National High Magnetic Field Laboratory, NHMFL
CONTACTS
NHMFL at
Los Alamos National Laboratory Los Alamos, N.M. 87545 Voice 505.667.5032 Fax 505.665.4311  |
Pulsed Magnets Pulsed magnets fall into two general classes: NON-DESTRUCTIVE and DESTRUCTIVE. Capacitor-driven Field strength: 50 - 70 T, Period: 20 - 800 ms* (available now at NHMFL) ac power driven (Long-Pulse, adjustable pulse shape) Field strength: 40 - 60 T, Period: 2 sec (>100 ms**) (available now at NHMFL) Capacitor + ac power Field strength: 80 - 100 T, Period: 20 ms (in design/construction stage at NHMFL) Destructive pulsed magnets sidestep the strength of materials problem and are designed to explode with every pulse. Since the intense magnetic field exists only as long as it takes a shock-wave to propagate through the magnet the pulse duration is limited to a few microseconds. The highest magnetic fields are achieved by explosively compressing the magnetic field into the sample (although the sample is destroyed with each pulse!) Single turn coil (capacitor-driven) Field strength: 100 - 250 T, Period: 4 - 8 microsecond (under construction) 'Strip generator' (chemical + capacitor) Field strength: 100 - 250 T, Period: 5 - 10 microsecond (available at LANL through collaboration and external funding) 'Imploding liner' (capacitor) Field strength: 400 - 550 T, Period: 4 - 8 microsecond (being developed for programs in high energy density physics at LANL, also available at ISSP, University of Tokyo) Multi-stage generator (chemical + capacitor) Field strength: 1000 T plus, Period: 4 - 8 microsecond (available at LANL through collaboration and external funding, also available at Sarov, Russia) Notes: T (tesla) is 10,000 gauss * total pulse length, including decay ** duration at constant field (flat-top) ms is 0.001 second microsecond is 0.000001 second Magnetic Field Generation Capabilities 60 T Long Pulse (Motor-Generator Driven) magnet (under construction) 65 T Short Pulse (Capacitor Driven) 50 T Short Pulse (Capacitor Driven) 50 T Long Pulse (Capacitor Driven) 20 T Superconducting Magnet 100 T Magnet (Motor-Generator and Capacitor Driven) (under construction) 300 T Single Turn Coil |
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