imperial college 1 plans and costs front end test stand aim is to demonstrate a 60 ma, 2 ms, 50 pps...
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![Page 1: Imperial College 1 Plans and Costs Front End Test Stand Aim is to demonstrate a 60 mA, 2 ms, 50 pps chopped beam at 3 MeV RAL/ISIS (ION SOURCE, CHOPPER,](https://reader035.vdocument.in/reader035/viewer/2022062409/56649f175503460f94c2e270/html5/thumbnails/1.jpg)
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Imperial CollegePlans 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)
RFQ, 324 MHz, 3 MeV
MEBT, chopper
Ion source 70 mA, 2 ms, 10 % dc
3 Soleniod LEBT
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Imperial College
Ion Source
2006 2007 20092005 2008Purchase 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
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Imperial College
LEBT – Plans for the near FutureWork already performed :
• Rough calculation of beam transport for different lens optionsbased on available source emittances=> 3 solenoid option choosen
• Detailed calculation of beam transport for 3 solenoid option based 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
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Imperial CollegeLEBT
2006 2007 20092005 2008Determination 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
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Imperial CollegeDiagnostics - 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 – k/uk
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 – (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)
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Imperial CollegeDiagnostics - 2
• What do we need to know ?Transversal beam emittance – (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 – (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.
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Imperial CollegeDiagnostics
2006 2007 20092005 2008Determination 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
Commisioning of laser
Design & assembly of conventional diagnostics
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Imperial CollegeRFQ
2006 2007 20092005 2008
Decision of frequency = 324 MHzParticle 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
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Imperial CollegeChopper & MEBT
2006 2007 20092005 2008
Representative prototype lumped line test
Representative prototype meander line test
Pre-production meander line test
Pre-production lumped line test
RF cavity and quadrupole design
MEBT RF design
Chopper manufacture
MEBT design
MEBT construction
Assembly of MEBT & Chopper - Commissioning
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Imperial CollegeFETS
2006 2007 20092005 2008
Ion source
LEBT
DIAGNOSTICS
RFQ
CHOPPER
MEBT
Construction & CommissioningDesign
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Imperial CollegeCost 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, : £ 50 000, :£ 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 : 1) Project management for R8 refurbishment (50%)2) Electrical engineer for refurbishment of R8 (50 %)
3) Engineer for RF power (additionally to Aaron)