Ultra Low
Loss
Superconducting Magnet System
August 2000
An ultra low loss superconducting magnet and He-3 cryostat system has been
developed for application in low vibration atomic force microscopy. The
system includes a superinsulated liquid nitrogen shielded dewar with a 50 liter
helium capacity with a 9 Tesla superconducting magnet and a He-3 cryostat.
The He-3 cryostat reaches a temperature of 0.27 K, with no pumping at the 1 K
pot, thus eliminating any vibrations that are transmitted from the attached pump
and pumping line. The system has an evaporation rate of 4 liters of liquid
helium per day, with the He-3 cryostat in operation (at 0.27 K), and no current
in the leads. The hold time of the He-3 is longer than 140 hours, with no
added heat load.
Contact Janis
today for more information about this latest development in ultra low loss
superconducting magnet systems for all types of atomic force and scanning probe
microscopy.
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