hand, the shape of the H+-MnO2 spectrum at 100 K shows two Gaussian components, which indicates the existence of at least two different depolarization rates that can be due to muons at two different muon sites. ... Therefore, these results indicate that the temperature for onset of Li+ ion diffusion decreases with an increase in the amount of lithium in the spinel manganese oxide, which is not incompatible with a higher Li+ diffusion coefficient on LiMn2O4 than on Li1.33Mn1.67O4 found from NMR experiments,21 since NMR data will average over all Li nuclei whereas muons only interact with those Li nearest to the muon. ...

María J. Ariza; Deborah J. Jones; Jacques Rozière; James S. Lord; Didier Ravot

2003-05-28T23:59:59.000Z

472

Polarized Muon Decay at Rest with V+A Interaction  

E-Print Network [OSTI]

In this paper, we analyze the polarized muon decay at rest (PMDaR) and elastic neutrino-electron scattering (ENES) admitting the non-standard V+A interaction in addition to standard V-A interaction. Considerations are made for Dirac massive muon neutrino and electron antineutrino. Moreover, muon neutrinos are transversely polarized. It means that the outgoing muon-neutrino beam is a mixture of the left- and right-chirality muon neutrinos and has a fixed direction of transverse spin polarization with respect to production plane. We show that the angle-energy distribution of muon neutrinos contains the interference terms between the standard V-A and exotic V+A couplings, which are proportional to the transverse components of muon neutrino spin polarization. They do not vanish in a limit of massless neutrino and include the relative phases to test the CP violation. In consequence, it allows to calculate a neutrino flux and an expected event number in the ENES (detection process) both for the standard model prediction and the case of neutrino left-right mixture.

W. Sobków; S. Ciechanowicz; M. Misiaszek

2011-02-07T23:59:59.000Z

473

Novel Muon Beam Facilities for Project X at Fermilab  

SciTech Connect (OSTI)

Innovative muon beam concepts for intensity-frontier experiments such as muon-to-electron conversion are described. Elaborating upon a previous single-beam idea, we have developed a design concept for a system to generate four high quality, low-energy muon beams (two of each sign) from a single beam of protons. As a first step, the production of pions by 1 and 3 GeV protons from the proposed Project X linac at Fermilab is being simulated and compared with the 8-GeV results from the previous study.

Neuffer, D.V.; /Fermilab; Ankenbrandt, C.M.; Abrams, R.; Roberts, T.J.; Yoshikawa, C.Y.; /MUONS Inc., Batavia

2012-05-01T23:59:59.000Z

474

Laboratory tests of Lorentz and CPT symmetry with muons  

Science Journals Connector (OSTI)

The prospects are explored for testing Lorentz and CPT symmetry in the muon sector via the spectroscopy of muonium and various muonic atoms, and via measurements of the anomalous magnetic moments of the muon and antimuon. The effects of Lorentz-violating operators of both renormalizable and nonrenormalizable dimensions are included. We derive observable signals, extract first constraints from existing data on a variety of coefficients for Lorentz and CPT violation, and estimate sensitivities attainable in forthcoming experiments. The potential of Lorentz violation to resolve the proton radius puzzle and the muon anomaly discrepancy is discussed.

André H. Gomes; V. Alan Kostelecký; Arnaldo J. Vargas

2014-10-21T23:59:59.000Z

475

FFAG LATTICE FOR MUON ACCELERATION WITH DISTRIBUTED RF.  

SciTech Connect (OSTI)

A future muon collider or neutrino factory requires fast acceleration to minimize muon decay. We have previously described an FFAG ring that accelerated muons from 10 to 20 GeV in energy. The ring achieved its large momentum acceptance using a low-emittance lattice with a small dispersion. In this paper, we present an update on that ring. We have used design tools that more accurately represent the ring's behavior at large momentum offsets. We have also improved the dynamic aperture from the earlier design.

COURANT,E.D..TRBOJEVIC,D.BERG,S.J.BLASKIEWICZ,M.COURANT,E.D..TRBOJEVIC,D.BERG,S.J.BLASKIEWICZ,M.M.PALMER,R.GARREN,A.

2003-05-12T23:59:59.000Z

476

Muon catalyzed fusion and muon to 3He transfer in solid T2 studied by X-ray and neutron detection  

Science Journals Connector (OSTI)

X-ray and neutron measurements were carried out for muon catalyzed fusion and related phenomena in solid...2. The X-ray originated from the ?- to ? sticking in muon catalyzed fusion; t + t + ? - ...

T. Matsuzaki; K. Nagamine; K. Ishida; S.N. Nakamura; N. Kawamura…

477

Particle Physics at Discovery's Horizon  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

uslhc.us uslhc.us Particle Physics at Discovery's Horizon September 2012 Discoveries from the Compact Muon Solenoid experiment at the Large Hadron Collider at CERN in Geneva, Switzerland, promise to rev- olutionize our understanding of the universe. With more than 1000 participants from 49 institutions across the country, US CMS is the largest national group in the 3,600-member international CMS collaboration. Supported by the US Department of Energy's Office of Science and the National Science Foundation, the US CMS collaboration consists of more than 430 physicists, nearly 200 graduate students and more than 300 engineers, tech- nicians and computer scientists. The US CMS collaboration plays a vital role in the operation of the CMS detector and analysis of data from LHC collisions. US groups

478

Ordinary Muon Capture in Hydrogen Reexamined  

E-Print Network [OSTI]

The rate of muon capture in a muonic hydrogen atom is calculated in heavy-nucleon chiral perturbation theory up to next-to-next-to leading order. To this order, we present the systematic evaluation of all the corrections due to the QED and electroweak radiative corrections and the proton-size effect. Since the low-energy constants involved can be determined from other independent sources of information, the theory has predictive power. For the hyperfine-singlet $\\mu p$ capture rate $\\Gamma_0$, our calculation gives $\\Gamma_0=710 \\,\\pm 5\\,s^{-1}$, which is in excellent agreement with the experimental value obtained in a recent high-precision measurement by the MuCap Collaboration.

U. Raha; F. Myhrer; K. Kubodera

2013-06-03T23:59:59.000Z

479

Muon g-2: a mini review  

E-Print Network [OSTI]

The current status of the experimental measurements and theoretical predictions of the anomalous magnetic moment of the muon $a_\\mu$ is briefly reviewed. The emphasis is put on the evaluation of the hadronic contribution to $a_\\mu$ as it has the largest uncertainty among all Standard Model contributions. The precision of the hadronic contribution is driven by the input e+e- data predominantly from the \\pi+pi- channel. Including the latest experimental data on e+e- annihilation into hadronsfrom CMD2 and SND for the \\pi+\\pi- channel and BaBar for multihadron final states, the updated Standard Model prediction disagrees with the measurement dominated by BNL by 3.3 standard deviations, with the theoretical precision exceeding the experimental one.

Zhiqing Zhang

2008-01-31T23:59:59.000Z

480

First direct observation of muon antineutrino disappearance  

DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

This letter reports the first direct observation of muon antineutrino disappearance. The MINOS experiment has taken data with an accelerator beam optimized for ??? production, accumulating an exposure of 1.71 x 1020 protons on target. In the Far Detector, 97 charged current ??? events are observed. The no-oscillation hypothesis predicts 156 events and is excluded at 6.3?. The best fit to oscillation yields |?m?2| = (3.36-0.40 +0.46(stat.) ± 0.06(syst.)) x 10-3 eV2, sin2(2 ??) = 0.86-0.12+0.11 (stat.) ± 0.01(syst.). The MINOS ?? and ??? measurements are consistent at the 2.0% confidence level, assuming identical underlying oscillation parameters.

Adamson, P [Fermilab; Andreopoulos, C [Rutherford; Auty, D J [Sussex U.; Ayres, D S [Argonne; Backhouse, C [Oxford U.; Barr, G [Oxford U.; Bishai, M [Brookhaven; Blake, A [Cambridge U.; Bock, G J [Fermilab; Boehnlein, D J [/Fermilab; Bogert, D [Fermilab; Harvard U., Phys. Dept.

2011-07-05T23:59:59.000Z

Note: This page contains sample records for the topic "muon solenoid cms" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

Magnetic Moment of the Free Muon  

Science Journals Connector (OSTI)

The magnetic moment of the positive ? meson has been measured in several target materials by a magnetic resonance technique. Muons were brought to rest with their spins parallel to a magnetic field. A radio-frequency pulse was applied to effect a spin reorientation which was detected by counting the decay electrons emerging after the pulse in a fixed direction. Results are expressed in terms of a g factor which for a spin 1/2 particle is the ratio of the actual moment to e?2m?c. The most accurate result obtained in a CHBr3 target, is that g=2(1.0026±0.0009) compared to the theoretical prediction of g=2(1.0012). Less accurate measurements yielded g=2.005±0.005 in a copper target and g=2.00±0.01 in a lead target.

T. Coffin; R. L. Garwin; S. Penman; L. M. Lederman; A. M. Sachs

1958-02-01T23:59:59.000Z

482

Measurements of $t\\bar{t}$ spin correlations in CMS  

E-Print Network [OSTI]

We present an overview of the measurements of $t\\bar{t}$ spin correlations in the CMS Collaboration. We present two analyses both in the dilepton channel using proton-proton collisions at $\\sqrt{s}\\, =\\, 7$ TeV based on an integrated luminosity of 5.0 fb$^{-1}$. The spin correlations and polarization are measured using angular asymmetries. The results are consistent with unpolarized top quarks and Standard Model spin correlation. The second analysis sets a limit on the real part of the top-quark chromo-magnetic dipole moment of $-0.043\\, <\\, Re({\\hat{\\mu}}_{t})\\, <\\, 0.117$ at $95\\,%$ confidence level through the measured azimuthal angle difference between the two charged leptons from $t\\bar{t}$ production.

Kelly Beernaert

2014-11-26T23:59:59.000Z

483

Melvin Schwartz and the Discovery of the Muon Neutrino  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Melvin Schwartz and the Discovery of the Muon Neutrino Melvin Schwartz and the Discovery of the Muon Neutrino Resources with Additional Information Melvin Schwartz Courtesy Brookhaven National Laboratory Melvin Schwartz was the co-winner of the 1988 Nobel Prize in Physics "for the neutrino beam method and the demonstration of the doublet structure of the leptons through the discovery of the muon neutrino". 'In 1962, Schwartz, with Leon Lederman and Jack Steinberger ... discovered the muon neutrino at the Alternating Gradient Synchrotron (AGS), the then brand-new accelerator at the U.S. Department of Energy's Brookhaven National Laboratory. ... First coming to Brookhaven in 1955, Schwartz performed his Ph.D. thesis research through 1956 at the Laboratory's first accelerator, the Cosmotron. While finishing his thesis, he was employed by the Laboratory from 1956-58.

484

The cosmic ray muon energy spectum via ?erenkov radiation  

E-Print Network [OSTI]

In this thesis, I designed and constructed a basic Cerenkov detector to measure the energy spectrum of cosmic ray muons for use in the graduate experimental physics courses, 8.811/2. The apparatus consists of a light-tight ...

Quintero, Eric Antonio

2010-01-01T23:59:59.000Z

485

Range-energy relation for ultra-relativistic muons  

Science Journals Connector (OSTI)

A range-energy relation for ultra-relativistic muons is calculated: 1) extending the calculation...4...GeV; 2) emploing the Murota-Ueda-Tanaka theory, for the pair production energy loss; 3) utilizing for the nuc...

C. Castagnoli; A. De Maeco; R. Scrimaglio

1964-01-01T23:59:59.000Z

486

Radiative energy loss of muons in the MINOS Far Detector.  

E-Print Network [OSTI]

??Higher energy (>100GeV)muons lose their energy preferentially through radiativemethods such as Bremsstrahlung, Pair-production and Photo-production. Because the radiative loss of the energy is a stochastic… (more)

Bhattarai, Prabhat

2010-01-01T23:59:59.000Z

487

On the energy range relation for fast muons in rock  

Science Journals Connector (OSTI)

A discussion is given of the best estimate of various types of energy loss; the energy-range relation for muons in rock and water is then evaluated....?6 g?1 cm2 fractional «nuclear» energy losses respectively; w...

M. Mandò; L. Ronchi

1952-01-01T23:59:59.000Z

488

Muons of very and ultra-high energy cosmic rays  

Science Journals Connector (OSTI)

In many cosmic rays experiments at very and ultra-high energies, an excess of muons (including those of very high energy, >100 TeV) is observed that cannot ... compositions, and especially the observed excesses o...

A. G. Bogdanov; R. P. Kokoulin…

2013-11-01T23:59:59.000Z

489

Muon Inelasticity in High-Energy Neutrino Interaction  

Science Journals Connector (OSTI)

......Copyright (c) 1972 Progress of Theoretical Physics December 1972 research-article Letters to the Editor Muon Inelasticity in High-Energy Neutrino Interaction Yoshitaka Okumura Research Institute for Fundamental Physics, Kyoto University, Kyoto......

Yoshitaka Okumura

1972-12-01T23:59:59.000Z

490

Multiple-pion production by high-energy muons  

Science Journals Connector (OSTI)

By the use of two cloud chambers containing lead plates and iron plates, we observed 133 events of the penetrating showers produced by muons in the energy range from about 10 GeV to a ... . The behaviours of the ...

S. Higashi; T. Kitamura; Y. Mishima; S. Miyamoto; Y. Watase…

1965-01-01T23:59:59.000Z

491

Change of energy profiles for muons upon lattice relaxation  

Science Journals Connector (OSTI)

Systematic calculations of potentials for muons and protons in various simple metals have...?SR are discussed. The modification of the energy profiles with lattice relaxation is studied in...

S. Estreicher; P. F. Meier

1984-01-01T23:59:59.000Z

492

Standard Model Prediction of the Muon Anomalous Magnetic Moment  

E-Print Network [OSTI]

I review the present Standard Model prediction of the muon anomalous magnetic moment. The discrepancy with its experimental determination is (25.5 +- 8.0) x 10^-10, i.e., 3.2 standard deviations.

Joaquim Prades

2010-02-18T23:59:59.000Z

493

Muon diagnostics of the Earth’s atmosphere and magnetosphere  

Science Journals Connector (OSTI)

A method of distant monitoring of the Earth’s magnetosphere and atmosphere is described, which is based on the close correlation between the modulations in the flux of atmospheric muons detected at the Earth’s su...

N. S. Barbashina; V. V. Borog…

2007-07-01T23:59:59.000Z

494

Automatic measurement of the mean lifetime of the muon  

Science Journals Connector (OSTI)

This paper describes a microcomputer?based apparatus for the measurement of the mean lifetime of the muon. The equipment exposes the student to many modern experimental techniques and is suitable for an advanced undergraduatephysics laboratory.

Roger J. Lewis

1982-01-01T23:59:59.000Z

495

Fermilab Muon Ring Arrives to a Large Crowd of Fans  

SciTech Connect (OSTI)

A very large group of people gathered to watch the muon g-2 ring on its last leg of the big move from Brookhaven National Laboratory in Long Island, NY to Fermilab in Batavia, IL.

None

2013-08-15T23:59:59.000Z

496

Muon Physics: A Pillar of the Standard Model  

E-Print Network [OSTI]

Since its discovery in the 1930s, the muon has played an important role in our quest to understand the sub-atomic theory of matter. The muon was the first second-generation standard-model particle to be discovered, and its decay has provided information on the (Vector -Axial Vector) structure of the weak interaction, the strength of the weak interaction, G_F, and the conservation of lepton number (flavor) in muon decay. The muon's anomalous magnetic moment has played an important role in restricting theories of physics beyond the standard standard model, where at present there is a 3.4 standard-deviation difference between the experiment and standard-model theory. Its capture on the atomic nucleus has provided valuable information on the modification of the weak current by the strong interaction which is complementary to that obtained from nuclear beta decay.

B. Lee Roberts

2007-04-18T23:59:59.000Z

497

Fermilab | Newsroom | Press Releases | May 8, 2013: Muon g-2...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Muon g-2 Experiment Images and Videos Click on links below images for medium and high-resolution jpeg images. When using these images, please credit each photo as indicated. Press...

498

The muon anomalous magnetic moment, a view from the lattice  

E-Print Network [OSTI]

We review some of the issues that arise in attempts to compute the hadronic corrections to the muon anomalous magnetic moment using Lattice QCD. We concentrate on the dominant contribution, which requires an accurate evaluation of the hadronic vacuum polarization.

Christopher Aubin; Thomas Blum; Maarten Golterman; Kim Maltman; Santiago Peris

2013-11-21T23:59:59.000Z

499

(ATLAS Muon TDC version 1 & 2) User's Manual  

E-Print Network [OSTI]

1 AMT-1 & 2 (ATLAS Muon TDC version 1 & 2) User's Manual Yasuo Arai KEK, National High Energy Accelerator Research Organization 1-1 Oho, Tsukuba, Ibaraki 305, Japan yasuo.arai@kek.jp, http://atlas

van Suijlekom, Walter

500

A VERY FAST RAMPING MUON SYNCHROTRON FOR A NEUTRINO FACTORY.  

SciTech Connect (OSTI)

A 4600 Hz fast ramping synchrotron is studied as an economical way of accelerating muons from 4 to 20 GeV/c for a neutrino factory. Eddy current losses are minimized by the low machine duty cycle plus thin grain oriented silicon steel laminations and thin copper wires. Combined function magnets with high gradients alternating within single magnets form the lattice. Muon survival is 83%.

SUMMERS,D.J.BERG,J.S.PALMER,R.B.GARREN,A.A.

2003-05-12T23:59:59.000Z