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Mar 20 – 23, 2023
Campus Garching
Europe/Berlin timezone

Radiation Shielding Calculations for the PERC Magnet

Mar 21, 2023, 4:00 PM
Yards 4 - 6 (Fakultät für Maschinenwesen)

Yards 4 - 6

Fakultät für Maschinenwesen

Board: TU-110
Poster Fundamental Science Poster session TUESDAY


Jens Klenke (FRM II)


The free neutron decay offers an extensive test field for the Standard Model of Particle Physics. Several measurable correlation coefficients between the neutron and its main decay particles, protons and electrons, can be tested against the Standard Model description of this decay.

The PERC experiment, currently being assembled at the white neutron beam line MEPHISTO at the FRM II in Garching, is capable to measure these correlation coefficients with a high precision. The experiment is a 12 m long superconducting magnet which separates the electrical charged particles of the decay from the incoming neutron beam with a tunable magnetic field. The charged particles are measured outside of the magnet, the neutrons have to be stopped inside the magnet.
The neutron beam stop together with the decay volume are sources of unwanted radiation outside of the experiment. This radiation must be minimized by design of the beam stop or additional shielding.

The Author presents the status of the shielding calculation based on these conditions.

Primary author

Jens Klenke (FRM II)


Bastian Märkisch (Physik-Department, TUM)

Presentation materials

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