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Fast, low noise inverting preamplifier specifically designed for Scintillation Detectors
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Variable sensitivity from 0.8 to 10 mV/pC
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Fast output for timing measurements
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Test input for calibration
The CAEN Mod.A1424 is a preamplifier specifically designed for Scintillation Detectors widely used in Nuclear and High Energy Physics where low noise, fast response and high counting rates are required.
The A1424 relies on an inverting Charge Sensitive Preamplifier which integrates both positive and negative input charge pulses coming from the Photodetector (e.g. PMT) coupled to the Scintillator.
It provides a voltage signal in the ±4 V range on 50 Ω termination (±8 V on 1 kΩ) with exponential decay (t= 50 µs) as Energy output (ENERGY). The height of the resulting pulse is proportional to the integrated charge. The sensitivity of the Charge Sensitive Preamplifier can be set via a 10 position rotary switch ranging from 0.8 to 10 mV/pC.
The A1424 is provided with a non-inverting buffer (gain ~ 1) which reproduces the input signals coming from the detector as fast output being useful for timing measurements (FAST). Moreover, a test input accepts positive and negative signals for calibration purposes (TEST).
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Compare
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Image
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Name
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FORM FACTOR
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NO. OF CHANNELS
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DESCRIPTION
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SENSITIVITY
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COMPATIBLE DETECTORS
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A1422H |
Single in-line package |
1 |
Low Noise Fast Rise Time Charge Sensitive Preamplifiers (SIP) |
1/5/45/90/400/450<br>mV/MeV (Si) |
Silicon (Si) |
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A1424 |
Desktop |
1 |
Fast Charge Sensitive Preamplifier |
3.6 mV/fC |
Diamond |
|
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A1422C/D |
Desktop |
8 |
Low Noise Fast Rise Time Charge Sensitive Preamplifier |
5 (mV/MeV) (Si) |
He3 / BF3 Tubes |
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A1422 |
Desktop |
1 / 4 / 8 |
Low Noise Fast Rise Time Charge Sensitive Preamplifiers |
1/5/45/90/400/450<br>mV/MeV (Si) |
He3 / BF3 Tubes<br>Proportional Counters<br>Ionization Chambers<br>Segmented Silicon <br>Silicon (Si) |
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A1429 |
Desktop |
64 |
Charge Sensitive Preamplifier |
20/45/90/200/400<br>mV/MeV (Si) |
GEM Segmented Silicon |
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A1427 |
Desktop |
1 |
Low Noise Fast Current Neutron Flux Preamplifier |
FC: 700÷2500<br>(Trimmer adjustable)<br>PR: 500÷1500<br>(Trimmer adjustable) |
Fission Chambers<br>Proton Recoil |
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A1422E/F |
Desktop |
2 / 4 |
Low Noise Fast Rise Time Charge Sensitive Preamplifiers |
200 mV/MeV (Si) |
Silicon (Si) |
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A1442 |
Desktop |
16 / 32 |
Charge Sensitive Preamplifier |
Selectable 20/100<br>mV/MeV (Si) |
GEM Segmented Silicon |
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New A1421 |
Desktop |
1 |
Preamplifier and Discriminator for 3He tubes |
30 mV/fC on HiZ<br>(15 mV/fC on 50 Ω) |
He3 / BF3 Tubes |
|
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R1443 |
19” rack unit |
32 / 64 |
Preamplifier Unit for 3He tubes |
2.25 V/pC |
He3 / BF3 Tubes |
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A1423B |
Desktop |
1 |
Wideband Preamplifier |
Selectable From<br>+18 dB to +54 dB |
Diamond PMT<br>Scintillators<br>SiPM / MPPC |
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A1426 CARDARELLI |
Desktop |
1 |
Matched Charge Preamplifier |
Up to 5 mV/fC |
Diamond |
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A1436 / A1436A |
Desktop |
1 / 8 |
Differential Input Low Noise Transimpedance Amplifiers |
Programmable<br>10<sup>9</sup>/10<sup>8</sup>/10<sup>7</sup>/10<sup>6</sup>/10<sup>5</sup>/10<sup>4</sup>/10<sup>3</sup><br>(V/A), 10<sup>9</sup> V/A (A1436 only) |
Diamond PMT / Scintillators<br>Silicon (Si) |
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A1425 |
Desktop |
1 |
Fast Charge Sensitive Preamplifier |
3.6 mV/fC |
Diamond |
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A422A |
Desktop |
1 |
Charge Sensitive Preamplifier with Timing |
5/30/60 mV/MeV (Si) |
Proportional Counters<br>Ionization Chambers<br>Silicon (Si) |
Technical Specifications
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Packaging |
Shielded Box
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No. of Channels |
1 |
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INPUT SENSITIVITIES |
0.8, 0.9, 1.1, 1.3, 1.5, 1.7, 2.5, 3, 5, 10 mV/pC selectable via Rotary Switch |
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RISE TIME |
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FALL TIME |
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Integral Nonlinearity |
Energy Out: < ± 0.02% |
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Temperature Coefficient |
±0.01% /C° |
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NOISE (Energy Out) |
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Counting Rate |
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INPUT (Detector IN) |
Accepts positive and negative input charge pulses from Scintillation detectors. Maximum Input Voltage: ±4 V, input impedance: 50 Ω, LEMO-00 connector. |
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INPUT (Test) |
Positive or negative inputs for the energy calibration via Ctest = 100 pF; LEMO-00 connector. |
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OUTPUT (Energy) |
± 8V (on 1 kΩ), 50 Ω back termination. The output voltage is proportional to the amount of input charge, LEMO-00 connector |
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OUTPUT (Fast) |
Reproduces the input signals (gain ~ 1) coming from the detector as fast output for timing measurements. 50 Ω back termination, LEMO-00 connector. |
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Power Requirements |
15mA @ +12V; 15mA @ -12V |
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