PROGRESS ON THE KLYSTRON MODULATORS CHARGERS FOR CLICSklavounou Eleni

TE – EPC – FPC

OPTIMIZATION STRUCTURE

We are creating models to be integrated in a global optimization environment.

ChargerBandwidthCharger (internal ) capacitorCharger sizeCost Efficiency Power fluctuation

GridActive power fluctuationMaximum powerVoltage level

PFSVoltage droopPrecision (voltage reproducibility)

ChargerPulse Forming

System(PFS)

KlystronC

Modulator

Grid

Specifications and / or constraints

Specifications and / or constraints

GridActive power fluctuationMaximum powerVoltage level

PFSVoltage droopPrecision (voltage reproducibility)

Specifications and / or constraints

Specifications and / or constraints

ChargerBandwidthCharger (internal ) capacitorCharger sizeCost Efficiency Power fluctuation

Objectives or constraints

Variables (topology selection and dimensioning)

Part of the global optimization

SIZE OF CHARGER AND CAPACITOR BANK

Charger size: waiting offers from Heinzinger, Fug, Technix.

Capacitor size: AVX Film Capacitors

0 2000 4000 6000 8000 10000 12000 14000 16000 18000 200000

10000

20000

30000

40000

50000

60000

Capacitor Bank Size

Capacitor Energy (J)

Volu

me(c

m3

)

SIMULATIONS

If we want a constant charging power:

Charging Current

Ideal charging current

Very high bandwidth

charger needed

SIMULATIONS

If we model the capacitor charger as a 2nd order transfer function:

Power Consumption

SIMULATIONSResult: Power fluctuation as a function of the

bandwidth of the charger.

0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2

x 104

0

5

10

15

20

25

30

35Power Fluctuation of the charger (in %)

Cutting frequency (Hz)

Po

wer

Flu

ctu

atio

n (

%)

1st order systemz=0,3z=0,5z=0,7z=1

SIMULATIONS Now, we are studying a capacitor charger

topology considering the internal capacitor as a second “filter”.

Which are the compromises between the internal capacitance and the bandwidth?

AC

DC

DC

DC

C_internalC_bank

Capacitor Charger

Merci pour votre attention.

At your disposal for any questions.