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# Neutrino 2020

June 22, 2020 to July 2, 2020
US/Central timezone

## Magnetic field calibration and instrumental response for Project 8 Phase II apparatus with a Kr-83m source

Not scheduled
10m
Poster

### Speakers

Ms Christine Claessens (Johannes Gutenberg - Universität Mainz) Dr Walter Pettus (University of Washington) Mr Yuhao Sun (Case Western Reserve University)

### Description

The Project 8 collaboration developed the Cyclotron Radiation Emission Spectroscopy (CRES) technique, aiming to directly measure the absolute neutrino mass with the tritium beta-decay electron energy spectrum endpoint method. Given the convenience of its K-conversion line at 17.8 keV near the tritium endpoint at 18.6 keV, we use $^{83m}$Kr as an electron source for magnetic field calibration and instrumental response measurement.

In this poster, we present our fitting of the spectrum of the $^{83m}$Kr 17.8 keV line measured by the Project 8 Phase II apparatus. Based on the fitting, we find our instrumental resolution can be as small as $\sim$2 eV in a shallow magnetic trap. We also present the linearity performance of the instrumental response.

### Mini-abstract

We present fitting of $^{83m}$Kr 17.8 keV line measured in Project 8 Phase II.

Experiment/Collaboration Project 8

### Primary authors

Ms Christine Claessens (Johannes Gutenberg - Universität Mainz) Dr Walter Pettus (University of Washington) Mr Yuhao Sun (Case Western Reserve University)

### Presentation Materials

 Kr_spectrum_poster_neutrino2020v8.pdf zoom_0v9.mp4