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 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
For Fission Chambers and Proton Recoil detectors Models
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.
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.
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.
