93 citations · 184 across the 6 of their papers we have counts for
6 papers
Electro-optic frequency comb Doppler thermometry
Sean M. Bresler, Erin M. Adkins, Stephen P. Eckel +4
We demonstrate a Doppler thermometer based on direct optical frequency comb spectroscopy of an Rb vapor with a chirped electro-optic frequency comb (EOFC). The direct EOFC D…
Dual electro-optic frequency comb photonic thermometry
Adam J. Fleisher, Zeeshan Ahmed, Tobias Herman +1
We report a precision realization of photonic thermometry using dual-comb spectroscopy to interrogate a -phase-shifted fiber Bragg grating. We achieve read-out stability of 7.5…
Low Frequency Acoustic Resonance Studies of the Liquid-Vapor Transition in Silica Aerogel
Tobias Herman, John Beamish
Fluid phase transitions in porous media are a powerful probe of the effect of confinement and disorder on phase transitions. Aerogel may provide a model system in which to study th…
Deformation of Silica Aerogel During Fluid Adsorption
Tobias Herman, James Day, John Beamish
Aerogels are very compliant materials - even small stresses can lead to large deformations. In this paper we present measurements of the linear deformation of high porosity aerogel…
Freezing and pressure-driven flow of solid helium in Vycor
James Day, Tobias Herman, John Beamish
The recent torsional oscillator results of Kim and Chan suggest a supersolid phase transition in solid He-4 confined in Vycor. We have used a capacitive technique to directly monit…
Helium adsorption in silica aerogel near the liquid-vapor critical point
Tobias Herman, James Day, John Beamish
We have investigated the adsorption and desorption of helium near its liquid-vapor critical point in silica aerogels with porosities between 95% and 98%. We used a capacitive measu…