1000 Mhz NMR, 23.5 Tesla magnet

Discussion in 'General Science' started by bertus, Jul 22, 2009.

  1. bertus

    Thread Starter Administrator

    Apr 5, 2008
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    Last edited: Dec 13, 2013
  2. KL7AJ

    AAC Fanatic!

    Nov 4, 2008
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    Ay, Caramba!
     
  3. Dave

    Retired Moderator

    Nov 17, 2003
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    A bargain at $16 million (USD)!

    I was interested in MRI using mT magnets at one point, and I recall someone reporting a 46μT system last year. The scope for MRI is staggering.

    Dave
     
    Last edited by a moderator: Dec 13, 2013
  4. Bob S

    New Member

    Jun 15, 2009
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    Can you put this magnet into the persistent current mode, like MRI magnets?
     
  5. bertus

    Thread Starter Administrator

    Apr 5, 2008
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    Hello,

    The magnet is superconducting.
    The current is charged in the coil, then the cryoswitch is closed and the magnet is persistent.
    (the current stays in the coil).
    To keep the current flowing it is cooled down with liquid helium.
    To reach a even lower temperature the magnet is pumped (see the hoses on top).

    Greetings,
    Bertus
     
  6. Duane P Wetick

    Active Member

    Apr 23, 2009
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    What is the application for this super-magnet? I worked for a company which produced a 5 Tesla DC magnet which used liquid helium to cool the coil for superconducting. It was used for separating iron particles from clay slurry used in paper making, in an expanded metal matrix. Unfortunately, the system had a coil failure which allowed the liquid helium (20,000 litres @ $4.00 US / litre) to escape. The system was later converted to a water cooled design.

    Regards, DPW
     
    Last edited: Jan 17, 2010
  7. bertus

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  8. jpanhalt

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    High-field NMR is also used for analysis of lipids in body fluids, including lipoproteins for cardiovascular risk assessment.

    John
     
  9. ramueller11

    New Member

    Dec 13, 2013
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    Small world, bertus. I routinely work with a AVIII 750 MHz spectrometer, also a 2K pumped magnet. I'd be interested to learn more about both the superconducting magnet and the spectrometer electronics. It seems to me the console is a precision radio station..except the music is a bit weird.

    I think an interesting project for me would be to build a crude NMR spectrometer from a rare-earth magnet and use spin echos to obtain a FID.

    Cheers!
     
  10. bertus

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