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“Weirdness” in collected charge and additional irradiation plans

“Weirdness” in collected charge and additional irradiation plans. Anthony Affolder University of Liverpool. Weirdness in C ollected Charge. +5-10%. +30-35%. “Normal” Annealing. +5-10%. “Weird” Annealing. ATLAS12 neutron and proton irradiated devices anneal differently

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“Weirdness” in collected charge and additional irradiation plans

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  1. “Weirdness” in collected charge and additional irradiation plans Anthony Affolder University of Liverpool

  2. Weirdness in Collected Charge +5-10% +30-35% “Normal” Annealing +5-10% “Weird” Annealing • ATLAS12 neutron and proton irradiated devices anneal differently • Don’t believe ATLAS07 had this difference • Not clear how ATLAS07 and ATLAS12 compare in detail • Normalization was performed differently as we were unaware of thickness of backplane connection (~7% effect) • Would like to understand both things to help in definition of final spec

  3. Irradiation Plan • Want to compare ATLAS07/12 before/after annealing after proton/neutron irradiation • Plan is to irradiate sets of 4 ATLAS07 + 4 ATLAS12 minis at the same time to 2 doses (5e14, 1e15) at both Ljubljana and Birmingham • The parts for Ljubljana are being sent • Measurement plan is to measure each before and after annealing at DESY, Liverpool and Ljubljana • One extra set available if anyone interested • Should give clear comparisons between ATLAS07/ATLAS12, protons/neutrons, ad pre/post annealing for specs and confidence in new sensors

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