projection spark chamber

projection spark chamber

[prə′jek·shən ′spärk ‚chām·bər]
(nucleonics)
A spark chamber in which the track of the particle is perpendicular, or nearly so, to the electric field, so that each electron of the track produces a streamer across the gap; the resulting curtain contains information only as to the projection of the track perpendicular to the electric field. Also known as projection chamber.
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