| 摘要 |
PROBLEM TO BE SOLVED: To provide a cryohead capable of guaranteeing minimum and constant absolute temperature in a reception coil. SOLUTION: This nuclear magnetic resonance (NMR) measuring cryohead 1 has: a detection channel for receiving an NMR signal; a transmission and decoupling channel; different radio frequency (RF) coils or resonators 11, 12, 12b provided to the different channels; and heat exchangers 14, 15 capable of being cooled by helium. The RF coils or resonators 11, 12, 12b of the transmission or decoupling channel, and the detection channel can be cooled to a very low temperature. The first heat exchanger 14 cools the RF coil or resonator 11 of the detection channel, while the second heat exchanger 15 cools the RF coils or resonators 12, 12b of the transmission or decoupling channel. The first heat exchanger 14 is separated from the second heat exchanger 15. COPYRIGHT: (C)2005,JPO&NCIPI
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