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Title: The laser-based gain monitoring system of the calorimeters in the Muon $g-2$ experiment at Fermilab

Journal Article · · Journal of Instrumentation
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The Muon $g-2$$ experiment, E989, is currently taking data at Fermilab with the aim of reducing the experimental error on the muon anomaly by a factor of four and possibly clarifying the current discrepancy with the theoretical prediction. A central component of this four-fold improvement in precision is the laser calibration system of the calorimeters, which has to monitor the gain variations of the photo-sensors with a 0.04\% precision on the short-term ($$\sim 1\,$ms). This is about one order of magnitude better than what has ever been achieved for the calibration of a particle physics calorimeter. The system is designed to monitor also long-term gain variations, mostly due to temperature effects, with a precision below the per mille level. This article reviews the design, the implementation and the performance of the Muon $g-2$ laser calibration system, showing how the experimental requirements have been met.

Research Organization:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Cornell Univ., Ithaca, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Contributing Organization:
Muon g-2 Collaboration
Grant/Contract Number:
AC02-07CH11359; SC0008037
OSTI ID:
1546011
Alternate ID(s):
OSTI ID: 1908508
Report Number(s):
FERMILAB-PUB-19-246-PPD; arXiv:1906.08432; oai:inspirehep.net:1740748
Journal Information:
Journal of Instrumentation, Vol. 14, Issue 11; ISSN 1748-0221
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English

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