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Practical sublimation source for large-scale chromium gettering in fusion devices

Abstract

This paper describe the fabrication and testing of a large-scale chromium sublimation source that resembles the VARIAN Ti-ballsup(TM) in its design. The device consists of a hollow chromium sphere with a diameter of approximately 3 cm and an incandescent filament for radiation heating from inside the ball. We also discuss the gettering technique utilizing this source. The experimental arrangement consists of an ultrahigh vacuum (UHV) system instrumented for total and partial pressure measurements, a film thickness monitor, thermocouples, an optical pyrometer, and appropriate instrumentation to measure the heating power. The results show the temperature and corresponding sublimation rate of the Cr-ball as functions of input power. In addition, an example of the total pumping speed of a gettered surface is shown.
Authors:
Simpkins, J E; Gabbard, W A; Emerson, L C; Mioduszewski, P K [1] 
  1. Oak Ridge National Lab., TN (USA)
Publication Date:
May 01, 1984
Product Type:
Conference
Report Number:
CONF-830942-
Reference Number:
AIX-16-008323; EDB-85-051170
Resource Relation:
Journal Name: J. Nucl. Mater.; (Netherlands); Journal Volume: 123:1-3; Conference: 3. topical meeting on fusion reactor materials, Albuquerque, NM, USA, 19 Sep 1983
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; CHROMIUM; GETTERING; SUBLIMATION; THERMONUCLEAR DEVICES; GETTERS; DESIGN; ELECTRIC POWER; FABRICATION; LABORATORY EQUIPMENT; RADIATION HEATING; SPHERES; TEMPERATURE DEPENDENCE; TESTING; TITANIUM; VACUUM SYSTEMS; VAPOR PRESSURE; ELEMENTS; EQUIPMENT; EVAPORATION; HEATING; METALS; PHASE TRANSFORMATIONS; PHYSICAL PROPERTIES; POWER; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENTS; 700209* - Fusion Power Plant Technology- Component Development & Materials Testing; 700201 - Fusion Power Plant Technology- Blanket Engineering
OSTI ID:
6084396
Country of Origin:
Netherlands
Language:
English
Contract Number:
W-7405-ENG-26
Other Identifying Numbers:
Journal ID: CODEN: JNUMA
Submitting Site:
HEDB
Size:
Pages: 1481-1485
Announcement Date:

Citation Formats

Simpkins, J E, Gabbard, W A, Emerson, L C, and Mioduszewski, P K. Practical sublimation source for large-scale chromium gettering in fusion devices. Netherlands: N. p., 1984. Web.
Simpkins, J E, Gabbard, W A, Emerson, L C, & Mioduszewski, P K. Practical sublimation source for large-scale chromium gettering in fusion devices. Netherlands.
Simpkins, J E, Gabbard, W A, Emerson, L C, and Mioduszewski, P K. 1984. "Practical sublimation source for large-scale chromium gettering in fusion devices." Netherlands.
@misc{etde_6084396,
title = {Practical sublimation source for large-scale chromium gettering in fusion devices}
author = {Simpkins, J E, Gabbard, W A, Emerson, L C, and Mioduszewski, P K}
abstractNote = {This paper describe the fabrication and testing of a large-scale chromium sublimation source that resembles the VARIAN Ti-ballsup(TM) in its design. The device consists of a hollow chromium sphere with a diameter of approximately 3 cm and an incandescent filament for radiation heating from inside the ball. We also discuss the gettering technique utilizing this source. The experimental arrangement consists of an ultrahigh vacuum (UHV) system instrumented for total and partial pressure measurements, a film thickness monitor, thermocouples, an optical pyrometer, and appropriate instrumentation to measure the heating power. The results show the temperature and corresponding sublimation rate of the Cr-ball as functions of input power. In addition, an example of the total pumping speed of a gettered surface is shown.}
journal = {J. Nucl. Mater.; (Netherlands)}
volume = {123:1-3}
place = {Netherlands}
year = {1984}
month = {May}
}