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Some technical aspects of testing and adaptation of existing detectors

This paper by Gusev Konstantin from Kurchatov Institute/JINR covers testing, repair methods, risks, and conclusions for detector adaptation. Includes tools needed and estimated timeframes for the process.

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Some technical aspects of testing and adaptation of existing detectors

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  1. Some technical aspects of testing and adaptation of existing detectors Gusev Konstantin, Kurchatov Institute / JINR

  2. Preparation of adaptation consists of: • Testing of existing enriched detectors; • Repairing of detector performance in the actual cryostats, if it will be needed; • Estimation of the risks of crystal repacking procedures and Careful check of all necessary operation with typical non-enriched detectors. Gusev Konstantin, Kurchatov Institute / JINR

  3. TESTING OF EXISTING DETECTORS Gusev Konstantin, Kurchatov Institute / JINR

  4. TESTING OF EXISTING DETECTORS For best realization we need: • Spectrometricchannel with the best performance; • Precision pulse generator; • Model of PA first stage. Gusev Konstantin, Kurchatov Institute / JINR

  5. REPAIRING OF DETECTOR PERFORMANCE For heat and pump procedures we must have: Turbo molecular pump with enough efficiency; Nitrogen traps for elimination of any contaminations of detector; Valve for connecting between pump and detector cryostat; Absolutely clear or new vacuum elements (rings, fillers, etc.); Heater, maybe electric fan (temperature not higher than 150°C). Gusev Konstantin, Kurchatov Institute / JINR

  6. POSSIBLE RISKS • Contamination of detector surface because of too early opening of cryostat. • Damage of implantation layer due to careless dismounting of diode from existing support or packing it into the new holder. • Damage of crystal because of too strong pressure in the new support. • Damage of crystal due to thermal shock. • Damage because of keeping and transportation of naked diodes in non-adequate conditions. • Deterioration of lithium layer after too long staying of detectors at room temperature. Gusev Konstantin, Kurchatov Institute / JINR

  7. Conclusions • Testing of all existing detectors. • Repairing of detector performance inside the actual cryostats. Required time for I and II is about one month at best. • For elimination of estimated risks when we open cryostats: • Special tools for accurate repacking must be ready; • Leak proof box for crystals keeping must be ready too; • All adaptation procedures at non-enriched detectors must be realized. Gusev Konstantin, Kurchatov Institute / JINR

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