Absolute Calibration of Pressure

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Absolute Calibration of Pressure

• Dead Weight PF/a
• Shock waves Vs (DP/DV)1/2
• Acoustic velocity Vf (K/r)1/2
• Vf2 Vp2 - 4/3Vs2
• K -(V)?P/?V
• P - ? K dlnV

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High Pressure x-ray Studies
Details of SAM 85
Cell assembly for ultrasonic measurement
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Sample-(Mg0.83,Fe0.17)O
Kung, 2003
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Beware

• Stress
• P DsK/m
• Plastic flow (ultrasonic) length change
• Kung ratio, KR length/d(hkl)
• Measure length changes to 10-4 and d to 10-4

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