| Source |
NW14A has double undulators with the different period length, U36 and U20.
- In-vacuum undulator, U36 (periodic length 36 mm):
Covers an energy range of 5 to 25 keV with 1st, 3rd, and 5th harmonics. It is used as a high intensity monochromatic X-ray source with a double crystal monochromator and a focusing mirror. The typical photon flux of the monochromatic beam is estimated to be ~1012 photons/sec.
- In-vacuum undulator, U20 (periodic length 20 mm):
Generates first harmonics in the energy range of 13 to 20 keV, with an energy bandwidth of ΔE/E ∼ 10-1 to 10-2, and can be used as a "narrowband white light source" or "broadband monochromatic light source" with a photon flux of ∼ 1015 photons/sec.
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| Optics |
The front end consists of a fixed mask, a beam-position monitor, an absorber, a beam shutter, a graphite heat absorber, XY-slits for white X-rays and Be windows. The main optical components are a double-crystal monochromator and X-ray mirror system, which are located 30.5 m and 39-42 m from the center of insertion device U20, respectively. The double-crystal monochromator consists of flat Si(111) crystals, which are cooled with liquid nitrogen in order to reduce any deformation caused by the heat loads. The cooling system can handle an incoming heat load of up to 450 W. The X-ray mirror system has 3 mirror assemblies: a bent cylindrical mirror for focusing of X-rays, and a double-mirror system (cut-off mirrors) to reduce a contamination of the higher harmonics.
- Monochromator (at 30.5 m):
Si(111) double crystal monochromator with liquid nitrogen cooling
- Focusing Mirror (at 39 m):
Rhodium coated silicon single crystal (Toroidal, 1000 mm (L) x 100 mm (W) x 70 mm (T) ) with 2.8 mrad glancing angle
- Cut-Off Mirror (at 41.5 m):
Rhodium coated silicon single crystal (Flat, 1000 mm (L) x 100 mm (W) x 70 mm (T), a double-mirror system)
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| Energy range |
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| Resolution (ΔE/E) |
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| Beam size |
- Focusing mirror:
0.5 mm(H) x 0.2 mm(V)
- Focusing mirror + capillary lens (for XAFS/XES):
0.05 mm(H) x 0.05mm(V)
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| Photon flux |
- 1 × 1012 photons/s (15 keV)
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| Instruments |
- MHz fs-laser, CB3-80W (for XAFS, XES, XRD)
https://lightcon.com/wp-content/uploads/datasheets/Light-Conversion_CARBIDE-Unibody-Design-Femtosecond-Lasers_20230904.pdf
350 fs, 1 ~ 2MHz, 1030 nm, 80 W
HH: 515, 343, 257 nm (10~100 uJ),
OPA: 210~2600 nm (1~10 uJ)
- kHz fs-laser, Legend Elite Duo HE+ (for WAXS, SAXS, XRD)
https://www.coherent.com/content/dam/coherent/site/en/resources/datasheet/lasers/COHR_LegendEliteDuoHEplus_DS_1019_3.pdf
110 fs, 1 kHz, 800 nm, 13W
HH: 400, 266 nm (1~3 mJ)
OPA: 240~13000 nm (10~1000 uJ)
- 10Hz ns-laser, Powerlite DLS 8000 (for single shot XRD, WAXS, SAXS)
https://amplitude-laser.com/wp-content/uploads/2019/03/Powerlite-DLS-8000_ref-f.pdf
1064, 532, 355, 266 nm, 10 Hz, 10 ns, 1-10 W
OPO: 220-2700 nm, 10 Hz, 10 ns, 20-900 mW
- Huber 2-circle diffractometer (Huber)
- MarDTB, 2-circle diffractometer (MarCCD)
- Cryo Cooler 700, Liquid Nitrogen flow cooler (Oxford Cryosystems)
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| Detectors |
- X-ray CCD (SX165, Rayonix)
- High-speed scintillation probe (OKEN)
- Pixel detector (Pilatus100K, Dectris)
- Pixel detector (EIGER2 X 1M, Dectris)
- Digital BOXCAR (UHFLI 600 MHz, Zurich Instruments)
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| Remote / Mail-in |
- If entry to Japan is restricted due to the outbreak of infectious diseases, foreign users can conduct remote measurements.
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| Special notes |
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