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The superconducting magnet MA15 was acquired in 2004. It was paid
partly by PSI, Risø, MaNEP and SNF. 14.9 Tesla is the maximum
field achievable with nowadays technology for a split pair coil (which
is needed for wide angle access). This limit could in principle be
increased to 17.5 by means of a dysprosium insert for small samples.
This option is not (yet) available at SINQ.
A rotatable sample stick has been made at PSI using a similar design at the
ILL. This allows to leave the magnet in a fixed omega position and to
turn the sample orientation within the magnet.
At present, MA15 can only be used on RITA2. However, some
Restrictions have to be obeyed.
Specifications
Cooldown Procedure?
Hanging Issues
- The automatic needle valve control does not work properly. It seems that this
is a mechanical problem of the cold valve. The magnet has sent back to
Oxford Instruments and should be back in the beginning of May 2005.
- The rotatable sample stick has a relatively bad thermal contact. Therefore the
minimal sample temperature is increased. It is not sure if putting more
exchange gas can elimate this problem.
- In order to be used possibly on other instruments, the instruments have to be
checked for magnetic materials around the sample table. After some force
tests, and after eventual modifications of the instrument, the conditions
for a safe operations have to be defined. The next candidate for these
tests is TASP.
Attachments:
ma15c.jpg
ma15b.jpg
ma15d.jpg
ma15a.jpg
This particular version was published on 08-Feb-2005 10:03:09 UTC by MarkusZolliker.
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