| At line 7 added 3 lines. |
| + |
| + [ma15d.jpg] |
| + |
| Lines 17-18 were replaced by line 20 |
| - At present, MA15 can only be used on RITA2. However, some |
| - [Restrictions|MA15RitaRestrictions] have to be obeyed. |
| + !Restrictions |
| Line 20 was replaced by line 22 |
| - [Specifications|MA15Specifications] |
| + __after several quenches, operation above 12.5 without lambda stage is not recommended [see|http://samenv:8080/sample_environment/61]__ |
| Line 22 was replaced by lines 24-34 |
| - [Cooldown Procedure|MA15Cooldown] |
| + Due to force limits, restrictions are defined for the use of MA15. |
| + ||Instrument ||Allowed Max. Field [[Tesla] |
| + |RITA-2 |11.5 ... 14.9, see [MA15 Rita Restrictions] |
| + |TASP |14.9, see [MA15 TASP Restrictions] |
| + |EIGER |13, see [MA15 Eiger Restrictions] |
| + |ZEBRA |14.9 for the longer distance as defined for MA15 |
| + On all other instruments, MA15 can not yet be used. |
| + |
| + [Specifications / Ramp Limits|MA15Specifications] |
| + |
| + More information on intranet page (Drawing): [LdmWiki:MA15] |
| Line 24 was replaced by line 36 |
| - !Solved Issues |
| + [Omega Motor Change on Rita2] |
| Lines 26-28 were replaced by line 38 |
| - * The automatic needle valve control did not work properly. It seems that this |
| - was a mechanical problem. The magnet was sent back to |
| - Oxford Instruments and is now back and operational. |
| + [Cooldown Procedure|MA15Cooldown] |
| Lines 32-34 were replaced by lines 42-50 |
| - * The rotatable sample stick has a relatively bad thermal contact. Therefore the |
| - minimal sample temperature is only about 2.5 K. It seems that putting more |
| - exchange gas does not elimate this problem. |
| + * The automatic needle valve does not always work properly. |
| + A mechanical problem was solved by Oxford Instruments. |
| + It is still a problem that sometimes the needle valve bar |
| + gets frozen. This problem might be avoided when keeping warm |
| + the top of the needle valve during fill. However, at high |
| + fields, the air dryer might not work! |
| + |
| + * The nitrogen level gauge does not work. This has to be fixed, but |
| + it seems that it may appear often. |
| At line 35 added 3 lines. |
| + * During He-fill, LN2 has to be filled again in order to avoid |
| + air sucking into the LN2 dewar. |
| + |
| Line 41 was replaced by lines 60-63 |
| - |
| + |
| + [ma15b.jpg] |
| + [ma15a.jpg] |
| + [ma15c.jpg] |
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