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Pulse Shape and Signal Processing for Neutron and Gamma Energy Sources

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Presentation on theme: "Pulse Shape and Signal Processing for Neutron and Gamma Energy Sources"— Presentation transcript:

1 Pulse Shape and Signal Processing for Neutron and Gamma Energy Sources
Nathan Barba Mentor: Dr. Craig Hardgrove Arizona State University Mechanical Engineering Pulse Shape and Signal Processing for Neutron and Gamma Energy Sources

2 Neutron Spectroscopy Using CLYC
Cs2LiYCl6:Ce (CLYC) is an inorganic scintillator that has dual sensitivity to neutron and gamma rays.  Scintillation detectors produce light when exposed radiation.  The light generated is converted to electrical energy using a photomultiplier tube (PMT).  The waveform signals that are output from the PMT are called pulses.  The signal from the pulses can be pre-processed using analog and/or digital electronics.  Source: Spieler, H., Front-End Electronics and Signal Processing

3 Applications Radioactive Material Detection Quantitative Analysis
Soil composition Oil and Gas Hydrogen Detection Space applications Source: Amptek

4 Space Based Neutron Detectors
LunaH-Map MiniNS Detector Mars Science Laboratory (Curiosity) Dynamic Albedo of Neutrons (DAN) DAWN Mission Gamma Ray and Neutron Detector (GRaND) MiniNS Source: Hardgrove Labs DAN Instrument Source: ROSCOSMOS

5 CLYC Laboratory Setup Hardgrove Lab Analog Electronics Digital FGPA
Source: Potassium Holbert Lab Analog Electronics Digital FGPA Source: Cesium

6 Signal Processing Hardware
Analog Charge Sensitive Preamplifier Gaussian Shaper Analog/Digital Converter (MCA) Outputs: Histogram Digital Analog/Digital Converter (MCA) FPGA and Software Processing Outputs: Raw Waveform Integrals Histogram Pulse Shape Discrimination

7 Neutron Pulse Processing Software
Raw Waveform Convert to Integrals Generate Histogram

8 Pulse Processing Results
3600 sec experiment control versus potassium chloride salt pellets Green: Potassium (K-40) Red: Background radiation

9 Acknowledgements Thank you to: Dr. Craig Hardgrove Dr. Tom Sharp and Desiree Crawl Arizona Space Grant Consortium NASA Erik Johnson - Radiation Monitoring Devices (RMD) Dr. Keith Holbert - ASU

10 Questions?? nathan.barba@asu.edu
Thank you! Questions??

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