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Title: Comments on Injector Proton Beam Study in Run 2014

During the entire period of injector proton study in run 2014, it seems that the beam transverse emittance out of Booster is larger than that in run 2013. The emittance measured at the BtA transfer line and also the transmission from Booster late to AGS late are presented for this argument. In addition to this problem, it seems that the multiturn Booster injection, which defines the transverse emittance, needs more attention. Moreover, for high intensity operations, the space charge effect may be already relevant in RHIC polarized proton runs. With the RHIC proton intensity improvement in the next several years, higher Booster input intensity is needed, therefore, the space charge effect at the Booster injection and early ramp may become a new limiting factor.
Authors:
 [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States). Collider-Accelerator Dept.
Publication Date:
OSTI Identifier:
1162167
Report Number(s):
BNL--106264-2014-IR; BNL--C-A/AP/530
R&D Project: KBCH139; KB0202011; TRN: US1500126
DOE Contract Number:
AC02-98CH10886
Resource Type:
Technical Report
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States). Alternating Gradient Synchrotron
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; PROTON BEAMS; BROOKHAVEN RHIC; BEAM INJECTION; SPACE CHARGE; PARTICLE BOOSTERS; BEAM EMITTANCE; BEAM EXTRACTION; BEAM TRANSPORT alternating gradient synchrotron