For Beam Steering, Gating, Driving Grids and Other Capacitive (High Impedance) Loads
The PVX-41XX and PVM series pulse generators and modular pulsers are specifically designed to drive capacitive loads such as deflection plates and extraction grids. When applied to these elements in a time-of-flight mass spectroscopy instrument or a linear accelerator, these pulses can be used for electron or ion beam steering, gating, deflection, or extraction.
In addition to time-of-flight and linear accelerator applications, these pulsers can be used to drive any high impedance, capacitive load, including:
- Pockels cells and Q switches in LASER systems,
- Microchannel plates,
- Photomultiplier tubes,
- Control grids of power vacuum tubes, and
- Acoustic transducers
The PVX and PVM series pulse generators offer a number of benefits over other "high voltage switch" solutions:
- The PVX and PVM pulsers are half-bridge (totem-pole) designs, offering equally fast pulse rise and fall times;
- They are specifically designed to drive high impedance, capacitive loads such as grids, plates, Pockels cells and Q switches. They offer very high fidelity pulses, with fast rise and fall times and virtually no over-shoot, under-shoot or ringing;
- They are shipped with all mating connectors and cables; and can be connected directly to the load. They do not require series or shunt resistors, impedance-matching networks between the pulse generator and the load or external energy storage capacitors. These are all handled within the PVX pulse generator;
- The PVX and PVM series pulse generators have extensive circuitry to protect both the load and pulse generator in the event of an over-current condition (a short or an arc) at the load or in the interconnect cable. If an over-current condition is detected, the output of the pulse generator is terminated for approximately 1 millisecond, protecting the load, interconnect cables and the PVX pulse generator itself. The PVX automatically resets itself after the 1 millisecond period. If a fault is again detected, this shut-down/reset cycle will continue, otherwise the pulse generator will continue to operate as it did prior to the fault;
- The PVX and PVM pulsers use discrete, commercially-available components. They use air as their insulating medium, and the circuitry is not potted (encapsulated). In the unlikely event that a PVX pulser is damaged, it can be repaired to the component level;
- The PVX and PVM pulsers are all solid state direct-coupled designs,offering pulse widths to DC. Some competing products are vacuum tube-based switches, or use transformers that degrade pulse fidelity, and limit pulse width and/or maximum frequency;
- DEI technical support and customer service are a telephone call away. Our engineers are always available to assist our customers in the use of our products, or in interconnection or load interface issues.
- DEI offers modified versions of the PVX pulsers providing up to 12kV pulsed output voltage, and up to 1kW RMS power. Contact DEI for additional information.
Online Pulse Generator Product Data Sheets
PVX And PVM Series Pulse Generator Specifications