The NOvA power distribution system

Creators: Dukes, E. C.; Ehrlich, R.; Goadhouse, S.; Mualem, L.; Norman, A.; Tesarek, R.

Abstract

We describe the power distribution systems and grounding schemes built for the near and far detectors of the NOvA long-baseline neutrino experiment. They are used to power the avalanche photodiodes and their thermoelectric coolers, the front-end boards that read out, digitize and time stamp the signals from the avalanche photodiodes, and the data concentrator modules used to receive and format the data from the front-end boards before sending them to a farm of computers used to build the events. The system powers 344, 064 readout channels in the far detector and 20, 192 channels in the near detector.

Additional Information

© 2018 Elsevier. Received 8 April 2018, Revised 16 May 2018, Accepted 8 June 2018, Available online 22 June 2018. We wish to acknowledge the assistance of J. Oliver of Harvard University in the design of the high-voltage limiting circuit, M. Johnson of Fermilab in the design of the grounding system, and M. Matulik in the design of the relay rack protection system. We acknowledge the important contributions to the design, fabrication, and testing of the NOvA power distribution system from University of Virginia undergraduate students: G. Bailey, D. Evans, N. Fields, J. Gran, E. Ho, S. Hasselquist, K. Lagergren, D. Mudd, S. Russo, H. Tammaro, and K. Tran; technicians B. Mason and L. St. John; and graduate student Z. Wang. This work was supported by the US Department of Energy. Fermilab is operated by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the US DOE.

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