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Electronics for Fission Chambers / Proton Recoil

For Fission Chambers and Proton Recoil detectors

A1427 Preamplifier characteristics

  • Fast non inverting preamplifier, negative output (EOUT)
  • Input impedance: 50 Ω AC coupled
  • Output high impedance (EOUT)
  • Bipolar output high impedance (FOUT)
  • Test input (TEST IN) impedance: 50 Ω, negative polarity
  • FOUT/DET IN gain (FOUT negative lobe):
    • FC version: 700÷2500
    • PR version: 500÷1500
  • FOUT/TEST IN gain: 1/100 of DET IN gain
  • Output noise (peak to peak) < 40 mV
  • Up to 3 kV detector bias voltage (HV IN)
  • Rbias: 200 kΩ

A1428 Discriminator characteristics:

  • Input polarity negative
  • Input impedance 50 Ω
  • Threshold -1 mV to -100 mV
  • Output: standard TTL signal
  • Maximum frequency 15 MHz for Fission Chamber
  • Maximum frequency 6 MHz for Proton Recoil

Overview

The A1427 KIT with A1427 Preamplifier is a fast and low noise current preampl. with AC coupled input. It is suitable for fission chambers detectors, boron deposition proportional counters, helium 3 counters and for proton recoil counters.
The A1428 is a leading-edge discriminator designed for negative pulses, with thresholds values into the range from -1 mV to -100 mV.
Both A1427 and A1428 units are developed by CEA Saclay for the Cabri reactor in Cadarache and it is suitable for fission chambers, boron deposition proportional counters, 3He counters and proton recoil counters. CAEN provides two versions of the kit: one for desk use and one made for the Cabri reactor. They’re available in two different versions for the use with fission chambers (A1427-8 CF) and for the use with proton recoil (A1427-8 PR).

A1427

Low noise fast current neutron flux preamplifier

A1427 is a fast and low noise current preamplifier with AC coupled input. It hosts two outputs: EOUT (unipolar) that can be integrated to calculate the energy associated to the input signal and FOUT (bipolar) that can be used to calculate the rate of the input signal, discriminating the negative pole using the A1428 discriminator that is specifically designed to fit with A1427. The discriminator thresholds is settable from -1 to -100 mV via a 10 turn rotary handle with lock. A1427 Kit configuration is also available, it includes the A1427 and the A1428 assembled together, both for fission chambers and for proton recoil detectors.

More info

A1427 Kit

Low noise fast current preamplifier and discriminator

A1427 Kit contains a fast preamplifier (A1427) and a discriminator (A1428) assembled together. A1427 is a fast and low noise current preamplifier with AC coupled input. The discriminator thresholds is settable from -1 to -100 mV via a 10 turn rotary handle with lock. The Kit is available in two different versions one for fission chambers (FC) the other for proton recoil detectors (PR). We provide A1427 and A1428 separately and in the A1427 Kit configuration, that includes the A1427 and the A1428 assembled together, both for fission chambers and for proton recoil detectors.

More info

A1428 

Discriminator for Low noise fast current neutron flux preamplifier

The A1428 is a leading-edge discriminator designed for negative pulses, with thresholds values into the range from -1 mV to -100 mV. It’s suited to work with A1427, a fast and low noise current preamplifier with AC coupled input which hosts two outputs to calculate the energy associated to the input signal and the rate. A1427 Kit configuration is also available, that includes the A1427 and the A1428 assembled together, both for fission chambers and for proton recoil detectors.

More info

Interfaces & I/O

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Software

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Request info

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Brochure

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