BL6-2a

Overview
SPEAR3

High Resolution Hard X-ray Spectroscopy Wiggler End-Station

Beam line 6-2a is a wiggler end-station that can be configured for tender x-ray x-ray emission spectroscopy (instrumentation in commissioning use).

The ambient pressure operation of the end-station provides high flexibility in implementing various sample environments (in-situ, cryogenic, He-atmosphere, furnaces, liquids, high pressurized cells, etc.). A dedicated LHe cryostat allows for routine low temperature measurements. This end station operates with a focused x-ray beam of ~0.15x0.4 (VxH) mm2 and a flux of 2x1013 (4x1012) when a Si(111) or Si(311) monochromator is used, respectively.

Sample Environment —

Ambient pressure experiments He chamber(s), flexibility with various in-situ setups, liquid samples, high pressure. Dedicated LHe cryostat (4-200 K).
Minimum sample requirement (in terms of concentration): Depends strongly on the technique and the scientific question. Please contact responsible scientific staff for guidance.

Instrumentation —

Detectors Ionization chambers, Vortex detector, 4-element Vortex detector
Sample Positioning Newport Micro sample positioner, with several mounts for different sized objects. Range of travel up to 300x1000mm.

Technical Specifications

Energy —

Monochromator Energy Range Resolution ΔE/E Spot Size Flux
Si(111) 4000-18200 eV 1 x 10-4 0.15 x 0.4 mm2 2 x 1013
Si(311) 4000-18200 eV 3 x 10-5 0.15 x 0.4 mm2 3 x 1013

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.

Absorption —

127 μm Be

Publications

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