Noun | 1. | particle detector - a chamber in which particles can be made visible bubble chamber - an instrument that records the tracks of ionizing particles chamber - a natural or artificial enclosed space cloud chamber, Wilson cloud chamber - apparatus that detects the path of high-energy particles passing through a supersaturated vapor; each particle ionizes molecules along its path and small droplets condense on them to produce a visible track spark chamber, spark counter - an instrument that detects ionizing radiation from elementary particles |