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Title: Outgassing measurements of stacked laminations for use as an electromagnet core

Abstract

Outgassing from an electromagnet core installed in an accelerator vacuum system is a problem, since it causes a poor vacuum, thus shortening the beam lifetime while also inducing electrical breakdown. Outgassing measurements by a throughput method were carried out for stacked laminations with a few types of insulating coatings. The vacuum performance does not always depend on a small conductance in a narrow gap spacing of a few micrometers, but on the materials coated for electrical insulation. A high-temperature cured inorganic and plasma-sprayed ceramic coating shows a lower outgassing rate than a quasi-inorganic one by an order or more. An outgassing reduction effect by a prebaking treatment is also examined. Furthermore, a time lag in the pumpdown characteristic of the stacked laminations is discussed.

Authors:
; ;  [1]
  1. KEK-High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305 (Japan)
Publication Date:
OSTI Identifier:
20636588
Resource Type:
Journal Article
Journal Name:
Journal of Vacuum Science and Technology. A, Vacuum, Surfaces and Films
Additional Journal Information:
Journal Volume: 22; Journal Issue: 5; Other Information: DOI: 10.1116/1.1786311; (c) 2004 American Vacuum Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0734-2101
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; BEAMS; CERAMICS; DEGASSING; ELECTRICAL FAULTS; ELECTRICAL INSULATION; ELECTROMAGNETS; LIFETIME; PERFORMANCE; PLASMA; SPRAY COATING; SPRAYED COATINGS; TEMPERATURE RANGE 0400-1000 K; VACUUM SYSTEMS

Citation Formats

Saito, Y, Sato, Y, and Kubo, T. Outgassing measurements of stacked laminations for use as an electromagnet core. United States: N. p., 2004. Web. doi:10.1116/1.1786311.
Saito, Y, Sato, Y, & Kubo, T. Outgassing measurements of stacked laminations for use as an electromagnet core. United States. https://doi.org/10.1116/1.1786311
Saito, Y, Sato, Y, and Kubo, T. 2004. "Outgassing measurements of stacked laminations for use as an electromagnet core". United States. https://doi.org/10.1116/1.1786311.
@article{osti_20636588,
title = {Outgassing measurements of stacked laminations for use as an electromagnet core},
author = {Saito, Y and Sato, Y and Kubo, T},
abstractNote = {Outgassing from an electromagnet core installed in an accelerator vacuum system is a problem, since it causes a poor vacuum, thus shortening the beam lifetime while also inducing electrical breakdown. Outgassing measurements by a throughput method were carried out for stacked laminations with a few types of insulating coatings. The vacuum performance does not always depend on a small conductance in a narrow gap spacing of a few micrometers, but on the materials coated for electrical insulation. A high-temperature cured inorganic and plasma-sprayed ceramic coating shows a lower outgassing rate than a quasi-inorganic one by an order or more. An outgassing reduction effect by a prebaking treatment is also examined. Furthermore, a time lag in the pumpdown characteristic of the stacked laminations is discussed.},
doi = {10.1116/1.1786311},
url = {https://www.osti.gov/biblio/20636588}, journal = {Journal of Vacuum Science and Technology. A, Vacuum, Surfaces and Films},
issn = {0734-2101},
number = 5,
volume = 22,
place = {United States},
year = {Wed Sep 01 00:00:00 EDT 2004},
month = {Wed Sep 01 00:00:00 EDT 2004}
}