Difference between revisions of "BielefeldGED:Equipment"

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[[Category:GED]]
 
[[Category:GED]]
 
This page contains description of equipment used by GED group in Bielefeld.
 
This page contains description of equipment used by GED group in Bielefeld.
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== News ==
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{| class="wikitable" style="text-align: left;"
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|- style="border-bottom: 2pt solid"
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! data-sort-type="date" | Date
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! Record
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|-
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| 28 Feb 2014
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| A new booster pump (''Edwards EH500'') has been installed.
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|-
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| 20 Dec 2013
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| A new diffusion pump (''Edwards Diffstak 250/2000P'') has been installed.
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|}
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== Instrument ==
 
== Instrument ==
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=== Pumps ===
 
=== Pumps ===
 
==== Backing Pumps ====
 
==== Backing Pumps ====
Backing (fore-vacuum) pumps: ''Edwards x05 Scrollpump Oilfree'' and ''Edwards E2M80'' oil pump.
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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.
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{| class="wikitable"
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{| style="border: 0px;"
| [[File:Bielefeld_VorvakuumP_2013_1.jpg|200px]]
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|- valign="bottom"
| [[File:Bielefeld_VorvakuumP_2013_2.jpg|200px]]
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| [[File:Bielefeld_VorvakuumP_2013_1.jpg|200px|thumb|Edwards E2M80 oil pump (left) and x05 Scrollpump Oilfree pump (right).]]
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| [[File:Bielefeld_VorvakuumP_2013_2.jpg|200px|thumb|The same pumps from side.]]
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| [[File:Bielefeld_VorvakuumP_2014_1.jpg|200px|thumb|More recent picture with the booster pump on top of the oil pump.]]
 
|}
 
|}
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==== Diffusion Pumps ====
 
==== Diffusion Pumps ====
 
New diffusion pump (''Edwards Diffstak 250/2000P''), installed in December, 2013:
 
New diffusion pump (''Edwards Diffstak 250/2000P''), installed in December, 2013:

Revision as of 12:45, 6 March 2014

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

News

Date Record
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.


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, Edwards E2M80 oil pump and Edwards EH500 booster pump. Our last oilfree pump worked 48822.8 hours. On the pictures is the new one.


Edwards E2M80 oil pump (left) and x05 Scrollpump Oilfree pump (right).
The same pumps from side.
More recent picture with the booster pump on top of the oil pump.


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