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R7771

New

Neutron Pulse Train Recorder

Features

  • Intended for neutron counting applications with multiple detectors
  • Dedicated to Nuclear Safeguards and nuclear material process monitoring in its life cycle
  • 10 ns time stamp resolution
  • 10 ns of pulse pair resolution and minimum pulse width detection
  • 32 inputs on BNC connectors (TTL, 1000 Ω)
  • High power high voltage supply output (+2000 V @1 mA)
  • High power low voltage supply output (+5 V @ 1.5 A)
  • 10/100T Ethernet and USB 2.0 interfaces
  • Provided with readout software, SDK tool and web interface
  • 19” rack form factor and suited for stand-alone use as well

Overview

The R7771 is a Neutron Pulse Train Recorder for the acquisition of signals from 32 neutron detectors. It provides the time-stamped list of TTL pulses from neutron detector front-end electronics with 10ns pulse pairs resolution independently per each channel. The R7771 provides the most complete information on neutron counting, giving the capability to characterize nuclear material in passive mode and to analyse the transients in active nuclear material interrogation. The 32 independent inputs allow for the acquisition from big volume assay systems composed by multiple neutron detectors.

It is provided in mechanics compliant to 19” racks and can operated also stand-alone. The R7771 can connect to external host computers by point‐to‐point direct connection through the USB 2.0 link and by a remote network connection through the Ethernet 10/100T port. The internal CPU manages the board settings, the acquisition and the data transfer of the pulse train from each channel of the board to the host PC. The computational resources and data throughput allow the acquisition of a high total continuous input rate (up to 3∙106 cps).

The device is equipped with high power outputs for multiple detector operation at once: HV output channel for the detector bias and LV output channel for powering the front-end electronics such as preamplifiers and discriminators.

The R7771 is fully supported by CAEN ShiftRegister control software which configures the device, handles the data acquisition and saves the recorded pulse trains to binary files on the host computer for offline analysis (supported PTR- 32 format compatible with the INCC software*). It also gives the possibility to import stored pulse trains and to execute coincidence and multiplicity analysis in post‐processing. Users can take advantage of the provided CAENSR library for custom development. Firmware upgrade, file management and other useful functions are available through the integrated Web Interface.

*INCC Software Users Manual: http://lib-www.lanl.gov/la-pubs/00326587.pdf

Technical Specifications

PHYSICAL
From Factor 

1.25U wide
compatible with 19” rack

Weight 

2650 g 

CONNECTORS
Input [1:32] 

32 signal inputs 

Single ended TTL (Zin = 1000 Ω) 

BNC socket 

Pulse width detected bigger than 10 ns 

HV 

High Voltage output 

SHV plug 

LV 

Low voltage output 

BNC jack receptacle 

USB 

USB2.0 communication port 

Type-B socket 

ETHERNET 

10/100T Ethernet port 

RJ45 shielded jack 

Power In 

100 ‐ 240 V AC power input 

PULSE PAIR RESOLUTION

10 ns

HVPS OUTPUT

Sigle channel for the detector power supply:
Output Bias Voltage (Vset) = 0 ÷ +2000 V DC
Output Bias Current (Iset) = 1 mA (max.)
Vset Resolution = 1 V
Vmon Resolution = 1 V
Imon Resolution = 1 μA
Ramp‐Up/Ramp‐Down = 1 ÷ 500 V/s in steps of 1V

LOW VOLTAGE OUTPUT

Single channel for the preamplifier power supply: +5 V @ 1.5 A (max.)

ON‐BOARD CPU

ARM Cortex‐A8 1 GHz (SDRAM Memory 512 MB DDR3L 800 MHz) running Linux Debian system

OPERATING MODES

Attended only

BUTTONS AND INDICATORS
  • Power (LED, green)
  • HV ON (LED, red)
  • Reset (button)
COMMUNICATION INTERFACES
Ethernet 

10/100 Mbps 

Compatible with IEEE 802.3u 100BASE-T standard 

Configuration, operation, and data taking 

USB 

Version 2.0 

Configuration, operation and data taking 

SOFTWARE
  • Windows® and Linux® support
  • Drivers for the communication links
  • SDK tool including CAENSR library and demo code for custom development
  • CAEN ShiftRegister control software
  • Compatibility with INCC software
  • Web Interface (Board information retrieval, files management, firmware upgrade)
POWER REQUIREMENTS

Integrated primary power supply unit 9-36V DC:
Voltage = 100 ‐ 240 V ∼
Frequency = 50/60 Hz
Current = 0.5 A RMS (max.)
FUSE = 2x T1A 6.3×32 250VAC

R7771

Neutron Pulse Train Recorder
Product page
R7771
  • Documentation
  • Software
  • Firmware

Manuals

Name File extension File size Revision Last update
Precautions for Handling Storage Installation (ENG/ITA) PDF 179.29 kB - April 10th, 2019

Changelog:  

Note:  
Requirements:  

License  
Download

Release Notes: 
Release_Notes.txt

Build:  

Ordering Options

Code Description
WR7771XAAAAA R7771 - 32 Channel Neutron Pulse Train Recorder   RoHS

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