1887
banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
Plasma expansion into a waveguide created by a linearly polarized femtosecond laser pulse
Rent:
Rent this article for
USD
10.1063/1.4810797
/content/aip/journal/pop/20/6/10.1063/1.4810797
http://aip.metastore.ingenta.com/content/aip/journal/pop/20/6/10.1063/1.4810797
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) Gaussian laser pulse electric field. (b) Detail of a portion of a cycle of the laser electric field (red solid line), the ionization rate given by the ADK model (blue point curve), and the possible energies that the electrons can gain (green dashed curve) in a.u.

Image of FIG. 2.
FIG. 2.

(a) Energy distribution for the ionized populations of (red squares), (blue points) with 4 × 10 W cm laser intensity. (b) Energy distribution of a . The black dashed line represents a exponential fit to the energy distributions in order to calculate the electron temperature.

Image of FIG. 3.
FIG. 3.

Contribution to the initial plasma temperature, given by electron-ion collisions, as a function of laser pulse duration and intensity for the same laser pulse energy. The blue point line represents a plasma of with an initial temperature of 203 eV and the green dashed line a plasma of with an initial temperature of 18 eV all with a plasma density of

Image of FIG. 4.
FIG. 4.

Experimental setup.

Image of FIG. 5.
FIG. 5.

(a) Shadowgraphy of a hydrogen plasma column created in a 4 mm nozzle. (b) Interferogram of the central part of the plasma.

Image of FIG. 6.
FIG. 6.

(a) Laser beam profile at the entrance of the nozzle of 4 mm and 8 mm when using hydrogen gas (f/28 lens). (b) Laser beam profile at the entrance of the 8 mm nozzle when using helium gas (f/14 lens).

Image of FIG. 7.
FIG. 7.

Shadowgraphy of a hydrogen plasma column created with a f/28 lens in a Mach 3, 4 mm nozzle with a backup pressure of 8 bar. Parts (a)–(e) show the shadow at different time delays: (a) 0 ns, (b) 0.5 ns, (c) 1 ns, (d) 1.5 ns, and (e) 2 ns.

Image of FIG. 8.
FIG. 8.

Temporal evolution of the electron plasma density averaged over the longitudinal direction for a hydrogen plasma column created with a f/28 lens in an 4 mm nozzle with a backup pressure of 8 bar.

Image of FIG. 9.
FIG. 9.

Temporal evolution of the electron plasma density averaged over the longitudinal direction for a helium plasma column created with a f/14 lens in an 8 mm nozzle with a backup pressure of 20 bar.

Image of FIG. 10.
FIG. 10.

Shock position vs time for a hydrogen plasma column created in a 4 mm Laval nozzle at 6 bar (red) and at 8 bar (green). Also for a plasma created in an 8 mm Laval nozzle with hydrogen (black) and helium (blue) at 20 bar.

Image of FIG. 11.
FIG. 11.

Match spot size vs time for a hydrogen plasma column created in a 4 mm Laval nozzle at 6 bar (red) and at 8 bar (green). Also for a plasma created in an 8 mm Laval nozzle with hydrogen (black) and helium (blue) at 20 bar.

Loading

Article metrics loading...

/content/aip/journal/pop/20/6/10.1063/1.4810797
2013-06-12
2014-04-17
Loading

Full text loading...

This is a required field
Please enter a valid email address
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Plasma expansion into a waveguide created by a linearly polarized femtosecond laser pulse
http://aip.metastore.ingenta.com/content/aip/journal/pop/20/6/10.1063/1.4810797
10.1063/1.4810797
SEARCH_EXPAND_ITEM