title: The acoustic nonlinearity parameter in Fluorinert up to 381 K and 13.8 MPa.
abstract: This work reports on the determination of the acoustic nonlinearity parameter, B/A, from measured sound speed data, in Fluorinert FC-43 at temperatures up to 381 K and pressures up to 13.8 MPa using the thermodynamic method. Sound speed was measured using Swept Frequency Acoustic Interferometry at 11 pressures between ambient and 13.8 MPa along 6 isotherms between ambient and 381 K. Second-order least-squares polynomial fits of measured sound speeds were used to determine temperature and pressure dependence. A room temperature B/A = 11.7 was determined and this parameter was found to increase by a factor of 2.5 over the temperature/pressure range investigated.
authors.affiliation: Materials Physics and Applications, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA bsturtev@lanl.gov, pantea@lanl.gov, sinha@lanl.gov.
authors.forename: Blake T
authors.initials: BT
authors.lastname: Sturtevant
authors.affiliation: Materials Physics and Applications, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA bsturtev@lanl.gov, pantea@lanl.gov, sinha@lanl.gov.
authors.forename: Cristian
authors.initials: C
authors.lastname: Pantea
authors.affiliation: Materials Physics and Applications, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA bsturtev@lanl.gov, pantea@lanl.gov, sinha@lanl.gov.
authors.forename: Dipen N
authors.initials: DN
authors.lastname: Sinha