RF Status 1 4 High Power Amplifier circuits available CERN(2) one working at 88MHz One in pieces, one working spare for linac Berkeley(2) as yet seen – visit planned last week of August Some information – not without cost…. Cost of New Amplifier ~ 70k
PAC 1991
RF Status 2 TH271 Drivers – amplifiers & tubes available at CERN (4-5) 4616 Drivers available at Los Alamos (4) Currently in use – expected ?
Possible Schemes 8x 1MW Option 4x 3MW Option One amplifier chain per cavity Lack 4 Amplifier circuits 4x 3MW Option One amplifier shared to two cavities Need load and circulator per cavity Assumes 4 amplifier circuits reused
4x 3MW CAVITIES LOAD 1 to 1.5 MW 100 to 150 kW TH116 4616 LOAD MATCHED POWER SPLITTERS 1 to 1.5 kW R.F. DRIVE LOAD TH116 4616 LOAD 70db COUPLERS CIRCULATORS R.A.CHURCH R.A.L.
8x 1MW CAVITY 1 kW 10 mW 1. To 1.5MW 100 kW 70db COUPLER TH 116 AMPLITUDE AND PHASE CONTROL 4616 SOLID STATE DRIVER R.F. SOURCE R.F. SOURCE TO SEVEN OTHER PHASE AND AMPLITUDE CONTROL SYSTEMS R.A. CHURCH R.A.L.
Costs
£ Cost comparison 8x Option 4x Option 4 new circuits ~ 280k 4 extra 4616 tubes ~120k Extra controls etc ~200k = 600k 4x Option 8 circulators, ~480k 8 loads ~80k 4x splitters ~16k = 576k
Suggested Plan Choose 8x option - Build in two phases Phase I Phase II Initially re-use available kit Power 4 x 1 MW into 4 cavities ~ 1000k est Phase II Construct new circuits Power 8 x 1 MW into 8 cavities