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SμS: Swiss Muon Source

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DOLLY Developments

The continuous extension and improvement of the experimental capabilities of the MuSR spectrometers, allows them to remain competitive in the modern fast-paced scientific landscape, while serving the needs of the MuSR research community. To this aim, also for the Dolly spectrometer we plan a series of incremental improvements, as well as the addition of new features.

 

Improved detector system

An upgrade to silicon photomultiplier (SiPM) detectors will provide a more compact detection system, with a better time resolution, and a lower sensitivity to external magnetic fields. The final goal here is to access higher internal magnetic fields.

Upgrade to a multi-window cryostat design

This development, currently under test, will allow us to mount multiple samples simultaneously and then measure them sequentially. Considering that each sample mounting and cool down takes many hours, this will enhance the efficiency of beam time use, while reducing the consumption of liquid helium (particularly high during the initial cool-down procedure).

Extend the range of magnetic fields perpendicular to the beam

We evaluate the possibility to double the current field limit (from 150 to 300 G) which would enable TF-muSR experiments, in particular, in single-crystal samples, without the need to reorient them.

The increased muon-beam deviation at higher fields would have to be suitably compensated by a detector and sample translation system.

Uniaxial pressure capabilities

In collaboration with TU Dresden and the MPI Dresden we have developed a piezoelectric-driven uniaxial pressure cell for muon spin relaxation experiments which is utilized for first experiments in Dolly. We plan to further develop this strain cell towards higher pressures, robustness and user friendliness. 


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LMU and Groups

  • Laboratory for Muon Spin Spectroscopy (LMU)
  • Low-Energy Muons Group
  • Bulk-µSR Group

Instrument Contact:

Toni Shiroka
E-mail: toni.shiroka@psi.ch
 

User Office

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Call for Proposals

Next Deadline: June 01, 2023.

PSI User Facilities Newsletter

Current News from PSI photon, neutron and muon user facilities


NUM Homepage

PSI Division Research with Neutrons and Muons.


MuonSources.org

MuonSources.org provides information about muon facilities and muon research worldwide.

ISMS

The International Society for µSR Spectroscopy (ISMS).

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