Convenient optical pressure gauge for multimegabar pressures calibrated to 300GPa

• Published in: Applied physics letters Vol. 86; no. 1
• Main Authors: Sun, Liling, Ruoff, Arthur L., Stupian, Gary
• Format: Journal Article
• Language: English
• Published: 03-01-2005
• ISSN: 0003-6951; 1077-3118
• DOI: 10.1063/1.1840117

The accurate measurement of pressure by a straightforward and inexpensive optical procedure has been needed in the multimegabar region since static pressures over 216GPa, 361GPa, 420GPa and 560GPa were obtained in the diamond anvil cell. Here, a simple optical pressure gauge based on the Raman shift of the diamond at the center of a diamond tip at the diamond–sample interface is calibrated against a primary gauge (Pt isotherm at 300K from shock data) to 300GPa, thus enabling researchers who do not have a synchrotron to conveniently measure pressure with an optical scale from 50to300GPa.