Beamlines List
BL2A Soft X-Ray Beamline for Photoabsorption Spectroscopy
▼Description
BL2A, which was moved its previous location as BL1A in 2011, is a soft X-ray beamline for photoabsorption spectroscopy. The beamline is equipped with a focusing premirror and a double-crystal monochromator [1]. The monochromator serves soft X-rays in the energy region from 585 to 4000 eV using several types of single crystals, such as ß-Al2O3, beryl, KTP (KTiOPO4), quartz, InSb, and Ge. The throughput spectra measured using a Si photodiode (AXUV-100, IRD Inc.) are shown in Fig. 1. The typical energy resolution (E / ΔE) of the monochromator is approximately 1500 for beryl and InSb. There are no experimental setups that are specific to this beamline, except for a small vacuum chamber equipped with an electron multiplier (EM) detector. Photoabsorption spectra for powdery samples are usually measured in total electron yield mode, with the use of the EM detector.
[1] Hiraya et al., Rev. Sci. Instrum. 63 (1992) 1264.
| Fig. 1. Throughput spectra of the double-crystal monochromator at BL2A. | Fig. 2. Side view of BL2A. |
▼Technical Data
| Monochromator | Double crystal monochromator |
| Monochromator crystals: (2d value, energy range) |
β-Al2O3 (22.53 A, 585-1609 eV), beryl (15.965 A, 826-2271 eV), KTP (10.95 A, 1205-3310 eV), quartz (8.512 A, 1550-4000 eV), InSb (7.481 A, 1764-4000 eV), Ge (6.532 A, 2094-4000 eV) |
| Resolution | E/ΔE = 1500 for beryl and InSb |
| Experiments | Photoabsorption spectroscopy (total electron yield using EM and partial fluorescence yield using SDD) |
