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| Titel |
Selection of new innovation crystal for Mercury Gamma-ray and Neutron Spectrometer on-board MPO/BepiColombo mission. |
| VerfasserIn |
Alexander Kozyrev, Igor Mitrofanov, Johannes Benkhoff, Maxim Litvak, Jonathan McAuliffe, Maxim Mokrousov, Alan Owens, Francesco Quarati, Valery Shvetsov, Gennady Timoshenko |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250107157
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| Publikation (Nr.) |
 EGU/EGU2015-6848.pdf |
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| Zusammenfassung |
| The Mercury Gamma-ray and Neutron Spectrometer (MGNS) was developed in Space
Research Institute for detection the flux of neutron and gamma-ray from the Mercury
subsurface on-board Mercury Polar Orbiter of ESA BepiColombo mission. The
instrument consists of 3He proportional counters and organic scintillator for detection of
neutron and also gamma-spectrometer based on scintillation crystal for detection of
gamma-ray. For the gamma-ray spectrometer the LaBr3 crystal was selected, the best
choice at the time of the instrument proposal in 2004. However, quite recently the
European industry has developed the new crystal CeBr3, which could be much better
than LaBr3 crystal for planetology. Such crystal with the necessary size of 3 inch
became available in the stage of manufactory of Flight Spare Module of MGNS
instrument. New CeBr3 crystal has much better signal-to-noise ratio than LaBr3
crystal in the energy band up to 3 MeV. Also, in the LaBr3 crystal, the important
for planetology gamma-ray line of potassium at 1461 keV is overlapping with the
background gamma-ray line of 138La isotope at 1473 keV. This CeBr3 crystal was
integrated to MGNS instrument. We present the results of gamma-ray performance and
environment tests of MGNS with CeBr3 crystal, and also comparison between
LaBr3 and new CeBr3 crystals in context of space application for this instrument. |
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