Neutral beam interlock system on TFTR using infrared pyrometry

Technical Report · Sun Jun 01 04:00:00 EDT 1986

DOI:https://doi.org/10.2172/5481272· OSTI ID:5481272

Medley, S S; Kugel, H W; Kozub, T A; Lowrance, J L; Mastrocola, V; Renda, G; Young, K M

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/cm/sup 2/ 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.

• Research Organization: Princeton Univ., NJ (USA). Plasma Physics Lab.
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 5481272
• Report Number(s): PPPL-2334; ON: DE86013633
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700209* -- Fusion Power Plant Technology-- Component Development & Materials Testing
BEAM INJECTION
CARBIDES
CARBON
CARBON COMPOUNDS
CONTAINERS
ELECTROMAGNETIC RADIATION
ELEMENTAL MINERALS
ELEMENTS
FIBER OPTICS
FIRST WALL
GRAPHITE
INFRARED RADIATION
MEASURING INSTRUMENTS
MINERALS
NEUTRAL ATOM BEAM INJECTION
NONMETALS
PRESSURE VESSELS
PYROMETERS
RADIATIONS
TFTR TOKAMAK
THERMONUCLEAR REACTOR WALLS
THERMONUCLEAR REACTORS
TITANIUM CARBIDES
TITANIUM COMPOUNDS
TOKAMAK TYPE REACTORS
TRANSITION ELEMENT COMPOUNDS