WAND Sample Environment

A list of equipment available at HB-2C can be found in the Sample Environment Equipment Database. The database contains detailed equipment specifications and images, drawings and other documents when available.

 

Closed Cycle Refrigerators—Bottom Loader

Typically used for single crystal experiments, the bottom loading CCR has an operating temperature range of 5 K – 300 K (base temperature dependent on particular CCR used).  The standard sample is mounted in a single crystal sample can that has been vacuum sealed with an indium gasket in an inert atmosphere—for high temperature experiments, the indium gasket is omitted.  The distance between the sample mount to beam center is a 2.375” (60 mm).  Cooling to base takes approximately 2 hrs.  High temperature bottom loading CCRs can reach temperatures up to 700 K and have a ¼-28 female interface and a 2.375” (60.3 mm) distance from the sample mount to beam center.  Both standard and high temperature bottom loading CCRs can be tilted to +/- 20 degrees when mounted on the sample goniometer with a translation limit of +/-0.4” (10 mm).  High capacity CCRs are available for use with specialized high pressure cells and have a tilt limit of +/-5 degrees.  Contact the WAND instrument team for more information.

 

Closed Cycle Refrigerators—Janis Top Loaders

Used for both powder and single crystal experiments, the Janis top loading CCR has an operating temperature range of 4 K – 300 K.  The standard single crystal sample is mounted on an aluminum plate or rod and attached to the stick insert.  The powder samples are loaded into aluminum or vanadium sample cans that have been vacuum sealed with an indium gasket in an inert atmosphere (see below for information on powder sample cans), which is then mounted on the insert.  The sample mount is a ¼-28 female thread on the stick insert with a 2.375” (60 mm) distance from the sample mount to beam center.  Cooling to base takes approximately 2 hrs.  The Janis CCR has a high temperature insert available for operation up to 800 K.  Specialized high temperature powder sample cans, described are required for operation above room temperature.  The Janis has a tilt limit of +/-5 degrees with a +/-0.4” (10 mm) translation limit.   

 

Liquid Helium Cryostats—ILL Orange Cryofurnace and Oxford Variox

The top loading liquid helium cryostats have a base temperature of 1.5 K and can be used with ultra-low temperature inserts described below.  Cooling to base takes approximately 1.5 hrs.  The same sample cans as used for the Janis CCR are used for the liquid helium cryostats.  Tilt limits for both cryostats are +/-5 degrees with +/-10 mm translation limit.  The sample mounts on the same ¼-28 female interface.  The distance from the mounting interface to beam center varies from 1.75” (44.5 mm) to 2.44” (62 mm).  The standard bore diameter is 1.9” (50 mm), however 2.75” (70 mm) and 3.937” (100 mm) diameter bores are available on the Orange cryostat for use with ultra-low temperature inserts.  For concerns regarding sample mounting, contact the WAND instrument team.

 

ILL Niobium Foil Vacuum Furnace

The ILL vacuum furnace has an operating temperature range of 30 C to 1500 C (303 K – 1773 K).  Special high temperature plates are used to mount single crystal and high temperature cans for powder samples, described below.  The mounting interface is an M8x1.25 male thread with 1.25” (31.7 mm) distance from the mounting interface to beam center.  The bore is 1” (H) x 1.9” (D)  (25 mm (H) x 50 mm (D)).  The ILL vacuum furnace has a tilt limit of +/-5 degrees with +/-0.4” (10 mm) translation limit.

 

Controlled Atmosphere Furnace (CAF)

The CAF has an operating temperature from 30 C to 1000 C (303 K – 1273 K).  Samples are typically inserted into 1 m long 0.375” (9.5 mm) ID quartz tubes.

 

Cryomagnets

Two vertical field cryomagnets are available for use on the WAND.  Mag-A has a maximum fields of 6 T and Mag-B of 4.5 T.  Both have an operating temperature range of 1.5 K – 300 K and can be tilted to +/-2.5 degrees with a +/0.4” (10 mm) translation limit.  Mag-B has a 1.9” (50 mm) diameter bore and Mag-A a 1.18” (30 mm) bore.  Both have a ¼-28 female sample mount interface at 1.86” (47.2 mm) distance from the mounting interface to the beam center.  Please note that due to weight restrictions, if tilt is required when using Mag-A a non-standard goniometer must be installed.  Contact the WAND instrument team for experiment planning.

 

Ultra-Low Temperature Inserts—Dilution Refrigerator and 3He

Two types of ultra-low temperature inserts are available for use with the Orange and Variox liquid helium cryostats as well as the Mag-B cryomagnet. The Oxford Dilution insert reaches a base temperature of 0.03 K and the 3He insert of 0.3 K.  For powder samples, copper lids on either copper cans (dilution) or aluminum cans (3He) are used for ultra-low temperature experiments. Tilt limits are reduced to +/-3 degrees with use of these inserts. 

 

Pressure Cells

A 6 kbar Al-helium gas pressure cell is available for use in an Orange cryostat for in situ pressure changes.  Various BeCu clamp pressure cells (up to 2 GPa) are available for higher pressure experiments.  The pressure capabilities and currently expanding.  Contact the WAND instrument team for more information.

 

Additional Sample Environments

Additional custom specialized sample environments may be accommodated at the WAND—e.g. gas flow, liquid flow, electric field, etc.  Users are strongly encouraged to discuss experimental needs with the WAND instrument team before requesting custom sample environments for their proposals.

 

Sample Holders

Various sample holders are available for single crystal sample mounting with custom mounts provided as needed.  Detailed information about the various powder sample cans mentioned above, dimensions and photos, is in the following document from the HB-2A instrument team.