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Digital Multichannel Analyzer

The HA4100 is an integrated, cabinet-style low-background counting system utilizing dual-scintillator detectors. Available in 1, 2, 4, 6, 8, and 10-channel configurations, each detection channel operates independently while allowing simultaneous measurement. It is designed for total alpha and beta activity concentration analysis in water, biological, environmental, and aerosol samples.
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Product Overview

The HA-MCA-J is a standalone, single-channel digital MCA supporting up to 32K channels. It is compatible with a wide range of detectors, including HPGe, NaI(Tl), and LaBr₃. The system integrates multiple functional modules: automatic pole-zero cancellation, high-performance ADC, digital baseline restoration, and signal polarity adjustment. All parameters are fully configurable via the included PC software.

 

Features

  • High Conversion Gain:​ Maximum ADC conversion gain of up to 32K channels.
  • Gate/Delay Input:​ Integrated digital gate/delay ports for constructing digital anti-Compton and anti-cosmic shielding systems.
  • Automated Calibration:​ Automatic pole-zero adjustment, baseline restoration, and system optimization.
  • Dual-Polarity HV:​ Built-in programmable high-voltage supply: +500 V to +5000 V and -500 V to -5000 V.
  • Versatile Connectivity:​ USB 2.0 and Ethernet (TCP/IP) interfaces for data acquisition and control.
  • Automatic Stabilization:​ Embedded automatic peak stabilization (stabilizer) function.
  • Low Maintenance:​ Dual-scintillator detectors are resistant to surface contamination and require no consumables, ensuring a long service life.
  • Superior Anti-coincidence:​ Anti-coincidence shielding efficiency > 99.9%, drastically reducing background counts.
  • Precision Control:​ High voltage and discriminator thresholds are software-programmable, ensuring high setting accuracy.
  • Automated Decay Correction:​ Automatically corrects activity for working and certified reference sources based on half-life.

 

Technical Specifications

Product Model

HA-MCA-J

MCA Channels

128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768

Shaping Time

Rise Time: 0.8 μs ~ 24 μs

Flat-top Time: 0.1 μs ~ 2.4 μs

Linearity

Integral Non-linearity (INL) ±0.02%

Differential Non-linearity (DNL) ±0.8%

Maximum Count Rate

100 kcps

Long-Term Stability

Zero drift < 1 channel over 72 h

Gain instability < 0.2% over 72 h

Temperature Coefficient

Zero drift: < 0.2 ch/°C

Gain drift: < 0.1 %/°C

Communication Interface

USB 2.0, Ethernet (LAN)

Programmable HV

Dual-polarity: +500 V ~ +5000 V, -500 V ~ -5000 V

Power Requirements

+12 V DC, Power Consumption < 6 W

Dimensions

220 mm (L) × 220 mm (W) × 60 mm (H)

Weight

< 3 kg