16 - 21 June 2024
Yokohama, Japan
Conference 13093 > Paper 13093-51
Paper 13093-51

The performance of RHESSI's germanium detectors over a 16-year science mission

18 June 2024 • 17:10 - 17:30 Japan Standard Time | Room G414/415, North - 4F


The Reuven Ramaty High-Energy Solar Spectroscopic Imager (RHESSI) was a solar X-ray mission that observed the Sun at X-ray and gamma-ray wavelengths for 16 years, with an energy range covering 3 keV – 17 MeV. RHESSI instrumentation consisted of nine cryocooled, segmented, germanium detectors. We report on the performance of these detectors over the course of 16 years of science operations in a mid-latitude, low-Earth orbit environment. We assess the evolution of the energy gain and energy calibration for each detector, the segmentation status of the detectors over time, and the effectiveness of detector annealing in restoring performance. We highlight some of the challenges associated with determining the calibration over such a long on-orbit time period. These results provide valuable context for future X-ray and gamma-ray space missions.


Andrew Inglis
NASA Goddard Space Flight Ctr. (United States)
Dr Inglis is a research scientist in the Heliophysics Division at NASA Goddard Space Flight Center. He focuses on high-energy X-ray and gamma-ray observations of the Sun, with a particular interest in solar flares.
Andrew Inglis
NASA Goddard Space Flight Ctr. (United States)
Albert Shih
NASA Goddard Space Flight Ctr. (United States)