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Oscillations, Waves, and Interactions - GWDG

Oscillations, Waves, and Interactions - GWDG

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372 U. Kaatze <strong>and</strong> R. Behrends<br />

Figure 3. Cross section of a plano-concave resonator cell [37]. 1, sample volume; 2, planar<br />

circular piezoelectric transducer crystal with coaxially evaporated films of chrome <strong>and</strong> gold<br />

constituting the electrodes; 3, transducer disc as 2 but concavely shaped with radius of<br />

curvature =2 m; 4, layer of silicone rubber with embedded bronze strips providing electrical<br />

contact between the transducer front <strong>and</strong> the holding frame; 5, crystal setting; 6, spring<br />

contact; 7, cell jacket with 8, channel for circulating thermostat fluid; 9, inlet <strong>and</strong> 10,<br />

outlet for the sample liquid; 11, sealing O-ring; 12, base plate; 13, main frame fixed with<br />

respect to 12; 14, adjustable frame with 15, ball joint; 16, precisely adjustable screw with<br />

17, counteracting spring; 18, movable frame fixed against radial dispacements <strong>and</strong> tilting<br />

by 19, ball-bush guides; 20, gauge block establishing the distance between 13 <strong>and</strong> 18; 21,<br />

locking device; 22 <strong>and</strong> 23, thermostatic channels; 24, thermostatic shield.

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