Instruments by Science Group
Macromolecular
Soft Condensed 
Imaging and
Biological
Magnetic
Structures and
Crystallography 
Spectroscopy I21 Contacts
Principal Beamline Scientist:
Mirian Garcia Fernandez
Tel: +44 (0) 1235 778360
E-mail: mirian.garcia@diamond.ac.uk
Science Group Leader
Sarnjeet Dhesi
Email: sarnjeet.dhesi@diamond.ac.uk
Tel: +44 (0) 1235 778056
I21 Inelastic X-ray Scattering
Status: Operational
Energy: 0.20 - 3.0 keV
Source
| Insertion Device | 5 m helical undulator |
| Minimum magnet gap | 20 mm |
| Magnet period | 56 mm |
Beamline
| Energy range: |
250 - 3000 eV
|
| Photon Polarisation: |
250 - 3000 eV (LH) 450 - 3000 eV (LV) 450 - 1500 eV (circular) |
| VLS gratings |
VPG1 - 600 l/mm2 VPG2 - 1000 l/mm2 VPG3 - 2000 l/mm2 VPG4 - 1200 l/mm2 |
|
Combined energy resolution at 930 eV |
100 meV (high flux mode) 60 meV (high resolution mode) 35 meV (ultra-high resolution mode) |
| Beam size at sample with full flux | 40 (H) x 2.5 (V) µm2 |
Sample environment
| Sample space | 10 (L) x 10 (W) x 5 (H) mm3 |
| Sample type | solid |
| Temperature range: | 10 - 380 K |
| Manipulator | 6 DOF |
| th (incident angle) | -180° to +175° |
| phi (sample rotation) | -90° to +90° |
| chi (sample tilt) | -30° to +45° |
| cleaving | In-vacuum RT cleaving |
I21 does not offer a sample environment with an applied magnetic field. Users can mount a permanent magnet below the sample. For this purpose, permanent magnets of approx 150mT are available in I21.
Spectrometer
| Spectrometer length | 10320 - 15520 mm |
| Scattering angle | 0o < 2θ < 154o |
| Energy range |
250 - 930 eV (SVLS1, high throughput) 450 - 1500 eV (SVLS2, high resolution) 2000 - 3000 eV (SVLS3) |
| VLS gratings |
SVLS1 - 1500 l/mm2 SVLS2 - 2700 l/mm2 SVLS3 - 1500 l/mm2 (Multilayer Grating) |
| Detector |
CCD, pixel size: 13.5 x 13.5 µm2 |
Polarimeter
At the moment, only the polarimeter multilayers for the following edges and geometries have been commissioned. If the needed edge is not listed, please, comtact the beamline staff.
| Edges | Spectrometer grating | Polarimeter geometry |
| Cu, Ni L3 | SVLS1 | Horizontal |
| Cu, Ni L3 | SVLS1 | Vertical |
| Cu, Ni L3, O K | SVLS2 | Horizontal |
| Ni L3, O K | SVLS2 | Vertical |
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Oxfordshire
OX11 0DE
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