1. PS System for DRFS PS System for Diode-type klystrons
M. Akemoto, KEK
PS System for Diode-type klystrons
PS System for Modulation-anode-type klystrons

2. PS system for Diode-type klystrons2 3
(0V)
6.6 kVAC, 3φ
VCB
Transformer
Input:6.6kV
Output:
420V,
200V,
100V
Klystron #1
Klystron #13
Marx
Modulator
Heater Trans.
Oil Tank 7 1 HK
HV cable
Heater PS H
Klystron
Heater/Cathode
HV Box #1 6 4 5
Control 8
6.6kV Main Power Line
Klystron system connected to HV cables in parallel

3. Cost Estimation List No. Component Quantity Suppliers Specification 1
VCB
Toshiba, Mitsubishi
6.6 kV , 3φ, 100 A fault current 2
Transformer
Nichicon
6.6 kV, 3φ / 420 V,3φ, 200 V, 1φ, 100 V,1φ,
300 kVA 3
Marx Modulator
DTI, SLAC, PPJ
67.5kV, 273 A, 2.4 ms, 5 Hz 4
Heater PS
Matsusada,Takasago
134V, 18.3 A, 3 kVA, Constant current 5
Heater Trans. Oil Tank
NTD
200 V AC, 3 kVA, 80 kV Isolation Trans. 6
Klystron Heater/Cathode HV Box 13
KEK, NTD
HV floating 7
HV Cable -
Fujikura
RG-220/U , 150 kVAC 8
Control
PLC, optical link

4. Marx Modulator 3 Performance requirements 67.4 kV peak voltage
273 A peak current
2.4 ms pulse width
5 Hz pulse repetition frequency
+/- 0.5% flat top
221 kW average power
<20 J deposited into klystron from gun spark
Input voltage 3φ, 420 VAC, 50 Hz

5. PS system for Modulation-anode-type klystrons6 2 3
Crowbar Circuit
(0V)
Droop compensation PS
6.6 kVAC, 3φ
VCB
Transformer
Input:6.6kV
Output:
420V,
200V,
100V
Klystron #1
Klystron #13
Switching PS
MA modulator MA
Spark Gap Switch
Anode
Pulser 1 10 HK
HV cable
Heater PS H 4 5
Klystron
Heater/Cathode
HV Box #1 9 7 8
Control 11
6.6kV Main Power Line

6. Cost Estimation List No. Component Quantity Suppliers Specification 1
VCB
Toshiba, Mitsubishi
6.6 kV , 3 phase, 100 A fault current 2
Transformer
Nichicon
6.6 kV, 3φ / 420 V,3φ, 200 V, 1φ, 100 V,1φ 300 kVA 3
DC Switching PS
Matsusada, Nichicon
-65.8 kV, 166 kW 4
Capacitor bank
44 µF,-65.8 kV 5
Crowbar circuit
Ignitron or gap switch 6
Droop compensation PS
PPJ, Nichicon, Matsusada, DTI
-13 kV, 263 A peak, 2,4 ms 7
Heater PS
NTD
200 V AC, 3 kVA, 80 kV Isolation Trans. 8
MA modulator
Nissin,Nichicon
-53 kV, 2.4 ms, 5 Hz 9
Klystron Heater/Cathode HV Box 13
KEK, NTD
HV floating 10
HV Cable -
Fujikura
RG-220/U , 150 kVAC 11
Control
PLC, optical link

7. Summary We have designed two kind of PS Systems for DRFS.
Now, we ask some companies to estimate the cost, size of the system components.
We will compare them and decide the PS system for DRFS.