SampleEnvironment

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Sample environment at SINQ

Staff

Stephan Fischer, Walter Latscha (technicians)
Ton Konter (magnets)
Markus Zolliker (software, general questions)
Ben van den Brandt (group leader "Sample Environment and Polarized Targets")

Device Lists

On this page, there is some general information about sample environment. For details go to one of

Equipment

The broad range of research topics investigated at SINQ requires not only a large zoo of neutron scattering instruments but also a large collection of sample environment devices. At present, any temperature between 100 mK to 1400 K, any magnetic fields up to 9 T and any high pressure up to 30 kbar may be achieved. The PSI-Risų collaboration helped to complete the sample environment park in the direction to higher magnetic fields and very low temperatures for single crystals.

Closed Cycle Refrigerators

For temperatures between 4 K and 325 K, in general, closed cycle refrigerators are the best choice, as they are very easy to use. Our closed cycle refrigerators are mostly from CTI-Cryogenics, and from APD Cryogenics. The 4 K closed cycle machines are from Sumitomo Heavy Industries. The accuray of the temperature in a closed cycle machine (cold finger principle) is limited. See CTI Test Report on a CTI. For details see closed cycle refrigerators.

Helium Cryostats

For temperature down to 1.5 K, or if a precise temperature is required, helium cryostats should be used. The working horse is the ILL Orange cryostat, manufactured at AS Scientific Products Ltd. For details see He cryostats.

Dilution Cryostats

Dilution cryostats are used for very low temperatures down to millikelvin temperatures.
  • Two dilution cryostats for powder neutron diffraction were built in house. The two devices are to be used one after the other on the same instrument. This enables to change the sample on the instrument every 3 days with only a short loss of beam time.
  • From Risų we have a dilution stick for single crystals. They may be entered into a Helium-4 cryostat or into one of the Oxford Instruments Cryomagnets MA02 and MA09.
For details see dilution cryostats.

Furnaces

Actually, three furnaces are available covering the temperature range between RT and 1800 K. Two are constructed at the PSI. A third device was manufactured at the ILL (now available for AS Scientific). Please contact the sample environment group before any experiment with a furnace, as different aspects have to be discussed in advance. For details see furnace list.

Magnets

Supraconducting magnets are used to achieve magnetics fields up to 15 Tesla. The old 4 Tesla Magnet manufactured by Thor is limited in the temperature range, but has less stray fields and is therefore preferred on instruments with a magnetic environment. The Oxford Instruments Cryomagnets MA02 and MA09 from Risų may be used with sample temperatures from 300 K down to 0.1 K when combined with the dilution stick. For details see magnet list.

Pressure Devices

The clamp cell pressure devices are manufactured at the Institute for High Pressure Physics (RAS Moscow). Pressures up to 30 kbar (3 GPa) may be achieved. For details see pressure devices.

The temperature devices are controlled with the TECS software. A quick help on TECS? is available.

Additional information: vapor pressure


Attachments:  furs.gif  mag.gif  ill.gif  dil_cryomagnet.jpg  ccr.gif 
This particular version was published on 11-Feb-2005 09:49:59 UTC by MarkusZolliker.