This page contains description of equipment used by GED group in Bielefeld.
|28 Feb 2014||A new booster pump (Edwards EH500) has been installed.|
|20 Dec 2013||A new diffusion pump (Edwards Diffstak 250/2000P) has been installed.|
The reconstructed Balzers Eldigraph KD-G2 (one of only two still existing ones worldwide) is presently in use in the laboratory.
The most recent paper [BergerZFN2009]Author: Berger, Raphael J. F.; Hoffmann, Manfred; Hayes, Stuart A.; Mitzel, Norbert W.
Journal: Z. Naturforsch B
Title: An Improved Gas Electron Diffractometer -- The Instrument, Data Collection, Reduction and Structure Refinement Procedures
about this improved gas electron diffractometer contains lots of details.
Backing (fore-vacuum) pumps: Edwards x05 Scrollpump Oilfree, Edwards E2M80 oil pump and Edwards EH500 booster pump. Our last oilfree pump worked 48822.8 hours. On the pictures is the new one.
New diffusion pump (Edwards Diffstak 250/2000P), installed in December, 2013:
Old diffusion pump:
Turbo pump (Edwards EXT70H) attached to the electron gun:
A sin2-type sector (common formula is A*sin2(r/B)) is used.
This nozzle has been constructed for evaporation of compounds in a temperature range from 25 to 380 °C. However, it has also been successfully used for low temperatures below -15 °C.
A Hiden mass-spectrometer (PIC 1000 series, up to 2500 amu) with EPIC ion counting detector is attached to the electron diffraction unit.
|[BergerZFN2009]||Berger, Raphael J. F.; Hoffmann, Manfred; Hayes, Stuart A.; Mitzel, Norbert W. (2009): An Improved Gas Electron Diffractometer -- The Instrument, Data Collection, Reduction and Structure Refinement Procedures. Z. Naturforsch B, 64, 1259-1268|
|[ReuterZNB2016]||Reuter, Christian G.; Vishnevskiy, Yury V.; Blomeyer, Sebastian; Mitzel, Norbert W. (2016): Gas electron diffraction of increased performance through optimization of nozzle, system design and digital control. Zeitschrift für Naturforschung B, 71, 1-13|