MEASUREMENT OF TRANSVERSE ECHOES IN RHIC.

FISCHER, W; SATOGATA, T; TOMAS, R

Title: MEASUREMENT OF TRANSVERSE ECHOES IN RHIC.

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Abstract

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, amplitude dependent tune shift, and the time between dipole and quadrupole kick were varied. In addition, measurements were taken with gold bunches of different intensities. These should exhibit different transverse diffusion rates due to intra-beam scattering.

Authors:: FISCHER, W; SATOGATA, T; TOMAS, R

Publication Date:: Mon May 16 00:00:00 EDT 2005

Research Org.:: BROOKHAVEN NATIONAL LABORATORY (US)

Sponsoring Org.:: DOE/SC (US)

OSTI Identifier:: 15016281

Report Number(s):: BNL-73454-2005-CP
R&D Project: AD-003; KB-0202011; TRN: US0502160

DOE Contract Number:: AC02-98CH10886

Resource Type:: Conference

Resource Relation:: Conference: PAC 2005 PARTICLE ACCELERATOR CONFERENCE, KNOXVILLE, TN (US), 05/16/2005--05/20/2005; Other Information: PBD: 16 May 2005

Country of Publication:: United States

Language:: English

Subject:: 43 PARTICLE ACCELERATORS; ACCELERATORS; AMPLITUDES; DIFFUSION; DIPOLE MOMENTS; DIPOLES; GOLD; QUADRUPOLES; SCATTERING

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                    FISCHER, W, SATOGATA, T, and TOMAS, R. MEASUREMENT OF TRANSVERSE ECHOES IN RHIC..  United States: N. p., 2005. 
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                    FISCHER, W, SATOGATA, T, & TOMAS, R. MEASUREMENT OF TRANSVERSE ECHOES IN RHIC..  United States.

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                    FISCHER, W, SATOGATA, T, and TOMAS, R. 2005.  
        "MEASUREMENT OF TRANSVERSE ECHOES IN RHIC.".  United States.  https://www.osti.gov/servlets/purl/15016281.

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@article{osti_15016281,

  title        = {MEASUREMENT OF TRANSVERSE ECHOES IN RHIC.},

  author       = {FISCHER, W and SATOGATA, T and TOMAS, R},

  abstractNote = {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, amplitude dependent tune shift, and the time between dipole and quadrupole kick were varied. In addition, measurements were taken with gold bunches of different intensities. These should exhibit different transverse diffusion rates due to intra-beam scattering.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/15016281},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Mon May 16 00:00:00 EDT 2005},

  month        = {Mon May 16 00:00:00 EDT 2005}

}

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