Figure 5: (a) The magnet chamber was cleaned with Kim wipe (ethanol) and then subsequently purging with He-gas
prior to attaching the cold-head. (b) Disassembling the refurbished cold-head from the casing by unscrewing the 4
hex screws.
After connecting cold-head to the magnet, it has to be purged with He-gas prior to re-connecting the flux lines-
otherwise the flux lines and the He-compressor will be contaminated.
Figure 6: (a) The He-compressor is powered off. (b) The main power is turned back on. For purging the cold head
without connecting the flux-lines, the cold-head drive should be turned on (c): however in the image it is off). Cold-
head drive switch should be turned off after reconnecting the flux lines and the He-compressor in the normal
operational mode.
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