Block for X-ray and gamma-radiation detection

The device is intended for monitoring and locating of gamma-sources at the celectial vault within the gamma-range and for the development of the trigger signal for the ShOK wide-angle optic cameras.

What’s an idea of the measurement method?

Three complexes of scientific equipment onboard “Lomonosov” satellite will provide multi-wave measurements of gamma-bursts, which are necessary for the studies of the nature of these astrophysical sources. These complexes are BDRG, ShOK and UFFO providing gamma-bursts’ measurements within optics, gamma, X-ray and UV-ranges of electromagnetic spectrum.

Besides, BDRG provides:

  • monitoring of the transient astrophysical phenomena  (“X-ray novas”, “Gamma-repeators”, etc.)
  • timing of soft gamma-radiation of the X-ray double stars and pulsars.
  • patrol of the solar radiation within the gamma-range.

Three identical gamma-detectors will be mounted onboard the satellite.

Energy range, MeV 0.01 – 3.0
Cross section (for three detectors), sm2 ~360
Time resolution, mks 100 (for the flash mode)
Mass (for one module), kg ~7
Power supply, W ~7.5
Information capacity, MByte/day ~300
Field of view 2*pi*ster
Field of effective source locating pi/2*ster
Source sensitivity, erg/sm2 ~10-7
Accuracy of source locating, degree ~1-3
Expected number of the observed souces per year ~100

Scientific problems