Absolute two-photon ionization yields for selected organic molecules at 248 nm

Plasma Wakefield Effects On High-Current Relativistic Electron Beam Transport In The Ion-Focused Regime

“…This result is in reasonable agreement with the previous measurements 20 and supports the use of Eq. (3) to determine the plasma density for fractional ionization yields up to 10" 3 .…”

“…A simple model that agrees well with previous experimental data for fractional ionization yields on the order of 10 3 or less, is that the fractional ionization (the ratio of plasma density n p to the neutral gas density n 0 ) depends quadratically on the laser fluence. 20 This relationship takes the…”

“…Previous measurements have determined the value for C to be in the range 1.52x10* to 1.83x10* cmVmJ 2 for laser pulse widths between 13.2 and 5.65 ns respectively for KrF laser ionization of TMA. 20 The situation of particular interest to our experiment is whether this relationship is appropriate for laser photoionization of partially ionized TMA. The photoionization process may be effected due to the presence of a low-density DC discharge.…”

Model for a UV Laser Based Local Polymer Surface Halogenation Process Using a Gaseous Precursor

“…In the modeling of the photodissociation process, a single photon photodissociation is assumed. For two-or more-photon absorption, Equations (1) and (2) have to be adopted, as for example described in [7][8][9].…”

“…In the latter case, the second photon needs to be absorbed while the molecule is in the excited state. Sometimes, both ways of photodissociation can occur [8]. The correlation between absorbed photons then strongly depends on the photon flux.…”