• PSI
• the Carlsberg Foundation and the Danish National Science Foundation (danish: FNU)
• MaNEP
• 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.

Omega Motor Change on Rita2

Specifications

Cooldown Procedure?

Pending Issues

• The automatic needle valve does not always work properly. A mechanical problem was solved by Oxford Instruments. It is still a problem that sometimes the needle valve bar gets frozen. This problem might be avoided when keeping warm the top of the needle valve during fill. However, at high fields, the air dryer might not work!

• The nitrogen level gauge does not work. This has to be fixed, but it seems that it may appear often.

• During He-fill, LN2 has to be filled again in order to avoid air sucking into the LN2 dewar.

• The rotatable sample stick has a relatively bad thermal contact. Therefore the minimal sample temperature is only about 2.5 K. It seems that increasing the amount of exchange gas does not help until it begins to condensate at the heat exchanger. If the scattering from the exchange gas does not disturb the measurement, achieving something around 1.8 K should be feasible.

• 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.