A Rayleigh-Brillouin scattering spectrometer for ultraviolet wavelengths
Abstract
A spectrometer for the measurement of spontaneous Rayleigh-Brillouin scattering line profiles at ultraviolet wavelengths from gas phase molecules has been developed, employing a high-power frequency-stabilized UV laser with narrow bandwidth (2 MHz). The UV light from a frequency-doubled titanium:sapphire laser is further amplified in an enhancement cavity, delivering a 5 Watt UV-beam propagating through the interaction region inside a scattering cell. The design of the RB-scattering cell allows for measurements at gas pressures in the range 0-4 bar and at stably controlled temperatures from -30 to 70 degree Celsius. A scannable Fabry-Perot analyzer with instrument resolution of 232 MHz probes the Rayleigh-Brillouin profiles. Measurements on N2 and SF6 gases demonstrate the high signal-to-noise ratio achievable with the instrument, at the 1% level at the peak amplitude of the scattering profile.
Keywords
Cite
@article{arxiv.1210.1698,
title = {A Rayleigh-Brillouin scattering spectrometer for ultraviolet wavelengths},
author = {Ziyu Gu and M. Ofelia Vieitez and Eric-Jan van Duijn and Wim Ubachs},
journal= {arXiv preprint arXiv:1210.1698},
year = {2012}
}
Comments
8 double column pages, 9 figures