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Contents
1.
Introduction............................................................................................................................................. 4
2.
The MuSR spectrometer ...................................................................................................................... 5
2.1
Instrument features and layout ....................................................................................... 5
2.2
Rotating the spectrometer ................................................................................................ 5
2.3
Interlocks .............................................................................................................................. 5
2.3.1
Closing the area ..................................................................................................................... 6
2.3.2
Opening the area .................................................................................................................. 6
2.4
Muon beam ........................................................................................................................... 7
2.4.1
Rate, spot size, and slit positions .................................................................................... 8
2.4.2
Frequency response .......................................................................................................... 10
2.4.3
Range curve .......................................................................................................................... 10
2.5
Magnets ............................................................................................................................... 11
2.5.1
Main magnet ......................................................................................................................... 11
2.5.2
Calibration coils .................................................................................................................. 11
2.5.3
Zero field compensation .................................................................................................. 12
2.6
Detectors and Data Acquisition Equipment................................................................. 12
2.6.2
Data Acquisition Equipment .......................................................................................... 13
2.6.3
3.
Computers available ......................................................................................................... 13
Using SECI (Sample Environment Control Interface) ............................................................. 14
3.1
Loading configurations .................................................................................................... 14
3.2
SECI/OpenGENIE commands........................................................................................... 15
3.3
MuonScript ......................................................................................................................... 16
4. Sample Environment .......................................................................................................................... 18
4.1
Oxford Instruments Variox cryostat ............................................................................. 19
4.1.1
Setting up and changing sample ................................................................................... 19
4.1.2
High and low-temperature mode operation ............................................................ 19
4.1.3
Boost mode ........................................................................................................................... 20
4.2
Oxford Instruments Variox (Beast) ............................................................................... 21
4.2.1
Setting up and changing sample ................................................................................... 21
4.2.2
4.3
4.4
4.5
4.6
High and low-temperature mode operation ............................................................ 22
TBT dilution fridge ........................................................................................................... 23
Oxford Instruments dilution fridge ............................................................................... 23
Sorption refrigerator........................................................................................................ 24
Furnace................................................................................................................................ 24