Argus technical information
22 Jul 2009
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Table of instrument parameters. Contact the instrument scientist for more information.

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Instrument

ARGUS

Muon Beam

Positive surface muons, also positive or negative decay muons.

Range (1)

For surface muons: Mean range 100mg/cm2, spread 50mg/cm2

Pulse structure

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 (Diameter)

Set by collimator, 10-50mm

Detectors

192

Typical count rate (MEv/h)

55 (single pulse), 70 (double pulse)

Background

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

Maximum magnetic fields:

Zero field

<0.1G

Longitudinal field

3950G

Transverse field

150G

Sample environment:

He3 cryostat

300mK -> 300K

He4 cryostat

1.5K -> 300K

Flow cryostat

5K -> 300K

CCR

N/A

Furnace

Coming soon

Gas handling

N/A

Liquid handling

N/A

Radio frequency

Yes

Pressure

Up to 0.6GPa, to 1.5K (gas)

Laser stimulation

Yes

 Notes:

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

Contact: