Peculiarities of measuring fluorescence decay times by a streak camera for ps-TALIF experiments in reactive plasmas

Abstract We present a detailed methodology for (i) correctly configuring streak camera to capture raw picosecond two-photon absorption laser induced fluorescence signals (ps-TALIF) of H-atom in low- and atmospheric-pressure plasmas, (ii) properly processing the recorded experimental data with dedicated mathematical signal method infer actual ps-TALIF H-atom. The goal is accurate determination decay time A ps-laser used excite atomic hydrogen produced both plasmas are detected by using different windows/ranges (TR). It shown that choice TR affects shapes times TALIF signals. This defined as instrumental function has Gaussian profile determined recording ultrafast pulse at TR. To remove this distortion extract shape signals, captured were fitted procedure developed study, which involved an exponentially modified function. application our leads more reliable measurements atoms after respecting following acquisition conditions: should be sufficiently large complete (raw) signal, width small possible compared fluorescence, while ensuring optimal signal-to-noise ratio. work demonstrates remarkable potential combination cameras state-of-the-art optical plasma diagnostics.