Göttingen 2025 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 14: Methods in Astroparticle Physics I

T 14.3: Vortrag

Montag, 31. März 2025, 17:15–17:30, VG 3.101

In-situ Calibration Routines for IceCube Upgrade mDOMs without Artificial Light Sources — •Carolin Klein¹ and Summer Blot² — ¹Erlangen Centre for Astroparticle Physics (ECAP), Friedrich-Alexander-Universität Erlangen-Nürnberg, Germany — ²DESY, Zeuthen, Germany

Calibration is crucial for the success of every physics experiment. Over the last decade, the IceCube Neutrino Observatory has yielded important results in neutrino astronomy and neutrino oscillations. Building on this progress, the IceCube Upgrade project is set to expand the current detector array during the austral summer 2025/26. It will enhance the detector's overall sensitivity and lower its energy threshold by reducing the spacing between strings, enabling more detailed studies of atmospheric neutrinos.

In this talk, in-situ calibration routines without artificial light sources for the IceCube Upgrade multi-PMT digital optical modules (mDOMs) are proposed. This includes the calibration of the mDOM mainboard electronics using front-end pulsers, as well as the PMT gain and relative transit time calibration using the natural radioactivity from the glass vessel. The latter approach allows for a long-term monitoring of the PMT gain and the relative transit time without downtimes of the modules. First results of the routines will be presented in this talk.

Keywords: IceCube Upgrade; Calibration; PMT; mDOM