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Title: Boron nitride protective coating of beryllium window surfaces

Abstract

The use of beryllium windows on white synchrotron radiation beamlines is constrained by the fact that the downstream surfaces of these windows should not be exposed to ambient atmosphere. They should, rather, be protected by a tail-piece under vacuum or containing helium atmosphere. This tailpiece is typically capped by Kapton (3M Corporation, St. Paul, MN) or aluminum foil. The reason for such an arrangement is due to the health risk associated with contaminants (BeO) which from on the exposed beryllium window surfaces and due to possible loss of integrity of the windows. Such a tail-piece may, however, add unwanted complications to the beamline in the form of vacuum pumps or helium supplies and their related monitoring systems. The Kapton windows may burn through in the case of high intensity beams and lower energy radiation may be absorbed in the case of aluminum foil windows. A more ideal situation would be to provide a coating for the exposed beryllium window surface, sealing it off from the atmosphere, thus preventing contamination and/or degradation of the window, and eliminating the need for helium or vacuum equipment.

Authors:
Publication Date:
Research Org.:
Brookhaven National Lab., Upton, NY (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
10121376
Report Number(s):
BNL-46597; CONF-9110146-12
ON: DE92007632
DOE Contract Number:
AC02-76CH00016
Resource Type:
Conference
Resource Relation:
Conference: 7. national conference and exhibition on synchrotron radiation instrumentation,Baton Rouge, LA (United States),28-31 Oct 1991; Other Information: PBD: Dec 1991
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; 36 MATERIALS SCIENCE; WINDOWS; PROTECTIVE COATINGS; SYNCHROTRON RADIATION SOURCES; BORON NITRIDES; BERYLLIUM; SURFACES; SPRAY COATING; BEAM TRANSPORT; 430303; 360601; EXPERIMENTAL FACILITIES AND EQUIPMENT; PREPARATION AND MANUFACTURE

Citation Formats

Gmuer, N.F. Boron nitride protective coating of beryllium window surfaces. United States: N. p., 1991. Web.
Gmuer, N.F. Boron nitride protective coating of beryllium window surfaces. United States.
Gmuer, N.F. Sun . "Boron nitride protective coating of beryllium window surfaces". United States. doi:. https://www.osti.gov/servlets/purl/10121376.
@article{osti_10121376,
title = {Boron nitride protective coating of beryllium window surfaces},
author = {Gmuer, N.F.},
abstractNote = {The use of beryllium windows on white synchrotron radiation beamlines is constrained by the fact that the downstream surfaces of these windows should not be exposed to ambient atmosphere. They should, rather, be protected by a tail-piece under vacuum or containing helium atmosphere. This tailpiece is typically capped by Kapton (3M Corporation, St. Paul, MN) or aluminum foil. The reason for such an arrangement is due to the health risk associated with contaminants (BeO) which from on the exposed beryllium window surfaces and due to possible loss of integrity of the windows. Such a tail-piece may, however, add unwanted complications to the beamline in the form of vacuum pumps or helium supplies and their related monitoring systems. The Kapton windows may burn through in the case of high intensity beams and lower energy radiation may be absorbed in the case of aluminum foil windows. A more ideal situation would be to provide a coating for the exposed beryllium window surface, sealing it off from the atmosphere, thus preventing contamination and/or degradation of the window, and eliminating the need for helium or vacuum equipment.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Dec 01 00:00:00 EST 1991},
month = {Sun Dec 01 00:00:00 EST 1991}
}

Conference:
Other availability
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