| At line 2 added 4 lines. |
| + max.Force |
| + |horizontal|500N |
| + |vertical|1000N |
| + |
| Lines 5-9 were replaced by lines 9-18 |
| - ||Instrument|Allowed maximum field [[Tesla] |
| - |AMOR |4 |
| - |RITA-II |4 ... 5.5 (see below) |
| - |SANS-I |6.8 / 6.2 (full field) |
| - |TASP |3.3 ... 5 (see below) |
| + ||Instrument||Allowed maximum field [[Tesla] || Conditions |
| + |AMOR |4 | field perpendicular beam |
| + |AMOR |6.8 | field parallel beam |
| + |RITA-II |4 ... 6.8 | see below |
| + |SANS-I |6.8 / 6.2 (full field)| with spin flipper only when field perpendicular to beam |
| + |SANS-II |6.8 / 6.2 (full field)| |
| + |TASP |6.8 | see below (A3 does not move > 4 Tesla) |
| + |EIGER |6.8 / 6.2 (full field)|goniometer removed |
| + |ZEBRA |6.8 / 6.2 (full field)|L1 = 1500 mm, L2 = 785 mm (1D detector) |
| + |ZEBRA | 5 / 5 |L1 = 1000 mm, L2 = 785 mm (1D detector) |
| At line 12 added 1 line. |
| + Goniometer removed.\\ |
| Lines 19-21 were replaced by lines 29-33 |
| - For any other configuration force tests have to be done. |
| - As soon as the appropriate adapter plate is avaliable, we should |
| - repeat the force measurements. |
| + * 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. |
| Lines 31-66 were replaced by lines 43-47 |
| - Provisional force measuremnents on AMOR have shown that |
| - the operation of MA7 on AMOR is allowed with a field perpendicular |
| - to the beam at least up to 4 Tesla. |
| - The distance to the shielding wall between AMOR and SANS-II has |
| - to be at least 540 mm, measured from the aluminium window |
| - (or about 870 mm to the magnet centre). |
| - |
| - ''Torque Calculations'' |
| - |
| - In general, the forces are not only radial, but also tangential, |
| - inducing a torque onto the magnet. For estimating the forces |
| - on the fixation, we need to take into account the distance of |
| - the fixation points from the coil center. |
| - |
| - For MA7, with a mean coil radius of about 100 m and fixation points |
| - at about 150 mm for the coil center, we get the following: |
| - |
| - Ro: object distance (mm)\\ |
| - phi: angle (deg) between field direction and direction of object, for maximum force on fixation\\ |
| - Fp: force when object on magnet axis (in field direction) |
| - Ft: maximum total force on fixation |
| - |
| - ||Ro ||phi ||Ft / Fp |
| - |<600 | 0 | 1.0 |
| - | 800 | 20 | 1.04 |
| - | 1000 | 27 | 1.13 |
| - | 1200 | 32 | 1.25 |
| - |
| - For the distance to the shielding wall we have to add 1/5 of the edge |
| - distance for the mean distance of the material that has to be taken |
| - into account (870 * 6/5 = 1044 mm). |
| - |
| - Measured force at 3.4 Tesla: 180 N.\\ |
| - Extrapolated to 5 Tesla: 390 N.\\ |
| - Factor 1.2 for including torque: 470 N.\\ |
| - With a reasonable security margin, we allow to go up to 4 Tesla. |
| + 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) |
| Lines 70-73 were replaced by lines 51-55 |
| - ||A2 || distance sample - \\monochromator shielding surface|| Allowed field |
| - |-90 < A2 < -41 (Ei=14.7 meV)|>=122 cm | 3.3 Tesla |
| - |-90 < A2 < -56 (Ei=8 meV)|>=108 cm | 4 Tesla |
| - |-90 < A2 < -82 (Ei=4.1 meV)|>=108 cm | 5 Tesla |
| + Goniometer removed.\\ |
| + Beryllium Filter Distance 27 cm (see photo)\\ |
| + Sample table - Monochromator - 73 cm\\ |
| + ||A2 || a4 || Allowed field |
| + |-92 < A2 < -41 (Ei=14.7 meV)|<= 119 | __6.8 Tesla__ |
| At line 74 added 7 lines. |
| + __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. |
| + |
| + [MA7Restrictions/taspFilterMA7.png][MA7Restrictions/distanceTASP.jpg] |
| + |
| Line 77 was replaced by line 66 |
| - Allowed up to maximum field independend of the field direction. |
| + Allowed __up to maximum field__ independend of the field direction. |
| Line 79 was replaced by lines 68-71 |
| - Force measurements: |
| + 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): |
| At line 82 added 4 lines. |
| + |
| + !Force Test on SANS-II 21.5.2015 |
| + |4.9 T perpendicular to beam|300 N vertical|140 N horizontal |
| + |4.9 T parallel to beam|300 N vertical|60 N horizontal |
LIN