BL43IR OUTLINE
Inquiry number
INS-0000001427
ABSTRACT
BL43IR is the first infrared beamline at SPring-8, the second in Japan next to UVSOR BL6A&B, and also the first between three large third-generation synchrotron radiation (SR) facilities: ESRF, APS and SPring-8. Infrared beamlines at the small SR facilities are frequently found around the world, for example, at NSLS, ALS, BESSY, ANKA, MAX-lab, SRS, SOLEIL and UVSOR. Compared to these, BL43IR at SPring-8 has the advantage of a highly brilliant infrared light emitted from a bending magnet with a large bending radius of 39.3 m. This high brilliance of infrared light is good for applications in microscopy. Our two infrared microscopes at BL43IR are designed to utilize the brilliant infrared SR. One has a set of large Schwarzschild mirrors with a large clearance (100 mm) between them, which makes it possible to use various attachments such as a diamond anvil cell and a cryostat. Another has a 14T superconducting magnet and is capable of conducting measurements under multiple extreme conditions of low temperature, high pressure and high magnetic field. Our users are from various fields including physics, materials science, chemistry, polymer science, biology, medical science, archaeology, earth science, and more. We encourage prospective users to consider using BL43IR. To take full advantage of this beamline, the following facts would be helpful.
Infrared synchrotron radiation at BL43IR shows high brilliance
The flux (power) of the infrared SR at BL43IR is comparable to that of a conventional thermal radiation (TR) source such as a globar and is less intense than that of other major infrared SR beamlines. This is because we have rather low storage current (100 mA) at SPring-8 and a narrow angular acceptance (H:36.5 mrad, V:12.5 mrad) at the infrared extracting mirror at the storage ring. The brilliance (power per unit area and angles), however, is much higher than that of TR and some SRs. This is because the infrared SR at BL43IR has highly collimated beam of light. The conventional TR must be reduced its throughput with an aperture when irradiating on a small sample with the area of interest, for example, 10 micron, which degrades the signal-to-noise ratio of the spectra. The infrared SR at BL43IR is, on the other hand, capable to be focused on 10 micron area without using any apertures. High brilliance of the light works brilliant for the microscopes.
SPring-8 is a highly stable synchrotron radiation
A conventional TR is a quiet light source and an infrared SR is inherently noisier than TR. This is because an infrared SR suffers from both of low frequency mechanical vibration and high frequency electron fractuation, which leads to low signal-to-noise ratio of spectra. In a situation with higher flux benefit found in some SRs, the noise would be of less concern. This is unfortunately not the case with BL43IR. The state-of-the-art beam stabilization at SPring-8, however, enable us to provide highly stable synchrotron radiation. Together with the brilliance advantage, we are able to show higher signal-to-noise ratio of spectra at the microscopes compared to TR and SRs. Unlike other SRs, we also have the top-up operation that provides practically constant flux of light throughout the measurements.
AREA OF RESEARCH
- Infrared microspectroscopy
- Magneto-optical spectroscopy
KEYWORDS
- Scientific field
Physics, Chemistry, Biology, Archaeology, Earth science, Polymer science, Materials science, Medical science, Industrial research - Equipment
Infrared microscope, Magneto-optical microscope
SOURCE AND OPTICS
- Frontend
- Brilliance
- FTIR - Bruker IFS120HRX
- Wavenumber region : 100 ∼ 20,000 cm-1
- Beam splitter : Vis/Quartz, NIR/Quartz, Ge/KBr, Mylar 3.5 and 6 µm
- Internal light source : Globar, W-halogen
- Internal detector : Si diode, Ge diode, MCT, FIR-DTGS
- External detector : Si diode, InSb, MCT, Si bolometer
- Effective wavenumber resolution : ∼ 0.1 cm-1
- Infrared rays at Sample
Energy Range 100 ~ 20000 cm-1 Energy Resolution ΔE/E ~0.1 cm-1 Beam Size 0.01mm2
EXPERIMENTAL STATIONS
PUBLICATION SEARCH
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CONTACT INFORMATION
Please note that each e-mail address is followed by "@spring8.or.jp."
Taro MORIWAKI
SPring-8 / JASRI
1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198
Phone : +81-(0)791-58-0832
Fax : +81-(0)791-58-0830
e-mail : moriwaki
Yuka IKEMOTO
SPring-8 / JASRI
1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198
Phone : +81-(0)791-58-0832
Fax : +81-(0)791-58-0830
e-mail : ikemoto