MuSR technical information (alternate)

Version of comparison table with the MuSR column highlighted.

Technical Summary

 

Instrument

EMU

HiFi

MuSR

ARGUS

CHRONUS

Muon Beam

Surface positive muons (p=27±1MeV/c, E=3.2MeV). Polarisation > 99%.

Positive or negative decay muons, also positive surface muons.

Range (1)

Mean range 100mg/cm2, spread 50mg/cm2

Surface muons:

Mean range 100mg/cm2, spread 50mg/cm2

Pulse structure

Single pulse (70ns FWHM),

repetition rate 50Hz (with 1 of 5 repetitions missing)

Single or double pulse (70ns FWHM, separation 324ns), repetition rate 50Hz (with 1 of 5 repetitions missing)

Frequency response

Up to 10MHz for relaxation/rotation limited by the pulse width.

RF and laser experiments can allow up to 500MHz.

Spot size (mm) (H,V)

10-30, 10

10-30, 10

10-30, 10

10-50,

10-50

10-50,

10-50

Detectors

32

64

64

192

606

Typical count rate (MEv/h)

25

45

45

55

TBA

Background

Constant at <10-5 of peak muon rate. Background and muon count rates equal at ~25µs.

TBA

TBA

Maximum magnetic fields:

Zero field

<0.01G

<0.1G

<0.01G

TBA

TBA

Longitudinal field

4500G

50000G

2500G

3950G

3950G

Transverse field

100G

150G

600G

200G

600G

Sample environment:

Dilution fridge

Coming soon

30mK-300K

40mK-4K

Y

N

He3 cryostat

0.35-50K

N

0.35-50K

0.35-300K

N

He4 cryostat

1.5-300K

1.5-400K

1.5-300K

1.5-300K

N

Flow cryostat

5-300K

3-300K

3-600K

10-300K

N

CCR

12-600K

10-600K

Returning

soon

N

N

Furnace

300-1500K

300-1500K

300-1000K

Y

N

Gas handling

Y

N

Y

N

N

Liquid handling

Y

Coming soon

Y

N

N

Radio frequency

Y

Coming soon

Y

Y

N

Pressure

<50 bar

N

N

Y

N

Laser stimulation

Coming soon

N

N

Y

N

Notes:

(1) These values are before cryostat or cell windows. 100mg/cm2 corresponds to ~1mm in water and ~0.1mm in silver.

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