Restrictions for MA7

max.Force

Summary

Restrictions on RITA-II

Goniometer removed.
Provisional force measuremnents on RITA-II have shown that the operation of MA7 on Rita-II is allowed:

• between 3.0 and 18.0 meV (a2 >= 37 deg) at a distance of 450 mm or more, up to 4 Tesla
• between 3.0 and 8.0 meV (a2 >= 56 deg) at a distance of 450 mm or more, up to 4.4 Tesla
• between 3.0 and 8.0 meV (a2 >= 56 deg) at a distance of 540 mm or more, up to 5.5 Tesla (we had a quench at 6 Tesla!)
• between 3.0 and 13.68 meV (a2 >= 42.7 deg) at a distance of 680 mm* or more, up to 6.8 Tesla

* at a distance of more than 680 mm or a2 angles < 42.7 the analyser tank touches the wall at a4 ~= 45

For any other configuration force tests have to be redone.

MA7 Original Data

How the distance has to be measured. In this example the distance is around 400 mm.

Restrictions on AMOR

Force tests after major instrument upgrade 2023-11-21:

Allowed field when perpendicular to beam: 6.8 Tesla (forces 300 N horizontally, 480 N vertically)

Field parallel to field: 3 Tesla (horizontal force 280 N, guide field is moving, not secured enough! this should be fixed)

Restrictions on TASP

Goniometer removed.
Beryllium Filter Distance 27 cm (see photo)
Sample table - Monochromator - 73 cm

WARNING: Motor A3 may not move with a field > 4 Tesla

This data is derived from the force test 7. July 2015:
4.8 Tesla, horizontal force 150 N (towards Beryllium filter), vertical force 180 N.

Restrictions on SANS

Allowed up to maximum field independend of the field direction.

With spin flipper only when field perpendicualr to beam and in asymmetric mode. Other configurations with spin flipper have to evaluated.

Force measurements (without spin flipper):

Force Test on SANS-II 21.5.2015