Pressure measurements within optical cells using diamond sensors: accuracy of the method below 1GPa

Research areas:

• Intérieurs planétaires (2011 - 2016)

Year:

2005

Authors:

• Olivier Grasset
• E Amiguet
• M Choukroun

Journal:

HIGH PRESSURE RESEARCH

Volume:

25

Number:

4

Pages:

255-265

Month:

December

ISSN:

0895-7959

BibTex:

@article{WOS:000234747700004, author = "Olivier Grasset and E Amiguet and M Choukroun", abstract = "The accuracy of the diamond pressure gauge has been investigated in the moderate pressure range (0-1 GPa) between 210 and 310 K. Experiments have been conducted using a sapphire anvil cell coupled to a Raman spectrometer. The temperature shift of the first-order Raman peak of diamond is very small (-7.56 x 10(-4) cm(-1)/K-1.5), which confirms previous results obtained on a wider temperature range. Such a trend implies a very small shift over the studied temperature range, of the same order than the dispersion due to external factors (isotopic composition, orientation). The pressure dependence is found equal to 3.20 (+/- 0.02) cm(-1)/GPa. A statistical description of the data is provided. indicating that the diamond gauge provides pressure estimates below 1 GPa with an accuracy of 39 MPa. Application of these results to science fields involved in the moderate pressure range below 1 GPa is discussed.", doi = "10.1080/08957950500466018", extra = "PICL", issn = "0895-7959", journal = "HIGH PRESSURE RESEARCH", month = "DEC", number = "4", pages = "255-265", title = "{P}ressure measurements within optical cells using diamond sensors: accuracy of the method below 1{GP}a", volume = "25", year = "2005", }

Abstract:

The accuracy of the diamond pressure gauge has been investigated in the
moderate pressure range (0-1 GPa) between 210 and 310 K. Experiments
have been conducted using a sapphire anvil cell coupled to a Raman
spectrometer. The temperature shift of the first-order Raman peak of
diamond is very small (-7.56 x 10(-4) cm(-1)/K-1.5), which confirms
previous results obtained on a wider temperature range. Such a trend
implies a very small shift over the studied temperature range, of the
same order than the dispersion due to external factors (isotopic
composition, orientation). The pressure dependence is found equal to
3.20 (+/- 0.02) cm(-1)/GPa. A statistical description of the data is
provided. indicating that the diamond gauge provides pressure estimates
below 1 GPa with an accuracy of 39 MPa. Application of these results to
science fields involved in the moderate pressure range below 1 GPa is
discussed.