I14 Control room:
Tel: +44 (0) 1235 778570
Principal Beamline Scientist:
Majid Kazemian
Email: [email protected]
Tel: +44 (0) 1235 778222
Email: [email protected]
Tel: +44 (0)1235 778924
In the endstation, we have a set of removeable sample holders which give us flexibility for different kinds of samples and experiments.
These sit on our stages which have a movement of 1.5mm from centre in each direction (x, y and z).
Our XRF detector sits behind the sample, with four beryllium windows collecting signal in backscatter as well as XANES spectra.
Post sample, there is an optical microscope for finding your region of interest on your sample, that is removed before imaging with the X-ray beam.
Once we are ready to image using X-rays, we can remove the microscope and put in one of our transmission detectors.
For ptychography and differential phase contrast imaging, we use the 'Merlin' detector.
For X-ray diffraction and SAXS (under development) we have an 'Excalibur' detector.
Also available in the hutch is a house nitrogen connection.
For experiments in-situ using liquid or gas phases, we have an in-situ cell available. Liquid or gas is flowed in to a cell created between two silicon chips, with a silicon nitride window in each chip for visualisation. The flow medium can be under constant flow, or flowed in and then left to react. Looped XRF, XANES or XRD scans can then be set up to follow a reaction within the cell.
To discuss how the cell might work for your experiment, please contact one of the beamline scientists.
Information is given below on the current beamline capabilities.
Technical area | Specification | Status |
---|---|---|
Continuous energy range |
5 - 23keV |
Available |
Beam size | 50nm |
50 nm achieved < 100nm routine |
XY sample stage |
Delta Robot x, y, z range 3mm Rotation +/- 180 degrees
|
Available Scanning up to 100Hz |
XRF | Fluorescence lines from 2-23keV 4 element Si drift detector ~ 0.6-0.8 sr solid angle, 1.5Mcps per channel |
Available |
Differential Phase Contrast |
Quad Merlin |
Available |
XANES imaging |
Acquisition using XRF detector Energy changes >1keV approx 5 minutes switching time |
Available |
Diffraction Mapping |
Excalibur 3M - 3 Medipix arrays with each array consisting of 2048 x512 55 x 55um um pixels Roughly 113mm square, with 100Hz frame rate. |
Available |
Ptychography |
Acquisition using Merlin detector
|
Under optimisation |
Tomography |
XRF or diffraction tomography Contact beamline staff to discuss feasibility
|
Under optimisation
|
In situ Sample Environments | Contact beamline staff to discuss potential requirements | Under development |
Element | M1 mirror | M2 mirror | DCM | KB |
---|---|---|---|---|
Type | Bending | Flat | Si-111 | H/V Focusing |
Geometry | Horizontally deflecting 3 mrad |
Horizontally deflecting 3 mrad |
Horizontally deflecting |
Pre-shaped 3 mrad |
Coating | Si (bare), Rh, Pt | Si (bare), Rh, Pt | - | Pt/Rh bilayer |
Other spec | Energy range 5-23 keV Continuously accessible 0.5 eV steps |
Acceptance 150 x 450 um (H x V) |
||
Status | Commissioned | Commissioned | Commissioned | Commissioned |
The Nanoprobe endstation has been designed for multi-modal data acquisition. As such it supports mutliple detectors:
Detector | XRF | Excalibur | Merlin | Eiger | Diode |
---|---|---|---|---|---|
Size |
4 channels arranged in a hemisphere |
1806 x 1548 px 113 x 100 mm total area |
516 x 516 px
|
1028 x 512 px (W x H)
|
20 mm diameter |
Technology | SDD with Cube amplifiers | Medipix 3 | Medipix 3 | Dectris | PIN |
Max. count rate | 1.5 Mcts/ch | 1 Mcts/px | 1 Mcts/px | 1.7 x 109 photons/s/mm2 | |
Max. frame rate | 1 KHz (currently 100Hz) | 100 Hz | 100 Hz | 2000 Hz | - |
Exp. geometry | Backscatter* | Transmission | Transmission | Transmission | Transmission |
Other characteristics |
12.5 um Be window |
Photon-counting | Photon-counting | Photon-counting | Used for XRF It normalization if no other transmission detector is used |
Availability | Available | Available | Available | Commissioning | Available |
* This detector can be used in combination with any of the others in the table
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