thimble ionization chamber


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thimble ionization chamber

[¦thim·bəl ‚i·ə·nə′zā·shən ‚chām·bər]
(nucleonics)
A small cylindrical or spherical ionization chamber, usually with walls made of organic material or air walls.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.