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The LED calibration systems for the mDOM and D-Egg sensor modules of the IceCube Upgrade: Design, production, testing and use in module calibration
Journal article   Open access   Peer reviewed

The LED calibration systems for the mDOM and D-Egg sensor modules of the IceCube Upgrade: Design, production, testing and use in module calibration

R. Abbasi, M. Ackermann, J. Adams, S.K. Agarwalla, J.A. Aguilar, M. Ahlers, J.M. Alameddine, S. Ali, N.M. Amin, K. Andeen, …
Journal of instrumentation, v 20(11), P11026
01 Nov 2025
url
https://doi.org/10.1088/1748-0221/20/11/P11026View
Published, Version of Record (VoR) Open

Abstract

Analogue electronic circuits Detector alignment and calibration methods (lasers, sources, particle-beams) Instrumentation and methods for time-of-flight (TOF) spectroscopy
The IceCube Neutrino Observatory, instrumenting about 1 km3 of deep, glacial ice at the geographic South Pole, is due to be enhanced with the IceCube Upgrade. The IceCube Upgrade, to be deployed during the 2025/26 Antarctic summer season, will consist of seven new strings of photosensors, densely embedded near the bottom center of the existing array. Aside from a world-leading sensitivity to neutrino oscillations, a primary goal is the improvement of the calibration of the optical properties of the instrumented ice. This calibration will be applied to the entire archive of IceCube data, improving the angular and energy resolution of the detected neutrino events. For this purpose, the Upgrade strings include a host of new calibration devices. Aside from dedicated calibration modules, several thousand LED flashers have been incorporated into the photosensor modules. We describe the design, production, and testing of these LED flashers before their integration into the sensor modules as well as the use of the LED flashers during lab testing of assembled sensor modules.

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Instruments & Instrumentation
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