HRR-TU-18kV-500Hz
500 mJ 500 Hz 40 kV
Key Parameters
• Maximum thyratron charge voltage: 40 kV
• Maximum repetition rate: 500 Hz
• Maximum energy per trigger pulse: 500 mJ
• Available diagnostics: Marx analog charge waveform and thyratron waveform (0-10 V full scale)
• Timing inputs: 820-nm fiber optic
APELC HRR-TU-18kV-500Hz General Specifications
Symbol Parameter Value Units
Epulse
Maximum Trigger Energy Per Pulse
500
mJ
Vth
Trigger Pulse Peak Voltage
40
kV
H
Rack Height
8.75
in
W
Front Panel Width
19
in
D
Rack Depth
20
in
Wt
Trigger Unit Weight
30
lbs
RRmax
Maximum Repetition Rate
500
Hz
Technology Summary
The APELC HRR-TU-18 trigger unit utilizes a thyratron-based pulse forming circuit to provide the trigger pulse to the Marx generator. The unit also conditions and routes optical signals from the delay generator to control the charge and inhibit cycles of the thyratron HVPS and the Marx HVPS. The trigger unit facilitates pulse charging of both the thyratron and the Marx generator. The pulse charging mode of operation minimizes high voltage DC degrading effects (e.g. corona) and provides a safer high voltage environment since the default state of all power supplies is inhibited.
Additionally, the trigger unit provides LED indicators (Figure 4 B-D) on the front panel for notification of thyratron HVPS conditions. Front panel elements labeled in Figure 4 are described in the following paragraphs. Two key system diagnostics, Marx HVPS Analog Out and Thyratron HVPS Analog Out are available on the front panel of the trigger unit. These two signals can be monitored on any 1- M? oscilloscope channel by connecting to the BNC jacks on the front panel.

APEAPELC High Repetition-Rate Trigger Unit with element key.

A
Thyratron HVPS LED indicators
B
Trigger fiber-optic input
C
Thyratron HVPS fiber-optic input - inhibit low
D
Marx HVPS fiber-optic input
E
Thyratron Heater power switch
F
Thyratron HVPS high voltage power switch
G
Thyratron analog output
H
Marx HVPS analog output

APELC HRR-TU-18kV-500Hz shown (above, far right) as part of the
APELC High Repetition Rate Marx Generator System.

Screen Capture of analog charge diagnostics for a 200 Hz Burst: Thyratron charge waveform (yellow) and Marx Charge waveform (blue).

Suggested Peripherals
System Requirements
Contact APELC
Berkeley Nucleonics 575 Delay Generator
110 VAC Prime Power Source
Phone: 512.264.1804
Any Lambda ALE High Voltage Power Supply
Fax: 512.264.1784
Any APELC Marx Generator System
APELC Output Diagnostics Marx flange
APELC integrated pressurized load module with CVR diagnostic