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This is version 3.
It is not the current version, and thus it cannot be edited.
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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: | Symmetrical | Asymmetrical |
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| Guaranteed maximum central magnetic field | 6.8 | 6.2 Tesla |
| Current for full field | 96.363 | 100.657 A |
| Homogeneity over 15 mm diameter sphere | 0.31 | 1.05% |
| Magnet clear bore diameter | 65 | 65 mm |
| Sample space | 48 | 48 mm |
| Nominal inductamce | 112 | 78.7 Henry |
| Switch heater current for open state | 60 | 60 mA |
| Current decay in persistent mode | < 6/1000000/h | < 7/1000000/h |
| Distance of magnetic field centre for base of cryostat | 249 | 249 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 | 114.9 | 112.8 | 106.0 |
| Spare switch heater | 115.3 | 113.1 | 106.3 |
| 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 |
This particular version was published on 04-Jun-2012 08:19:55 UTC by MarkusZolliker.
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LIN