Quartz gauge

IMPACTOR FACING MATERIAL THIN FLIER QUARTZ GAUGE... 

The development of devices that provide a direct measure of stress or particle velocity led to observations of new rate-dependent mechanical responses and showed the power of such time-resolved measurements. The quartz gauge was the first of these devices with nanosecond time resolution, but its upper operating limit of 4 GPa limited its application. The development of the VISAR has had the most substantial impact on capabilities. VISAR systems, with time-resolution approaching 1 ns and the ability to work to pressures of 100 GPa, provide capabilities that have substantially altered the scientific descriptions of shock-compressed matter. 

Fig. 5.11. The study of shock compressibility of pressure-sensitive magnetic alloys was carried out with the quartz gauge impact technique. Loading was either with the specimen material or a quartz gauge. Resulting stress pulses were recorded with a quartz gauge (after Graham et al. [67G01]).

Fig 22 Typical Impact-Face Pressure Histories Measured with Quartz Gauges... 

The sensitivity of dextrinated and PVA lead azides to shocks of short duration (about 0.1 psec) was determined by impacting samples with a thin plate, observing the impact with a fast-framing camera, and measuring the transmitted stresses with a quartz gauge [46] (Figure 26). 

Figure 9-19. Schematic of an RF plasma system for plasma polymerization (polymer film deposition) (1) RF generator, (2) plasma zone (3) heated window (4) engine (5) rotating substrates (6) flexible connection (7) air valve (8) vacuum valve (9) manometer, (10) cooled trap (11) vacuum pump (12) quartz gauge for measurements of the film thickness (13) photodiode (14) registration system (15) polymer deposition chamber (16) laser (17) argon tank (18) valve (19) dose valve (20) tank with a manometer, (21) manometer.

J. E. Kennedy, Quartz Gauge Study of Upstream Reaction in a Shocked Explosive , Fifth International Symposium on Detonation, ACR-184, 435 (1970). 

Ultrasonic devices are used to measure mechanical damping and elastic moduli up to the medium frequency range, ie, > 1 MHz. A rod specimen is tightly connected with a quartz driver crystal and a quartz gauge crystal the crystals generate and detect longitudinal and shear waves (59,60). 

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