skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Secondary Electron Emission Yields from PEP-II Accelerator Materials

Abstract

The PEP-II B-Factory at SLAC operates with aluminum alloy and copper vacuum chambers, having design positron and electron beam currents of 2 and 1 A, respectively. Titanium nitride coating of the aluminum vacuum chamber in the arcs of the positron ring is needed in order to reduce undesirable electron-cloud effects. The total secondary electron emission yield of TiN-coated aluminum alloy has been measured after samples of beam chamber material were exposed to air and again after electron-beam bombardment, as a function of incident electron beam angle and energy. The results may be used to simulate and better understand electron-cloud effects under actual operating conditions. We also present yield measurements for other accelerator materials because new surface effects are expected to arise as beam currents increase. Copper, in particular, is growing in popularity for its good thermal conductivity and self-radiation-shielding properties. The effect of electron bombardment, ''conditioning'', on the yield of TiN and copper is shown.

Authors:
Publication Date:
Research Org.:
Stanford Linear Accelerator Center, Menlo Park, CA (US)
Sponsoring Org.:
USDOE Office of Energy Research (ER) (US)
OSTI Identifier:
784708
Report Number(s):
SLAC-PUB-8212
TRN: US0108529
DOE Contract Number:  
AC03-76SF00515
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 9 Oct 2000
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; 36 MATERIALS SCIENCE; PEP STORAGE RINGS; ACCELERATORS; ALUMINIUM ALLOYS; BEAM CURRENTS; COATINGS; COPPER; ELECTRON BEAMS; ELECTRON EMISSION; POSITRON BEAMS; THERMAL CONDUCTIVITY; TITANIUM NITRIDES; SELF-SHIELDING; YIELDS

Citation Formats

Kirby, Robert E. Secondary Electron Emission Yields from PEP-II Accelerator Materials. United States: N. p., 2000. Web. doi:10.2172/784708.
Kirby, Robert E. Secondary Electron Emission Yields from PEP-II Accelerator Materials. United States. doi:10.2172/784708.
Kirby, Robert E. Mon . "Secondary Electron Emission Yields from PEP-II Accelerator Materials". United States. doi:10.2172/784708. https://www.osti.gov/servlets/purl/784708.
@article{osti_784708,
title = {Secondary Electron Emission Yields from PEP-II Accelerator Materials},
author = {Kirby, Robert E.},
abstractNote = {The PEP-II B-Factory at SLAC operates with aluminum alloy and copper vacuum chambers, having design positron and electron beam currents of 2 and 1 A, respectively. Titanium nitride coating of the aluminum vacuum chamber in the arcs of the positron ring is needed in order to reduce undesirable electron-cloud effects. The total secondary electron emission yield of TiN-coated aluminum alloy has been measured after samples of beam chamber material were exposed to air and again after electron-beam bombardment, as a function of incident electron beam angle and energy. The results may be used to simulate and better understand electron-cloud effects under actual operating conditions. We also present yield measurements for other accelerator materials because new surface effects are expected to arise as beam currents increase. Copper, in particular, is growing in popularity for its good thermal conductivity and self-radiation-shielding properties. The effect of electron bombardment, ''conditioning'', on the yield of TiN and copper is shown.},
doi = {10.2172/784708},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Oct 09 00:00:00 EDT 2000},
month = {Mon Oct 09 00:00:00 EDT 2000}
}

Technical Report:

Save / Share: