Berlin Joint Lab for Electrochemical Interfaces @U49-2 PGM
The BElChem-PGM beamline covers the soft X-ray energy range from approximately 90 eV to 2000 eV with a plane grating monochromator. Its source is a planar undulator with a period length of 49.4 mm (U49-2) and minimum gap of 16 mm. The optical elements and layout of the beamline have been optimized to deliver a high photon flux over a broad energy range, in particular at energies above 800 eV, with moderate spectral resolution. This helps to facilitate in-situ and operando experiments that are conducted at elevated gas pressures or in liquids.Selected Applications:
- X-ray photoelectron spectroscopy (XPS) under high vacuum (p=10^(-8) mbar) and near ambient pressure conditions (maximum 20 mbar, typically 1 mbar)
- X-ray aborption spectroscopy (XAS) at pressure up to 20 mbar with NAP-HE-XPS endstation
- log-in methodology applying the beamline chopper to modulate the incoming X-ray induced signal
|Temperature range||room temperature up to 1000 K|
|Pressure range||Maximum pressure: 20 mbar|
Minimum pressure: 10-8 mbar
Typical pressure: 1 mbar
For more details contact the instrument scientist.
|More details||BElChem-PGM station|
|Source||U49-2 (planar undulator)|
|Energy range||90 - 2000 eV|
|Energy resolution||70meV at 400eV photon energy|
|Flux||4.00 1013 mbar photons/s@300mA|
|Divergence horizontal||10 mrad|
|Divergence vertical||10 mrad|
|Focus size (hor. x vert.)||100 µm X 20 µm (expected)|
|Distance Focus/last valve||964 mm|
|Height Focus/floor level||1400 mm|
|Beam availability||24h/d, operation in TRIBS mode possible|
|Phone||+49 30 8062 14842|
|beamline specials||mechancial choppper |
differentially pumped interface
For more details and current status please contact instrument scientist(s) listed on the right.
The Berlin Joint Lab for Electrochemical Interfaces (BElChem) is located at the BESSY II synchrotron in Berlin, Germany, and co-run by the Fritz-Haber-Institut der MPG (FHI), the Max Planck Institute for Chemical Energy Conversion (MPI-CEC), and the Helmholtz-Zentrum Berlin. BElChem focuses on providing a molecular-level description of (photo)electrochemical interfaces that are of high relevance for solar fuel production and renewable energy storage.
The BElChem facility consists of two beamlines with two endstations in two separate hutches and an additional sample preparation/chemical lab. BElChem-PGM (plane grating monochromator) covers the soft X-ray energy range, whereas BElChem-DCM (a dipole magnet sourced beamline) with a double crystal monochromator (DCM) covers the tender X-ray energy range.
Please find more details on BElChem in