Beamline Phone Number:
+44 (0) 1235 778684
Principal Beamline Scientist:
Dr Gianfelice Cinque
Tel: +44 (0) 1235 778410
E-mail: [email protected]
Email: [email protected]
Tel: +44 (0)1235 56 7675
Please note: these are the design specifications. Potential users should contact the B22 beamline team to discuss current capabilities.
B22 has two FTIR coupled with microscopes end stations, dedicated to confocal IR micro-spectroscopy and IR imaging, plus one Atomic Force Microscope for nanoFTIR in photothermal and scattering modes.
It has been designed for optimum specifications in the mid-IR, with enhanced performances in the far-IR, and a suite of instrumentation allows to cover on the same end stations the whole IR range from the near-IR to the THz regime.
Parameter |
Design |
Actual at Sample |
Spectral range |
10000 to 20 cm-1 |
10000 to 10 cm-1 |
Wavelength range |
1 µm to 500 µm |
1 µm to 1000 µm |
Energy range |
1.2 eV to 2.4 meV |
1.2 eV to 1.2 meV |
|
|
|
Beam size at the sample |
< 20 μm for microscopy (scanning) |
15 μm FWHM by 36x objective quasi-confocal by slits down to 3 μm |
imaging (FPA detector) |
35x35 μm2 Field of View at 74x 128x128μm2 Field of View at 20x |
|
Beam stability at sample |
± 0.1 µm |
< 0.05 µm rms beam centroid |
< 0.1 µm long term drifts |
<1 µm sample stage thermal drift |
|
Signal stability |
s/n >2000 |
s/n>10000 in 30s at FTIR
|
The spectral Brilliance of MIRIAM beamline compared with a conventional thermal infrared source. The coherent (CSR) modes are available in special conditions of the Diamond storage ring.
Potential users should contact the B22 beamline team to discuss current capabilities.
design |
actual |
|
Source | bending and edge radiation | |
Bending Magnet |
Field 1.4 T (λc = 1.48 Å) |
|
10%-90% DB/Bmax in 273 mm |
||
Dipole aperture |
50 mrad (H), 30 mrad (V) |
|
-10, +40 mrad (H), -15, +15 mrad (V) |
||
Optics |
|
|
Front-end optics
|
1st plane mirror, 2nd ellipsoidal mirror |
|
DeFocusing ca. 1:2 vertical periscope |
||
Cabin optics |
3rd ellipsoidal mirror, double 4th plane mirror |
|
Focusing ca. 4:1 vertical periscope |
||
coupling optics |
7 manually adjustable mirrors per 2 optical tables |
12 mirrors manually adjustable mirrors 1 triple optics (3 thoroidal mirrors) 2 motor-controlled for pitch-roll mirrors |
97-actuators controlled double deformable mirror system | ||
optical feedback for beam instabilities |
Not necessary |
Diamond Light Source is the UK's national synchrotron science facility, located at the Harwell Science and Innovation Campus in Oxfordshire.
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Harwell Science & Innovation Campus
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Oxfordshire
OX11 0DE
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