A mechanical cooler for the spectrometer experiment on board the integral spacecraft

Germanium detector with Stirling cryocooler for lunar gamma-ray spectroscopy

“…The performance of Stirling cryocooler has been improved in respect of power consumption and cooling capacity, and this innovation results in reducing the mechanical vibration. GRSs in recent missions using Ge detectors with Stirling cryocoolers, HESSI spectrometer and INTEGRAL/SPI [14,15], did not show any microphonic effects and have undergone successful observations. They have the performances partly owing to their rigid structures of the instrument in the cryostat, which have nine and nineteen Ge detectors for HESSI spectrometer and INTEGRAL/SPI, respectively.…”