spark chamber
noun
: a device usually used to detect the path of a high-energy particle that consists of a series of charged metal plates or wires separated by a gas (such as neon) in which observable electric discharges follow the path of the particle
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“Spark chamber.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/spark%20chamber. Accessed 30 Oct. 2025.
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