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New High Field Dry Magnets
NCNR is acquiring two new cryogen-free superconducting magnets for use on neutron instruments. Mechanically cooled, these magnets will provide simple, reliable, high-field capabilities without the cost and operational complexity issues associated with conventional wet magnets. The first of these to be delivered, 12 T Dry, is a high-field magnet with an integrated dilution refrigerator. It is currently under commissioning.
12 T Dry Specs:
- Symmetric vertical magnetic field: ± 12 T
- Integrated 50 mK dilution refrigerator
- 35 mm split
- Vertical beam divergence ± 4°
- Horizontal dark angle 40°
Later in 2025, NCNR is scheduled to receive 7 T Dry, a lower field but more versatile cryogen-free magnet
7T Dry Specs:
- Symmetric vertical magnetic field: ± 7 T
- Offset coil option for use with polarized neutron beams
- 35 mm split
- Vertical beam divergence ± 4°
- Horizontal dark angle 40°
- 50 mK dilution refrigerator insert
- 300 mK 3He dipper insert
- High temperature sample stick: 1.5 K - 700 K
- Rotational & vertical translation stage
Both new magnets should be available for users upon resumption of NCNR scientific operations in 2026.