Quantitative tradeoffs between spatial, temporal, and thermometric resolution of nonresonant Raman thermometry for dynamic experiments.

Appl Spectrosc

Shock and Detonation Physics Group, MS P952, Los Alamos National Laboratory, Los Alamos, NM 87545 USA.

Published: May 2015

The ratio of Stokes to anti-Stokes nonresonant spontaneous Raman can provide an in situ thermometer that is noncontact, independent of any material specific parameters or calibrations, can be multiplexed spatially with line imaging, and can be time resolved for dynamic measurements. However, spontaneous Raman cross sections are very small, and thermometric measurements are often limited by the amount of laser energy that can be applied without damaging the sample or changing its temperature appreciably. In this paper, we quantitatively detail the tradeoff space between spatial, temporal, and thermometric accuracy measurable with spontaneous Raman. Theoretical estimates are pinned to experimental measurements to form realistic expectations of the resolution tradeoffs appropriate to various experiments. We consider the effects of signal to noise, collection efficiency, laser heating, pulsed laser ablation, and blackbody emission as limiting factors, provide formulae to help choose optimal conditions and provide estimates relevant to planning experiments along with concrete examples for single-shot measurements.

Download full-text PDF

Source
http://dx.doi.org/10.1366/14-07503DOI Listing

Publication Analysis

Top Keywords

spontaneous raman
12
spatial temporal
8
temporal thermometric
8
quantitative tradeoffs
4
tradeoffs spatial
4
thermometric resolution
4
resolution nonresonant
4
raman
4
nonresonant raman
4
raman thermometry
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!