Nuclear electronics, special methods present: Diagram of nuclear spectrometers, Processing of electronic signals, Basic elements of electronic signal processing, Basic elements of electronic signal processing, Pole-zero cancellation, The baseline shift, Pile-up effect, Linear amplifier, Quality control of a nuclear laboratory,.invite you to consult the documentation | Diagram of nuclear spectrometers HUVINETT 2012 Low-voltage power supply Pulser Nuclear electronics, special methods Detector Preamplifier Amplifier MCA Nuclear measuring methods High-voltage power supply 8th lecture Dr. Imre Szalóki NIM = Nuclear Instrument Module associate professor Head of Department of Nuclear Energetics Power supply: 6,12,24 V Budapest University of Technology and Economics Institute of Nuclear Techniques (BME NTI) Modular design Standard units: amplifier, pulser, high-voltage power supply, Nuclear measuring methods/ 1. lecture Dr. Imre Szalóki., BME NTI 1 Nuclear measuring methods/ 1. lecture 2 Basic elements of electronic signal processing Processing of electronic signals Differentiator circuit Signal/noise optimization Dr. Imre Szalóki., BME NTI Integrator circuit Combined CR-RC circuit Output signal of the preamplifier Charge collecting ≈ 50 µs Signal conditioning: High-pass filter RC, CR filter Low-pass filter Band-pass filter Time-constant Ideal shape of the signal Cable impedance Ground loop distortion of form of pulses Reflection Nuclear measuring methods/ 1. lecture U out = τ 1 Dr. Imre Szalóki., BME NTI 3 dU in dt Nuclear measuring methods/ 1. lecture U out = 1 τ2 ∫U in dt Dr. Imre Szalóki., BME NTI U out = U inτ 1 −t τ 1 e − e −t τ 2 τ1 −τ 2 ( ) 4 Basic elements of electronic signal processing Pole-zero cancellation Signal shape after amplifier output: Different shape of signal Ideal shape of signal Real shape of signal U(t) U(t) U(t) Input of the main amplifier t Pre-amplifier Output of the main amplifier without P/Z finite decay Transient effects Pole-zero setting Shaping of signal (pulse) Decay of preamplifier ≈ 50 µs Semi-Gauss shape: single differentiation + multiply integration ideal for HPGe gamma spectroscopy U(t) n t −t τ U out = U (t ) e τ Trapezoidal waveform: decreasing the pile-up, worse signal/noise rate Triangular shaping Nuclear measuring .
