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Title: The PEP-II Movable Collimators

Abstract

Three movable collimators have been manufactured for installation in the PEP-II LER and HER beamlines upstream of BaBar to improve backgrounds in BaBar by a factor of 2. Each collimator has a pair of horizontally opposed, water cooled jaws with RF finger seals all around the edge of the jaws, these seals are the only sliding parts inside the vacuum chamber. Each jaw travels independently through a distance of 16.5 mm (LER) or 21mm (HER) and is supported above the collimator from motorized slideways with position feedback. The larger HER collimator has a titanium sublimation pump incorporated into the underside of the collimator, pumping through RF screens in the bottom of the chamber. Water cooled fixed ramps protect the leading and trailing edges of the jaws.

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Stanford Linear Accelerator Center (SLAC)
Sponsoring Org.:
USDOE
OSTI Identifier:
877438
Report Number(s):
SLAC-PUB-11752
TRN: US0601468
DOE Contract Number:  
AC02-76SF00515
Resource Type:
Conference
Resource Relation:
Conference: Prepared for 18th International Conference on High-Energy Accelerators (HEACC 2001), Tsukuba, Japan, 26-30 Mar 2001
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ACCELERATORS; COLLIMATORS; FEEDBACK; FINGERS; PUMPING; SCREENS; SUBLIMATION; TITANIUM; WATER; Accelerators,ACCPHY

Citation Formats

DeBarger, S., Metcalfe, S., Ng, C., Porter, T.G., Seeman, J., Sullivan, M., Wienands, U., and /SLAC. The PEP-II Movable Collimators. United States: N. p., 2006. Web.
DeBarger, S., Metcalfe, S., Ng, C., Porter, T.G., Seeman, J., Sullivan, M., Wienands, U., & /SLAC. The PEP-II Movable Collimators. United States.
DeBarger, S., Metcalfe, S., Ng, C., Porter, T.G., Seeman, J., Sullivan, M., Wienands, U., and /SLAC. Mon . "The PEP-II Movable Collimators". United States. doi:. https://www.osti.gov/servlets/purl/877438.
@article{osti_877438,
title = {The PEP-II Movable Collimators},
author = {DeBarger, S. and Metcalfe, S. and Ng, C. and Porter, T.G. and Seeman, J. and Sullivan, M. and Wienands, U. and /SLAC},
abstractNote = {Three movable collimators have been manufactured for installation in the PEP-II LER and HER beamlines upstream of BaBar to improve backgrounds in BaBar by a factor of 2. Each collimator has a pair of horizontally opposed, water cooled jaws with RF finger seals all around the edge of the jaws, these seals are the only sliding parts inside the vacuum chamber. Each jaw travels independently through a distance of 16.5 mm (LER) or 21mm (HER) and is supported above the collimator from motorized slideways with position feedback. The larger HER collimator has a titanium sublimation pump incorporated into the underside of the collimator, pumping through RF screens in the bottom of the chamber. Water cooled fixed ramps protect the leading and trailing edges of the jaws.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Mar 13 00:00:00 EST 2006},
month = {Mon Mar 13 00:00:00 EST 2006}
}

Conference:
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