Characterization of 2 45 GHz ECR Ion Source

Characterization of 2. 45 GHz ECR Ion Source Bench for Accelerator-Based 14 Me. V Neutron Generator SUDHIRSINH VALA INSTITUTE FOR PLASMA RESERCH GANDHINAGAR-GUJARAT, INDIA ECRIS 2020_Sudhir_29 Sept 2020_15: 15 1

Upcoming 14 -Me. V neutron Facility at IPR Parameter of 14 -Me. V Neutron Generator Type of Machine DC Electrostatic Accelerator Max Acceleration Voltage 300 k. V Type of Beams D+ Ion Current 20 m. A Vacuum Pressure 1 x 10 -7 mbar Target Tritium, 140 Ci Estimated Neutron Yield ~ 1 -5 x 1012 n/s 3 D view of the 14 -Me. V neutron Generator ECRIS 2020_Sudhir_29 Sept 2020_15: 15 2

Neutron & Ion Irradiation Laboratory Neutronics Laboratory Building South - East side view Neutronics Laboratory Building East - North side view ECRIS 2020_Sudhir_29 Sept 2020_15: 15 Inside view of Neutronic Laboratory 3

40 ke. V, Low Energy Beam line Results of beam optics simulations Command & Control System ECRIS 2020_Sudhir_29 Sept 2020_15: 15 340 ke. V, Medium Energy Beam line Magnet Power supplies for 4 Beam line

2. 45 GHz High Current Source Parameter GANIL FRANCE 1200 Watt, 2. 45 GHz, SILHI (SPIRAL -2) FRANCE 1200 Watt, 2. 45 GHz CEA/Saclay (IFMIF) FRANCE 2000 Watt, 2. 45 GHz Microwave Power Magnet System Two Coaxial Nd. Fe. B permanent magnet Ring Three Coaxial Nd. Fe. B permanent magnet Ring Plasma Chamber 90 mm diameter, Water cooled LBNL USA 800 Watt, 2. 45 GHz 700 Watt, 2. 45 GHz Two solenoid configuration Three Coaxial Nd. Fe. B permanent magnet Ring Two solenoid configuration 90 mm diameter, Water cooled 40/50 mm diameter, OFHC Copper, with Al liner 3 electrode extraction system with 50 k. V max, 5 mm 0. 2 92 mmdiameter, Water cooled 100(D) 44(D) 4 electrode 5 electrode extraction system with 40 system with 55 k. V max, 50 k. V max, Extraction aperture 7 mm 3 mm 9 mm Beam Emittance 0. 2 < 0. 1 0. 25 ( mm mrad) Max Beam Current 40 (P) 10 (D) 140(D) ECRIS 2020_Sudhir_29 Sept 2020_15: 15 Beam Optics PKUNIFTY CHINA 3 electrode extraction system with 60 k. V max, 3 mm 0. 04 5

Schematic diagram of 2. 45 GHz ECR ion Source bench ECRIS 2020_Sudhir_29 Sept 2020_15: 15 6

2. 45 GHz ECR ion source bench at IPR Magnetic lens, 0. 350 T, 255 mm, 40 mm half aperture Allison scanner ECRIS 2020_Sudhir_29 Sept 2020_15: 15 2. 45 GHz ECR Ion Source 7

Results of ion beam Extraction Measurement deuterium beam current as function extraction voltage & microwave power Measurement deuterium beam current as function extraction voltage & pressure (mass flow rate) with fix microwave power 400 W ECRIS 2020_Sudhir_29 Sept 2020_15: 15 8

Results of Emittance measurements ECRIS 2020_Sudhir_29 Sept 2020_15: 15 9

Summary üFor the better focusing of the ion beam into the LEBT, the Einzel lens has been replaced with the magnetic lens (Solenoid) üTo measure the beam emittance dual Allison emittance scanner has been integrated into the test bench. üThe beam characterization experiments have been successfully performed. üThe beam emittance, as well as beam profile, have been measured as a function of solenoid current. üThe normalized emittance is < 0. 2 pi. mm. mrad üThe beam diameter is < 20 mm ECRIS 2020_Sudhir_29 Sept 2020_15: 15 10

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