DEGAS - Laboratory for Gas Adsorption Measurements
In 2006 the Hahn-Meitner-Institute Berlin started establishing a dedicated sample environment, answering the strongly increased requests on neutron scattering experiments combined with in-situ gas adsorption measurements. Due to the complexity of sample preparation and characterization in this type of investigations, it appeared reasonable to offer the suite of the modular experimental set-ups also for preliminary and completing measurements "off-beam" in the laboratory.
Up till now more than 25 different gas-adsorption modules cover a wide pressure and temperature range from 2 K to 1500 K and pressures up to 10000 bars. Thereby volumetric as well as gravimetric controlled sample loading can be combined with stepwise and continuous gas dosing methods. After the unification of the HMI with the Berlin synchrotron BESSY-II, parts of the gas adsorption sample environments have been modified or redesigned for in-situ investigations with x-rays.
The DEGAS laboratory is open for internal and external scientist, if their projected investigations contribute to the preparation or completion of neutron or x-ray scattering research at the Helmholtz Centre Berlin. For web based reservation requests of the DEGAS laboratory and it's equipment use the DEGAS-LabCalendar (HZB web-password required) or contact the lab responsible Dr. D. Wallacher.
BER-II instrument responsibles can access of the DEGAS equipment for scheduled combined in-situ neutron scattering experiments under controlled gas atmospheres (CGA) via the sample environment booking calendar.