Chapter 4. Installation Supplies
34
Installation Planning Guide
01-999021-00 A0100
Ladder (Non-magnetic)
Acquire a 90 to 120 cm (3 to 4 ft) nonferromagnetic ladder for reaching the top of the dewar
while inserting and removing the helium transfer tube. The ladder should be sturdy and self-
supporting with rubber feet.
Hoist
For installing the Oxford magnet, a hoist is required to remove the magnet from the crate,
assemble it, and move it into place. The capacity of the hoist depends on the weight of the
magnet being installed.
specifies magnet weights. Allow a safety factor
of at least 100% above the weight specified in
. Be sure adequate space is available
for bringing the hoist and magnet in through the lab door.
4.2 Recommended Installation Supplies and Equipment
In addition to the required supplies and equipment, the following items are recommended:
•
Cryogenic equipment rack
•
Monitor degaussing coil
Details about each item are presented in the following sections.
Cryogenic Equipment Rack
Various items are used around the magnet for routine maintenance and handling. These
include helium transfer tube, flutter tube, Tygon tubing, stingers, and so on. To protect the
cryogenic equipment from damage and to keep it conveniently available, provide a rack to
hold the items. A 1.2 m
×
2.4 m (4 ft
×
8 ft) peg board hung on a laboratory wall, with wood
or plastic pegs, works very well.
Monitor Degaussing Coil
The workstation monitor can gradually become somewhat magnetized due to its proximity
to the magnet. This condition can be corrected with a degaussing coil. If the host
workstation system is to be located near the edge of the 1–2 gauss stray field of the magnet,
the degaussing coil is a necessity.
