Temperature Profile of IR Blocking Windows Used in Cryogenic X-Ray Spectrometers
Cryogenic high-resolution X-ray spectrometers are typically operated with thin IR blocking windows to reduce radiative heating of the detector while allowing good x-ray transmission. We have estimated the temperature profile of these IR blocking windows under typical operating conditions. We show that the temperature in the center of the window is raised due to radiation from the higher temperature stages. This can increase the infrared photon flux onto the detector, thereby increasing the IR noise and decreasing the cryostat hold time. The increased window temperature constrains the maximum window size and the number of windows required. We discuss the consequences for IR blocking window design.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE Office of Defense Programs (DP) (US)
- DOE Contract Number:
- W-7405-Eng-48
- OSTI ID:
- 793984
- Report Number(s):
- UCRL-JC-137360; TRN: US0300661
- Resource Relation:
- Journal Volume: 4140; Conference: SPIE Meeting, San Diego, CA (US), 07/30/2000--08/04/2000; Other Information: PBD: 8 Aug 2000
- Country of Publication:
- United States
- Language:
- English
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