Kjetil Ullaland

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1 Department of Physics, University of Bergen, Allegaten 55, N-5007 Bergen, Norway 2 Bergen University College, Postbox 7030, N-5020 Bergen, Norway 3 Kirchhoff Institut für Physik, Im Neuenheimer Feld 227, D-69120 Heidelberg, Germany 4 Institut für Kernphysik Frankfurt, August-Euler-Str. 6, D-60486 Frankfurt am Main, Germany and 5 Department of Physics,(More)
The XA is an application specific integrated circuit (ASIC) for gammaand X-ray energy spectroscopy. The circuit was designed to read signals from semiconductor radiation sensors such as cadmium zinc telluride (CZT) or cadmium telluride (CdTe). The assembly of CZT sensors with XA-ASICs allows one to measure energies of gammaand X-rays in the range from 20(More)
In this article we introduce the low-energy CZT (CdZnTe) 16 384-pixel detector array on-board the Atmosphere Space Interaction Monitor (ASIM), funded by the European Space Agency. This detector is a part of the larger Modular Xand Gamma-ray sensor (MXGS). The CZT detector array is sensitive to photons with energies between 15 keV and 400 keV. The principal(More)
This paper presents the Bismuth Germanate Oxide (BGO) front-end electronics design and signal processing in Modular Xand Gamma ray sensor (MXGS) instrument onboard the Atmosphere Space Interaction Monitor (ASIM) mission, funded by the European Space Agency. University of Bergen is responsible for the design and development of the detector layers and readout(More)
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