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   Project Coordinator
   Prof. Theo Zouros
   Atomic & Molecular Physics
   Dept. of Physics
   Univ. of Crete, PO Box 2208,
  . GR-71003 Heraklion
   e-mail: tzouros@physics.uoc.gr

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Home > Work Packages > WP4 - 00 Collision chamber preparation
Work Packages

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Work Package 4: 0o Collision chamber preparation

Figure 1: Photo of spectrometer chamber (left) on XYZ translation table and gas cell 6-way cross (right) with turbo pumps installed.


Figure 2: 3-D schematic of new beam line showing analyzer chamber and 6-way cross with gas target as well as 4-jaw slits, isolation valve and beam profile monitor preceded by magnetic steerers and focusing quadrupole (SolidWorks 3D).


Description of work package

Work Package



Month 4


Month 15



WP4: 00 Collision chamber preparation


Research Teams:

RT1, RT2, RT3

4.1 Preparation of high vacuum collision chamber: Careful study of best usage of two collision chambers brought from Kansas. The 2nd chamber is bigger than the original with more space for gas cell and spectrometer and has better mu-metal shielding advantages that need to be considered. High voltage cabling considerations. Electrical signal and noise pick-up considerations. Pumping speed analysis, selection of turbo pumps and ultimate vacuum considerations. Typically, a central turbo pump (350-500 lt/s) is needed for the chamber with a second smaller one (100 lt/s) for the target gas cell. All pumps will have to be bought.

4.2 Faraday cup construction: The Faraday cup has to be designed, built and carefully installed on the chamber. It is used to stop the beam and measure its current for monitoring and spectrum normalization.

4.3 Connection of chamber to beam line and final tests with ion beam from TANDEM: The whole chamber and Faraday cup will be tested for vacuum to about 1 x 10-7 Torr. Then it will be connected to the beam line and aligned to the beam axis on a special support stand that will be built in the machine shop. Check of transmission and current integration with ion beam from the accelerator.


1 Report and possibly part of BS, MS or PhD thesis

WP4: Table of Activities in progress

CompletedActivityTarget Date
Setup old KSU collision chamber to house HDA
Dec 2012
Bought 8" 6-way cross to house gas cell
May 2013
Bought two Leybold 600 lt/s turbo pumps for chamber and cross
Jun 2013
Bought two oil free backing pumps to go with the turbos
Jun 2013
Tested high vacuum on spectrometer and gas cell chamber
Nov 2013
Special beam line support for 6-way cross build in machine shop and installed
Dec 2013
Chamber moved into position and aligned
Dec 2013
Installed Faraday Cup at end of chamber
Dec 2013
Improve feet support of chamber - installed new feet from NGI
Jan 2014
Connect chamber to beam line (see Fig. 2 WP1) - changed order of beam line elements to allow installation of additional FC before isolation valve between 6-way cross and beam line
Jan 2014
Place turbo pump controllers and vacuum indicators in support structure
Jan 2014
First ion beam transmission test completed Feb 21, 2014 with isolation valve closed, L45 dipoles on but L45 steerers off. Measured 270nA in FC1 (before isolation valve) with 10 x 10 mm slits 1 (after switcher) and 600nA in FC before switcher. Beam: 2 MeV protons
Feb 2014
Additional modifications of electrical connections on ports to accomodate new piezoelectric motor for moving PSD
May 2015
Final Report on work package completed
Dec 2015

WP4: Deliverables

WP4: Technical Notes

WP4: People finally involved

  • Prof. Theo Zouros - MRG RT1 (UoC)
  • Giannis Madesis (PhD student) - GEC RT1 (UoC)
  • Dr. Tasos Lagoyannis - MRG RT2 (INP Demokritos)
  • Dr. Michalis Axiotis - GEC RT2 (INP Demokritos)
  • Dr. Tasos Dimitriou - GEC RT1 (UoC)
  • Prof. Manolis Benis - MRG RT3 (UoI)
  • Aggelos Laoutaris (MS student) - GEC RT1 (UoC)

WP4: References

Last Update: 08/12/15 09:46:28

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