Two models feature HTS coil systems providing 1 T field strengths in 38 and 80 mm bores, with coil cryogenic operating temperatures achieved with a LN2 flow drawn from a standard unpressurised liquid nitrogen dewar. The flow circuit connects to the magnet body via a flexible bellows, offering ease of magnet siting and very low vibration levels in operation. The LN2 flow is maintained by a small rotary pump, which also provides initial system vacuum so no other vacuum pumping station is required. Cool-down is fast (under 5 h for the LN40) and theLN2 consumption is low (<0.5 lph). Features shared with the LM short solenoids include the very low profile and excellent optical access angles, low fringe field through use of a partial iron circuit for the cryostat, ability to operate at any angle, and active magnet protection electronics.
|
Model |
Bore size (mm) |
Peak field (T) |
Height (mm) |
Cryostat OD (mm) |
Max. operating current (A) |
Magnet mass (kg) |
|
LN40 |
38 |
1 |
57 |
208 |
65 |
<15 |
|
LN80 |
80 |
1 |
100 |
250 |
55 |
<35 |
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