Quality Assurance for CCE Tests at Multiple International Sites
This document outlines the quality assurance procedures for CCE tests conducted on behalf of groups from Birmingham, Ljubljana, Tsukuba, Toronto, and Valencia during the ITK week in February 2020. It covers site verifications, irradiation and test sites, testing procedures, fluence measurements, and site verification setups. The instructions emphasize careful measurement verification and proper normalization procedures for accurate results. The document also addresses the distribution of sensors for testing and the importance of precise calibration with capacitors.
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QA site verification for CCE tests on behalf of groups from Birmingham, Ljubljana, Tsukuba, Toronto, Valencia ITK week February 2020 Vladimir Cindro, Jo ef Stefan Institute
QA Irradiation & Test Sites Mini&MD8 (CCE tests) KEK/Tsukuba 1 irradiation/6 mo 4 batches/mo KEK/Tsukuba: p 4 pieces/mo HPK KEK Birmingham 6 sensors /mo 4 pieces/mo + 6 IV-CV/mo Birmingham: p Toronto 6 sensors/mo 9 batches/mo Ljubljana: n 4 pieces/mo CERN Ljubljana QA 2 pieces/mo Valencia Irradiations to 1.6 1015 neqcm-2 ITK week February 2020 Vladimir Cindro, Jo ef Stefan Institute
QA procedure CCE measured with Alibava setup, irradiated and annealed sensor (80 min at 60 C) measurements scans in 100 V steps up to 700 V measurement at -20 C or lower cluster finding procedure defined (3. 5 seed, 1.5 ) in QA document at least 7500 e- signal expected above 500 V careful verification of measurements should be done! R0 results ITK week February 2020 Vladimir Cindro, Jo ef Stefan Institute
1 MeV fluence Neutron fraction of 1 MeV fluence Step 1.5 extended layout and no HGT Neutron fraction in the region with the highest fluence is about 65 % Thanks to Paul Miyagawa ITK week February 2020 Vladimir Cindro, Jo ef Stefan Institute
Site verification all sites should measure the signal of nonirradiated and irradiated sensors from the same batch 20 ATLAS17 LS minisensors from March 2019 10 sensors irradiated with neutrons to 1.6 1015 neq common annealing 80 min at 60 C before measurements distributed to QA labs together with nonirradiated sensors ITK week February 2020 Vladimir Cindro, Jo ef Stefan Institute
Site verification setups were built in the past more than 10 years ago they have different cooling (Peltier, gas) , collimation, trigger , Alibava boards agreement on normalization procedure of setups calibration with capacitors is not precise measure signal of nonirradiated sensor and normalize it to 23050 e- above FDV for 295 microns of the active thickness correct chip gain due to the temperature dependence if needed use this gain for irradiated sensor ITK week February 2020 Vladimir Cindro, Jo ef Stefan Institute
labs share on CERNBOX voltage scans of CCE, I/V spectra with fit cluster widths noise geometry We started with the exchange of data a week ago, some data are not complete yet or need small corrections (Birmingham, Toronto). We are still discussing details of analysis . ITK week February 2020 Vladimir Cindro, Jo ef Stefan Institute
Spectra irradiated sensor 500V Ljubljana Valencia Birmingham Toronto ITK week February 2020 Vladimir Cindro, Jo ef Stefan Institute
Voltage scan of CCE ITK week February 2020 Vladimir Cindro, Jo ef Stefan Institute
Summary excellent agreement of CCE values at 500 V ITK week February 2020 Vladimir Cindro, Jo ef Stefan Institute
Conclusion although setups are different there is excellent agreement (few %) of measured CCE at 500 V fluence variation (10 %) will add uncertainty will learn more (=improve statistic) during the preproduction mixed p/n irradiations (not for QA)? ITK week February 2020 Vladimir Cindro, Jo ef Stefan Institute
