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Febetron

The Febetron is a reg. trade-mark of the Field Emission Corp. http://hibp.ecse.rpi.edu/~leij/febetron/febetron.html. It uses the principle of a Marx generator to produce high energy pulses.

Specifications

Model 2020 Pulser

Output Voltage: 2.3 Million Volts
Output Current: 6000 Amperes
Output Impedance: 380 Ohms
Weight: 4360 pounds
Nominal Pulse Width: 50 nano-seconds
Maximum Charging Time: 4.98 seconds
Maximum Energy Storage: 872.2 Joules
Dimensional Drawing:

Model 1547 Delayed Trigger Amplifier

The Model 1547 Delayed Trigger Amplifier is used to produce a known and reproducible time delay between the occurrence of an event-associated trigger signal and the discharge of the Febetron Pulser. It shapes, delays and amplifies the externally derived trigger signal and delivers a suitable high voltage pulse through the Model 3435 Trigger Transformer to the trigger gap in the Pulser thus Discharging the Pulser.

Delay Range:

1 micro-second to 100 milli-second, continuously variable in 5 rangers, plus a bypass position which switches the delay generator out of the circuit.

Delay Accuracy:

Better than 5% of the maximum delay on each range, at all delay setting over 2 micro-seconds. A 10 V change in power line voltage will produce a 0.2% change in the delay.

Delay Resolution:

Better than 0.2% of the maximum delay on each range.

Internal Jitter:

Less than 0.2% of the delay setting.

Trigger Requirement:

Input trigger must be a positive pulse with a 15-200 V amplitude, less than 100 nano-seconds rise time and a duration of 1-3 micro-seconds measured between the 50% amplitude points. When the RANGE switch is in the OUT position, minimum trigger amplitude is approximately 30V.

Trigger Input Impedance:

50 ohms

Delayed Trigger Output:

0.1 micro-Farad capacitor charged to 2500 V dc switched across output, producing a negative 2500 V pulse. Waveform depends upon external load.

Maximum Repetition Rate:

10 pulses per second on the 10 and 100 micro-second and the 1 milli-second ranges. One pulse in 5 seconds on the 10 and 100 milli-second ranges. 10 pulses per second may also be used with the delay generator switched out.

Power Requirements:

105-125 V, 50-60 Hz, 100 W

Discharge Triggering

In order for the Febetron to be useful as a high voltage pulsed source, it must be possible to reproducibly predict the time delay between the occurrence of an event-associated trigger signal and the discharge of the Febetron Pulser. A delayed trigger amplifier is used for this purpose, in which a trigger signal is shaped, delayed, and subsequently amplified to produce a suitable input pulse to the pulser trigger transformer.

The trigger transformer primary takes as input the 2,500 V amplified trigger signal from the delayed trigger amplifier, and outputs a 17,500 V trigger pulse to the trigger gap of the first Pulser Column stage.

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The Febetron is a reg. trade-mark of the Field Emission Corp. http://hibp.ecse.rpi.edu/~leij/febetron/febetron.html. It uses the principle of a Marx generator to produce high energy pulses.

Specifications

Model 2020 Pulser

Output Voltage: 2.3 Million Volts

Output Current: 6000 Amperes

Output Impedance: 380 Ohms

Weight: 4360 pounds

Nominal Pulse Width: 50 nano-seconds

Maximum Charging Time: 4.98 seconds

Maximum Energy Storage: 872.2 Joules

Dimensional Drawing:

Model 1547 Delayed Trigger Amplifier

Delay Range:

1 micro-second to 100 milli-second, continuously variable in 5 rangers, plus a bypass position which switches the delay generator out of the circuit.

Delay Accuracy:

Better than 5% of the maximum delay on each range, at all delay setting over 2 micro-seconds. A 10 V change in power line voltage will produce a 0.2% change in the delay.

Delay Resolution:

Better than 0.2% of the maximum delay on each range.

Internal Jitter:

Less than 0.2% of the delay setting.

Trigger Requirement:

Input trigger must be a positive pulse with a 15-200 V amplitude, less than 100 nano-seconds rise time and a duration of 1-3 micro-seconds measured between the 50% amplitude points. When the RANGE switch is in the OUT position, minimum trigger amplitude is approximately 30V.

Trigger Input Impedance:

50 ohms

Delayed Trigger Output:

0.1 micro-Farad capacitor charged to 2500 V dc switched across output, producing a negative 2500 V pulse. Waveform depends upon external load.

Maximum Repetition Rate:

10 pulses per second on the 10 and 100 micro-second and the 1 milli-second ranges. One pulse in 5 seconds on the 10 and 100 milli-second ranges. 10 pulses per second may also be used with the delay generator switched out.

Power Requirements:

105-125 V, 50-60 Hz, 100 W

Discharge Triggering

The trigger transformer primary takes as input the 2,500 V amplified trigger signal from the delayed trigger amplifier, and outputs a 17,500 V trigger pulse to the trigger gap of the first Pulser Column stage.