Summary
Soft X-ray Spectrometer (SXS) onboard ASTRO-H (named Hitomi after launch) is a microcalorimeter-type spectrometer, installed in a dewar to be cooled at 50 mK. The energy resolution of the SXS engineering model suffered from micro-vibration from cryocoolers mounted on the dewar. This is mitigated for the flight model by introducing vibration isolation systems between the cryocoolers and the dewar. The detector performance of the flight model was verified before launch of the spacecraft in both ambient condition and thermal-vac condition, showing no detectable degradation in energy resolution. The in-orbit performance was also consistent with that on ground, indicating that the cryocoolers were not damaged by launch environment. The design and performance of the vibration isolation system al
UK applicability
This is a highly specialised space-based instrumentation paper with no direct relevance to UK farming systems, soil health, or food production research.
Key measures
Energy resolution of the SXS detector; micro-vibration amplitude; detector performance under ambient, thermal-vacuum, and in-orbit conditions
Outcomes reported
The study evaluated how vibration isolation systems mitigate micro-vibration degradation of a cryogenic microcalorimeter detector cooled to 50 mK. Energy resolution performance was verified across ambient, thermal-vacuum, and in-orbit conditions.
Topic tags
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