Magnet |
field at sample | 14.9 Tesla |
" without lambda stage | 13.5 Tesla |
operating current for 14.9 T | <120 A |
maximum allowed vertical magnetic forces | 1000 N |
maximum allowed horizontal magnetic forces | 1000 N |
homogeneity over a 10 mm diameter sphere | 0.5% |
field stability in persistent mode | 0.01 % / hour |
Stray Field at 14.9 Tesla |
at 1 m horizontal distance | 330 Gauss |
at 1 m vertical distance | 660 Gauss |
critical distance for loose ferromagnetic parts 500 Gauss/metre | 1.40 m vertical 1.20 m horizontal |
Variable Temperature Insert |
temperature range (no field dependend limitations) | 1.6 ... 300 K |
temperature stability | +- 0.1 K |
automatic needle valve control only above | 3 K |
exchange gas needed in sample space (measured at RT) | <15 mbar |
Dimensions |
sample space diameter above magnet | 49.5 mm |
diameter of sample space | 20 mm |
max. useable sample height | 20 mm |
split access angle | +- 2 deg |
sample height for +-2 deg access(visible by neutrons) | 14 mm |
horizontal access angle | > 330 deg |
distance from base of cryostat to scattering plane | 240 mm |
total radial aluminium window thickness | 43.4 mm |
total radial aluminium in entrance window | 8.6 mm |
entrance window size (radiussed corners 3 mm) | 15 x 15 mm |
diameter for transfer tube | 12 mm |
Cryostat |
total weight including cryogens | 650+-30 kg |
useable LHe capacity | 55 l |
LHe boil off (static mode) | <350 cc/hr |
LN2 capacity | 60 l |
typical LN2 boil off | 600 cc/hr |
There are only a little number of breakpoints - interpolatting the ramp rate with more
breakpoints resulted in the following, actually used FAST ramp settings.
After a (training?) quench on June 11, 2015, some SLOW ramp limits values are proposed to be set to a bit lower than the original ones: