Low temperature probe having transmitting coil and receiving...

Details Low temperature probe having transmitting coil and receiving... Low temperature probe having transmitting coil and receiving...

2007-11-13

2007-11-13

Gutierrez, Diego (Department: 2859)

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

Reexamination Certificate

active

11334439

ABSTRACT:
In an ultrahigh sensitive NMR apparatus, a stability of a temperature of a very low temperature probe coil is improved. A low temperature probe of the high sensitive NMR apparatus is structured at a very low temperature by a cooling apparatus. A cooling medium at a room temperature (300 K) discharged from a compressor is cooled down to 70K by a countercurrent heat exchanger, and is next cooled down to 4K or less by a series of second stages. Further, the cooling medium enters into a low temperature probe via a transfer tube, cools a probe coil to 5 to 10K by a heat exchanging portion, further cools a radiation shield to 40 to 60K, and makes a circuit via the countercurrent heat exchanger. A high temperature stability can be applied to a receiving probe coil in the low temperature probe by a cooling apparatus having a high temperature stability.

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