Email RIS file
Bookmark
Report an Issue

Neutral beam interlock system on TFTR using infrared pyrometry

Author
Medley, S. S.
Published
United States : [publisher not identified], 1986
Springfield, Va.: National Technical Information Service, [approximately 1986]
Physical Description
microfiche : negative ; 11 x 15 cm
Additional Creators
Kozub, T. A., Kugel, H. W., Lowrance, J. L., Mastrocola, V., Renda, G., and Young, K. M.

Availability

Browse Nearby on Shelf
I Want It
I Want It

Finding items...

Summary
Although the region of the TFTR vacuum vessel wall which is susceptible to damage by neutral beam strike is armored with a mosaic of TiC-clad POCO graphite titles, at power deposition levels above 2.5 kW/cm2 the armor surface temperature exceeds 1200/sup 0/C within 250 ms and itself becomes susceptible to damage. In order to protect the wall armor, a neutral beam interlock system based on infrared pyrometry measurement of the armor surface temperature was installed on TFTR. For each beamline, a three-fiber-optic telescope views three areas of approx.30 cm diameter centered on the armor hot spots for the three ion sources. Each signal is fiber-optic coupled to a remote 900 nm pyrometer which feeds analog signals to the neutral beam interrupt circuits. The pyrometer interlock system is designed to interrupt each of the twelve ion sources independently within 10 ms of the temperature exceeding a threshold settable in the range of 500 to 2300/sup 0/C. A description of the pyrometer interlock system and its performance will be presented.
Report Numbers
DE86013633; PPPL-2334
Other Subject(s)
Collection
NTIS collection.
Note
DOE contract number: AC02-76CH03073
OSTI Identifier 5481272
Research organization: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States).
View MARC record | catkey: 47367054