Science Seminars

10/2/2014 Seminar – Development and in-orbit testing of an X-ray detector on BeEagleSAT, a 2U CubeSat

Speaker: Emrah Kalemci (Sabanci University, Turkey)
Date: Sunday, Oct 02, 2022
Time: 4:00pm
Location: SPSC W120

Seminar Abstract:

A CdZnTe based semiconductor X-ray detector (XRD) and its associated readout electronics is developed by the High Energy Astrophysics Detector Laboratory of Sabanci University, and Space Systems Design Laboratory of Istanbul Technical University, along with an SME partner. The detector will utilize 30 orthogonal cross strip electrodes (and 3 steering electrodes in between anodes) whose geometry is optimized by an extensive set of simulations and energy resolution measurements. The signals will be read by RENA 3b ASIC controlled by MSP 430 microcontroller. The system will have its own battery and will be turned on intermittently due to power constraints. The aim of the XRD is to show that large volume crystals with orthogonal strips are viable alternatives, especially for small satellite systems with medium energy resolution requirement. XRD will also characterize the hard X-ray background in 20-200 keV at low Earth orbit conditions as a function of altitude.

The XRD is planned to travel into space, as a secondary science mission, on board BeEagleSat which is a 2U CubeSat developed as one of the possible double (2U) CubeSats for the QB50 project. QB50 is a European Framework 7 (FP7) project carried out by a number of international organizations led by the von Karman Institute of Belgium. Its main scientific objective is to study in situ the temporal and spatial variations of a number of key constituents and parameters in the lower thermosphere with a network of about 50 double and triple CubeSats, separated by few hundred kilometers and carrying a determined set of sensors.

In this presentation, I will describe the X-ray detector, its integration with the BeEagleSat CubeSat, control and data acquisition algorithms and the early mechanical and electrical tests. At this time I will also provide brief information about BeEagleSat and its subsystems. The talk will also include a general overview and the future of nano and micro satellite development efforts in Turkey.