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Title: Fermilab Accumulator Ring Ultra-High Vacuum System

Abstract

An average pressure of 3 x 10{sup -10} Torr is required in order to store a beam of antiprotons (for up to 20 hours) in the Fermilab Accumulator Ring. The Accumulator Ring has a circumference of 474 m and consists of 114 main magnets which surround a continuous, stainless-steel vacuum chamber with a mean diameter of 12 cm. The Accumulator Ring is located in a below-grade tunnel which is inaccessible during normal operation. Consequently, all monitoring and control operations must be done remotely. In this paper the authors describe: (1) the rationale of the Accumulator Ring's vacuum system; (2) the specific choice of pumping systems (roughing, ion and sublimation) that was selected for implementation; (3) the details of the instrumentation, control and backeout systems (300 C) for monitoring the pressure and desorbing the vacuum chamber; and (4) the operating experience and performance of the entire system.

Authors:
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  1. Fermilab
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP)
OSTI Identifier:
984626
Report Number(s):
FERMILAB-PBAR-NOTE-440
oai:inspirehep.net:863457; TRN: US201016%%1538
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ANTIPROTONS; FERMILAB; IMPLEMENTATION; MAGNETS; MONITORING; PERFORMANCE; PUMPING; SUBLIMATION; TANKS; VACUUM SYSTEMS; Accelerators

Citation Formats

Mills, F. E., Bartelson, C., Gormley, M., Klen, J., Lee, G. N., Marriner, J., Misek, J. R., Rathbun, T. D., Satti, J. A., and Sax, W. Fermilab Accumulator Ring Ultra-High Vacuum System. United States: N. p., 1985. Web. doi:10.2172/984626.
Mills, F. E., Bartelson, C., Gormley, M., Klen, J., Lee, G. N., Marriner, J., Misek, J. R., Rathbun, T. D., Satti, J. A., & Sax, W. Fermilab Accumulator Ring Ultra-High Vacuum System. United States. https://doi.org/10.2172/984626
Mills, F. E., Bartelson, C., Gormley, M., Klen, J., Lee, G. N., Marriner, J., Misek, J. R., Rathbun, T. D., Satti, J. A., and Sax, W. 1985. "Fermilab Accumulator Ring Ultra-High Vacuum System". United States. https://doi.org/10.2172/984626. https://www.osti.gov/servlets/purl/984626.
@article{osti_984626,
title = {Fermilab Accumulator Ring Ultra-High Vacuum System},
author = {Mills, F. E. and Bartelson, C. and Gormley, M. and Klen, J. and Lee, G. N. and Marriner, J. and Misek, J. R. and Rathbun, T. D. and Satti, J. A. and Sax, W.},
abstractNote = {An average pressure of 3 x 10{sup -10} Torr is required in order to store a beam of antiprotons (for up to 20 hours) in the Fermilab Accumulator Ring. The Accumulator Ring has a circumference of 474 m and consists of 114 main magnets which surround a continuous, stainless-steel vacuum chamber with a mean diameter of 12 cm. The Accumulator Ring is located in a below-grade tunnel which is inaccessible during normal operation. Consequently, all monitoring and control operations must be done remotely. In this paper the authors describe: (1) the rationale of the Accumulator Ring's vacuum system; (2) the specific choice of pumping systems (roughing, ion and sublimation) that was selected for implementation; (3) the details of the instrumentation, control and backeout systems (300 C) for monitoring the pressure and desorbing the vacuum chamber; and (4) the operating experience and performance of the entire system.},
doi = {10.2172/984626},
url = {https://www.osti.gov/biblio/984626}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 1985},
month = {Tue Jan 01 00:00:00 EST 1985}
}