Beamline Phone Number:
+44 (0) 1235 778684
Principal Beamline Scientist:
Dr Gianfelice Cinque
Tel: +44 (0) 1235 778410
E-mail: gianfelice.cinque@diamond.ac.uk
Please note: these are the design specifications. Potential users should contact the B22 beamline team to discuss current capabilities.
B22 has two end stations, dedicated to confocal IR micro-spectroscopy and IR imaging. Being designed for optimum performance from the near- to the far-IR, a suite of single and array detectors equip the end stations to cover the whole IR range. The wide range of applications call for a versatile suite of sample environments and sampling methods coupled with off-line facilities for sample preparation and handling as well as data analysis.
| Parameter | Design | |
| Spectral range | 10000 to 20 cm-1 | 10000 to 5 cm-1 |
| Wavelength range | 1 µm to 500 µm | 1 µm to 2000 µm |
| Energy range | 1.2 eV to 2.4 meV | 1.2 eV to 0.6 meV |
| Spectral resolution | 0.2 cm-1 | 0.07 cm-1 |
| | | |
| Max photon flux at beamline exit normalized to Diamond storage ring at 300 mA | 4.9·1013 ph/sec 0.1%bw @ λ=2 µm 3.2·1013 ph/sec 0.1%bw @ λ=10 µm 1.7·1013 ph/sec 0.1%bw @ λ=100 µm | 3.8·1013 ph/sec 0.1%bw @ λ=2.1 µm 3·1013 ph/sec 0.1%bw @ λ=10.87 µm |
| Max photon flux at the sample normalized to Diamond storage ring at 300 mA | 1.2·1013 ph/sec 0.1%bw @ λ=2 µm 7.9·1012 ph/sec 0.1%bw @ λ=10 µm 4.2·1012 ph/sec 0.1%bw @ λ=100 µm | 9.2·1012 ph/sec 0.1%bw @ λ=2.1 µm 8.1·1012 ph/sec 0.1%bw @ λ=10.8 µm |
| 8.5·1011 ph/sec 0.1%bw @ λ=2 mm 5·0.1011 ph/sec 0.1%bw @ λ=10 mm 3·1011 ph/sec 0.1%bw @ λ=100mm | 9·1011 ph/sec 0.1%bw @ λ=2.1 mm 7.5·1011 ph/sec 0.1%bw @ λ=10.8 mm | |
| Beam size at the sample | 2 to 20 μm for microscopy | 3 to 15 μm by 36x objective |
| 2 to 100 μm for imaging | 35 μm expanded spot 74x obj. & 20x cond. in transmission for imaging | |
| Beam stability at the sample | ± 0.1 µm | < 0.05 µm rms of vis beam centroid |
| < 0.1 µm long term drifts | <1 µm sample stage thermal drift | |
| ≤0.05% rms noise/signal on 100% T line | Achieved both in the FTIR sample chamber and under the microscope | |
| Source | | |
| Bending Magnet | Field 1.4 T (λc = 1.48 Å) | Yes |
| 10%-90% DB/Bmax in 273 mm | Yes | |
| Dipole aperture | 50 mrad (H), 30 mrad (V) | Yes |
| -10, +40 mrad (H), -15, +15 mrad (V) | Yes | |
| Optics | | |
| Front-end optics | 1st plane mirror, 2nd focusing mirror | Yes |
| Focusing 1:2.25 vertical periscope | Yes | |
| Cabin optics | 3rd focusing mirror, 4th plane mirror | Yes |
| Focusing 4.69:1 vertical periscope | Yes | |
| Adjustable optics | 7 adjustable (with 2 removable dichroic mirrors) on 2 optical tables | Per end station 12 mirrors: 1 triple optics and 3 mirrors, motor-controlled |
| SR matching to FTIR and optical feedback for beam instabilities | Not necessary |
Please note: Potential users should contact the B22 beamline team to discuss current capabilities.
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