Bent Crystal Laue Analyser
The FMB Oxford BCLA is a versatile, narrow bandpass filter that can enable you to achieve the ultimate performance in a variety of applications, including XRF and XAFS experiments at a synchrotron beamline.
The system, which is compatible with a variety of back-end detectors, rejects undesired x-ray photons (e.g. scattering and fluorescence from other elements in the sample) before they can be detected; drastically improving signal to noise ratio.
The core of the BCLA is a silicon crystal, which is bent into a logarithmic spiral such that X-rays of a selected wavelength are diffracted towards the detector; whilst background radiation is blocked by Soller slits. The slit material, crystal shape, and geometry of the BCLA are carefully optimised for a particular working energy range.
Integration simplicity
| Compatible with numerous detectors: scintillation tubes, ion chambers, and sold state arrays |
| Beam requirements easily achievable from modern synchrotron beamlines and many laboratory sources |
Ease of use
| Rapid alignment using a generic x-y stage |
Ultimate performance
| Very narrow bandpass |
| Large angular acceptance |
BCLA Specifications
| Input beam size | ~100μm in diffracting plane (generally vertical direction) ~1mm in perpendicular direction |
| Bandpass | 10 – 100eV |
| Input energy ranges | 5.3, 6.4, 7.5, 8.4, 9.5, 11.4, 13.6, 16, 18.4, 22 KeV |
Ordering Info
| Energy | Fluorescence lines | Part No. |
|---|---|---|
| 5.3keV | Kα: V, Cr, Mn Lα: Ce, Pr, Nd, Pm, Sm, Eu | BCLA0053 (check availability) |
| 6.4keV | Kα: Mn, Fe, Co Lα: Pm, Sm, Eu, Gd, Tb, Dy, Ho | BCLA0064 (check availability) |
| 7.5keV | Kα: Co, Ni, Cu Lα: Dy, Ho, Er, Tm, Yb, Lu, Hf, Ta, W | BCLA0075 (check availability) |
| 8.4keV | Kα: Cu, Zn, Ga Lα: Ta, W, Re, Os, Ir, Pt | BCLA0084 |
| 9.5keV | Kα: Zn, Ga, Ge, As Lα: Os, Ir, Pt, Au, Hg, Tl | BCLA0095 |
| 11.4keV | Kα: As, Se, Br, Kr Lα: Pb, Bi, Po, At, Rn, Fr, Ra | BCLA0114 |
| 13.6keV | Kα: Kr, Rb, Sr, Y Lα: Th, Pa, U, Np, Pu, Am | BCLA0136 |
| 16.0keV | Kα: Y, Zr, Nb, Mo Lα: Am | BCLA0160 |
| 18.4keV | Kα: Nb, Mo, Tc, Ru, Rh Lα: N/A | BCLA0184 |
| 22.0keV | Kα: Rh, Pd, Ag, Cd, In Lα: N/A | BCLA0220 |