Research and Development of silicon semiconductor detector technologies for measuring momentum in very high radiation environments

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Technologies for highly radiation tolerant p-type silicon semiconductor position measuring detectors are established. Silicon microstrip sensors were evaluated up to a flunece of 10**15 1-MeV neutrons-equivalent (neq)/cm**2 and pixel sensors to 10**16. Irradiation dependence of various structures and charge collection were demonstrated. Optimization of structures in detail with hot electron analyses and TCAD simulation achieved holding 1 kV bias voltage before irradiation. New, high-density, high-thermal conductivity and light-weight hybrids were fabricated and double-side modules were constructed and thermal and electrical performance was evaluated.