XPDF (I15-1) is the dedicated X-ray Pair Distribution Function beamline. XPDF is applicable to a diverse range of disciplines such as materials chemistry, solid-state physics, earth sciences and pharmaceuticals.
Researchers are able to study the local structure of crystalline, semi-crystalline and amorphous solids and liquids with a speed and robustness which has not been possible at Diamond before. The beamline optics and endstation have been optimised to give the high X-ray energy, high flux and low background signal which are necessary for quality PDF data.
XPDF typically operates with two large area detectors, one placed close to the sample to the provide the large Q range required for quality PDF data (Qmax up to 40 Å–1 at 76.7 keV) and one mounted further from the sample for simultaneous higher-resolution Bragg data.
I15-1 is currently accpeting proposals for the AP29/30 user call (21st June-21st December 2021) with a deadline of 3rd March 2021. The types of experiment we can run will depend on Diamond’s COVID-19 operational level. There are two likely levels:
All AP29/30 proposals should explicitly state which of the two likely operational levels are required for the experiment. Please discuss all proposals with beamline staff via email@example.com prior to submission.
Please note that we are still working through our backlog of user experiments from previous calls. Unscheduled reserve proposals for I15 and I15-1 from AP28 will be rolled forward into AP29/30. However, proposals from AP27 and earlier that are not already scheduled to be run before the end of March will be cancelled. If you still require the beamtime, please re-submit an updated proposal with a note explaining that it was previously awarded time but that it was not possible to run the experiment. If you require an update on your experiment, please contact firstname.lastname@example.org.
Rapid Access submission is also open for experiments that require mail-in beamtime at short notice. The time available is limited, so please discuss your proposal with email@example.com before submitting.
Some information on beamline equipment is listed below.
|Beam size at focus||
700 μm horizontal by 10 μm vertical
Standard size at sample 700 μm x 150 μm
40.0, 65.4 and 76.6 keV
700 μm horizontal focussing
|Multi-layer mirror||10 μm vertical focussing||Available|
Perkin Elmer XRD 1611 CP3
409.6 × 409.6 mm2 active area
100 μm pixel size, 4 Hz read-out
|Secondary detector||Perkin Elmer XRD 4343 CT
432 × 432 mm2 active area
150 μm pixel size, 15 Hz read-out (TBC)
|XY sample stage||
250 mm (h) × 450 mm (v) travel
5 kg load capacity
|Single capillary spinner||10 Hz capillary spinner||Available|
|Multi-capillary spinner||15 position sample changer||Available (14 positions operational)|
|Hot air blower||350 - 1100 K||Available|
|Cryojet||90 - 500 K||Available|
Zero-background capillary cell for hydrothermal reactions
RT - 473 K
|Available, but not for mail-in experiments (contact beamline staff for details)|
Capillary cell for flowing gas experiments.
A limited set of gasses is currently available.
Can be used with the hot air blower.
|Commissioning (contact beamline staff for details)|
|eChem system||8-channel Ivium-n-Stat electrochemical analyser for battery cycling, impedance analysis and more.||Available, but not for mail-in experiments|
See the sample environment page for more details on the equipment available. New sample environment equipment is always in development. For more information about proposed experiments please contact firstname.lastname@example.org.
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