Barpa is a low-noise fast-rise-time preamplifier especially designed for fast-timing applications such as photomultipliers, electron multipliers and other detectors employed in photon counting or ion counting.
When connected to the detector, the 50 ohm input resistance provides a load resistance for the detector output current pulse.
Thanks to its compact size and lightness, Barpa can be installed directly on the detector. Consequently, low-level signals, which would otherwise be susceptible to pickup of noise or interference, are boosted to a suitable level for cable connection to the main amplifier.
Input impedance : 50 ohm.
Input connector : Front-panel BNC.
Input RMS noise equivalent : about 30uV.
Voltage gain : 11, non inverting.
Output impedance : 50 ohm.
Output connector : Rear-panel BNC.
Power required : +/-12V, 10mA.
Dimensions : 51 x 51 x 31 mm (about 2 x 2 x 1,2 inch) (connectors excluded).