| At line 2 added 5 lines. |
| + More Information on intranet page (drawing): [LdmWiki:MA09] |
| + |
| + [ma09a.jpg] |
| + [ma09b.jpg] |
| + |
| At line 4 added 25 lines. |
| + ![Temperature Sensors] |
| + * on sample stick: [x22642|CalibrationCurves/x22642.txt] |
| + * on VTI heat exchanger: [c17844|CalibrationCurves/c17844.txt] |
| + * common, very rough calibration for all Allen-Bradley test sensors: |
| + [cplus70|CalibrationCurves/cplus70.txt] |
| + |
| + !Restrictions |
| + |
| + || Instrument || Field Limit || Comment |
| + |TASP |6 Tesla |with goniometer, goniometer motors removed, distance to Be filter: > 20 cm |
| + |TASP |9 Tesla |without goniometer unit, monochromator 2theta > 75, distance to Be filter[1]: > 22 cm\\7.9 Tesla: 2theta > 55 ? |
| + |Rita-II |4 Tesla\\9 Tesla|with goniometer, goniometer motors removed\\without goniometer |
| + |DMC |1.4 Tesla | |
| + |HRPT |4 Tesla |without RC shielding [2] |
| + |FOCUS |9 Tesla |magnetic rail and motor of radial collimator removed\\distance magnet center to mono center 2 m, 2theta < 132 deg or magnet surface to guide surface > 0.9 m |
| + |TriCS |2 Tesla |due to problems with omega-encoder (from the forces 4 T is possible) |
| + |Morpheus |3.5 Tesla |with X-Y table, dist. to diaphragmas at least 250 mm, omega motor not in use |
| + |Morpheus |2 Tesla |with omega motor |
| + [1|#1] on TASP: [MA09/taspFilterMA09.png] |
| + |
| + [2|#2] on HRPT: [MA09/RCshielding.jpg][MA09/RCmotor.jpg]\\ |
| + The RC shielding (left picture) has to be removed. One of the pieces making trouble is probably the RC motor (right picture). |
| + |
| + On all other Instruments, MA09 can not yet be used. |
| + |
| Lines 7-10 were replaced by lines 37-61 |
| - * The magnet has suffered of some cold leak, occuring only occasionaly |
| - at low temperatures. An indium seal on the capillary has been redone, |
| - and after 2 weeks of succesful operation, it can be hoped, that this problem |
| - is solved. |
| + * The magnet has a cold leak, occuring only occasionaly at low temperatures. |
| + As a workaround the main vacuum has to be pumped constantly. (Oct 2006) |
| + |
| + ! Solved issues |
| + |
| + * The magnet seemed not to work reliably with the lambda stage |
| + (2 quenches during an expt. on TASP in November 2006). The reason is |
| + not yet clear. A user claimed that the switch heater power is too low |
| + when using the lambda stage. It seems that this is not the case |
| + (see [MA09switchHeater]). |
| + A test in February 2007 showed no quench up to 9 Tesla. However, |
| + if we extrapolate the force measurements at 5 Tesla, we get forces |
| + near 1000 kN both vertically and horizontally (with shortened distance |
| + sample - mono). At normal distance, the horizontal forces are much lower, |
| + and the vertical forces should be reduced after replacing the A3 motor box. |
| + We now believe that during the quench, the magnet was too close to the |
| + magnetic beam dump of TASP. |
| + |
| + * There seem to be a problem with the He level gauge. As a workaround, an |
| + additional gauge is placed in the He filling port. (2005-10-19) |
| + Solved in winter 2006. |
| + |
| + |
| + [TASP adapter| taspMa9_1.jpg] [TASP adapter |taspMa9_2.jpg] |
| + |
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