Temperature profile of IR-blocking windows used in cryogenic x-ray spectrometers

Stephan Friedrich; Timothy B. Funk; Owen B. Drury; Simon E. Labov

doi:10.1117/12.409143

13 December 2000 Temperature profile of IR-blocking windows used in cryogenic x-ray spectrometers

Stephan Friedrich, Timothy B. Funk, Owen B. Drury, Simon E. Labov

Proceedings Volume 4140, X-Ray and Gamma-Ray Instrumentation for Astronomy XI; (2000) https://doi.org/10.1117/12.409143
Event: International Symposium on Optical Science and Technology, 2000, San Diego, CA, United States

Abstract

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.

Citation Download Citation

Stephan Friedrich, Timothy B. Funk, Owen B. Drury, and Simon E. Labov "Temperature profile of IR-blocking windows used in cryogenic x-ray spectrometers", Proc. SPIE 4140, X-Ray and Gamma-Ray Instrumentation for Astronomy XI, (13 December 2000); https://doi.org/10.1117/12.409143

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