Reviews, reviews, reviews… so many reviews. Since nus2surf reported on the single-phase detector system reviews in September (Single-Phase detector system reviews are proceeding), the design has undergone four additional reviews.
The Cold Electronics (CE) review at Brookhaven National Laboratory in October was held jointly with SBND. The review team congratulated the scientists on the significant progress towards understanding issues observed in the 35-ton prototype run, while recognizing that the current ADC chips still exhibit some linearity problems. The reviewers concluded that ProtoDUNE-SP should proceed using the existing chip designs, as the chances of producing a significantly improved ADC in the time available is not very high. They further recommended that the collaboration take some time to review the ADC requirements and the performance of the existing ADC chips as inputs to a process that would determine the best course of action moving forward into DUNE. Based on these recommendations, the CE team is moving forward with the production of electronics components for ProtoDUNE-SP, and a workshop is being planned for early next year to discuss different possible approaches for further development.
Three very successful reviews followed in November at CERN in quick succession: the Data Acquisition System (DAQ); the Detector Support System (DSS); and the combination of Cathode Plane Assembly (CPA), Field Cage (FC) and High Voltage system (HV). A significant theme that arose during these reviews was the process for satisfying CERN safety requirements for installing and operating the detector. CERN representatives clarified the required documentation, providing useful input for the subsystem teams.
Throughout this review series, reviewers have recognized and commended the experiment on the considerable amount of work that has been accomplished on the tight timescale imposed the desire to operate the detector in 2018. Onward!