A horizontal dilution refrigerator for polarized target
Abstract
A horizontal dilution refrigerator was constructed with a view to the spin drozen target amd deuteron polarized target. High cooling power at high temperature such as 3.7 mW at 400 mK serves for overcoming a heat load of microwave to polarize the nuclear spins in the target material. The cooling power at 50 mK was 50 μW, which is sufficient to hold the high nuclear polarization for long time. The lowest temperature reached was 26 mK. The refrigerator has rather simple heat exchangers, a long stainless steel double tube heat exchanger amd two coaxial type heat exchangers with sintered copper. The mixing chamber is made of polyterafluoroethylene (TFE) and demountable so that the target material can be easily put into it.
- Publication:
-
Nuclear Instruments and Methods
- Pub Date:
- August 1978
- DOI:
- 10.1016/0029-554X(78)90401-9
- Bibcode:
- 1978NucIM.154..213I