Energy-dispersive X-ray detector and method of evacuating same

Details Energy-dispersive X-ray detector and method of evacuating same Energy-dispersive X-ray detector and method of evacuating same

1992-12-08

1994-06-28

Anderson, Bruce C.

Radiant energy

Invisible radiant energy responsive electric signalling

Semiconductor system

62 555, 250310, G01T 124, H01J 3726

Patent

active

053249470

ABSTRACT:
An energy-dispersive x-ray detector designed so that the space accommodating an x-ray detector device can be evacuated well and efficiently. When the detector device is not in use, a control portion stops the operation of a compressor and the operation of a refrigerator. Then, the temperature of an adsorbent rises. Gas which has been once adsorbed is released into the space, thus deteriorating the degree of vacuum. If the x-ray detector is instructed to operate via a console portion, the control portion operates a vacuum pump and opens an exhaust valve to evacuate the inside of the space. When the output signal from a vacuum gauge indicates that the degree of vacuum inside the space has reached a given level, the control portion closes the exhaust valve, stops the operation of the vacuum pump, and starts the operation of the compressor. As a result, the adsorbent is cooled. Then, the inside of the space is maintained at a desired degree of vacuum.

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patent: 5212953 (1993-05-01), Kawaguchi et al.
David D. Cohen, X-Ray Spectrometry, vol. 16, pp. 237-241 (1987), "Ice Thickness and Low-Energy Si(Li) Detector Efficiency Measurements".

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