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0 to 鹵3000V Pulse Output
<25ns Rise And Fall Times
<60ns to DC Pulse Width
>25KHz Pulse Repetition Frequency
Optimized To Drive Deflection
Plates, Grids, Pockels Cells And
Other Capacitive Loads
Protected Against Arcs, Shorts And
Load Transients
Voltage And Current Monitor
Outputs
Economical, Modular Solid State
Design
The PVM-4140 is a compact, OEM-style pulse generator
module producing fast, high voltage wave forms to
3,000V. Optimized for high impedance capacitive loads,
the PVM-4140 is well suited for driving extraction grids
and deflection plates for electrostatic modulation of parti-
cle beams in time-of-flight mass spectrometers and accel-
erators. Its robust and versatile design also makes it well
suited for pulsing or gating power tube grids, Pockels cells
and Q Switches, acoustic transducers, microchannel
plates, photomultiplier tubes and image intensifiers. The
exceptional pulse fidelity of the PVM-4140 will optimize the
performance of any system in which it is used.
The PVM-4140 generates an output voltage pulse of 3,000
volts with rise and fall times less than 25ns, with very flat
voltage pulses to DC into a capacitive load. It can gener-
ate singled-ended output pulses from ground to +3000V or
from ground to 鈥?000V, and can also generate pulses
originating from a DC voltage offset from ground by using
both VLow and VHigh power supply inputs.
The PVM-4140 requires user-supplied +24VDC to
+28VDC support power, a TTL gate signal, a high voltage
DC power supply and optional DC offset supply inputs.
The output pulse width and frequency are controlled by
the gate signal. The pulse output voltage is controlled by
the amplitude of the input DC power supplies.
Scaled internal voltage and current monitors provide a
straightforward means to view the output voltage and cur-
rent waveforms in real-time.
The pulser is a half-bridge (totem pole) design, offering
equally fast pulse rise and fall times, low power dissipa-
tion, and virtually no over-shoot, under-shoot or ringing.
The PVM-4140 has over-current detection and shut-down
circuitry to protect the pulse generator from potential dam-
age due to arcs and shorts in the load or interconnect ca-
ble.
Unlike some competing solid state switches, the PVM-4140 in-
corporates all control and protection logic circuitry, energy stor-
age and output network. It can be connected directly to the
load, and does not require series or shunt resistors, impedance-
matching networks between the pulser and the load, or addi-
tional energy storage (capacitor banks). All of this is taken care
of within the PVM-4140. The pulser is housed in an aluminum
enclosure, with threaded mounting holes in the base to simplify
installation and assembly in OEM applications.
The PVM-4140 pulser is a direct-coupled, all solid-state de-
sign using air as the primary insulating medium. Its conser-
vative design margin gives you long component life. And
keeping the PVM-4140 free of potting compound or encap-
sulation materials makes it easy to service if a component
ever does require replacement. Some competing products
are potted, and must be replaced if they fail. But compact-
ness and durability are not all you get in the PVM-4140. In-
herent in the design is exceptional pulse fidelity with virtu-
ally no ringing, over-shoot or under-shoot, high average
power handling capability, and protection against arcs,
shorts and load transients in a reliable, economical module.
DIRECTED
ENERGY
INCORPORATED
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