Heatable cell for photoacoustic tests

Details Heatable cell for photoacoustic tests Heatable cell for photoacoustic tests

1981-03-20

1983-10-11

Kreitman, Stephen A.

Measuring and testing

Gas analysis

By vibration

G01N 2100

Patent

active

044084781

ABSTRACT:
A heatable cell for photoacoustic tests. The cell includes a specimen chamber which is connected with the microphone chamber of a detector microphone, and is provided with a specimen receiving portion and light admission window located across therefrom. A recess is located in the chamber closure and serves as the specimen receiving portion. The sealing surface of the chamber closure is sealingly pressed against a sealing surface of the chamber. At least one heating winding is provided on the chamber and/or on the chamber closure, and a thin-wall connecting tube having poor heat conducting characteristics is provided between the specimen chamber and the microphone chamber, which is arranged lower than the specimen chamber to prevent convection.

REFERENCES:
patent: 4028932 (1977-06-01), Rosencwaig
Zharov et al., "Optoacoustic Laser Spectroscopy of Excited Vibrational Moular States", Applied Physics, pp. 15-17, 1977.

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