Diff: MA09

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JSPWiki v2.0.52


Difference between version 62 and version 13:
At line 2 added 5 lines.
+ More Information on intranet page (drawing): [LdmWiki:MA09]
+
+ [ma09a.jpg]
+ [ma09b.jpg]
+
Lines 14-16 were replaced by lines 19-21
- |TASP |6 Tesla |with goniometer, goniometer motors removed
- |TASP |9 Tesla |without goniometer unit (adapter piece should be available in Sept 2005)
- |Rita-II |4 Tesla ? |with goniometer, goniometer motors removed (to be remeasured)
+ |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
Lines 18-20 were replaced by lines 23-31
- |HRPT |?? |force measurements to be redone
- |FOCUS |9 Tesla |when more than 1.5 m from guide shielding
- |TriCS |?? |force measurements to be redone
+ |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).
At line 21 added 2 lines.
+ On all other Instruments, MA09 can not yet be used.
+
Lines 24-27 were replaced by lines 37-40
- * The magnet has a cold leak, probably on the capillary, occuring
- only occasionaly at low temperatures. The indium seal has been redone.
- Because there is actually a high demand, as a workaround a diffusion
- pump is connected on the main vacuum constantly. (2005-10-24)
+ * 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
At line 28 added 13 lines.
+ * 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.
+
At line 30 added 5 lines.
+ Solved in winter 2006.
+
+
+ [TASP adapter| taspMa9_1.jpg] [TASP adapter |taspMa9_2.jpg]
+

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