1. WU2 - Proton Source Istituto Nazionale di Fisica Nucleare Laboratori Nazionali del Sud

2. Proton source & LEBT: delays almost absorbed 2

3. Proton Energy 75 keV Large currents (60-80 mA) Pulsed operation (2.86 ms - 14 Hz) Low emittance (0.2 to 0,3 π mm mrad) Short pulse rise time (100 ns) Long lifetime (>> 1 month) Robust extraction system High reliability (> 99%) LEBT optimization Requirements Issues: experimental investigations planned to validate calculations

4. Proton source 4 Based on knowledge acquired with TRIPS, SILHI and VIS high intensity proton sources TRIPS Based on knowledge acquired with TRIPS, SILHI and VIS high intensity proton sources TRIPS Movable magnetic system composed by two solenoidsMovable magnetic system composed by two solenoids Five electrodes extraction systemFive electrodes extraction system

5. TRIPS emittance and reliability 5 TRIPS 6 mm extr. hole Parameter Extraction voltage 80 kV Puller voltage 42 kV Repeller voltage -2.6 kV Dischargepower 435 W Beam current 35 mA Mass flow  0.5 sccm Availability over 142h 25’= 99.8 % L. Celona et al., Rev. Sci. Instrum, 75 (5), 1423

6. SILHI Proton source tests 6 I=90mA Vextr=85 kV (  =9mm) R. Miracoli et al., accepted to Rev. Sci. Instrum.

7. Flexible Magnetic field 7 1."Simple Mirror" 2."Off-Resonance " 3."Magnetic Beach" 1 2 3 current [A]InjMedExt Simple Mirror400-300400 Off-Resounance155120170 Megnetic Beach26000

8. Flexible Magnetic field Magnetic Beach Simple Mirror Off-Resonance

9. Microwave coupling study 9 @ 2.45 GHz from 413.97 Ω to 144.41 Ω

10. Enhancement of E-M field inside plasma chamber 10 + 100% WITH TRANSFORMER + + 10 % FROM TRIPS TO PS-ESS WITHOUT TRANSFORMER @ 2.45 GHz S21 = -0.0152 db

11. Beam extraction 11 Five-electrode topology (TRIPS, SILHI) on-line optimisation of the extracted beam wide range of operations alignment issues of the overall geometry biasing system needed for the intermediate electrode Four-electrode topology (VIS, LANL) optimized for a narrow range of operating current no alignment problems no biasing system

12. PS-ESS beam extraction I tot = 98.55 mA (H + =90%; H 2+ =10%)

13. PS-ESS beam extraction Alpha =-10.2955 Beta = 1.9033 Proton beam emittance rms norm. @ 0.14 m = 0.126 pi mm mrad AXCEL Beam output @ 0.14 m has been used as input for TRACEWIN simulations.

14. 14 Parallel and perpendicular launching of EM waves PLASMA TRAP with versatile B-field Investigation of EBW-heating under different magnetic field configurations The new plasma trap has been designed as test-bench for plasma studies and for EBW-heating at 5-10 GHz: X-ray imaging LP measurements RF diagnostics (spectral analysis) B-field magnets and structure

15. Proton source & LEBT planning for ADU phase (till Dec.12) 15

16. Proton source & LEBT planning for P2B phase (till Dec.13) 16