Analysis of Old Copper Synchrotron Light Absorbers from the Stanford Positron Electron Accelerating Ring
Abstract
Synchrotron light absorbers intercept synchrotron radiation to protect chamber walls from excessive heat. When subjected to the high temperature of the beam, these absorbers undergo thermal stress. If the stress is too great or fatigues the material, the absorbers may fail. These absorbers are designed to last the lifetime of the machine. Any premature cracking could result in a leak and, consequently, loss of the ultra high vacuum environment. Using secondary and backscattered electron techniques, several sections of a used copper absorber were analyzed for material damage. Chemical analyses were performed on these samples as well. Comparing the unexposed sections to the sections exposed to the electron beam, few cracks were seen in the copper. However, the exposed samples showed heavy surface damage, in addition to crevices that could eventually result in material failure. Significant corrosion was also evident along the water cooling passage of the samples. These findings suggest that further investigation and periodic inspection of absorbers in SPEAR3 are necessary to control corrosion of the copper.
- Authors:
- Publication Date:
- Research Org.:
- Stanford Linear Accelerator Center (SLAC)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 877470
- Report Number(s):
- SLAC-TN-05-073
TRN: US0601494
- DOE Contract Number:
- AC02-76SF00515
- Resource Type:
- Technical Report
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 43 PARTICLE ACCELERATORS; COPPER; CORROSION; ELECTRON BEAMS; ELECTRONS; LIFETIME; POSITRONS; SYNCHROTRON RADIATION; SYNCHROTRONS; WATER; Accelerators,OTHER
Citation Formats
Marshall, S.R., /F.W. Olin Eng. Coll., Scott, B., and /SLAC. Analysis of Old Copper Synchrotron Light Absorbers from the Stanford Positron Electron Accelerating Ring. United States: N. p., 2005.
Web. doi:10.2172/877470.
Marshall, S.R., /F.W. Olin Eng. Coll., Scott, B., & /SLAC. Analysis of Old Copper Synchrotron Light Absorbers from the Stanford Positron Electron Accelerating Ring. United States. doi:10.2172/877470.
Marshall, S.R., /F.W. Olin Eng. Coll., Scott, B., and /SLAC. Thu .
"Analysis of Old Copper Synchrotron Light Absorbers from the Stanford Positron Electron Accelerating Ring". United States.
doi:10.2172/877470. https://www.osti.gov/servlets/purl/877470.
@article{osti_877470,
title = {Analysis of Old Copper Synchrotron Light Absorbers from the Stanford Positron Electron Accelerating Ring},
author = {Marshall, S.R. and /F.W. Olin Eng. Coll. and Scott, B. and /SLAC},
abstractNote = {Synchrotron light absorbers intercept synchrotron radiation to protect chamber walls from excessive heat. When subjected to the high temperature of the beam, these absorbers undergo thermal stress. If the stress is too great or fatigues the material, the absorbers may fail. These absorbers are designed to last the lifetime of the machine. Any premature cracking could result in a leak and, consequently, loss of the ultra high vacuum environment. Using secondary and backscattered electron techniques, several sections of a used copper absorber were analyzed for material damage. Chemical analyses were performed on these samples as well. Comparing the unexposed sections to the sections exposed to the electron beam, few cracks were seen in the copper. However, the exposed samples showed heavy surface damage, in addition to crevices that could eventually result in material failure. Significant corrosion was also evident along the water cooling passage of the samples. These findings suggest that further investigation and periodic inspection of absorbers in SPEAR3 are necessary to control corrosion of the copper.},
doi = {10.2172/877470},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Dec 15 00:00:00 EST 2005},
month = {Thu Dec 15 00:00:00 EST 2005}
}
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A final environmental statement is given which was prepared in compliance with the National Environmental Policy Act to support the Energy Research and Development Administration project to design and construct the positron-electron colliding beam storage ring (PEP) facilities at the Stanford Linear Accelerator Center (SLAC). The PEP storage ring will be constructed underground adjacent to the existing two-mile long SLAC particle accelerator to utilize its beam. The ring will be about 700 meters in diameter, buried at depths of 20 to 100 feet, and located at the eastern extremity of the SLAC site. Positron and electron beams will collide inmore »
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(Study of electron-positron interactions at the Stanford Linear Accelerator Center)
This report briefly discusses experiments on the TPC and SLD projects dealing with electron-positron interactions. (LSP) -
[Experiment studies of electron-positron interactions at the Stanford Linear Accelerator Center]. Progress report, calendar year 1993
The High Energy Physics group at the University of Massachusetts has continued its` program of experimental studies of electron-positron interactions at the Stanford Linear Accelerator Center (SLAC). The group activities have included: analysis of data taken between 1982 and 1990 with the TPC detector at the PEP facility, continuing data collection and data analysis using the SLC/SLD facility, planning for the newly approved B-factory at SLAC, and participation in design studies for future high energy linear colliders. This report will briefly summarize these activities.