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Title: Combined laser ultrasonics, laser heating, and Raman scattering in diamond anvil cell system

Here, we developed a multi-functional in situ measurement system under high pressure equipped with a laser ultrasonics (LU) system, Raman device, and laser heating system (LU-LH) in a diamond anvil cell (DAC). The system consists of four components: (1) a LU-DAC system (probe and pump lasers, photodetector, and oscilloscope) and DAC; (2) a fiber laser, which is designed to allow precise control of the total power in the range from 2 to 100 W by changing the diode current, for heating samples; (3) a spectrometer for measuring the temperature of the sample (using black body radiation), fluorescence spectrum (spectrum of the ruby for pressure measurement), and Raman scattering measurements inside a DAC under high pressure and high temperature (HPHT) conditions; and (4) an optical system to focus laser beams on the sample and image it in the DAC. The system is unique and allows us to do the following: (a) measure the shear and longitudinal velocities of non-transparent materials under HPHT; (b) measure temperature in a DAC under HPHT conditions using Planck’s law; (c) measure pressure in a DAC using a Raman signal; and (d) measure acoustical properties of small flat specimens removed from the DAC after HPHT treatment. Inmore » this report, we demonstrate that the LU-LH-DAC system allows measurements of velocities of the skimming waves in iron at 2580 K and 22 GPa.« less
Authors:
 [1] ;  [2] ; ORCiD logo [3] ;  [3] ;  [4] ;  [3]
  1. Univ. of Hawaii, Honolulu, HI (United States); Russian Academy of Sciences, Moscow (Russia)
  2. Univ. of Chicago, Chicago, IL (United States)
  3. Univ. of Hawaii, Honolulu, HI (United States)
  4. Univ. du Maine, Le Mans (France)
Publication Date:
Grant/Contract Number:
FG02-07ER46408; FG02-94ER14466; AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 87; Journal Issue: 12; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org:
USDOE Office of Science (SC); National Science Foundation (NSF)
Country of Publication:
United States
Language:
ENGLISH
Subject:
47 OTHER INSTRUMENTATION
OSTI Identifier:
1340710
Alternate Identifier(s):
OSTI ID: 1364072