MA15

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The superconducting magnet MA15 was acquired in 2004. It was paid partly by PSI, the Carlsberg Foundation and the Danish National Science Foundation, 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?

Pending Issues

  • The automatic needle valve control does not work properly. It seems that this is a mechanical problem. The magnet was 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 16-Mar-2005 09:08:30 UTC by MarkusZolliker.