Peltier cooled lithium-drifted silicon x-ray spectrometer

Details Peltier cooled lithium-drifted silicon x-ray spectrometer Peltier cooled lithium-drifted silicon x-ray spectrometer

1990-08-10

1991-12-24

Fields, Carolyn E.

Radiant energy

Invisible radiant energy responsive electric signalling

Semiconductor system

25037006, 250352, 62 511, G01T 124, G01T 140

Patent

active

050755552

ABSTRACT:
For use as a substitute for liquid nitrogen cooled energy dispersive x-ray detection in spectrometry, the present invention comprises a cooper cold-finger having a lithium-drifted silicon detector and FET at one end, and a five-stage Peltier cooling stack thermally connected to the fifth stage through copper braid at the other end, an aluminum heat shield surrounding the cold-finger and thermally connected to the fourth stage of the Peltier cooling stack with a copper braid, a plurality of nylon spiders that support the cold finger within the heat shield and isolate them thermally, a stainless steel cap, a plurality of nylon spiders that support the heat shield within the cap and thermally isolates them, a heat sink in thermal communication with the hot end of the cooling stack, a remote water cooling system piped to the heat sink and mechanically isolated from vibrating the silicon detector, an ion pump to create a high-quality vacuum around the silicon detector, a motor drive to adjust the reach of the silicon detector assembly, a heat sensor, and a tip proximity sensor.

REFERENCES:
patent: 4230945 (1980-10-01), Meir et al.
patent: 4361011 (1982-11-01), Callender et al.
patent: 4587563 (1986-05-01), Bendell et al.
patent: 4931650 (1990-06-01), Lowe et al.
patent: 4933557 (1990-06-01), Perkins et al.

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