1. NATIONAL INSTITUTE OF NUCLEAR PHYSICS Legnaro National Laboratories Study and test of the SPES FEBIAD ion source INFN – CISAS collaboration Mattia Manzolaro & the SPES target group 30/06/2011

2. OVERVIEW 1. June/July work schedule 2. Stabilization of the Ar ion beam current 3. Effect of the cathode current 4. Effect of the anode voltage 5. Ar ionization efficiency estimation (WIP) 6. Emittance measurements (WIP) 7. ICIS2011: poster session and proceeding 8. The work schedule for the next month (July) Mattia Manzolaro & the SPES target group 30/06/2011

3. 1. June/July work schedule The schedule for the next measurements (June/July): 1- Effect of V_anode on the beam current value keeping constant the cathode current at 330A and at 350A (Ar beam). 2- Effect of the cathode current on the beam current value keeping constant V_anode at different values (Ar beam). 3- Ar ionization efficiency estimation. 4- Tests 1, 2 and 3 to repeat using Xe instead of Ar. 5- Emittance measurements. 6- Stability tests (10 hours of stable functioning or more). 7- Sn ionization efficiency measurements. Mattia Manzolaro & the SPES target group 30/06/2011

4. 2. Stabilization of the Ar ion beam current Mattia Manzolaro & the SPES target group 30/06/2011 cathode current fixed at 330 A

5. 3. Effect of the cathode current Mattia Manzolaro & the SPES target group 30/06/2011 a = 1.5 mm d = 12 mm VV I CATHODE = 300 A I CATHODE = 360 A

6. 3. Effect of the cathode current Mattia Manzolaro & the SPES target group 30/06/2011

7. 3. Effect of the cathode current Mattia Manzolaro & the SPES target group 30/06/2011 reproducibility

8. 4. Effect of the anode voltage Mattia Manzolaro & the SPES target group 30/06/2011

9. 4. Effect of the anode voltage Mattia Manzolaro & the SPES target group 30/06/2011 OBSERVATION: during the monitoring of the anode voltage effect with the cathode current fixed at 350 A the cathode has probably undergone a plastic permanent deformation, in particular a reduction of the anode-cathode gap; during the subsequent tests both the anode and the beam current registered higher values. An accurate measurement of the cathode permanent deformation will be performed at the end of the tests and the compatibility with the current variations will be verified thanks to the “Child-Langmuir equation”

10. 5. Ar ionization efficiency estimation Mattia Manzolaro & the SPES target group 30/06/2011 WIP

11. 6. Emittance measurements Mattia Manzolaro & the SPES target group 30/06/2011 WIP

12. 7. ICIS2011: poster session and proceeding Mattia Manzolaro & the SPES target group 30/06/2011

13. 8. The work schedule for the next month (July) Mattia Manzolaro & the SPES target group 30/06/2011 The schedule for the next measurements (June/July): 1- Effect of V_anode on the beam current value keeping constant the cathode current at 330A and at 350A (Ar beam). 2- Effect of the cathode current on the beam current value keeping constant V_anode at different values (Ar beam). 3- Ar ionization efficiency estimation. 4- Tests 1, 2 and 3 to repeat using Xe instead of Ar. 5- Emittance measurements. 6- Stability tests (10 hours of stable functioning or more). 7- Sn ionization efficiency measurements. DEADLINE: 30 th of July (Mattia) First version of the ICIS2011 paper (3 pages for both SIS and PIS)

14. Note Mattia Manzolaro & the SPES target group 30/06/2011 - ***