Recording PEP2 Ring Beam Losses at SLAC

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The PEP2 (e+)(e-) storage rings contain many complex interrelated systems. When the beam aborts, examining a record of the orbit from the time just before the abort can help identify the root cause. At the Stanford Linear Accelerator Center (SLAC) a system has been developed to continuously record beam orbits from Beam Position Monitors (BPMS) into a circular buffer. When the beam is aborted the buffers are frozen and their contents are stored for later analysis. BPM orbits are saved on a turn by turn basis for 2800 turns in both the high energy ring (HER) and the low energy ... continued below

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6 pages

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Zelazny, M.; Gromme, T.; Himel, T.; Hendrickson, L.; Krauter, K. & /SLAC September 30, 2005.

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Description

The PEP2 (e+)(e-) storage rings contain many complex interrelated systems. When the beam aborts, examining a record of the orbit from the time just before the abort can help identify the root cause. At the Stanford Linear Accelerator Center (SLAC) a system has been developed to continuously record beam orbits from Beam Position Monitors (BPMS) into a circular buffer. When the beam is aborted the buffers are frozen and their contents are stored for later analysis. BPM orbits are saved on a turn by turn basis for 2800 turns in both the high energy ring (HER) and the low energy ring (LER). Each BPM Processor (BPMP) can either monitor the HER or the LER, but not both as the readout of the two rings is multiplexed into a single readout channel. Tools exist as part of the SLAC Control Program (SCP) to collect, display, and save the data. A physicist or operator can choose a few BPMS in which to view all 2800 turns to identify the turn in which the beam went awry; then ask for that specific orbit from all of the BPMS in the storage ring to determine the root cause of the abort.

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6 pages

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  • Presented at 10th International Conference on Accelerator and Large Experimental Physics Control Systems (ICALEPCS 2005), Geneva, Switzerland, 10-15 Oct 2005

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  • Report No.: SLAC-PUB-11466
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 878372
  • Archival Resource Key: ark:/67531/metadc879209

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • September 30, 2005

Added to The UNT Digital Library

  • Sept. 21, 2016, 2:29 a.m.

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  • Dec. 9, 2016, 8:23 p.m.

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Zelazny, M.; Gromme, T.; Himel, T.; Hendrickson, L.; Krauter, K. & /SLAC. Recording PEP2 Ring Beam Losses at SLAC, article, September 30, 2005; [Menlo Park, California]. (digital.library.unt.edu/ark:/67531/metadc879209/: accessed May 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.