| Line 1 was replaced by line 1 |
| - !!MA6 vertical field cryomagnet |
| + !!!MA6 vertical field cryomagnet |
| Line 3 was replaced by lines 3-4 |
| - !Restrictions |
| + !!Sample space dimensions |
| + see [Magnet List] |
| At line 4 added 2 lines. |
| + !!Restrictions |
| + |
| Line 6 was replaced by line 9 |
| - |DMC |2.5 Tesla | |
| + |DMC |6 Tesla | |
| At line 8 added 58 lines. |
| + |PREP |6 Tesla |in its trolley, far enough from "Kabelkanal" |
| + |HRPT |6 Tesla | (measured forces below 200 N vertically and horizontally, even for xy table) |
| + |RITA II |6 Tesla | with goniometer mounted (goniometer motors removed? - to be verified) |
| + |EIGER |6 Tesla | with goniometer mounted (including gonio motors) |
| + |TASP |6 Tesla | with goniometer mounted (including gonio motors) |
| + On EIGER the vertical force was less than 80 N at 4.25 Tesla -> no problem. (force test 2020-09-14 by MZ) |
| + |
| + On all other instruments, to be evaluated before first use. |
| + |
| + max. Forces on Magnet: |
| + |horizontal |500N |
| + |vertical |500N |
| + |
| + max. goniometer tilt: |
| + +-5 deg |
| + |
| + !!Specifications |
| + |
| + More Information on intranet page (Drawing): [LdmWiki:MA6] |
| + |
| + !Energisation rates (Tesla/min) |
| + |
| + |Field range|Training mode (slow)|Normal mode (fast) |
| + |below 4.8 T|0.1922 |0.3844 |
| + |4.8 ... 6 T|0.0641 |0.3844 |
| + |
| + !Main Coils |
| + |
| + |Guaranteed maximum central magnetic field|6 Tesla |
| + |Current for full field |93.661 A |
| + |Homogeneity over 15 mm diameter sphere |1.0 % |
| + |Magnet clear bore diameter |50 mm |
| + |Nominal inductance |18.13 Henry |
| + |Switch heater current for open state |65 mA |
| + |Current decay in persistent mode |< 1/10000 / h |
| + |Distance of magnetic field centre for base of cryostat| 165 mm |
| + |Neutron split |40 mm |
| + |Vertical neutron access on a 15 mm sphere|±15 deg |
| + |Horizontal neutron access |340 deg |
| + |
| + !Resistance values (Ohm) |
| + |
| + | |RT |77 K |4.2 K |
| + |Magnet coil |48.4 |39.4 |0.1 |
| + |Switch heater |114.7|112.5|104.5 |
| + |Spare switch heater |112.7|110.4|103.5 |
| + |Thermometer on coil (Allen Bradley)|317.5|385 |4560 |
| + |
| + !General |
| + |
| + |Liquid He evaoration rate (needle vale close, no current)|<275 cm3/h |
| + |Liquid N2 evaporation rate |300 cm3/h |
| + |Useful liquid He volume | 22 l |
| + |Liquid N2 volume | 25 l |
| + |Approximate weight | 150 kg |
| + |
| + !Field Homogeneity |
| + [MA6/ma6_homogeneity.png] |
| Line 10 was replaced by line 71 |
| - !Pending Issues |
| + !Solved Issues |
| At line 11 added 1 line. |
| + The following problems seem to be solved after repair at Oxford Instruments (Aug 2010) |
| At line 13 added 2 lines. |
| + * The magnet sometimes quenches (only above 4.8 T) -> solved by strictly obeying the |
| + training mode ramps. |
| Removed line 15 |
| - * The magnet sometimes quenches (only above 4.8 T) |
LIN