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.

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Technical Specifications

Input impedance: 50 ohm.

Input connector: Front-panel BNC.

Input RMS noise equivalent: about 10uV.

Voltage gain: 10, non inverting.

Output impedance: 50 ohm.

Output connector: Rear-panel BNC.

Power required: +/-12V, 10mA.

Dimensions: 60 x 55 x 30 mm (about 2,4 x 2,2 x 1,8 inch) (connectors excluded).