1. 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

2. PAC 1991

3. RF Status 2 TH271 Drivers – amplifiers & tubes available at CERN (4-5)
4616 Drivers available at Los Alamos (4)
Currently in use – expected ?

4. 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

5. 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.

6. 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.

7. Costs

8. £ 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

9. 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