Pulse Generators

Generates simulated detector pulses for system testing and calibration Essential for setup, troubleshooting, and performance validation in spectroscopy systems Mimics real signals from:

• Semiconductor detectors (HPGe, Si)

• Scintillation detectors (NaI, PMT-based systems)

Adjustable parameters:

• Pulse amplitude (energy simulation)

• Rise time (detector response simulation)

• Pulse repetition rate

Wide dynamic range with attenuation up to 1000:1–2000:1 High stability against temperature and line voltage variations Supports charge or voltage output modes for flexible testing Compatible with full signal chain:

• Preamplifiers

• Amplifiers

• Discriminators

• MCA systems

Pulse generators are specialized electronic instruments used in radiation detection systems to simulate detector output signals, enabling accurate system setup, calibration, and diagnostics. Instead of relying on real radioactive sources, pulse generators produce controlled electrical pulses that replicate the signals generated by radiation interactions. This allows users to: Verify system performance Test electronics' functionality. Measure noise and resolution Calibrate energy response without radiation sources ORTEC provides two primary models tailored to different use cases: 🔹 Model 419 Precision Pulse Generator A high-performance solution with advanced control over pulse characteristics: Adjustable rise time (5–250 ns) Calibrated pulse amplitude corresponding to equivalent energy deposition Internal or external reference voltage Pulse rates from line frequency or ~70 Hz 🔹 Model 480 Pulser A simple and reliable tool for basic setup and troubleshooting: Fast rise time (<10 ns) Wide output range (up to 10 V) Stable operation with easy front-panel control Ideal for routine system checks Both models support charge output (via terminator) for compatibility with charge-sensitive preamplifiers, making them ideal for testing full spectroscopy chains.

Product Type: Pulse Generator / Signal Simulator (NIM module) Function:

• Simulated detector pulse generation

• System calibration and diagnostics

Pulse Shape:

• Exponential waveform

• Adjustable rise time (~5 ns to 250 ns)

Decay time constant: 200 µs or 400 µs Output Amplitude: Adjustable (0 to ±1 V typical; up to 10 V with external reference) Attenuation Range:

• Up to 1000:1 (Model 480)

• Up to 2000:1 (Model 419)

Pulse Repetition Rate: Line frequency or ~70 Hz internal oscillator Output Types:

• Direct voltage output

• Attenuated output

• Charge output (via terminator)

Stability: High stability vs temperature and power fluctuations Polarity: Selectable positive / negative output Form Factor: NIM-standard modules

• System calibration without radioactive sources

• Spectroscopy system setup and verification

• Noise analysis and resolution testing

• Detector and electronics troubleshooting

• Signal chain validation (preamp → amplifier → MCA)

• Laboratory and educational training systems

• Quality control in nuclear instrumentation