20-25 October 2019
Europe/Zurich timezone

A multi-pass optical cavity for the HyperMu experiment

22 Oct 2019, 18:11
WHGA/001 - Auditorium (PSI)

WHGA/001 - Auditorium



Miroslaw Marszalek


The measurement of the hyperfine splitting (HFS) in muonic hydrogen at the ppm level by means of pulsed laser spectroscopy allows for extraction of the Zemach radius of the proton at the per mille level. This measurement, ongoing at the Paul Scherrer Institute, features a novel laser system to excite the HFS transition at 6.8 µm. To increase the transition probability, we will use a multi-pass optical cavity, which enhances the average light fluence on the muonic atoms. The poster presents the principle of the experiment, the cavity requirements and the current state of the optical design.

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