I believe instruments merit a separate thread.
Building low cost instruments for LENR investigations.
Cloud Chambers versus Geiger Counters versus Ionization Chambers versus Spark Detectors.
http://www.furryelephant.com/c…cting-ionizing-radiation/
http://www.furryelephant.com/c…ation-chamber-simulation/
Speaking of Spark Detectors: https://www.instructables.com/…-Particle-Spark-Detector/