TRANSVERSE ECHO MEASUREMENTS IN RHIC.

FISCHER, W

Title: TRANSVERSE ECHO MEASUREMENTS IN RHIC.

Full Record
Other Related Research

Abstract

Diffusion counteracts cooling and the knowledge of diffusion rates is important for the calculation of cooling times and equilibrium beam sizes. Echo measurements are a potentially sensitive method to determine diffusion rates, and longitudinal measurements were done in a number of machines. We report on transverse echo measurements in RHIC and the observed dependence of echo amplitudes on a number of parameters for beams of gold and copper ions, and protons. In particular they examine the echo amplitudes of gold and copper ion bunches of varying intensity, which exhibit different diffusion rates from intrabeam scattering.

Authors:: FISCHER, W

Publication Date:: Sun Sep 18 00:00:00 EDT 2005

Research Org.:: Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Org.:: DOE/SC

OSTI Identifier:: 891912

Report Number(s):: BNL-75035-2005-CP
R&D Project: 18026; KB0202011; TRN: US0605531

DOE Contract Number:: DE-AC02-98CH10886

Resource Type:: Conference

Resource Relation:: Conference: THE INTERNATIONAL WORKSHOP ON BEAM COOLING AND RELATED TOPICS (COOL05); GALENA, IL; 20050918 through 20050923

Country of Publication:: United States

Language:: English

Subject:: 43 PARTICLE ACCELERATORS; AMPLITUDES; BEAM COOLING; COOLING TIME; COPPER IONS; DIFFUSION; GOLD; PROTONS; SCATTERING; BROOKHAVEN RHIC

Citation Formats


                    FISCHER, W. TRANSVERSE ECHO MEASUREMENTS IN RHIC..  United States: N. p., 2005. 
        Web.

Copy to clipboard


                    FISCHER, W. TRANSVERSE ECHO MEASUREMENTS IN RHIC..  United States.

Copy to clipboard


                    FISCHER, W. 2005.  
        "TRANSVERSE ECHO MEASUREMENTS IN RHIC.".  United States.  https://www.osti.gov/servlets/purl/891912.

Copy to clipboard


                    
@article{osti_891912,

  title        = {TRANSVERSE ECHO MEASUREMENTS IN RHIC.},

  author       = {FISCHER, W},

  abstractNote = {Diffusion counteracts cooling and the knowledge of diffusion rates is important for the calculation of cooling times and equilibrium beam sizes. Echo measurements are a potentially sensitive method to determine diffusion rates, and longitudinal measurements were done in a number of machines. We report on transverse echo measurements in RHIC and the observed dependence of echo amplitudes on a number of parameters for beams of gold and copper ions, and protons. In particular they examine the echo amplitudes of gold and copper ion bunches of varying intensity, which exhibit different diffusion rates from intrabeam scattering.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/891912},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Sun Sep 18 00:00:00 EDT 2005},

  month        = {Sun Sep 18 00:00:00 EDT 2005}

}

Copy to clipboard

Conference:

View Conference

Other availability

Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Transverse Echo Measurements in RHIC

Journal Article Fischer, Wolfram - AIP Conference Proceedings

Diffusion counteracts cooling and the knowledge of diffusion rates is important for the calculation of cooling times and equilibrium beam sizes. Echo measurements are a potentially sensitive method to determine diffusion rates, and longitudinal measurements were done in a number of machines. We report on transverse echo measurements in RHIC and the observed dependence of echo amplitudes on a number of parameters for beams of gold and copper ions, and protons. In particular we examine the echo amplitudes of gold and copper ion bunches of varying intensity, which exhibit different diffusion rates from intrabeam scattering.
https://doi.org/10.1063/1.2190103
MEASUREMENT OF TRANSVERSE ECHOES IN RHIC.

Conference FISCHER, W; SATOGATA, T; TOMAS, R

Beam echoes are a very sensitive method to measure diffusion, and longitudinal echo measurements were performed in a number of machines. In RHIC, for the first time, a transverse beam echo was observed after applying a dipole kick followed by a quadrupole .kick. After application of the dipole kick, the dipole moment decohered completely due to lattice nonlinearities. When a quadrupole kick is applied at time {tau} after the dipole kick, the beam re-cohered at time 2{tau} thus showing an echo response. We describe the experimental setup and measurement results. In the measurements the dipole and quadrupole kick amplitudes, amplitudemore »« less
Full Text Available
BUNCHED BEAM STOCHASTIC COOLING PROJECT FOR RHIC.

Conference BRENNAN, J; BASKIEWICZ, M

The main performance limitation for RHIC is emittance growth caused by IntraBeam Scattering during the store. We have developed a longitudinal bunched-beam stochastic cooling system in the 5-8 GHz band which will be used to counteract IBS longitudinal emittance growth and prevent de-bunching during the store. Solutions to the technical problems of achieving sufficient kicker voltage and overcoming the electronic saturation effects caused by coherent components within the Schottky spectrum are described. Results from tests with copper ions in RHIC during the FY05 physics run, including the observation of signal suppression, are presented.
Full Text Available
Bunched Beam Stochastic Cooling Project for RHIC

Journal Article Brennan, J; Blaskiewicz, M - AIP Conference Proceedings

The main performance limitation for RHIC is emittance growth caused by IntraBeam Scattering during the store. We have developed a longitudinal bunched-beam stochastic cooling system in the 5-8 GHz band which will be used to counteract IBS longitudinal emittance growth and prevent de-bunching during the store. Solutions to the technical problems of achieving sufficient kicker voltage and overcoming the electronic saturation effects caused by coherent components within the Schottky spectrum are described. Results from tests with copper ions in RHIC during the FY05 physics run, including the observation of signal suppression, are presented.
https://doi.org/10.1063/1.2190109
Diffusion measurement from observed transverse beam echoes

Journal Article Sen, Tanaji; Fischer, Wolfram - Physical Review Accelerators and Beams

For this research, we study the measurement of transverse diffusion through beam echoes. We revisit earlier observations of echoes in RHIC and apply an updated theoretical model to these measurements. We consider three possible models for the diffusion coefficient and show that only one is consistent with measured echo amplitudes and pulse widths. This model allows us to parameterize the diffusion coefficients as functions of bunch charge. We demonstrate that echoes can be used to measure diffusion much quicker than present methods and could be useful to a variety of hadron synchrotrons.
Cited by 2
https://doi.org/10.1103/PhysRevAccelBeams.20.011001

Similar Records