1. Kévin Pepitone 1CLIC project meeting, CERN, December 1st, 2015 Kevin PEPITONE, BE-RF Drive Beam Injector Gun

2. Kévin Pepitone 2CLIC project meeting, CERN, December 1st, 2015 Kevin PEPITONE, BE-RF Low Energy Electron source from Thermionic Cathode at High Intensity Low Energy Electron source from Thermionic Cathode at High Intensity LEETCHI

3. Status of LEETCHI for CLIC Kévin Pepitone 3CLIC project meeting, CERN, December 1st, 2015 Kevin PEPITONE, BE-RF

4. 4 Outline CLIC project meeting, CERN, December 1st, 2015 Kevin PEPITONE, BE-RF Introduction and electron beam parameters Integration: experimental area, HV deck and control room Components: HV components and PLC system Diagnostics: electrical and optical diagnostics Simulations Perspectives Conclusions

5. 5 Introduction CLIC project meeting, CERN, December 1st, 2015 Kevin PEPITONE, BE-RF Conceptual design report (EDMS 1234244) LEETCHI

6. ParametersBaseline Beam energy140 keV Beam current5 to 7 A Pulse length140 µs Emittance (RMS)< 20 mm mrad Repetition rate50 Hz Beam power4,9 to 6,9 kW Shot to shot charge variation0.1 % Flat top charge variation0.1 % after correction 6 Electron beam parameters CLIC project meeting, CERN, December 1st, 2015 Kevin PEPITONE, BE-RF ParametersBaseline Beam energy140 keV Beam current5 to 7 A Pulse length140 µs Emittance (RMS)< 20 mm mrad Repetition rate50 Hz Beam power4,9 to 6,9 kW Shot to shot charge variation0.1 % Flat top charge variation0.1 % after correction From a thermionic cathode

7. 7 Integration CLIC project meeting, CERN, December 1st, 2015 Kevin PEPITONE, BE-RF 162/R-002 6330 2750 CLINFTLA0100 High voltage

8. Relay Ross 150 kV Insulating transformer to produce 220 Vac 8 Integration – Experimental area CLIC project meeting, CERN, December 1st, 2015 Kevin PEPITONE, BE-RF HV deck connected to the -140 kV High voltage DC power supply -200 kV/10 mA Capacitor 10 nF / 150 kV

9. 9 Integration – HV deck CLIC project meeting, CERN, December 1st, 2015 Kevin PEPITONE, BE-RF Pulser power supply -1000 V at repetition rates up to 1 kHz Bias power supply 300 V / 450 mA Heater power supply 15 V / 10 A PLC

10. 10 Cathode and connector CLIC project meeting, CERN, December 1st, 2015 Kevin PEPITONE, BE-RF Ground + - 140 kV Anode Cathode Electron beam Grid HV pulser -1000 V Heater PS 15 V, 10 A Bias PS +300 V, 0.45 A 220 V Insulating transformer 220 V + + + Control interface PLC Optical fibre PLC in the control room HV deck Cathode CPI YU156

11. 11 Cathode and connector CLIC project meeting, CERN, December 1st, 2015 Kevin PEPITONE, BE-RF + 220 V Insulating transformer -140 kV Heater + Pulser + Pulser - Heater - Bias - Bias + Vadim Soldatov

12. 12 Integration – Control room CLIC project meeting, CERN, December 1st, 2015 Kevin PEPITONE, BE-RF Danish Ali Nawaz PLC Media converter Vacuum gauges PLC touch screen HVPS remote Ion pumps PS Solenoids PS Contactors Delay generator

13. 13 Dump and Diagnostics CLIC project meeting, CERN, December 1st, 2015 Kevin PEPITONE, BE-RF Energy deposition calculated with Geant4 for 140 keV, 5A, 140 µs electron beam 3D thermal analysis (ANSYS) Energy deposition Integrated energy deposition as a function of length Cedric Delory Northstar VD-150 230 kV, 20 MHz Bergoz ACCT-S-C8 OTR with silicon carbide target 50 mm diameter

14. 14 Simulations CLIC project meeting, CERN, December 1st, 2015 Kevin PEPITONE, BE-RF Current dependence of the emittance for the 8 mm cathode (EGUN) MAGIC simulation example of the electron gun Focusing coilBucking coil Cathode r = 8 mm r-z at 10 ns Electrical field simulations in the cathode region to check possible breakdown locations (Flux2D). Maximum surface field 14 kV/cm Jacques Gardelle, CEA Bruno Cassany, CEA Romain Pecquois, CEA Steffen Doebert

15. 15 Perspectives CLIC project meeting, CERN, December 1st, 2015 Kevin PEPITONE, BE-RF ParametersBaseline Beam energy140 keV Beam current5 to 7 A Pulse length140 µs Emittance (RMS)< 20 mm mrad Repetition rate50 Hz Beam power4,9 to 6,9 kW Shot to shot charge variation0.1 % Flat top charge variation0.1 % after correction 40 kV prototype of the modulator During HV tests Modular 7.5 kV board Voltage waveform on 4.5 kΩ resistive load Schematic of the modulator during Charging and Discharging Bruno Cassany, CEA Baptiste Cadilhon, CEA Romain Pecquois, CEA

16. 16 Conclusions CLIC project meeting, CERN, December 1st, 2015 Kevin PEPITONE, BE-RF Integration and installation of the gun in the area are completed Vacuum is good New components are expected:  Optical diagnostic  Dump  Connector The first tests with short pulses beams will be performed in 2016 The tests with long pulses at 50 Hz should be performed in 2016

17. Thank you for your attention 17CLIC project meeting, CERN, December 1st, 2015 Kevin PEPITONE, BE-RF