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Title: Transverse impedance measurement in RHIC and the AGS

The RHIC luminosity upgrade program aims for an increase of the polarized proton luminosity by a factor 2. To achieve this goal a significant increase in the beam intensity is foreseen. The beam coupling impedance could therefore represent a source of detrimental effects for beam quality and stability at high bunch intensities. For this reason it is essential to quantify the accelerator impedance budget and the major impedance sources, and possibly cure them. In this MD note we summarize the results of the 2013 transverse impedance measurements in the AGS and RHIC. The studies have been performed measuring the tune shift as a function of bunch intensity and deriving the total accelerator machine transverse impedance. For RHIC, we could obtain first promising results of impedance localization measurements as well.
Authors:
 [1] ;  [2] ;  [2] ;  [2] ;  [2] ;  [2] ;  [2]
  1. European Organization for Nuclear Research (CERN), Geneva (Switzerland)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States). Collider-Accelerator Dept.
Publication Date:
OSTI Identifier:
1131653
Report Number(s):
BNL--105017-2014-IR; BNL--C-A/AP/511
R&D Project: KBCH139; 18031; KB0202011; TRN: US1500103
DOE Contract Number:
AC02-98CH10886
Resource Type:
Technical Report
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States). Relativistic Heavy Ion Collider
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; BROOKHAVEN RHIC; BROOKHAVEN AGS; ELECTRIC IMPEDANCE; BEAMS; COUPLING; BEAM DYNAMICS; STABILITY; BEAM CURRENTS; BEAM LUMINOSITY; TUNING Relativistic Heavy Ion Collider