title: In situ pressure calibration for piston cylinder cells via ruby fluorescence with fiber optics.
abstract: A fiber-optic measurement technique is developed for estimating the pressure inside a piston cylinder cell up to approximately 4 GPa, based on the pressure-induced R1 fluorescence line shift of ruby (ruby scale). Ruby scale and a conventional technique (calibration on phase transitions of bismuth) were simultaneously applied to the cell filled with a pressure transmitting medium of isopropyl alcohol. The pressure readings of the two methods were consistent with each other, and no pressure gradient was observed. The ruby scale has the advantages of real time estimation and easy installation in a small space. Because of these advantages, three fibers were simultaneously introduced in the sample space at the same time, and pressure distribution was measured for Fluorinert (FC70:FC77=1:1), Daphne oil 7373, and Fomblin oil (YHVAC 13014).
authors.affiliation: Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan. nakazuko@issp.u-tokyo.ac.jp
authors.forename: Kazuko
authors.initials: K
authors.lastname: Koyama-Nakazawa
authors.forename: Masahito
authors.initials: M
authors.lastname: Koeda
authors.forename: Masato
authors.initials: M
authors.lastname: Hedo
authors.forename: Yoshiya
authors.initials: Y
authors.lastname: Uwatoko
mesh_terms: D002138:Calibration; D002681:China; D004867:Equipment Design; D019544:Equipment Failure Analysis / Q000295:instrumentation* / Q000592:standards; D005336:Fiber Optic Technology / Q000295:instrumentation*; D007834:Lasers; D008365:Manometry / Q000295:instrumentation* / Q000592:standards; D055100:Optical Fibers; D011312:Pressure; D012016:Reference Values; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013048:Specimen Handling / Q000295:instrumentation* / Q000592:standards; D013050:Spectrometry, Fluorescence / Q000295:instrumentation* / Q000592:standards