GPTA - Gesellschaft fuer physikalisch-technische Anwendungen mbH

We offer standard pulse generators with +/-100V and +/-1000V maximum output amplitudes. Custom designs are available on demand. Each pulse generator is equipped with two outputs providing two synchronized high voltage pulses with opposite polarities. The amplitudes of both outputs are independently adjustable. Thus, with a 1000V maximum amplitude pulse generator you can supply a pulsed voltage difference of up to 2000V within a risetime of better than 15ns (10% to 90% points of leading edge).

One of the most crucial characteristics of a high voltage pulse generator used for TOF measurements is quite often NOT the maximum repetition rate but rather the maximum duty cycle which is the ratio of the time when a pulse can be supplied to the time the generator needs to recharge its output devices. A high maximum duty cycle ensures a good reproducibility of the pulses and avoids measuring artefacts caused by pulse length or amplitude jitter. The maximum permanent duty cycle for our 1000V pulse generator is 5 per cent. When triggered with a non periodical signal, the burst duty cycle for up to three consecutive pulses is 50 per cent. The maximum repetition rates of our 100V and 1000V maximum amplitude pulse generators are 100kHz and 20kHz, respectively.
Our pulse generators are designed for purely capacitive loads of up to 80pF. No resistive terminators are required, saving you trouble with high power terminators. In particular for experiments under vacuum conditions this can be a big relief. Our pulse generators are not suited to pulse resistive loads requiring a high average power throughput.

The pulse shape is characterized by an overall amplitude drift of less than 1 per cent over 10.000ns and a maximum overshoot of less than 10 per cent at the leading edge. In general every experimental setup has to be tuned for best pulse shape results. The above characteristics were achieved with a parallel plate spectrometer tuned with an additional capacitor. The high voltage pulse was supplied via a SHV-5 high voltage vacuum feedthrough.
The amplitude's jitter is less than 0.5 per cent. This holds over the whole range of duty cycles given above. The high burst duty cycle of 50 per cent and the low amplitude's jitter ensure the reproducibility of the pulses under almost any triggering conditions. This is crucial for experiments where the pulse generator is triggered with a physical event which does not appear strictly periodical but statistically distributed, e.g. coincidence measurements.

Because of the purely capacitive output load, each pulse generator's total power throughput is less than 20W. Our pulse generators are equipped with wide range power supplies, running on any input voltages between 90VAC and 230VAC without requiring any external adjustment. The standard pulse generator's frame fits into a 19" rack requiring 3 units of height.


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High Voltage Pulse Generators
Characteristics: Amplitudes up to +/- 1000V Risetimes better than 12ns Permanent maximum duty cycle better than 5% Burst duty cycle better than 50% Two synchronized outputs with independent amplitudes of opposite polarities Excellently reproducible rectangular pulse shape Purely capacitive loads Compact 19" design Applications: High resolution time-of-flight measurements Imaging and Coincidence Imaging experiments Coincidence measurements with statistical triggering

Download HV-PLS 1000 specifications sheet here (PDF format).
Our high voltage pulse generators are optimized for pulsed field time-of-flight (TOF) measurements using periodical and statistical pulse triggering. The benchmarks of the design are maximum peak shape quality and reproducibility under any triggering conditions. The pulse generators are produced in Germany exclusively for GPTA by Dr. Heller Elektronik KG, Gstadt am Chiemsee. Amplitudes and risetimes We offer standard pulse generators with +/-100V and +/-1000V maximum output amplitudes. Custom designs are available on demand. Each pulse generator is equipped with two outputs providing two synchronized high voltage pulses with opposite polarities. The amplitudes of both outputs are independently adjustable. Thus, with a 1000V maximum amplitude pulse generator you can supply a pulsed voltage difference of up to 2000V within a risetime of better than 15ns (10% to 90% points of leading edge). Repetition rates, duty cycles and loads One of the most crucial characteristics of a high voltage pulse generator used for TOF measurements is quite often NOT the maximum repetition rate but rather the maximum duty cycle which is the ratio of the time when a pulse can be supplied to the time the generator needs to recharge its output devices. A high maximum duty cycle ensures a good reproducibility of the pulses and avoids measuring artefacts caused by pulse length or amplitude jitter. The maximum permanent duty cycle for our 1000V pulse generator is 5 per cent. When triggered with a non periodical signal, the burst duty cycle for up to three consecutive pulses is 50 per cent. The maximum repetition rates of our 100V and 1000V maximum amplitude pulse generators are 100kHz and 20kHz, respectively. Our pulse generators are designed for purely capacitive loads of up to 80pF. No resistive terminators are required, saving you trouble with high power terminators. In particular for experiments under vacuum conditions this can be a big relief. Our pulse generators are not suited to pulse resistive loads requiring a high average power throughput. Pulse shape and jitter The pulse shape is characterized by an overall amplitude drift of less than 1 per cent over 10.000ns and a maximum overshoot of less than 10 per cent at the leading edge. In general every experimental setup has to be tuned for best pulse shape results. The above characteristics were achieved with a parallel plate spectrometer tuned with an additional capacitor. The high voltage pulse was supplied via a SHV-5 high voltage vacuum feedthrough. The amplitude's jitter is less than 0.5 per cent. This holds over the whole range of duty cycles given above. The high burst duty cycle of 50 per cent and the low amplitude's jitter ensure the reproducibility of the pulses under almost any triggering conditions. This is crucial for experiments where the pulse generator is triggered with a physical event which does not appear strictly periodical but statistically distributed, e.g. coincidence measurements. Power supply and dimensions Because of the purely capacitive output load, each pulse generator's total power throughput is less than 20W. Our pulse generators are equipped with wide range power supplies, running on any input voltages between 90VAC and 230VAC without requiring any external adjustment. The standard pulse generator's frame fits into a 19" rack requiring 3 units of height. Download HV-PLS 1000 specifications sheet here (PDF format).
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