Difference between revisions of "BielefeldGED:Equipment"

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| [[File:Bielefeld_GED_Instrument_Jun2007.JPG|200px|thumb|The apparatus with new gun, power supply and recording system (image plates), Jun 2007]]
 
| [[File:Bielefeld_GED_Instrument_Jun2007.JPG|200px|thumb|The apparatus with new gun, power supply and recording system (image plates), Jun 2007]]
 
| [[File:Bielefeld_GED_Instrument_Nov2007.jpg|200px|thumb|November 2007, the apparatus is already in Uni-Bielefeld]]
 
| [[File:Bielefeld_GED_Instrument_Nov2007.jpg|200px|thumb|November 2007, the apparatus is already in Uni-Bielefeld]]
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| [[File:Bielefeld_GED_Instrument_Sep2009.jpg|200px|thumb|September 2009, more control devices]]
 
| [[File:Bielefeld_GED_Instrument_Sep2009.jpg|200px|thumb|September 2009, more control devices]]
 
| [[File:Bielefeld_GED_Instrument_May2011.jpg|200px|thumb|May 2011, heavily improved control panel]]
 
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=== Pumps ===
 
=== Pumps ===
 
==== Backing Pumps ====
 
==== Backing Pumps ====
Backing (fore-vacuum) pumps for the diffusion and turbo pumps:
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Backing (fore-vacuum) pumps: ''Edwards x05 Scrollpump Oilfree'' and ''Edwards E2M80'' oil pump.
  
 
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==== Diffusion Pumps ====
 
==== Diffusion Pumps ====
New diffusion pump, installed in December, 2013:
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New diffusion pump (''Edwards Diffstak 250/2000P''), installed in December, 2013:
  
 
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==== Turbo Pumps ====
 
==== Turbo Pumps ====
Turbo pump attached to the electron gun:
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Turbo pump (''Edwards EXT70H'') attached to the electron gun:
  
 
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=== Sector ===
 
=== Sector ===
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A sin<sup>2</sup>-type sector (common formula is A*sin<sup>2</sup>(r/B)) is used.
 
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Revision as of 15:55, 17 February 2014

This page contains description of equipment used by GED group in Bielefeld.

Instrument

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
Number: 11
Pages: 1259-1268
Title: An Improved Gas Electron Diffractometer -- The Instrument, Data Collection, Reduction and Structure Refinement Procedures
Volume: 64
Year: 2009
Link to Google Scholar
about this improved gas electron diffractometer contains lots of details.

Current state

Bielefeld GED Instrument 2013 1.jpg Bielefeld GED Instrument 2013 2.jpg Bielefeld GED Instrument 2013 3.jpg
Bielefeld GED Instrument 2013 4.jpg Bielefeld GED Instrument 2013 5.jpg Bielefeld GED Instrument 2013 6.jpg

History

GED instrument in April 2006 (Uni-Münster)
The apparatus with new gun, power supply and recording system (image plates), Jun 2007
November 2007, the apparatus is already in Uni-Bielefeld
September 2009, more control devices
May 2011, heavily improved control panel
The instrument in 2012


Pumps

Backing Pumps

Backing (fore-vacuum) pumps: Edwards x05 Scrollpump Oilfree and Edwards E2M80 oil pump.

Bielefeld VorvakuumP 2013 1.jpg Bielefeld VorvakuumP 2013 2.jpg

Diffusion Pumps

New diffusion pump (Edwards Diffstak 250/2000P), installed in December, 2013:

Bielefeld NDiffusionP 2013 1.jpg Bielefeld NDiffusionP 2013 2.jpg Bielefeld NDiffusionP 2013 3.jpg


Old diffusion pump:

Bielefeld ODiffusionP 2013 1.jpg Bielefeld ODiffusionP 2013 2.jpg

Turbo Pumps

Turbo pump (Edwards EXT70H) attached to the electron gun:

Bielefeld TurboP 2013 1.jpg

Sector

A sin2-type sector (common formula is A*sin2(r/B)) is used.

Bielefeld Sector 2006.jpg Bielefeld Sector 2013 1.jpg Bielefeld Sector 2013 3.jpg

Inlet Systems

Room-temperature Nozzle

Inlet device for room temperatures (used by Heinz Oberhammer).
Nozzle tip.

References

[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, 1259-1268Link to Google Scholar
[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, 1-13Link to Google Scholar