MA7Specifications

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MA7 Specifications

Sample space dimensions

see Magnet List

Energisation rates (Tesla/min)

Symmetric mode

Field range Training mode (slow)Normal mode (fast)
< 3.5 0.2112 0.25
3.5 ... 4.9 0.1408 0.25
4.9 ... 6.0 0.0704 0.25
6.0 ... 6.8 0.0352 0.25

Asymmetric mode

Field range Training mode (slow)Normal mode (fast)
< 3.1 0.1848 0.25
3.2 ... 4.3 0.1232 0.25
4.3 ... 5.2 0.0616 0.25
5.2 ... 6.2 0.0308 0.25

Training mode has to be used after a cool down and after a mode change (sym/asy)

Main Coils

Mode of operation: SymmetricalAsymmetrical
Guaranteed maximum central magnetic field6.86.2 Tesla
Current for full field 96.363100.657 A
Homogeneity over 15 mm diameter sphere 0.31%1.05%
Magnet clear bore diameter (not sample space!)6565 mm
Nominal inductamce 11278.7 Henry
Switch heater current for open state 6060 mA
Current decay in persistent mode < 6/1000000/h< 7/1000000/h
Distance of magnetic field centre for base of cryostat249249 mm

Resistance values (Ohm)

RT 77 K 4.2 K
Magnet coil 47 33.5 0.2
Asymmetric coil 45.9 29.8 0.2
Switch heater 114.9112.8106.0
Spare switch heater 115.3113.1106.3
Allen Bradley on one coil 340
Allen Bradley on other coil 343

General

Liquid He evaoration rate (needle vale close, no current)225 cm3/h
Liquid N2 evaporation rate 285 cm3/h
Useful liquid He volume 54 l
Liquid N2 volume 60 l
Approximate weight 600 kg

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This page last changed on 15-Aug-2013 08:13:28 UTC by MarkusZolliker.