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Polarized Proton Experiment in the AGS with a Partial Snake

Technical Report ·
DOI:https://doi.org/10.2172/1149827· OSTI ID:1149827
 [1];  [1];  [1];  [2];  [1];  [1];  [1];  [1];  [1];  [3];  [4];  [4];  [1];  [1];  [1];  [5];  [1];  [1];  [1];  [6] more »;  [3];  [1];  [3];  [1];  [1];  [3] « less
  1. Brookhaven National Laboratory (BNL), Upton, NY (United States)
  2. Indiana Univ., Bloomington, IN (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)
  3. Argonne National Laboratory (ANL), Argonne, IL (United States)
  4. Indiana Univ., Bloomington, IN (United States)
  5. Inst. of Physical and Chemical Research (RIKEN), Wako (Japan)
  6. National Lab. for High Energy Physics (KEK), Tsukuba (Japan)
+ Show Author Affiliations
In three polarized proton runs at the AGS it was recently shown that the imperfection depolarizing resonances in the AGS can be overcome with a 5% partial snake and the intrinsic depolarizing resonances could be jumped with the pulsed tune-jump quadrupoles even in the presence of the partial snake. For the first time polarized proton beam was accelerated up to the required RHIC injection energy of 25GeV. No polarization was lost due to the imperfection resonances and the depolarization from most intrinsic resonances was avoided with the time-jump quadrupoles. However, significant amount of polarization was lost at $$0+v_y, 12+v_y$$ and $$36+v_y$$, which is believed to be partially due to coupling resonances. A novel energy-jump method and other new schemes to overcome the coupling and intrinsic resonances are discussed.
Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
DOE Contract Number:
AC02-98CH10886
OSTI ID:
1149827
Report Number(s):
BNL--103670-2014-IR
Country of Publication:
United States
Language:
English

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43 PARTICLE ACCELERATORS