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Paul Drumm 30 March 2004 MICE at RF Power System: power source, distribution Paul Drumm RAL Ambitious title!
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Paul Drumm 30 Mar 2004 RF Baseline Design RF Power Design driven by cost issues (no funds for a new system) –Optimal – one amplifier per cavity 2 Amplifiers from LBNL = 4 MW total 1 or 2 Amplifiers from CERN = 4 MW total –If 1 amplifier – needs a bigger drive? Spare TH116 Tubes from ISIS Split or more amplifiers? –Circulator – cavity ↔ amplifier isolation –Hybrid device - possibly cheaper – some coupling? –Assume that we do R&D (trials) when we have the equipment Need both cavities and one amplifier circuit Test out a hybrid circuit driving two cavities
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Paul Drumm 30 Mar 2004 Progress since October CM December LBNL –Discussed shipping equipment to RAL –Two 2 MW power amplifier circuits –Three (300kW) driver circuits –4616 test stand –LBNL loan – to be written off (eventually) –MoU to be signed
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Paul Drumm 30 Mar 2004 … December At LBNL –Stripping down for transport –Cleaning –Packing –Shipping…
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Paul Drumm 30 Mar 2004 LBNL Power Amps
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Paul Drumm 30 Mar 2004 300 kW Driver Amplifier
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Paul Drumm 30 Mar 2004 4616 Test box
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Paul Drumm 30 Mar 2004 Staff… Roy Church –Used up quota of days –No Roy till April RF group at the Daresbury SRS –Mike Dykes (group leader) –Andy Moss (senior RF Engineer) –plus two more –MD & AM are here… ASTeC
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Paul Drumm 30 Mar 2004 Plan for Early 2004 Limited funds –Berkeley RF system to DL –Strip down and make a technical assessment of the equipment Cost to refurbish Confirm equipment is serviceable –6 month overlap with Roy Review RF design in the light of CERN RF proposal
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Paul Drumm 30 Mar 2004 For Late FY 2004 Setting up a test-stand at DL –Hall and facilities available –Need to have got through GW2 i.e. be in full funding mode
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Paul Drumm 30 Mar 2004 RF Power Systems 8 MW of RF Power @ 1Hz and 1 ms Expensive to buy new 201.25 MHZ common to old linacs –LBNL, CERN, ISIS, KEK, Los Alamos 4 MW from LBNL (2x2MW) + ISIS valves 4 MW from CERN + new valve ? How to transmit the power ? –Cheaper, hybrid –Expensive, low risk
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Paul Drumm 30 Mar 2004 Split – Circulator - RF Scheme R.F.LEVEL R.F. LEVEL SUM CIRCULATOR PHASE SHIFTER R.F. SOURCE33kV H.T. 18kV H.T. TUNE ERROR CAVITY PHASE PHASE DET TH116 2.5MW 4616 250kW SOLID STATE DRIVER R.F. LEVEL AND PHASE CONTROL CAVITY PHASE F R 70db COUPLER MATCHED POWER SPLITTER CAVITY LOAD
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Paul Drumm 30 Mar 2004 Baseline ? 4 MW Transmitter 2 MW Transmitter Master Oscillator 201 MHz Cavity Module 3 db Hybrid & Load Matched Splitter Circulator & Load
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Paul Drumm 30 Mar 2004 ISIS Linac - RF System
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Paul Drumm 30 Mar 2004 TH116 Thales 5 MW tube –ISIS uses 1 or 2 tubes per year –Few customers for this tube –Thales: success in small numbers not good looking at large orders 10-20 tubes –Alternative tubes (?) 2 MW – splitting…
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Paul Drumm 30 Mar 2004 X-Ray Shielding – Conditioning/Running Control Rooms
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