Ground calibration of the Chandrayaan-1 X-ray Solar Monitor (XSM)
Alha, L. and Huovelin, J. and Nygard, K. and Andersson, H. and Esko, E. and Howe, C.J. and Kellett, B.J. and Narendranath, S. and Maddison, B.J. and Crawford, Ian and Grande, M. and Shreekumar, P. (2009) Ground calibration of the Chandrayaan-1 X-ray Solar Monitor (XSM). Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 607 (3), pp. 544-553. ISSN 0168-9002.
The Chandrayaan-1 XSM ground calibrations are introduced. The aim of these calibrations was to characterize the performance of XSM, which enables a reliable spectral analysis with the solar X-ray data. The calibrations followed an improved procedure based on our experience from the SMART-1 XSM. The most important tasks in the calibrations were determination of the energy resolution as a function of the photon energy and mapping of the detector sensitivity over the FoV (Field of View) of the sensor. The FoV map was needed to determine the obscuration factor corresponding to various pointings with respect to the Sun. We made also a sensitivity comparison test between the Chandrayaan-1 XSM FM (Flight Model) and SMART-1 XSM FS (Flight Spare). The aim of this test was to link the new XSM performance to a performance of an already known and tested former instrument. We also performed a simple test to determine the pile up performance, and one specific test tailored for the operation of the new version of XSM. Also the first experiences on the in-flight operation are briefly described.
|Keyword(s) / Subject(s):||X-ray detectors, calibration|
|School:||Birkbeck Schools and Departments > School of Science > Earth and Planetary Sciences|
|Date Deposited:||09 Feb 2011 15:15|
|Last Modified:||08 Jun 2016 09:40|
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