A diagnostic to measure neutral-atom density in fusion-research plasmas. Academic Article

abstract

• A femtosecond two-photon-absorption laser-induced-fluorescence (TALIF) diagnostic was designed, installed, and operated on the Princeton-Field-Reversed Configuration-2 device to provide non-invasive measurements of the time and spatially resolved neutral-atom densities in its plasmas. Calibration of the Ho density was accomplished by comparison with Kr TALIF. Measurements on plasmas formed of either H2 or Kr fill gases allowed examination of nominally long and short ionization mean-free-path regimes. With multi-kW plasma heating and H2 fill gas, a spatially uniform Ho density of order 1017m-3 was measured with better than 2mm and 10s resolution. Under similar plasma conditions but with Kr fill gas, a 3-fold decrease in the in-plasma Kr density was observed.

authors

• Dogariu, Arthur

published proceedings

• Rev Sci Instrum

author list (cited authors)

• Dogariu, A., Cohen, S. A., Jandovitz, P., Vinoth, S., Evans, E. S., & Swanson, C.

citation count

• 2

complete list of authors

• Dogariu, A||Cohen, SA||Jandovitz, P||Vinoth, S||Evans, ES||Swanson, CPS

publication date

• September 2022

publisher

• AIP Publishing  Publisher

published in

• Review of Scientific Instruments  Journal

PubMed Central ID

• 36182459

Digital Object Identifier (DOI)

• 10.1063/5.0101683

start page

• 093519

end page

• 093519

volume

• 93

issue

• 9

URL

• http://dx.doi.org/10.1063/5.0101683