Recent results on cleaning and conditioning the ATF vacuum system
- Oak Ridge National Laboratory, Oak Ridge, TN 37831-8072 (USA)
Techniques for cleaning and conditioning the vacuum vessel of the Advanced Toroidal Facility (ATF) and its internal components are described. The vacuum vessel cleaning technique combines baking to 150 {degree}C and glow discharges with hydrogen gas. Chromium gettering is used to further condition the system. The major internal components are the anodized aluminum baffles in the Thomson scattering system, a graphite-shielded ICRF antenna, two graphite limiters, and a diagnostic graphite plate. Three independent heating systems are used to bake some of the major components of the system. The major characteristics used for assessing cleanliness and conditioning progress are the maximum pressure attained during bakeout, the results of gas analysis, and revelant plasma parameters (e.g., time to radiative decay). Details of the various cleaning and conditioning procedures and results are presented.
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 7052529
- Report Number(s):
- CONF-8904230--
- Journal Information:
- AIP Conference Proceedings (American Institute of Physics); (USA), Journal Name: AIP Conference Proceedings (American Institute of Physics); (USA) Vol. 199:1; ISSN APCPC; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
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ANTENNAS
ATF TORSATRON
BAFFLES
BAKING
CLEANING
CLOSED PLASMA DEVICES
CONTROL EQUIPMENT
ELECTRIC DISCHARGES
ELECTRICAL EQUIPMENT
ELEMENTS
EQUIPMENT
FLOW REGULATORS
GLOW DISCHARGES
HEATING
HYDROGEN
LIMITERS
NONMETALS
STELLARATORS
SURFACE CLEANING
SURFACE FINISHING
THERMONUCLEAR DEVICES
TORSATRON STELLARATOR
VACUUM SYSTEMS