| NOUN | artifact | Wilson cloud chamber, cloud chamber | apparatus that detects the path of high-energy particles passing through a supersaturated vapor |
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| Meaning | apparatus that detects the path of high-energy particles passing through a supersaturated vapor; each particle ionizes / ionizes molecules along its path and small droplets condense on them to produce a visible track. | |
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| Synonym | cloud chamber | |
| Broader | particle detector | A chamber in which particles can be made visible |