Patent US4061939A successfully refreshed from Google Patents.
Patent US4716742A successfully refreshed from Google Patents.
US4716742A
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Cryogenic system for radiation detectors
Assignee: S A T (SOCIETE ANONYME DE TELECOMMUNICATIONS) 41 RUE CANTAGREL 75631 PARIS CEDEX 13 (FRANCE)
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Filing: 1985-09-26
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Granted: 1988-01-05
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Expires: 2005-09-26
Abstract
Abstract A cryogenic device for radiation detectors is provided comprising an enclosure situated between a cryogenic cold finger supporting a detector and an external wall. After a brief degasification under vacuum of said enclosure, at least one gas is therein introduced, whose liquefaction or solidification temperature is higher than the temperature reached by said cold finger.
Inventors
- 👤 Michel M. E. Germain-Lacour
- 👤 Joseph M. A. Loiseau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:44
CPC Classifications
F; F25; F25D; F25D3/00; F17; F17C; F17C3/00; F17C3/02; F17C3/08; F17C3/085; F25D3/10; G; G01; G01J; G01J5/00; G01J5/02; G01J5/06; G01J5/061; F25D16/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
98 words
A cryogenic device for radiation detector comprising: a finger cooled to a low temperature and adapted for supporting and cooling said detector, a wall surrounding said finger having, opposite said detector, a window transparent to the radiation to be detected and in which the enclosure defined by said finger and said wall is closed and filled with at least a gas, said gas, as well as its pressure in the enclosure, being chosen so that said gas has a low thermal conductivity and so that its liquefaction or solidification temperature is higher than that reached by said finger.
Claim 2
Dependent Claim
98 words
A cryogenic device for radiation detector comprising: a finger cooled to a low temperature and adapted for supporting and cooling said detector, a wall surrounding said finger having, opposite said detector, a window transparent to the radiation to be detected and in which the enclosure defined by said finger and said wall is closed and filled with at least a gas, said gas, as well as its pressure in the enclosure, being chosen so that said gas has a low thermal conductivity and so that its liquefaction or solidification temperature is higher than that reached by said finger.
Claim 3
Dependent Claim
29 words
The device as claimed in claim 1, wherein said gas is chosen from the following: xenon, krypton, argon, nitrogen, carbon dioxide, nitrogen protoxide and a mixture of these gases.
Claim 4
Independent Claim
48 words
The device as claimed in any one of claims 1 and 2 including a cooling jacket surrounding said wall, and wherein a refrigerating fluid is used to a cool said finger and wherein said finger defines an outlet for the passage of refrigerating fluid to the cooling jacket.
References Cited (Backward Citations)
US3258602A
Cited
US3170306A
Cited
US3306058A
Cited
US3356846A
Cited
FR1529857A
Cited
US3593537A
Cited
US3970851A
Cited
US4487037A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-01-04 | 1991-07-06 | 1992-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-04 | 1995-07-06 | 1996-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-04 | 1999-07-06 | 2000-01-05 | $7700.00 | Window Closed / Lapsed |