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Title: Run 16, eIPM Summary

Three problems with the eIPMs were corrected during the 2015 summer shutdown. These involved ac coupling and 'negative profiles', detector 'dead zone' created by biasing, and gain control on ramp. With respect to Run 16, problems dealt with included gain depletion on horizontal MCP and rf pickup on profile signals; it was found that the MCP was severely damaged over part of the aperture. Various corrective measures were applied. Some results of these measured obtained during Run 16 are shown. At the end of Run 16 there was a three-­day beam run to study polarized proton beams in the AGS. Attempts to minimize beam injection errors which increase emittance by using the eIPMs to measure the contribution of injection mismatch to the AGS output beam emittance are recounted. .
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
OSTI Identifier:
1324265
Report Number(s):
BNL--112516-2016-IR
R&D Project: KBCH139; KB0202011; TRN: US1700048
DOE Contract Number:
SC0012704
Resource Type:
Technical Report
Research Org:
Brookhaven National Lab. (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; DIGITIZERS; SIGNALS; PULSE AMPLIFIERS; PROTON BEAMS; DESIGN; PULSES; BROOKHAVEN AGS; BEAM MONITORS; BEAM PROFILES; ERRORS; CORRECTIONS; GAIN; CONTROL; RF SYSTEMS; POLARIZED BEAMS; BEAM INJECTION; BEAM EMITTANCE; MICROCHANNEL ELECTRON MULTIPLIERS Alternating Gradient Synchrotron