Ion source 70 mA, 2 ms, 10 % dc
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RAL/ISIS (ION SOURCE, CHOPPER, RFQ beam dynamics, engineering) PowerPoint PPT Presentation


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Ion source 70 mA, 2 ms, 10 % dc. 3 Soleniod LEBT. RFQ, 324 MHz, 3 MeV. MEBT, chopper. 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, RFQ beam dynamics, engineering)

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

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Ral isis ion source chopper rfq beam dynamics engineering

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)


Ion source

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


Lebt plans for the near future

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


Ral isis ion source chopper rfq beam dynamics engineering

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


Diagnostics 1

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)


Diagnostics 2

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.


Diagnostics

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


Ral isis ion source chopper rfq beam dynamics engineering

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


Chopper mebt

Chopper & MEBT

2005

2006

2007

2008

2009


Ral isis ion source chopper rfq beam dynamics engineering

FETS

2005

2006

2007

2008

2009

Ion source

LEBT

DIAGNOSTICS

RFQ

CHOPPER

MEBT

Design

Construction & Commissioning


Cost estimate

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)


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