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Title: An overview of Booster and AGS Polarized Proton Operations during Run 17

Abstract

There were only a few differences in the setup between this year’s Polarized Proton run and the previous one (Run 15). Consequently, this note will focus on these differences as well as a few more notable studies done during the course of the run. This year, the Booster input intensity was kept around 7e11 for the majority of the run whereas in Run 15 it was kept around 9e11. It was lowered because there was some indication that the source polarization was higher with this lower input. Some of the polarization measurements that motivated this change will be discussed. Both the emittance and polarization on the AGS flattop show intensity dependence, thought to be related to the peak current, especially early in the AGS acceleration ramp. In Run 15, the AGS Rf was configured for h=8, but in this run h=6 was used to reduce the peak current and also to allow for the possibility of using a dual harmonic to reduce it further. Eventually, a dual harmonic configuration was used for the first 100 ms or so of the AGS acceleration cycle. Two cavities were set to h=12 and phased differently than the other 8 to accomplish this. Quadmore » pumping was also used at Booster extraction to make the bunch injected into the AGS wider in order to match the dual harmonic bucket right at injection. This configuration, which was used for the majority of the run, will be described. Measurements of the intensity dependence of the transverse emittance and polarization with and without it will be compared.« less

Authors:
 [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1412766
Report Number(s):
BNL-114742-2017-IR
DOE Contract Number:
SC0012704
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS

Citation Formats

Zeno, K. An overview of Booster and AGS Polarized Proton Operations during Run 17. United States: N. p., 2017. Web. doi:10.2172/1412766.
Zeno, K. An overview of Booster and AGS Polarized Proton Operations during Run 17. United States. doi:10.2172/1412766.
Zeno, K. Wed . "An overview of Booster and AGS Polarized Proton Operations during Run 17". United States. doi:10.2172/1412766. https://www.osti.gov/servlets/purl/1412766.
@article{osti_1412766,
title = {An overview of Booster and AGS Polarized Proton Operations during Run 17},
author = {Zeno, K.},
abstractNote = {There were only a few differences in the setup between this year’s Polarized Proton run and the previous one (Run 15). Consequently, this note will focus on these differences as well as a few more notable studies done during the course of the run. This year, the Booster input intensity was kept around 7e11 for the majority of the run whereas in Run 15 it was kept around 9e11. It was lowered because there was some indication that the source polarization was higher with this lower input. Some of the polarization measurements that motivated this change will be discussed. Both the emittance and polarization on the AGS flattop show intensity dependence, thought to be related to the peak current, especially early in the AGS acceleration ramp. In Run 15, the AGS Rf was configured for h=8, but in this run h=6 was used to reduce the peak current and also to allow for the possibility of using a dual harmonic to reduce it further. Eventually, a dual harmonic configuration was used for the first 100 ms or so of the AGS acceleration cycle. Two cavities were set to h=12 and phased differently than the other 8 to accomplish this. Quad pumping was also used at Booster extraction to make the bunch injected into the AGS wider in order to match the dual harmonic bucket right at injection. This configuration, which was used for the majority of the run, will be described. Measurements of the intensity dependence of the transverse emittance and polarization with and without it will be compared.},
doi = {10.2172/1412766},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Oct 11 00:00:00 EDT 2017},
month = {Wed Oct 11 00:00:00 EDT 2017}
}

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