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Recent FETS Ion Source Measurements UK Neutrino Factory Plenary Meeting 8-9 June 2010 Rutherford Appleton Laboratory Dan Faircloth Faircloth.

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Presentation on theme: "Recent FETS Ion Source Measurements UK Neutrino Factory Plenary Meeting 8-9 June 2010 Rutherford Appleton Laboratory Dan Faircloth Faircloth."— Presentation transcript:

1 Recent FETS Ion Source Measurements UK Neutrino Factory Plenary Meeting 8-9 June 2010 Rutherford Appleton Laboratory Dan Faircloth Faircloth

2 Mounting Flange Negative Ion Beam Mica Penning Pole Pieces 10mm Aperture Plate Water Cooling Channels Source Body Air Cooling Channels Ceramic Spacer Copper Spacer Cathode Hollow Anode Discharge Region Extraction Electrode

3 Timing H - Beam Time H 2 Gas Pulse ~ 200 μs 50 A Discharge Pulse ~ 600 μs 17 kV Extract Pulse ~ 250 μs

4 Vary Discharge Pulse Length and Extract at Different Positions Discharge Pulse Length

5 Beam Currents Discharge Pulse Length

6 Variation in Rep rate Discharge Pulse Length

7 Too little Cs coverage (> 0.6 monolayers?) Too much Cs coverage (< 0.6 monolayers) Discharge Pulse Length Calculated Electrode Surface Temperatures

8 1 mm Cross section Through Cathode PLASMA REGION

9 Thank you for your attention. Questions?

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