Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Patent
1996-12-03
1998-04-28
Arana, Louis M.
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
62 511, G01V 300
Patent
active
057449597
ABSTRACT:
A NMR measurement apparatus comprising a cryostat (10) in which a superconducting magnet coil system (9) is disposed in a first tank (8) having cryogenic liquid and surrounded by additional cooling devices such as radiation shields (5, 6), superinsulating foil (7) and, if appropriate, a second tank (3) having cryogenic liquid, is characterized by a pulse tube cooler (11) cryotechnically connected to at least one of the additional cooling devices in a good heat conducting fashion with this cooling device being mechanically attached in the cryostat (10) in such a fashion that vibrational and cryotechnical decoupling is achieved between the cooling device and the first tank (8) having the cryogenic liquid and, in particular, between the cooling device and the superconducting magnet coil system (9). The cooling losses of the cryostat are minimized in the NMR measurement apparatus in accordance with the invention so that a nearly uninterrupted operation of the apparatus is facilitated with, however, no field distortions being produced by the cryogenic measures, which would be extremely undesirable, in particular, with a high resolution NMR spectrometer and which would have to be compensated for through extremely difficult technical measures.
REFERENCES:
patent: 3237421 (1966-03-01), Gifford
patent: 4535595 (1985-08-01), Keller et al.
patent: 4953366 (1990-09-01), Swift et al.
patent: 4986077 (1991-01-01), Saho et al.
patent: 5129232 (1992-07-01), Minas et al.
patent: 5181385 (1993-01-01), Saho et al.
patent: 5280247 (1994-01-01), DeMeester et al.
patent: 5404726 (1995-04-01), Janssen
Advances in Cryogenic Engineering, vol. 31, 1986, pp. 517-532, R.C. Longworth: "4K Refrigerator and Interface for MRI Cryostats".
Cryogenics, vol. 34, 1994, pp. 155-158, Y. Matsubara, J. Gao: "Multi-Staged Pulse Tube Refrigerator for Superconducting Magnet Applications".
Di Nardo Silvio
Jeker Rene
Mraz Beat
Arana Louis M.
Spectrospin AG
Vincent Paul J.
LandOfFree
NMR measurement apparatus with pulse tube cooler does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with NMR measurement apparatus with pulse tube cooler, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and NMR measurement apparatus with pulse tube cooler will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1535637