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Outline

Outline. User programs and outcome XAFS Diffraction Microprobe. User Programs vs. Outcome. balancing among the multi-tech at HXMA among XAFS, diffraction, microprobe; pre-experiment setup / buffer shifts between user experiments; post-experiment support, CLS is developing mentor program.

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Outline

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  1. Outline • User programs and outcome • XAFS • Diffraction • Microprobe

  2. User Programs vs. Outcome • balancing among the multi-tech at HXMA among XAFS, diffraction, microprobe; • pre-experiment setup / buffer shifts between user experiments; • post-experiment support, CLS is developing mentor program.

  3. XAFS Setup X-ray

  4. Solid State Detectors Available 4 element Vortex detector Single element Vortex detector 1 element Ge detector 32 element Ge detector Lytle detector Single element Ge detector Lytle Detector

  5. Energy (keV) BL Capability: flux, detecting limits, sample environment - - - Single scan 10 minutes Oxford LHe cryostat: 4 – 300 K – XAFS; ARS Displex cryostat 20 – 300 K - Diff & XAFS Se K edge 32 Ge Detector Se in plant sample 5 microMolar (400 ppb)

  6. High Pressure powder diffraction User group provide all equipments and their controls. • DAC • Collimator • Stages • Beam stop with pin diode • Mar345 image plate • For group members only

  7. Powder diffraction and Psi-8 diffractometer Powder diffraction Mar345 image plate (open to GU) Sample goniometer for capillary Psi-8 diffractometer Motorized sample goniometer Cyberstar scintillation detector CCD detector Vortex X-ray fluorescent detector He displex cryostat (20 – 450 K)

  8. Microprobe Mono-only mode Energy range: 5 -25 keV, Beam size : 10 x 10 mm2 Flux: ~ 5e8 ph/sec @ 12 keV m-imaging and m-XANES 4-element Vortex detector Repeat knife-edge scans at several points along beam direction for 8 hours. No vertical beam position change (dashed line). Focal point changes by 12 mm (thick solid line).

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