Overview
Beamline 6-2a is a Wiggler radiation-based versatile experimental station designed for high-energy-resolution spectroscopy in the tender X-ray range (1.6–5.0 keV). The station features a Johansson-type x-ray spectrometer operating on a Rowland geometry with cylindrical Johansson analyzers, enabling sub-natural linewidth energy resolution (~0.32 eV at 2400 eV). This apparatus provides to the SSRL Users the unique capability of performing advanced spectroscopy (XES/HERFD-XAS/RIXS) studies for elements such as S, Cl, 4d metals, and 5f actinides. The spectrometer integrates a separate ambient pressure He sample chamber, facilitating flexible sample environment conditions, including liquid jets, electrochemical cells, thermal reactors, etc. Typically, this instrumentation enables a multipurpose scientific program across catalysis, energy science, biochemistry, environmental science as well as actinides research.
Status —
Beamline Parameters —
| Energy Range | Resolution ΔE/E | Spot Size | Flux | |
|---|---|---|---|---|
| Focused | 2400-6000 eV | 1 x 10-4(Si111) | 250 x 250 um2 | ~4 x 1012 |
Optics —
| M0 Mirror | M1 Mirror | Monochromator |
|---|---|---|
| Bent flat single-crystal Si, Rh coated 10-18.2 keV cutoff | Bent cylindrical single-crystal Si, Rh coated | LN2 cooled, Si(111), ϕ = 0o , Si(311), ϕ = 0o. double-crystal. |
Source —
Instrumentation —
| Detectors | Andor DX436-BN CCD, GreatEyes LOTTE-i2k2k BI DD, TFY photodiode. |
|---|---|
| Spectrometers | Johansson-type Tender X-ray Emission spectrometer (https://doi.org/10.1063/1.5121853) |
| Ancillary | Integrated fast shutter system, Biologic potentiostat, Asahi Xe light source. |
Sample Environment —
| Standard room temp | Flexible ambient pressure experiments in under controlled He sample chamber; various Pellets holders; liquid cells, and recirculating liquid jet option. |
|---|---|
| Non-standard setups | Flexibility with various in-situ setups including photo/electro-chemical cells and thermal reactors for operando catalysis. Other customized and/or Users developed sample environments are regularly being integrated. Please, communicate with beam line staff well in advance to ensure your set-up will work. |
Absorption —
| 127 μm Be |
|---|
