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Year Hold Magnet with greatly improved retention time of liquid helium
New 400 MHz Year Hold Super Conducting Magnet (400JJYH) has a greatly improved retention time of liquid helium while keeping its compact size as is. 400JJYH is a newly-developed magnet of reduced frequency of helium refill to once every year, while keeping cryostat compact. Newly-developed super conducting magnet has smaller stray magnetic field from the inside of the magnet to the outside. Combination with a compact spectrometer unit of ECZ NMR Spectrometer enables freer installation layout and placement of all units in a small area. In addition, as the design of the magnetic shield of SCM not only reduces the stray magnetic field, but also the influences from outside, installation of several NMR systems nearby is possible. It can offer a more reliable, safer, and comfortable use of the NMR system.
- Refill frequency of liquid helium is now once a year
- Compact size same as regular 400 MHz magnet
- Freer layout of installation room
|400JJYH(New Type)||400SS(Conventional Type)|
|Center magnetic field||9.39 T (1H 400 MHz)||9.39 T (1H 400 MHz)|
|Field stability||≦4 Hz/h||≦4 Hz/h|
|Room temperature bore diameter||54 mm||54 mm|
|Stray magnetic field (0.5mT / 5G)|
|Vertical direction(from field center)||1.00 m||1.48 m|
|Horizontal direction(from field center)||0.5 m||0.95 m|
|Volume of He reservoir||120 L||68 L|
|Hold time /Liquefier off||≧365 日||≧200 日|
|Volume of N reservoir||63 L||67 L|
|Hold time /Liquefier off||≧14 日||≧15 日|
|Outer diameter||0.795 m||0.795 m|
|Ceiling height (incl. anti-vibration mechanism)||≧2.84 m||≧2.84 m|
|Operational Weight (excl. anti-vibration mechanism)||約461 kg||約448 kg|
*Hold time is a calculated value based on the refill volume and evaporation speed(when atmosphere pressure is stable).
*When NR-50 (Liquid Nitrogen Replenishment System） needs to be attached, the above-written installation room ceiling height is adequate.
*Specifications guaranteed when no modification or addition is made, and subject to change without notice.