Dortmund 2021 – scientific programme

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T: Fachverband Teilchenphysik

T 18: Neutrino physics without accelerators I

T 18.8: Talk

Monday, March 15, 2021, 17:50–18:05, Tr

Magnetic Trap Design for the Project 8 Free Space CRES Demonstrator — •René Reimann and Martin Fertl for the Project 8 collaboration — PRISMA+ Cluster of Excellence, JGU Mainz

The existence of non-zero neutrino masses is well established, however their absolute values are a major open question in particle physics. The most direct way to measure the neutrino mass is through a measurement of the spectral endpoint region for a low-energy beta decaying isotope, e.g. tritium. A new technique called Cyclotron Radiation Emission Spectroscopy (CRES) has been demonstrated by the Project 8 collaboration with krypton or molecular tritium confined in a section of a microwave guide. To collect sufficient statistics to reach a neutrino mass sensitivity of 40 meV requires to leave the confined space within a microwave guide and detect the feeble microwave signal in free-space by observing the volume with a set of antennas. All major challenges for a full-scale neutrino mass experiment will be investigated in the coming phase. A key component of the free-space CRES demonstrator is a magnetic trap to confine electrons in a region superimposed on to the homogeneous ∼1 T magnetic background field provided by an MRI magnetic. In this talk, we will present the design of the magnetic electron trap, characteristic parameters, and relationships to other key components of the free-space CRES demonstrator.