RAL/ISIS (ION SOURCE, CHOPPER, RFQ beam dynamics, engineering)

1. Ion source 70 mA, 2 ms, 10 % dc 3 Soleniod LEBT RFQ, 324 MHz, 3 MeV MEBT, chopper Plans and Costs Front End Test StandAim is to demonstrate a 60 mA, 2 ms , 50 pps chopped beam at 3 MeV RAL/ISIS (ION SOURCE, CHOPPER, RFQ beam dynamics, engineering) RAL/ASTeC (MEBT beam dynamics, RF cavities) Imperial College (LEBT & RFQ beam dynamics, DIAGNOSTICS, engineering) Warwick University (LEBT beam dynamics & solenoid field design)

2. Ion Source 2005 2006 2007 2008 2009 Purchase power supplies Prepare R8 Manufacture vacuum vessels Manufacture 4 additional top loading ion sources Design and build HV platform and cage Ancillary wiring Assemble ion source Commission ion source Characterise ion source

3. LEBT – Plans for the near Future Work already performed : • Rough calculation of beam transport for different lens options based on available source emittances => 3 solenoid option choosen • Detailed calculation of beam transport for 3 solenoid optionbased on available source emittances. => Results are quite sensitive to initial emittance and degree of SCC • Detailed analysis of input emittance given by simulation of beam extraction and from emittance measurements (x,x’ and y,y’). => further information required – design & construction of a pepperpot emittance measurement device started. This year to do : • Determination of source emittance using pepperpot method, transversal density distribution of the ions and the degree of space charge compensation • Finalisation of particle dynamics calculation for the LEBT • Final design of magnetic fields of the lenses • Start of the mechanical Design of lenses and the LEBT

4. LEBT 2005 2006 2007 2008 2009 Determination of source emittance Particle dynamics Design of magnetic fields of the lenses Mechanical Design of lenses Mechanical Design of LEBT Determination of beam parameters at LEBT entrance Production of Lenses Assembly of LEBT Commisioning of LEBT Determination of beam parameters at RFQ entrance

5. Diagnostics - 1 What do we need to know ? • Beam current - I(t) at the exit of : Ion source, LEBT, RFQ and Chopper (MEBT) => use of current transformers (conventional, non destructive) • Degree of space charge compensation – Fk/Fuk at the exit of : Ion source, LEBT => use of residual gas ion spectroscopy (non destructive) => design of spectrometer started, grant application written • Transversal beam density profile & Halo – r (x,y,t) at the exit of : Ion source, LEBT, RFQ and Chopper (MEBT) => use of flying wires (conventional, destructive) =>use of laser detachment – “Lasertomography” (non destructive, design phase started, grant application required)

6. Diagnostics - 2 • What do we need to know ? Transversal beam emittance – e (x,x’,y,y’,t) at the exit of : Ion source, LEBT, RFQ and Chopper (MEBT) => use of Allison scanner (destructive, available) => use of pepperpot (destructive, under construction) => use of laser detachment (non destructive, design phase) • Longitudinal beam emittance – energy spread – e (z,z’,t) at the exit of : RFQ and Chopper (MEBT) => use of magnetic spectrometer (destructive, “available”) => use of laser detachment TOF (non destructive, design phase) To intensify the work on the beam diagnostics in the near future, D. Lee (Ph. D student, Imperial) has joined the team and will work on Laser tomography and it is planned that C. Gabor (Ph.D on beam diagnostics using laser neutralisation at Frankfurt University) will join in spring and work mainly on the laser based emittance scanner.

7. Diagnostics 2005 2006 2007 2008 2009 Determination of source emittance - Pepperpot Mechanical design & assembly of RGIES Design of laser based profile measurement Mechanical design & assebmly of laser based profile measurement Commisioning of laser based profile measurement Design of laser based emittance measurement Mechanical design of laser based emittance measurement Assembly laser e Commisioning of laser e Design & assembly of conventional diagnostics

8. RFQ 2005 2006 2007 2008 2009 Decision of frequency = 324 MHz Particle dynamic design (field level, Kilpatrick) => Length of RFQ Electro dynamic design of resonator and Endplates => Choice of RFQ type Electro dynamic design of tuners, couplers Design of models, production and tests of models Mechanical design of RFQ, Endplates, Positioners Mechanical design of tuner, couplers, etc Production of RFQ Production of tuner, couplers, and support Assembly of RFQ, test and commissioning

9. Chopper & MEBT 2005 2006 2007 2008 2009

10. FETS 2005 2006 2007 2008 2009 Ion source LEBT DIAGNOSTICS RFQ CHOPPER MEBT Design Construction & Commissioning

11. Cost estimate • Ion Source (Sources: £ 13 000, HV : £ 6 000, Mag. : £ 11 000, Anc. £ 50 000) £ 80 000 • LEBT (Lenses : £ 30 000, Mech : £ 15 000, Anc. : £ 25 000) £ 70 000 • RFQ (Models: £ 10 000, RFQ : £ 100 000, Anc. (Tuners…) : £ 60 000) £ 170 000 • MEBT & CHOPPER (Models: £ 150 000, Chopper : £ 100 000, MEBT : £ 210 000,……) £ 460 000 • DIAGNOSTICS (Laser: £ 100 000, e : £ 50 000, r :£ 30 000, Conv : £ 70 000) £ 250 000 • RF (Klystron: £ 400000, MEBT : £ 50000, Distr & Contr. : £ 100000) £ 550 000 • Total =========== £ 1 580 000 Already app. £150 000 has been spent on RF, vacuum components, power supplies etc. Funded by : HP-NIS & HIPPI (EU), ASTeC, CCLRC, PPARC To be able to fulfil the tough time schedule additional workforce is required : • Project management for R8 refurbishment (50%) • Electrical engineer for refurbishment of R8 (50 %) • Engineer for RF power (additionally to Aaron)