Introduction of SNS Extraction Kicker Power Supply

1
Introduction of SNSExtraction Kicker Power
Supply

• Jianlin Mi
• June 21, 2001

2
Design Description

• There are 14 kicker pulse power supplies driving
  14 magnets located at a long straight section
  (section D)
• The Kicker Power Supply will be operated at a 60
  Hz repetition.
• The kicker modulator provides a fast pulse
  current to kick the beam out of the ring in a 250
  nS beam gap.
• A 750nS pulse flat top period is required.

3
Kicker Power Supply Design Parameter

• Kicker 14
• kicker inductance
• magnet current
• High voltage
• pulse rise time
• pulse width
• Pulse repetition

4
EXTRACTION SYSTEM LAYOUT DIAGRAM
5
Kicker Power Supply Diagram
6
Kicker PFN Simulation Circuit
7
Kicker PFN Simulation Current Waveform
8
Blumlein PFN Tank Design and Parts

• CX1925 thyratron as the high voltage switch
• high voltage oil capacitor
• high power ceramic disc resistor
• lower impedance

• Two PFN in series
• 15 LC sections/PFN
• Each PFN impedance 6.25 ?
• Silicon liquid as dielectric materiel

9
EEV Thyratron CX1925

• EEV
• HV 80kV
• Peak current 15 kA
• repetition 2k Hz
• Life time 3 year

10
HIGN VOLTAGE CAPACITOR

• 50 KV/50 reversal V
• Peak current 10kA

• 5nF/1nF
• 10nH inductance

11
High Energy Disk Resistors

• HVR Advanced Power Components
• High Surge Energy 110kJ
• High voltage(28.3kV)
• Low Inductance
• 10 Disk ( 2.5 Ohm) resistors

12
Blumlein PFN Tank
13
PFN SCHMETIC
14
Charging Power Supply Cabinet

• Pulse capacitor charging power supply
• Thyratron filament and reservoir power supply
• Thyratron grid and bias
• Trigger generator control unit
• Status control
• Control interface

15
Charging Power Supply Cabinet( continue)

• 50 kV Capacitor Charging P.S. (ALE802)
• Thyratron Bias and Prime
• Filament and Reservoir Driver
• PS Control Box
• Control Interface
• Trigger Generator

16
HV Charging Power Supply

• 50 kV, 8kW
• Charging Rate 8kJ/sec
• Charging Load Capacitance 90 nF
• Charging Time 13 mS( 35kV)
• Repetition 60 Hz

17
Trigger Generator
18
Pulse Delay Generator
19
Conclusion

• PFN
• Design Complete
• PFN Tank
• Parts, Cap
• Charging Power Supply
• HV power supply 802
• DG535
• Trigger
• Station driver
• protection