uknf osc meeting @ ral – 31 st january 2011 uknf - status, high lights, plans j. pozimski

UKNF OsC meeting @ RAL – 31st January 2011

UKNF - Status, high lights, plans

J. Pozimski

UKNF OsC meeting @ RAL – 6th June 2011

WP1 - Major achievements

IDR written, edited and published ECFA review Costing meetings – UKNF leading activity on NF Redesign of Target area for risk mitigation Investigation of particle dynamics in the baseline muon front end lattice and

investigation of the performance of alternative lattices Studies of power deposition in the target and pion capture area due to secondary

radiation Studies of solid and liquidized power jet targets for mercury risk mitigation Multi-particle simulations of the muon linac using field maps, comparison of

gained results from various software packages with good agreement in transversal and longitudinal particle dynamics and particle loss pattern.

Detailed studies of beam injection and extraction into the FFAG, studies of kicker and septum design as well as kicker electronics.

Further studies of FFAG magnets and particle tracking in fieldmaps. Further progress on common proton driver work (ISIS upgrade)


Heat load in target stationSimulation results


Target station design evolution


Front end design work

Muon Front End baseline description:

Longitudinal driftBuncher

Phase-Energy RotationIonisation Cooling

Risks and mitigations :

Transmission losses and secondary particles -> Chicane

RF break down in magnetic fields ->Bucket coil lattice


Chicane for secondary particle suppression

Heat deposition from secondaries is significant:

Three issues:

Activation of the linac

Heat load on superconductors

Radiation damage

Losses are 2-3 orders of magnitude too high → Mitigation:

Chicane for high momentum particles

Proton absorber for low momentum protons as protons stop quicker than pions/muons inmaterial

Transverse collimation


High power RF in magnetic field

Reduced magnetic field at RF cavities

May enable higheraccelerating voltage

Comparable transmissionFor identical number of cells(but longer footprint)

Increased magnetic field energy (and cost)

Slightly higher equilibrium Emittance


FETS


FETS Status

• Ion source operates at nearly design specs (2 ms, 50 mA) but persisting problems with heater electronics and spare parts• LEBT characterization nearly complete, but origin ofresidual source misalignment still unknown • Beam at injection into RFQ ~ 0.3-0.35 pimmmrad (measured)• Detailed study of influence of RFQ modulation on field flatness

finished and RFQ design adjusted.• RFQ beam dynamics frozen• Only a few principle design decisions for RFQ left (coupling)• Copper delivered waiting for manufacture• Drawings for manufacturing started – finished in August• Preliminary cost estimate for manufacture 160-200 k£ - 6 month• Circulator to be delivered in Summer – high power RF setup to be

finalized until autumn• Laser for diagnostics upgraded after first hints with Frankfurt laser

system.


FETS – RFQ fine tuningmatcher and modulation influence field flatness


Next Steps

• RFQ machining should start in September • High power RF setup to be finished in summer when circulator

arrives• Experimental programme involving cold model foreseen for summer - cooling test - high precision beat pull set-up at RHUL• Detailed plan for RFQ assembly and testing under development• MEBT mechanical design started• MEBT beam dump design started• FETS proposal in preparation

UKNF OsC meeting @ RAL – 31st January 2011

Summary

The IDR and numerous Publications, invited talks, PhD's, etc. 1 IDS plenary meeting 1 ECFA review (IDS, EUROnu) EUROnu plenary meeting and costing workshop EUROnu safety workshop this week Work package meetings and workshops Significant contribution to EMMA commissioning UKNF overall on schedule and budget

uknf osc meeting @ ral – 31 st january 2011 uknf - status, high lights, plans j. pozimski

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