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Title. Cluster-Jet works at GSI. Herbert Orth, GSI Darmstadt, Germany. Works at Cluster-target apparatus systematic cluster yield measurements gas load towards the scattering chamber Experiments with the Genova cluster catcher Implementation of a full slow controle system based on LabView

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  1. Title Cluster-Jet works at GSI Herbert Orth, GSI Darmstadt, Germany

  2. Works at Cluster-target apparatus systematic cluster yield measurements gas load towards the scattering chamber Experiments with the Genova cluster catcher Implementation of a full slow controle system based on LabView Development of new improved nozzles Development of new Cluster-jet source Mock–up apparatus for target-beam crossing Internal workshop FNAL/INFN/GSI/SMI INFN/GSI/SMI Cluster-jet

  3. TP 1000 New INFN/SMI/GSI Cluster-Jet Jet Head not installed Catcher Chamber Scattering Chamber Differential Chamber Nozzle Chamber Skimmer Chamber TP 3500

  4. Internal workshop FNAL/INFN/GSI/SMIGenova, GSI, October 26-29 • Status and problem with target set-up • Beam/Target line • New Jet-source • Clogging of Hydrogen gas line • Nozzle development • Catcher and mounting at GSI target station

  5. Cluster-Jet assembly

  6. View into Nozzle Head with position and angle adjustmens

  7. Liquid Hydrogen Jet (P = 20 bar, T = 30 K) Nozzle Jet Skimmer 1 mm

  8. Original CERN Nozzle

  9. Fabrication Procedure of CERN Nozzles

  10. Modified CERN Nozzle

  11. Assembly of modified nozzle on cold head (exploded) back face Nozzle holder Cold Finger Cluster-jet H2 Orifice Nozzle Germanium temperature sensor Micro filter Indium Washers

  12. New Nozzle fabrication methods Nozzle throat: 100 micron and with variable orifice Different shapes and angles of diverging part of expanding cone Dies produced by electro erosion with very smooth surfaces, without further surface rectification - then electrolytic deposition of Cu - Hydroforming of Cu- around die Direct nozzle production by electro-erosion (down to 20 micron wires possible) - Problem of first hole

  13. Cluster-Jet Source with Coolpower 10 MD cryocooler

  14. Mock-up of Beam – Target Crossing for vacuum studies Source Source Beam Dump

  15. Linearized Target-Beam Crossing Dump Source Beam

  16. Time lines Date Preparation of vacuum pieces with flanges (in progress) Purchase of equipment (Gauges, gate valve, turbo pumps) Jan 2011 Construction with ITEM tools Jan 2011 Transport of bake-out hardware from Vienna Jan 2011 Set-up completed Feb 2011 Start pumping Feb 2011 Baking-out up to 200 °C Mar 2011 Measurements Mar-June 2011

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