1. Status of the Front End Test Stand April 2007

2. Infrastructure R8 refurbished Laser lab under construction Vacuum system for first section delivered Stands for accelerator ordered Basic electronic equipment for first phase delivered

3. Extensive experimental program underway on the IS rig. Main goal is the reduction of the source emittance by roughly a factor of 3. 57 mm Ion source development

4. Ion source – transversal density distribution as a function of extraction potential 5 kV Ext5.5 kV Ext6 kV Ext6.5 kV Ext 7 kV Ext8 kV Ext9 kV Ext11 kV Ext

5. LEBT- 1 st vacuum vessel design

6. LEBT Initial beam distribution based on pepper-pot data At end of LEBT  rms norm ~ 0.9  mm mrad 1% beam loss Universidad del Pais Vasco joined the collaboration => responsible for LEBT (in cooperation with Warwick) & beam dump 3D model of B-fields incorporated into simulations => slight increase in field strength required.

7. RFQ cold model The quality of the quadrants will be controlled by using a CMM and beat pull measurements will be performed before and after brazing. The 4 quadrants of the 4 vane RFQ cold model (l=0.5 m) are machined.

8. First RF measurements on the unbrazed RFQ cold model First tests of the cold model using new couplers showed a resonant frequency of ~ 323 MHz A very good field flatness has been measured using the beat pull method

9. MEBT and Chopper MEBT & Chopper: -Transition from particle trajectory design to real design - Incorporation of pumping ports etc. into design and reoptimisation of beam dynamics Hybrid quadrupoles: - The printed circuit electromagnet: A company near Newbury specialised in printed circuit boards manufacturing. In progress. - Daresbury Magnet Testing Group agreed to measure the PMQ in the next month. (Point by point measurement with a Hall probe). Particle dynamics: - Comparison between CERN and RAL design (IS to end of DTL) showed slightly better results for RAL solution - simulations with higher current are planned. - Code benchmarking in progress

10. MEBT & Chopper – code benchmarking TraceWin/Partran GPT Lattice: FETS Scheme ACodes: TraceWin/Partran, Trace3D, GPT

11. Pepper pot emittance measuring device Close up of the assembled grid head showing the quartz plate. The grid head is mounted to the cooled rod. The linear shift mechanism mounted to the main flange. Adjustable camera mount. Cooled feed through rod. Tungsten screen Copper block Scintillator screen H - Beamlets Fast CCD Camera H - Ion Beam A pepper pot device mounted on a linear stage for correlated measurements of the transversal phase space along beam propagation will be available soon.

12. Pepperpot data analyses test Camera res. = 49 microns/pixel Angle res. = 4.88 mrad Image width: 100mm x-x’ y-y’

13. Laser tomography Motion controller Rotary stage Amplifiers and power supplies Linear stage Encoders

14. Laser emittance negative ions, RG neutrals photo detached neutrals deflected negative ions R=477.5mm Arc length 500mm B = 0.522T Gap 136mm Width 200mm Deflection 60deg max. beam size ~R=20mm At the position of photon interaction can be detected a max. beam diameter of 40mm with +/-30mrad (a matched ion beam has app. 20mm and +/-20mrad).

15. Laser emittance vacuum vessel space for piezo driven stages

16. Summary & outlook Very good progress on all fields IS optimisation is a major physical challenge but first results are encouraging RFQ cold model pre tests started Infrastructure for first phase prepared Good collaboration with Spanish partners