Development of a CdTe spectro-imaging for space application

This manuscript details the work in the scope of a hard X-Ray spatial instrumentation project. Previous developments have reached the design and fabrication of a Cadmium Telluride detector (CdTe) allowing precise photoelectric conversion of light in the hard X-Ray energy range (1keV – 100 keV).This thesis describes all of the design steps of a charge conversion integrated circuit with several specificities: a good spectral resolution, a good spatial resolution, and a four-side abutability.This work organizes through three principal steps. The technology choice for integrated circuit fabrication. The design, fabrication and test of prototypes dedicated to develop the circuit architecture. In addition, the design and test of the final circuit named IDeF-X D2R2. This circuit of 8.5 mm x 8.5 mm, contains 1024 pixels matrix of 32 x 32) of 250 x 250 µm² each of one allowing charge measurement with a low noise of 40 electrons, a dynamic up to 110 000 electrons (500 keV CdTe), for a nominal power consumption of 200 µW/pixel. A system approach has been done to be compatible to a 32 channels analog to digital converter developed prior to the thesis named OWB-1 leading to a digital output spectro-imaging system. Developments and results are promising for the conception of modular detection plan for future spatial missions in the hard X-Ray energy range, allowing study of energetic celestial objects.