Common Sample Cells and Environments at ID2A - PIPOXS

Standard Sample Cells

While PIPOXS is a flexible endstation capable of accommodating a wide variety of sample cells and environments, we do have some "standard" cell designs that may be required, depending on the experiment. Diagrams of these are provided below, together with the experimental setups that may require them.

FLOW CRYOSTAT CELL

This is our current generic sample cell for powder samples and is compatible with room temperature measurements and both the displex and flow cryostats. It is the required cell for the flow cryostat.

OLD DISPLEX CELL

This is the former generic powder sample cell and works for room temperature measurements and the displex cryostat.

HTA CELL

This is the required sample cell for high throughput access mode samples. Also compatible with the displex cryostat.

Displex Cryostat

The displex cryostat is mounted to DAVES and can be used for XES / HERFD as well as (less typically) for fluorescence XAS. This cryostat maintains the sample in vacuum and relies on conductive cooling through a copper cold finger to cool the sample. The nominal base temperature is ~15 K and can be varied up to room temperature via an attached heater; the actual temperature of the sample will depend on the size of the sample and the thermal conductivity of its mounting hardware. Samples are attached to the cold finger via a 1 mm wide slot and held in place through a set screw; a "standard" sample cell is shown below, though sample dimensions up to 25 mm wide by 30 mm tall can be accommodated.

LN₂ Flow Cryostat

In addition to the displex, a flow cryostat is also available. This cryostat uses actively flowing cryogen to maintain the sample at a desired temperature and thus can achieve better thermal stability for larger and less thermally conductive samples. As with the displex, a heater allows temperature adjustment from base temperature (~80 K) up to room temperature. LN₂ is the default cryogen, though liquid helium is also an option at user expense and subject to availability. The sample cells that can be accommodated by this cryostat is shown below; unlike the displex, nonstandard cells likely CANNOT be accommodated.

IMAGE GOES HERE

Electrochemical Cell

Coming soon...

Others

Other, non-standard sample environments can also often be accommodated. If you're interested in measuring something incompatible with the above listed environments, reach out to the beamline scientist for more information.

-- ChrisPollock - 09 Dec 2022