Logo Caen


Coming Soon

Preamplifier Unit for He3 Tubes 


  • Specifically designed for neutron detectors as 3He or BF3 tubes.
  • 19” rack unit (height = 2U)
  • External HV input on SHV connector (feeding the internal decoupling circuits)
  • Detector inputs on SHV connectors
  • Test input on BNC (1 pF charge injection capacitors)
  • Differential outputs on RJ45 connectors
  • Three available versions:
    • 32 channels
    • 64 channels
    • 32 channels with 16 independent HV inputs (1 per tube)
  • Full position-sensitive 3He acquisition system in combination with R5560 digitizer


R1443 is a 32/64 channels Charge Sensitive Preamplifier in a 19ʺ rack unit (120/230 V 50/60 Hz AC Powered). It has been developed in collaboration with Institut Laue-Langevin in Grenoble, France, and it is specifically designed for operating with neutron detectors as 3He or BF3 tubes. Given the number of input channels, it can handle up to 16/32 position-sensitive tubes, each tube having two outputs, one for each end.
The output signal of each channel has an RC of 1 μs. This guarantees excellent performances even at high rates exceeding 100 kcps. The output of this preamplifier is typically readout by ADC and Digital Pulse Processing electronics in order to perform specific filtering to achieve the best charge, timing and axial position measurements.

Technical Specifications

Preamplifier Gain

2 V/pC

Total Gain

0.85 to 19 V/pC

Input Range

AC coupled, DC max = +/-50V

Input Charge Dynamics

-4 pC to +1 pC (@ Gain = 0.85 V/pC)

Rise Time

< 10ns @ Gain = 0.85 V/pC ~100ns @ gain = 19 V/pC

Decay Time

1.1 μs

Power dissipation

1.15W typ.

Output range

Differential Outputs (max ±2V) on 8 RJ45 connectors (4 pairs each)


HV Cables
High Voltage Cable Assemblies
Inhibit - Kill Signal BNC Adapter for HV Power Supply Modules

Ordering Options

Code Description
WR1443XAAAAA R1443A 32 channels Preamplifier unit for He3 tubes   RoHS
WR1443XBAAAA R1443B 64 channels Preamplifier unit for He3 tubes   RoHS
WR1443XCAAAA R1443C 32 channel Preamplifier unit for He3 tubes with independent HV  RoHS
WR1444XAAAAA R1444 Preamplifier for He3 tubes   RoHS


Great to have you back!