Method and apparatus for measuring air ion concentrations

Details Method and apparatus for measuring air ion concentrations Method and apparatus for measuring air ion concentrations

1982-04-16

1984-05-29

Howell, Janice A.

Radiant energy

Invisible radiant energy responsive electric signalling

Including a radiant energy responsive gas discharge device

2503361, G01T 118

Patent

active

044517360

ABSTRACT:
An air ion dosimeter is disclosed which includes a small electret (10) charged to a selected level and then enclosed to await use. Measurement of air ions is made by removing the enclosure (12) from the electret (10), and either exposing the electret to the ambient atmosphere for a specific time period or drawing a specific volume of air past it. After the exposure has been made the enclosure (12) is replaced on the electret (10). The charge remaining on the electret is measured at a convenient later time. The difference between the initial charge on the electret and the charge remaining after exposure is proportional to the relative air ion concentration at the location at which the electret was exposed.

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Cameron et al., "A Cylindrical Electret Ionization Chamber."
Cameron et al., "A Cylindrical Electret Ionization Chamber," Abstract of Paper presented at 6th Intern. Conf. on Solid State Dosimetry, Toulouse, France, Apr. 1-4, 1980.
Product Description, DEV Industries, Inc. "Ion Counter and Mobility Discriminator Model," Beckett, Serial No. 566.

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