Speaker
Description
We report on an irradiation of the production version of the read-out-chip for the CMS HL-LHC pixel detector (CROC v2) to 1.6 Grad with $^{60}\rm{Co}$ $\gamma$s at Sandia National Lab. The CROC was kept powered, configured, and as close to its nominal operating temperature (-20$^o$ C) as much as possible during the irradiation. Internal chip voltages, pixel response, and diagnostic ring oscillators were continuously measured. Detailed threshold optimization was performed twice a day when possible. The CROC was very performant at 1.6 Grad when an external event ended the irradiation and damaged the CROC. Where available, these results will be compared with those for similar ROCs fabricated in the TSMC 65 nm process using the RD53A, B, and C (this ROC) architectures, and irradiated to a few Grad using much-lower-energy x-ray sources.
