Speaker
Description
Muon-spin spectroscopy at continuous sources has long been limited to a muon stopping rate of approximately \SI{40}{kHz}.
The primary constraint arises from the requirement that only a single muon can be present in the sample during the \SI{10}{\mu s} data collection window.
This limitation stems from the widespread use of scintillator-based detectors to track incoming muons and outgoing positrons, which lack the ability to handle higher rates effectively.
To overcome this limitation and facilitate muon-spin relaxation (\mSR) measurements with sub-milimeter samples, ultra-thin Si-pixel detectors can be utilised.
These detectors enable the reconstruction of the position where the muon stops within the sample, leveraging this additional spatial information to significantly increase the measurable muon rate.
In this work, we present results from a Si-pixel-based spectrometer that uses vertex reconstruction for both incoming muons and emitted positrons.
For the first time, we successfully measured a \mSR ~spectrum employing monolithic Si-pixel detectors.
Furthermore, combining this spectrometer with a scintillating fibre detector provides not only enhanced spatial but also good timing measurement, achieving a resolution of \SI{500}{ps}.
We conducted several test runs at the Paul Scherrer Institute (PSI) and the Mainz Microtron (MAMI) to validate the performance and capabilities of this advanced detector system.
