Göttingen 2025 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 39: Neutrino Physics IV

T 39.3: Vortrag

Dienstag, 1. April 2025, 16:45–17:00, VG 3.104

Integrated magnetic field design for next-generation neutrino mass experiment with CRES — •René Reimann and Martin Fertl for the Project 8 collaboration — Institute of Physics and Excellence Cluster PRISMA+, Johannes Gutenberg University Mainz, 55099 Mainz, Germany

The Project 8 experiment aims to probe the absolute neutrino mass through direct kinematic measurements of the tritium beta decay spectrum using cyclotron radiation emission spectroscopy (CRES). The low-frequency apparatus (LFA) should demonstrate the coexistence of CRES electron detection and an atomic trap while increasing the effective volume and lowering the background magnetic field compared to previous CRES experiments. To achieve the required energy resolution, the magnetic field experienced by the electrons must be known to very high precision. The magnetic field consists of a carefully tuned uniform background field with a super-imposed magnetic bottle trap to confine the CRES electrons within the detection region. In addition, a high-order multipole magnet adds a strong field only near the wall to confine the cold tritium atoms whose decay provides the electrons for CRES. This contribution describes how, individually and in concert, the three elements of Project 8's magnetic field impact key performance parameters of the detector.

Keywords: Neutrino Mass; Cyclotron Radiation Emission Spectroscopy; Magnetic Field