BElChem-DCM

Berlin Joint Lab for Electrochemical Interfaces @Dipole

The BElChem-DCM beamline covers the tender X-ray energy range from approximately 2.4 to 10 keV with a double crystal monochromator containing a Si(111) crystal pair. Its source is the dipole bending magnet D4.2. 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 up to 8 keV, with moderate spectral resolution. This helps to facilitate in-situ and operando experiments that are conducted at elevated gas pressures or in liquids.

Optical layout of the future BElChem-DCM beamline: it is composed of two cylindrical mirrors (M1, M2) and a double crystal monochromator containing a Si(111) crystal pair. The M1 mirror will collimate the white beam onto the first crystal of the DCM. Horizontal focusing of the beam will be achieved by the second (bendable) crystal of the DCM. The M2 mirror will be used for vertical focusing of the beam and for directing it to the experimental position.

Optical layout of the future BElChem-DCM beamline: it is composed of two cylindrical mirrors (M1, M2) and a double crystal monochromator containing a Si(111) crystal pair. The M1 mirror will collimate the white beam onto the first crystal of the DCM. Horizontal focusing of the beam will be achieved by the second (bendable) crystal of the DCM. The M2 mirror will be used for vertical focusing of the beam and for directing it to the experimental position.


Station data
Temperature range room temperature
Pressure range up to 30 mbar gas pressure
Weitere Details SpAnTeX
Beamline data
Segment L04
Location (Pillar) 6.1
Source Dipole 4.2
Monochromator DCM
Energy range 2.4 - 10 keV
Energy resolution between 0.2 @ 2.4 keV and 1.3 @ 10 keV (according to simulations)
Flux > 1011 photons/(s 0.3A 0.1%BW) for photon energies up to 8keV (according to simulations)
Polarisation
Divergence horizontal mrad
Divergence vertical mrad
Focus size (hor. x vert.) 0.2 x 0.4 mm2 (according to simulations)
User endstation
Distance Focus/last valve mm
Height Focus/floor level mm
Beam availability
Phone

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, the Max-Planck-Institut of Chemical Energy Conversion 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 

David E. Starr, Michael Hävecker, Axel Knop-Gericke, Marco Favaro, Simone Vadilonga, Marcel Mertin, Gerd Reichardt, Jan-Simon Schmidt, Frank Siewert, Robert Schulz, Jens Viefhaus, Christian Jung & Roel van de Krol (2022) The Berlin Joint Lab for Electrochemical Interfaces, BElChem: A Facility for In-situ and Operando NAP-XPS and NAP-HAXPES Studies of Electrochemical Interfaces at BESSY II, Synchrotron Radiation News, 35:3, 54-60, DOI: 10.1080/08940886.2022.2082209