Pressurized rf cavities in ionizing beams

Freemire, B.; Tollestrup, A. V.; Yonehara, K.; Chung, M.; Torun, Y.; Johnson, R. P.; Flanagan, G.; Hanlet, P. M.; Collura, M. G.; Jana, M. R.; Leonova, M.; Moretti, A.; Schwarz, T.

doi:10.1103/PhysRevAccelBeams.19.062004

Title: Pressurized rf cavities in ionizing beams

Abstract

A muon collider or Higgs factory requires significant reduction of the six dimensional emittance of the beam prior to acceleration. One method to accomplish this involves building a cooling channel using high pressure gas filled radio frequency cavities. The performance of such a cavity when subjected to an intense particle beam must be investigated before this technology can be validated. To this end, a high pressure gas filled radio frequency (rf) test cell was built and placed in a 400 MeV beam line from the Fermilab linac to study the plasma evolution and its effect on the cavity. Hydrogen, deuterium, helium and nitrogen gases were studied. Additionally, sulfur hexafluoride and dry air were used as dopants to aid in the removal of plasma electrons. Measurements were made using a variety of beam intensities, gas pressures, dopant concentrations, and cavity rf electric fields, both with and without a 3 T external solenoidal magnetic field. In conclusion, energy dissipation per electron-ion pair, electron-ion recombination rates, ion-ion recombination rates, and electron attachment times to SF$$_6$$ and O$$_2$$ were measured.

Authors:: Freemire, B.; Tollestrup, A. V.; Yonehara, K.; Chung, M.; Torun, Y.; Johnson, R. P.; Flanagan, G.; Hanlet, P. M.; Collura, M. G.; Jana, M. R.; Leonova, M.; Moretti, A.; Schwarz, T.

Publication Date:: Mon Jun 20 00:00:00 EDT 2016

Research Org.:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP)

OSTI Identifier:: 1258311

Alternate Identifier(s):: OSTI ID: 1287385

Report Number(s):: FERMILAB-PUB-16-297-AD-APC
Journal ID: ISSN 2469-9888; PRABFM; 062004

Grant/Contract Number:: AC02-07CH11359

Resource Type:: Published Article

Journal Name:: Physical Review Accelerators and Beams

Additional Journal Information:: Journal Name: Physical Review Accelerators and Beams Journal Volume: 19 Journal Issue: 6; Journal ID: ISSN 2469-9888

Publisher:: American Physical Society

Country of Publication:: United States

Language:: English

Subject:: 43 PARTICLE ACCELERATORS

Citation Formats


                    Freemire, B., Tollestrup, A. V., Yonehara, K., Chung, M., Torun, Y., Johnson, R. P., Flanagan, G., Hanlet, P. M., Collura, M. G., Jana, M. R., Leonova, M., Moretti, A., and Schwarz, T. Pressurized rf cavities in ionizing beams.  United States: N. p., 2016. 
Web.  doi:10.1103/PhysRevAccelBeams.19.062004.

Copy to clipboard


                    Freemire, B., Tollestrup, A. V., Yonehara, K., Chung, M., Torun, Y., Johnson, R. P., Flanagan, G., Hanlet, P. M., Collura, M. G., Jana, M. R., Leonova, M., Moretti, A., & Schwarz, T. Pressurized rf cavities in ionizing beams.  United States.  https://doi.org/10.1103/PhysRevAccelBeams.19.062004

Copy to clipboard


                    Freemire, B., Tollestrup, A. V., Yonehara, K., Chung, M., Torun, Y., Johnson, R. P., Flanagan, G., Hanlet, P. M., Collura, M. G., Jana, M. R., Leonova, M., Moretti, A., and Schwarz, T. Mon .  
"Pressurized rf cavities in ionizing beams".  United States.  https://doi.org/10.1103/PhysRevAccelBeams.19.062004.

Copy to clipboard


                    
@article{osti_1258311,

  title        = {Pressurized rf cavities in ionizing beams},

  author       = {Freemire, B. and Tollestrup, A. V. and Yonehara, K. and Chung, M. and Torun, Y. and Johnson, R. P. and Flanagan, G. and Hanlet, P. M. and Collura, M. G. and Jana, M. R. and Leonova, M. and Moretti, A. and Schwarz, T.},

  abstractNote = {A muon collider or Higgs factory requires significant reduction of the six dimensional emittance of the beam prior to acceleration. One method to accomplish this involves building a cooling channel using high pressure gas filled radio frequency cavities. The performance of such a cavity when subjected to an intense particle beam must be investigated before this technology can be validated. To this end, a high pressure gas filled radio frequency (rf) test cell was built and placed in a 400 MeV beam line from the Fermilab linac to study the plasma evolution and its effect on the cavity. Hydrogen, deuterium, helium and nitrogen gases were studied. Additionally, sulfur hexafluoride and dry air were used as dopants to aid in the removal of plasma electrons. Measurements were made using a variety of beam intensities, gas pressures, dopant concentrations, and cavity rf electric fields, both with and without a 3 T external solenoidal magnetic field. In conclusion, energy dissipation per electron-ion pair, electron-ion recombination rates, ion-ion recombination rates, and electron attachment times to SF$_6$ and O$_2$ were measured.},

  doi          = {10.1103/PhysRevAccelBeams.19.062004},

  journal      = {Physical Review Accelerators and Beams},

  number       = 6,

  volume       = 19,

  place        = {United States},

  year         = {Mon Jun 20 00:00:00 EDT 2016},

  month        = {Mon Jun 20 00:00:00 EDT 2016}

}

Copy to clipboard

Journal Article:

Free Publicly Available Full Text

Publisher's Version of Record
https://doi.org/10.1103/PhysRevAccelBeams.19.062004

Other availability

Search WorldCat to find libraries that may hold this journal

Citation Metrics:

Cited by: 6 works

Citation information provided by
Web of Science

Save / Share:

Export Metadata

Save to My Library

Works referenced in this record:

Dark current, breakdown, and magnetic field effects in a multicell, 805 MHz cavity
journal, July 2003

Norem, J.; Wu, V.; Moretti, A.
Physical Review Special Topics - Accelerators and Beams, Vol. 6, Issue 7
DOI: 10.1103/PhysRevSTAB.6.072001

Effects of high solenoidal magnetic fields on rf accelerating cavities
journal, July 2005

Moretti, A.; Qian, Z.; Norem, J.
Physical Review Special Topics - Accelerators and Beams, Vol. 8, Issue 7
DOI: 10.1103/PhysRevSTAB.8.072001

Triggers for RF breakdown
journal, February 2005

Norem, J.; Insepov, Z.; Konkashbaev, I.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 537, Issue 3
DOI: 10.1016/j.nima.2004.07.289

Effects of external magnetic fields on the operation of high-gradient accelerating structures
journal, August 2010

Stratakis, Diktys; Gallardo, Juan C.; Palmer, Robert B.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 620, Issue 2-3
DOI: 10.1016/j.nima.2010.03.167

Pressurized $H_{2}$ rf Cavities in Ionizing Beams and Magnetic Fields
journal, October 2013

Chung, M.; Collura, M. G.; Flanagan, G.
Physical Review Letters, Vol. 111, Issue 18
DOI: 10.1103/PhysRevLett.111.184802

Measurement of transmission efficiency for 400 MeV proton beam through collimator at Fermilab MuCool Test Area using Chromox-6 scintillation screen
journal, June 2013

Jana, M. R.; Chung, M.; Freemire, B.
Review of Scientific Instruments, Vol. 84, Issue 6
DOI: 10.1063/1.4808275

Ionization and excitation of hydrogen molecules by fast proton impact
journal, January 1996

Ben-Itzhak, I.; Krishnamurthi, Vidhya; Carnes, K. D.
Journal of Physics B: Atomic, Molecular and Optical Physics, Vol. 29, Issue 1
DOI: 10.1088/0953-4075/29/1/005

Cross Sections and Swarm Coefficients for H ⁺ , H ₂ ⁺ , H ₃ ⁺ , H, H ₂ , and H ⁻ in H ₂ for Energies from 0.1 eV to 10 keV
journal, May 1990

Phelps, A. V.
Journal of Physical and Chemical Reference Data, Vol. 19, Issue 3
DOI: 10.1063/1.555858

On the dynamics of the reaction of positive hydrogen cluster ions (H5+ to H23+) with para and normal hydrogen at 10 K
journal, November 1995

Paul, W.; Lücke, B.; Schlemmer, S.
International Journal of Mass Spectrometry and Ion Processes, Vol. 149-150
DOI: 10.1016/0168-1176(95)04269-Q

Gas Discharge Physics
book, January 1991

Raizer, Yuri P.; Allen, John E.
Springer Berlin, Heidelberg
DOI: 10.1007/978-3-642-61247-3

Effective collision frequency of electrons in atmospheric gases
journal, August 1971

Itikawa, Yukikazu
Planetary and Space Science, Vol. 19, Issue 8
DOI: 10.1016/0032-0633(71)90149-8

Drift Velocities of Slow Electrons in Helium, Neon, Argon, Hydrogen, and Nitrogen
journal, February 1961

Pack, J. L.; Phelps, A. V.
Physical Review, Vol. 121, Issue 3
DOI: 10.1103/PhysRev.121.798

The Drift Velocity of Electrons in Hydrogen and Nitrogen
journal, January 1963

Lowke, Jj
Australian Journal of Physics, Vol. 16, Issue 1
DOI: 10.1071/PH630115

Pressure Dependence of Electron Drift Velocity in Hydrogen at 77.8°K
journal, January 1972

Bartels, A.
Physical Review Letters, Vol. 28, Issue 4
DOI: 10.1103/PhysRevLett.28.213

The electron drift velocity in dense gases
journal, November 1977

Atrazhev, V. M.; Iakubov, I. T.
Journal of Physics D: Applied Physics, Vol. 10, Issue 16
DOI: 10.1088/0022-3727/10/16/005

Monte Carlo Simulation of Electron Swarms in H2
journal, January 1977

Hunter, Sr
Australian Journal of Physics, Vol. 30, Issue 1
DOI: 10.1071/PH770083

Theory of the density dependence of electron drift velocity in gases
journal, August 1978

Braglia, G. L.; Dallacasa, V.
Physical Review A, Vol. 18, Issue 2
DOI: 10.1103/PhysRevA.18.711

General model for electron drift and diffusion in a dense gas
journal, January 1992

O'Malley, T. F.
Journal of Physics B: Atomic, Molecular and Optical Physics, Vol. 25, Issue 1
DOI: 10.1088/0953-4075/25/1/020

Bestimmung der Driftgeschwindigkeit von Elektronen in Wasserstoff und Stickstoff bei hohem Druck
journal, February 1967

Gr�nberg, R.
Zeitschrift f�r Physik, Vol. 204, Issue 1
DOI: 10.1007/BF01326213

Density dependence of electron mobility in dense gases
journal, September 1994

Bagheri, A.; Baluja, K. L.; Datta, Savita M.
Zeitschrift f�r Physik D Atoms, Molecules and Clusters, Vol. 32, Issue 3
DOI: 10.1007/BF01437150

Density dependence of electron drift velocities in helium and hydrogen at 77.6 K
journal, September 1975

Bartels, A.
Applied Physics, Vol. 8, Issue 1
DOI: 10.1007/BF00883671

Resonance Scattering and the Drift Motion of Electrons through Gases
journal, August 1968

Frommhold, Lothar
Physical Review, Vol. 172, Issue 1
DOI: 10.1103/PhysRev.172.118

Theory of electron mobility in dense gases
journal, August 1982

Braglia, G. L.; Dallacasa, V.
Physical Review A, Vol. 26, Issue 2
DOI: 10.1103/PhysRevA.26.902

Electron distribution and mobility in a dense gas of repulsive scatterers
journal, November 1989

O'Malley, T. F.
Journal of Physics B: Atomic, Molecular and Optical Physics, Vol. 22, Issue 22
DOI: 10.1088/0953-4075/22/22/017

Multiple scattering effect on electron mobilities in dense gases
journal, April 1980

O'Malley, T. F.
Journal of Physics B: Atomic and Molecular Physics, Vol. 13, Issue 7
DOI: 10.1088/0022-3700/13/7/024

Electron mobility variation in dense hydrogen gas
journal, August 1971

Harrison, H. R.; Springett, B. E.
Chemical Physics Letters, Vol. 10, Issue 4
DOI: 10.1016/0009-2614(71)80323-8

Rotational Excitation and Momentum Transfer Cross Sections for Electrons in $H_{2}$ and $N_{2}$ from Transport Coefficients
journal, September 1962

Frost, L. S.; Phelps, A. V.
Physical Review, Vol. 127, Issue 5
DOI: 10.1103/PhysRev.127.1621

Mobilities of Mass-Identified $H_{3}^{+}$ and $H^{+}$ Ions in Hydrogen
journal, July 1968

Albritton, D. L.; Miller, T. M.; Martin, D. W.
Physical Review, Vol. 171, Issue 1
DOI: 10.1103/PhysRev.171.94

Transport properties of gaseous ions over a wide energy range
journal, March 1976

Ellis, H. W.; Pai, R. Y.; McDaniel, E. W.
Atomic Data and Nuclear Data Tables, Vol. 17, Issue 3
DOI: 10.1016/0092-640X(76)90001-2

Mobility of Hydrogen Ions ( $H^{+}$ , $H_{2}^{+}$ , $H_{3}^{+}$ ) in Hydrogen
journal, April 1959

Mason, Edward A.; Vanderslice, Joseph T.
Physical Review, Vol. 114, Issue 2
DOI: 10.1103/PhysRev.114.497

Reactions of $H^{+}$ in $H_{2}$ and $D^{+}$ in $D_{2}$ ; Mobilities of Hydrogen and Alkali Ions in $H_{2}$ and $D_{2}$ Gases
journal, September 1968

Miller, T. M.; Moseley, J. T.; Martin, D. W.
Physical Review, Vol. 173, Issue 1
DOI: 10.1103/PhysRev.173.115

Transport Properties of Gaseous Ions over a Wide Energy Range, IV
journal, May 1995

Viehland, L. A.; Mason, E. A.
Atomic Data and Nuclear Data Tables, Vol. 60, Issue 1
DOI: 10.1006/adnd.1995.1004

The Mobility of H+3 and H+5 Ions in Hydrogen and the Equilibrium Constant for the Reaction H+3+2H2<=> H+5+H2 at Gas Temperatures of 195, 273 and 293 K
journal, January 1974

Elford, Mt; Milloy, Hb
Australian Journal of Physics, Vol. 27, Issue 6
DOI: 10.1071/PH740795

Diffusion and Mobility of ions in a gas
journal, March 1967

Smirnov, Boris M.
Soviet Physics Uspekhi, Vol. 10, Issue 3
DOI: 10.1070/PU1967v010n03ABEH003249

Measurements of the Mobilities of the Negative Ions in Oxygen and in Mixtures of Oxygen with the Noble Gases, Hydrogen, Nitrogen, and Carbon Dioxide
journal, September 1957

McDaniel, E. W.; Crane, H. R.
Review of Scientific Instruments, Vol. 28, Issue 9
DOI: 10.1063/1.1715976

Electron Drift And Diffusion In Deuterium At 293°K
journal, January 1966

McIntosh, Al
Australian Journal of Physics, Vol. 19, Issue 6, p. 805
DOI: 10.1071/PH660805

Drift Velocity of Electrons in Helium
journal, January 1960

Phelps, A. V.; Pack, J. L.; Frost, L. S.
Physical Review, Vol. 117, Issue 2
DOI: 10.1103/PhysRev.117.470

Mobility of Mass-Analyzed $H^{+}$ , $H_{3}^{+}$ , and $H_{5}^{+}$ Ions in Hydrogen Gas
journal, July 1965

Saporoschenko, M.
Physical Review, Vol. 139, Issue 2A
DOI: 10.1103/PhysRev.139.A349

A critical review of H ₃ ⁺ recombination studies
journal, January 2005

Johnsen, Rainer
Journal of Physics: Conference Series, Vol. 4
DOI: 10.1088/1742-6596/4/1/011

The recombination of and ions with electrons in hydrogen plasma: dependence on temperature and on pressure of H ₂
journal, November 2003

Glosík, J.; Novotný, O.; Pysanenko, A.
Plasma Sources Science and Technology, Vol. 12, Issue 4
DOI: 10.1088/0963-0252/12/4/027

Measurements of Recombination of Electrons with $H_{3}^{+}$ and $H_{5}^{+}$ Ions
journal, July 1973

Leu, M. T.; Biondi, Manfred A.; Johnsen, R.
Physical Review A, Vol. 8, Issue 1
DOI: 10.1103/PhysRevA.8.413

Recombination of electrons with H3+ and H5+ ions
journal, May 1984

Macdonald, Jeffrey A.; Biondi, Manfred A.; Johnsen, Rainer
Planetary and Space Science, Vol. 32, Issue 5
DOI: 10.1016/0032-0633(84)90117-X

The recombination of D ⁺ ₃ and D ⁺ ₅ ions with electrons in deuterium containing plasma
journal, May 2006

Novotný, O.; Plašil, R.; Pysanenko, A.
Journal of Physics B: Atomic, Molecular and Optical Physics, Vol. 39, Issue 11
DOI: 10.1088/0953-4075/39/11/019

On the Mechanism of Unimolecular Electron Capture
journal, October 1935

Bloch, Felix; Bradbury, Norris E.
Physical Review, Vol. 48, Issue 8
DOI: 10.1103/PhysRev.48.689

Three-body electron attachment to a molecule [Trekhchastichnoe prilipanie elektrona k molekule]
journal, January 1988

Aleksandrov, N. L.
Uspekhi Fizicheskih Nauk, Vol. 154, Issue 2
DOI: 10.3367/UFNr.0154.198802a.0177

Measurements of the Attachment of Low-Energy Electrons to Oxygen Molecules
journal, October 1962

Chanin, L. M.; Phelps, A. V.; Biondi, M. A.
Physical Review, Vol. 128, Issue 1
DOI: 10.1103/PhysRev.128.219

Kinetic scheme of the non-equilibrium discharge in nitrogen-oxygen mixtures
journal, August 1992

Kossyi, I. A.; Kostinsky, A. Yu; Matveyev, A. A.
Plasma Sources Science and Technology, Vol. 1, Issue 3
DOI: 10.1088/0963-0252/1/3/011

Attachment of Slow Electrons to Oxygen Molecules
journal, December 1969

Herzenberg, A.
The Journal of Chemical Physics, Vol. 51, Issue 11
DOI: 10.1063/1.1671887

Laboratory studies of electron attachment and detachment processes of aeronomic interest
journal, May 1969

Phelps, A. V.
Canadian Journal of Chemistry, Vol. 47, Issue 10
DOI: 10.1139/v69-289

Ionization and Attachment in $O_{2}$ and Airlike $N_{2}$ : $O_{2}$ Mixtures Irradiated by 1.5-MeV Electrons
journal, February 1969

Hirsh, M. N.; Eisner, P. N.; Slevin, J. A.
Physical Review, Vol. 178, Issue 1
DOI: 10.1103/PhysRev.178.175

Low energy (≲1 eV) electron attachment to molecules at very high gas densities: O ₂
journal, June 1972

McCorkle, D. L.; Christophorou, L. G.; Anderson, V. E.
Journal of Physics B: Atomic and Molecular Physics, Vol. 5, Issue 6
DOI: 10.1088/0022-3700/5/6/023

Three-Body Attachment in $O_{2}$ Using Electron Beams
journal, February 1972

Spence, D.; Schulz, G. J.
Physical Review A, Vol. 5, Issue 2
DOI: 10.1103/PhysRevA.5.724

Electron Attachment and Detachment. I. Pure O ₂ at Low Energy
journal, March 1966

Pack, J. L.; Phelps, A. V.
The Journal of Chemical Physics, Vol. 44, Issue 5
DOI: 10.1063/1.1726956

Thermal electron attachment to O2 in H2 and D2
journal, March 1976

Shimamori, Hiroshi; Hatano, Yoshihiko
Chemical Physics Letters, Vol. 38, Issue 2
DOI: 10.1016/0009-2614(76)85146-9

Plasma Chemistry
book, January 2008

Fridman, Alexander
Cambridge University Press
DOI: 10.1017/CBO9780511546075

Three-body ionic recombination at moderate and high gas densities
journal, February 1969

Bates, D. R.; Flannery, M. R.
Journal of Physics B: Atomic and Molecular Physics, Vol. 2, Issue 2
DOI: 10.1088/0022-3700/2/2/306

Ion—Ion Recombination
journal, January 1964

Brueckner, Keith A.
The Journal of Chemical Physics, Vol. 40, Issue 2
DOI: 10.1063/1.1725134

Electron–Ion and Ion–Ion Dissociative Recombination of Oxygen. II. Ion–Ion Recombination
journal, September 1968

Chan, F. T.
The Journal of Chemical Physics, Vol. 49, Issue 6
DOI: 10.1063/1.1670451

Theoretical and Experimental Three-Body Ionic Recombination Coefficients
journal, December 1968

Flannery, M. R.
Physical Review Letters, Vol. 21, Issue 26
DOI: 10.1103/PhysRevLett.21.1729

Absorbing‐Sphere Model for Calculating Ion—Ion Recombination Total Cross Sections
journal, March 1972

Olson, Ronald E.
The Journal of Chemical Physics, Vol. 56, Issue 6
DOI: 10.1063/1.1677632

Ion–Ion Recombination Total Cross Sections—Atomic Species
journal, November 1970

Olson, Ronald E.; Peterson, James R.; Moseley, John
The Journal of Chemical Physics, Vol. 53, Issue 9
DOI: 10.1063/1.1674506

Six-dimensional muon beam cooling using a homogeneous absorber: Concepts, beam dynamics, cooling decrements, and equilibrium emittances in a helical dipole channel
journal, April 2005

Derbenev, Yaroslav; Johnson, Rolland P.
Physical Review Special Topics - Accelerators and Beams, Vol. 8, Issue 4
DOI: 10.1103/PhysRevSTAB.8.041002

Works referencing / citing this record:

Muon disrupts AKT hydrogen bond network in cancer
journal, October 2018

Radisavljevic, Ziv
Journal of Cellular Physiology, Vol. 234, Issue 6
DOI: 10.1002/jcp.27554

Similar Records in DOE PAGES and OSTI.GOV collections:

Simulation of beam-induced plasma in gas-filled rf cavities

Journal Article Yu, Kwangmin ; Samulyak, Roman ; Yonehara, Katsuya ; ... - Physical Review Accelerators and Beams

Processes occurring in a radio-frequency (rf) cavity, filled with high pressure gas and interacting with proton beams, have been studied via advanced numerical simulations. Simulations support the experimental program on the hydrogen gas-filled rf cavity in the Mucool Test Area (MTA) at Fermilab, and broader research on the design of muon cooling devices. space, a 3D electromagnetic particle-in-cell (EM-PIC) code with atomic physics support, was used in simulation studies. Plasma dynamics in the rf cavity, including the process of neutral gas ionization by proton beams, plasma loading of the rf cavity, and atomic processes in plasma such as electron-ion andmore »« less
Cited by 7
https://doi.org/10.1103/PhysRevAccelBeams.20.032002
Pressurized $H_{2}$ rf Cavities in Ionizing Beams and Magnetic Fields

Journal Article Chung, M. ; Collura, M. G. ; Flanagan, G. ; ... - Physical Review Letters

A major technological challenge in building a muon cooling channel is operating RF cavities in multi-tesla external magnetic fields. We report the first experimental characterization of a high pressure gas-filled 805 MHz RF cavity for use with intense ionizing beams and strong external magnetic fields. RF power consumption by beam-induced plasma was investigated with hydrogen and deuterium gases with pressures between 20 and 100 atm and peak RF gradients between 5 and 50 MV/m. The energy absorption per ion pair-RF cycle ranges from 10-18 to 10-16 J. The low pressure case agrees well with an analytical model based on electronmore »« less
https://doi.org/10.1103/PhysRevLett.111.184802

Full Text Available
Simulation of plasma loading of high-pressure RF cavities

Journal Article Yu, K. ; Samulyak, R. ; Yonehara, K. ; ... - Journal of Instrumentation

Muon beam-induced plasma loading of radio-frequency (RF) cavities filled with high pressure hydrogen gas with 1% dry air dopant has been studied via numerical simulations. The electromagnetic code SPACE, that resolves relevant atomic physics processes, including ionization by the muon beam, electron attachment to dopant molecules, and electron-ion and ion-ion recombination, has been used. Simulations studies have also been performed in the range of parameters typical for practical muon cooling channels.
Cited by 2
https://doi.org/10.1088/1748-0221/13/01/P01008

Full Text Available
Electron Recombination in a Dense Hydrogen Plasma

Conference Jana, M R ; Johnstone, C ; Kobilarcik, T ; ... - Conf.Proc.C1205201:217-219,2012

A high pressure hydrogen gas filled RF cavity was subjected to an intense proton beam to study the evolution of the beam induced plasma inside the cavity. Varying beam intensities, gas pressures and electric fields were tested. Beam induced ionized electrons load the cavity, thereby decreasing the accelerating gradient. The extent and duration of this degradation has been measured. A model of the recombination between ionized electrons and ions is presented, with the intent of producing a baseline for the physics inside such a cavity used in a muon accelerator. Analysis of the data taken during the summer of 2011more »« less
Full Text Available
Chemical Free Surface Processing for High Gradient Superconducting RF Cavities

Technical Report Cruz, Edward J.

Chemical treatment such as buffered chemical polishing (BCP) or electro polishing (EP) followed by high pressure rinsing (HPR) of niobium (Nb) superconducting RF (SRF) cavities is expensive and complex multistep process. Furthermore, the cavity RF surfaces after the treatment still have numerous bubbles and pits that result from welding. These quench-producing weld defects together with the particulate contamination, result in significant scatter of the multi-cell Nb SRF cavities performance characteristics. This scatter is the major problem in the current manufacturing of the Nb SRF cavities. When developed the chemical free surafce processing using IEB will benefit first J-lab's CEBAF andmore »« less
https://doi.org/10.2172/1464736

Full Text Available

Similar Records

Title: Pressurized rf cavities in ionizing beams

Abstract

Citation Formats

Dark current, breakdown, and magnetic field effects in a multicell, 805 MHz cavity journal, July 2003

Effects of high solenoidal magnetic fields on rf accelerating cavities journal, July 2005

Triggers for RF breakdown journal, February 2005

Effects of external magnetic fields on the operation of high-gradient accelerating structures journal, August 2010

Pressurized H 2 rf Cavities in Ionizing Beams and Magnetic Fields journal, October 2013

Measurement of transmission efficiency for 400 MeV proton beam through collimator at Fermilab MuCool Test Area using Chromox-6 scintillation screen journal, June 2013

Ionization and excitation of hydrogen molecules by fast proton impact journal, January 1996

Cross Sections and Swarm Coefficients for H + , H 2 + , H 3 + , H, H 2 , and H − in H 2 for Energies from 0.1 eV to 10 keV journal, May 1990

On the dynamics of the reaction of positive hydrogen cluster ions (H5+ to H23+) with para and normal hydrogen at 10 K journal, November 1995

Gas Discharge Physics book, January 1991

Effective collision frequency of electrons in atmospheric gases journal, August 1971

Drift Velocities of Slow Electrons in Helium, Neon, Argon, Hydrogen, and Nitrogen journal, February 1961

The Drift Velocity of Electrons in Hydrogen and Nitrogen journal, January 1963

Pressure Dependence of Electron Drift Velocity in Hydrogen at 77.8°K journal, January 1972

The electron drift velocity in dense gases journal, November 1977

Monte Carlo Simulation of Electron Swarms in H2 journal, January 1977

Theory of the density dependence of electron drift velocity in gases journal, August 1978

General model for electron drift and diffusion in a dense gas journal, January 1992

Bestimmung der Driftgeschwindigkeit von Elektronen in Wasserstoff und Stickstoff bei hohem Druck journal, February 1967

Density dependence of electron mobility in dense gases journal, September 1994

Density dependence of electron drift velocities in helium and hydrogen at 77.6 K journal, September 1975

Resonance Scattering and the Drift Motion of Electrons through Gases journal, August 1968

Theory of electron mobility in dense gases journal, August 1982

Electron distribution and mobility in a dense gas of repulsive scatterers journal, November 1989

Multiple scattering effect on electron mobilities in dense gases journal, April 1980

Electron mobility variation in dense hydrogen gas journal, August 1971

Rotational Excitation and Momentum Transfer Cross Sections for Electrons in H 2 and N 2 from Transport Coefficients journal, September 1962

Mobilities of Mass-Identified H 3 + and H + Ions in Hydrogen journal, July 1968

Transport properties of gaseous ions over a wide energy range journal, March 1976

Mobility of Hydrogen Ions ( H + , H 2 + , H 3 + ) in Hydrogen journal, April 1959

Reactions of H + in H 2 and D + in D 2 ; Mobilities of Hydrogen and Alkali Ions in H 2 and D 2 Gases journal, September 1968

Transport Properties of Gaseous Ions over a Wide Energy Range, IV journal, May 1995

The Mobility of H+3 and H+5 Ions in Hydrogen and the Equilibrium Constant for the Reaction H+3+2H2<=> H+5+H2 at Gas Temperatures of 195, 273 and 293 K journal, January 1974

Diffusion and Mobility of ions in a gas journal, March 1967

Measurements of the Mobilities of the Negative Ions in Oxygen and in Mixtures of Oxygen with the Noble Gases, Hydrogen, Nitrogen, and Carbon Dioxide journal, September 1957

Electron Drift And Diffusion In Deuterium At 293°K journal, January 1966

Drift Velocity of Electrons in Helium journal, January 1960

Mobility of Mass-Analyzed H + , H 3 + , and H 5 + Ions in Hydrogen Gas journal, July 1965

A critical review of H 3 + recombination studies journal, January 2005

The recombination of and ions with electrons in hydrogen plasma: dependence on temperature and on pressure of H 2 journal, November 2003

Measurements of Recombination of Electrons with H 3 + and H 5 + Ions journal, July 1973

Recombination of electrons with H3+ and H5+ ions journal, May 1984

The recombination of D + 3 and D + 5 ions with electrons in deuterium containing plasma journal, May 2006

On the Mechanism of Unimolecular Electron Capture journal, October 1935

Three-body electron attachment to a molecule [Trekhchastichnoe prilipanie elektrona k molekule] journal, January 1988

Measurements of the Attachment of Low-Energy Electrons to Oxygen Molecules journal, October 1962

Kinetic scheme of the non-equilibrium discharge in nitrogen-oxygen mixtures journal, August 1992

Attachment of Slow Electrons to Oxygen Molecules journal, December 1969

Laboratory studies of electron attachment and detachment processes of aeronomic interest journal, May 1969

Ionization and Attachment in O 2 and Airlike N 2 : O 2 Mixtures Irradiated by 1.5-MeV Electrons journal, February 1969

Low energy (≲1 eV) electron attachment to molecules at very high gas densities: O 2 journal, June 1972

Three-Body Attachment in O 2 Using Electron Beams journal, February 1972

Electron Attachment and Detachment. I. Pure O 2 at Low Energy journal, March 1966

Thermal electron attachment to O2 in H2 and D2 journal, March 1976

Plasma Chemistry book, January 2008

Three-body ionic recombination at moderate and high gas densities journal, February 1969

Ion—Ion Recombination journal, January 1964

Electron–Ion and Ion–Ion Dissociative Recombination of Oxygen. II. Ion–Ion Recombination journal, September 1968

Theoretical and Experimental Three-Body Ionic Recombination Coefficients journal, December 1968

Absorbing‐Sphere Model for Calculating Ion—Ion Recombination Total Cross Sections journal, March 1972

Ion–Ion Recombination Total Cross Sections—Atomic Species journal, November 1970

Six-dimensional muon beam cooling using a homogeneous absorber: Concepts, beam dynamics, cooling decrements, and equilibrium emittances in a helical dipole channel journal, April 2005

Muon disrupts AKT hydrogen bond network in cancer journal, October 2018

Dark current, breakdown, and magnetic field effects in a multicell, 805 MHz cavity
journal, July 2003

Effects of high solenoidal magnetic fields on rf accelerating cavities
journal, July 2005

Triggers for RF breakdown
journal, February 2005

Effects of external magnetic fields on the operation of high-gradient accelerating structures
journal, August 2010

Pressurized $H_{2}$ rf Cavities in Ionizing Beams and Magnetic Fields
journal, October 2013

Measurement of transmission efficiency for 400 MeV proton beam through collimator at Fermilab MuCool Test Area using Chromox-6 scintillation screen
journal, June 2013

Ionization and excitation of hydrogen molecules by fast proton impact
journal, January 1996

Cross Sections and Swarm Coefficients for H ⁺ , H ₂ ⁺ , H ₃ ⁺ , H, H ₂ , and H ⁻ in H ₂ for Energies from 0.1 eV to 10 keV
journal, May 1990

On the dynamics of the reaction of positive hydrogen cluster ions (H5+ to H23+) with para and normal hydrogen at 10 K
journal, November 1995

Gas Discharge Physics
book, January 1991

Effective collision frequency of electrons in atmospheric gases
journal, August 1971

Drift Velocities of Slow Electrons in Helium, Neon, Argon, Hydrogen, and Nitrogen
journal, February 1961

The Drift Velocity of Electrons in Hydrogen and Nitrogen
journal, January 1963

Pressure Dependence of Electron Drift Velocity in Hydrogen at 77.8°K
journal, January 1972

The electron drift velocity in dense gases
journal, November 1977

Monte Carlo Simulation of Electron Swarms in H2
journal, January 1977

Theory of the density dependence of electron drift velocity in gases
journal, August 1978

General model for electron drift and diffusion in a dense gas
journal, January 1992

Bestimmung der Driftgeschwindigkeit von Elektronen in Wasserstoff und Stickstoff bei hohem Druck
journal, February 1967

Density dependence of electron mobility in dense gases
journal, September 1994

Density dependence of electron drift velocities in helium and hydrogen at 77.6 K
journal, September 1975

Resonance Scattering and the Drift Motion of Electrons through Gases
journal, August 1968

Theory of electron mobility in dense gases
journal, August 1982

Electron distribution and mobility in a dense gas of repulsive scatterers
journal, November 1989

Multiple scattering effect on electron mobilities in dense gases
journal, April 1980

Electron mobility variation in dense hydrogen gas
journal, August 1971

Rotational Excitation and Momentum Transfer Cross Sections for Electrons in $H_{2}$ and $N_{2}$ from Transport Coefficients
journal, September 1962

Mobilities of Mass-Identified $H_{3}^{+}$ and $H^{+}$ Ions in Hydrogen
journal, July 1968

Transport properties of gaseous ions over a wide energy range
journal, March 1976

Mobility of Hydrogen Ions ( $H^{+}$ , $H_{2}^{+}$ , $H_{3}^{+}$ ) in Hydrogen
journal, April 1959

Reactions of $H^{+}$ in $H_{2}$ and $D^{+}$ in $D_{2}$ ; Mobilities of Hydrogen and Alkali Ions in $H_{2}$ and $D_{2}$ Gases
journal, September 1968

Transport Properties of Gaseous Ions over a Wide Energy Range, IV
journal, May 1995

The Mobility of H+3 and H+5 Ions in Hydrogen and the Equilibrium Constant for the Reaction H+3+2H2<=> H+5+H2 at Gas Temperatures of 195, 273 and 293 K
journal, January 1974

Diffusion and Mobility of ions in a gas
journal, March 1967

Measurements of the Mobilities of the Negative Ions in Oxygen and in Mixtures of Oxygen with the Noble Gases, Hydrogen, Nitrogen, and Carbon Dioxide
journal, September 1957

Electron Drift And Diffusion In Deuterium At 293°K
journal, January 1966

Drift Velocity of Electrons in Helium
journal, January 1960

Mobility of Mass-Analyzed $H^{+}$ , $H_{3}^{+}$ , and $H_{5}^{+}$ Ions in Hydrogen Gas
journal, July 1965

A critical review of H ₃ ⁺ recombination studies
journal, January 2005

The recombination of and ions with electrons in hydrogen plasma: dependence on temperature and on pressure of H ₂
journal, November 2003

Measurements of Recombination of Electrons with $H_{3}^{+}$ and $H_{5}^{+}$ Ions
journal, July 1973

Recombination of electrons with H3+ and H5+ ions
journal, May 1984

The recombination of D ⁺ ₃ and D ⁺ ₅ ions with electrons in deuterium containing plasma
journal, May 2006

On the Mechanism of Unimolecular Electron Capture
journal, October 1935

Three-body electron attachment to a molecule [Trekhchastichnoe prilipanie elektrona k molekule]
journal, January 1988

Measurements of the Attachment of Low-Energy Electrons to Oxygen Molecules
journal, October 1962

Kinetic scheme of the non-equilibrium discharge in nitrogen-oxygen mixtures
journal, August 1992

Attachment of Slow Electrons to Oxygen Molecules
journal, December 1969

Laboratory studies of electron attachment and detachment processes of aeronomic interest
journal, May 1969

Ionization and Attachment in $O_{2}$ and Airlike $N_{2}$ : $O_{2}$ Mixtures Irradiated by 1.5-MeV Electrons
journal, February 1969

Low energy (≲1 eV) electron attachment to molecules at very high gas densities: O ₂
journal, June 1972

Three-Body Attachment in $O_{2}$ Using Electron Beams
journal, February 1972

Electron Attachment and Detachment. I. Pure O ₂ at Low Energy
journal, March 1966

Thermal electron attachment to O2 in H2 and D2
journal, March 1976

Plasma Chemistry
book, January 2008

Three-body ionic recombination at moderate and high gas densities
journal, February 1969

Ion—Ion Recombination
journal, January 1964

Electron–Ion and Ion–Ion Dissociative Recombination of Oxygen. II. Ion–Ion Recombination
journal, September 1968

Theoretical and Experimental Three-Body Ionic Recombination Coefficients
journal, December 1968

Absorbing‐Sphere Model for Calculating Ion—Ion Recombination Total Cross Sections
journal, March 1972

Ion–Ion Recombination Total Cross Sections—Atomic Species
journal, November 1970

Six-dimensional muon beam cooling using a homogeneous absorber: Concepts, beam dynamics, cooling decrements, and equilibrium emittances in a helical dipole channel
journal, April 2005

Muon disrupts AKT hydrogen bond network in cancer
journal, October 2018