8th ESLS RF Meeting – September 2004 RF System 1/23 Storage Ring RF System F. Perez

8th ESLS RF Meeting – September 2004 RF System 2/23 Contents Power Requirements Transmitter Options Low Level Electronics Approach Voltage Requirements Cavity Comparison

8th ESLS RF Meeting – September 2004 RF System 3/23 Power Requirements Beam current400mA Bending losses950keV/turn ID losses300keV/turn Other losses50keV/turn Total losses1300keV/turn Beam power520kW Energy Acceptance3%

8th ESLS RF Meeting – September 2004 RF System 4/23 Transmitter TWO power escenarios: –~150 kW –~300 kW THREE transmitter type escenarios –High Power Klystron –IOT combination –Solid State Amplifier

8th ESLS RF Meeting – September 2004 RF System 5/23 Transmitter For the case of ~300 kW IOT combination, we want to produce a combiner cavity prototype: E. Wooldridge, ASTeC Can also be used as a SSA combiner…

8th ESLS RF Meeting – September 2004 RF System 6/23 Low Level Electronics IQ (DE)MODULATION Digital or analogue A. Rohlev et al., CERN

8th ESLS RF Meeting – September 2004 RF System 7/23 Voltage Requirements

8th ESLS RF Meeting – September 2004 RF System 8/23 Cavity NC 100 MHz MAXlab NC 180 MHz BNIP SC 352 MHz SOLEIL NC 500 MHz ELETTRA, UE, … SC 500 MHz CORNELL

8th ESLS RF Meeting – September 2004 RF System 9/23 Cavity 100 MHz Total Voltaje2.0MV No Cells/IPC10 Type of cavitync Voltage / cell200kV R shunt 1,6M Cavity power12,5kW Beam power/cav52kW IPC power65kW Amplifier Power80kW Total Power800kW REJECTED : 10 ARE TOO MANY CAVITIES

8th ESLS RF Meeting – September 2004 RF System 10/23 Cavity 180 MHz Total Voltaje2.4MV No Cells/IPC4 Type of cavitync Voltage / cell600kV R shunt 4.3M Cavity power42kW Beam power/cav130kW IPC power172kW Amplifier Power180kW Total Power720kW

8th ESLS RF Meeting – September 2004 RF System 11/23 Cavity 180 MHz REJECTED : TOO MANY HOMs HOMs

8th ESLS RF Meeting – September 2004 RF System 12/23 Cavity 352 MHz Total Voltaje3.0MV No Cells/IPC2 4 Type of cavitysc Voltage / cell kV R shunt 4500M Cavity power00kW Beam power/cav260130kW IPC power260130kW Amplifier Power300150kW Total Power600600kW ON STANDBY : ONE modul is too less and TWO too much …

8th ESLS RF Meeting – September 2004 RF System 13/23 Cavity 500 MHz (1) Total Voltaje3.6MV No Cells/IPC6 Type of cavitync Voltage / cell600kV R shunt 3.4M Cavity power53kW Beam power/cav87kW IPC power140kW Amplifier Power160kW Total Power960kW 1st OPTION

8th ESLS RF Meeting – September 2004 RF System 14/23 Cavity 500 MHz (2) Total Voltaje3.6MV No Cells/IPC6 Type of cavitync Voltage / cell600kV R shunt 3.0M Cavity power60kW Beam power/cav87kW IPC power147kW Amplifier Power160kW Total Power960kW 2nd OPTION

8th ESLS RF Meeting – September 2004 RF System 15/23 Cavity 500 MHz (3) Total Voltaje3.6MV No Cells/IPC2 Type of cavitysc Voltage / cell1800kV R shunt 4500M Cavity power0kW Beam power/cav260kW IPC power260kW Amplifier Power300kW Total Power600kW 3rd OPTION

8th ESLS RF Meeting – September 2004 RF System 16/23 Cavity Comparison (1) ELETTRA(2) EU(3) CORNELL DC POWER2.5 MW2.6 MW2.1 MW WATER COOLING 220 m 3 /h230 m 3 /h140 m 3 /h Cavity Wall Dissipation Refrigerator

8th ESLS RF Meeting – September 2004 RF System 17/23 Cavity Comparison (1) ELETTRA(2) EU(3) CORNELL SPACE2 x 2.9 m 2 x 3.3 m 3 cavities in one 4 m straight 1 cavity in one 4 m straight COST ESTIMATION 9.3 M9.9 M10.6 M 6 x 1.55 M6 x 1.65 M2 x 5.1 M

8th ESLS RF Meeting – September 2004 RF System 18/23 Cavity Comparison RUNNING COST DIFFERENCES (1) ELETTRA(2) EU(3) CORNELL INVESTMENT-600 k1300 k DC POWER400 kW500 kW- RUNNING (10y) (6000 h/year) 2400 k3000 k- MAN POWER (10y) (1.5 man/year) k OVER 10 YEARS+300 k+900 k- SPACE, SERVICES and COST are NOT DECISION FACTORS

8th ESLS RF Meeting – September 2004 RF System 19/23 Comparison: Longitudinal HOMs Stability threshold for 400 mA

8th ESLS RF Meeting – September 2004 RF System 20/23 Comparison: Transverse HOMs Stability threshold for 400 mA

8th ESLS RF Meeting – September 2004 RF System 21/23 HOMs comparison (1)NC ELETTRA Needs:SC 3rd Harmonic Cavity Transverse Feedback (2)NC UE Needs:SC 3rd Harmonic Cavity (3)SC CORNELL Needs:None

8th ESLS RF Meeting – September 2004 RF System 22/23 Other Considerations 3rd Harmonic Cavity is interesting for the 3 cases to increase the Touschek lifetime Transverse Feedback will be needed for broadband impedance instabilities in any case, but for the SC option will be simpler SC option allows larger voltages (larger energy acceptance) Reliability of the SC systems has to be considered

8th ESLS RF Meeting – September 2004 RF System 23/23 CONCLUSION