Overview
Beam line 6-2b is a wiggler end-station dedicated to micro-focus High Resolution Hard X-ray Spectroscopy using polycapillaries and micro computed tomography. High-Energy Resolution Fluorescence Detected X-ray Absorption Spectroscopy (HERFD-XAS) is performed in a dedicated He environment, with 3 rows of 5 analyzer crystals.
Source: 56-pole, 0.9-Tesla wiggler, End Station, 1.2 mrad acceptance.
Status —
Beamline Parameters —
| Monochromator | Energy Range | Resolution ΔE/E | Spot Size | Flux |
|---|---|---|---|---|
| Si(111) | 4000-18200 eV | 1 x 10-4 | 50 micron | 8 x 1012 |
| Si(311) | 4000-18200 eV | 3 x 10-5 | 50 micron | 1 x 1012 |
Optics —
| M0 Mirror | M1 Mirror | Monochromator |
|---|---|---|
| Bent flat single-crystal Si, Rh coated 10-18.2 keV cutoff, vertically collimating | Bent cylindrical single-crystal Si, Rh coated, standard focus | LN2 cooled, Si(111), ϕ = 0o , Si(311), ϕ = 0o. double-crystal. |
Source —
Wiggler
Instrumentation —
| 15-crystal analyzer spectrometer for HERFD |
|---|
| Detectors: single element Vortex SDD, 4-element Vortex SDD. |
| Other: Integrated shutter system and variable filters to alleviate radiation damage. |
Sample Environment —
| Ambient pressure experiments | Ambient pressure experiments, He chamber |
|---|
Absorption —
| 127 μm Be |
|---|
Publications
Publications
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