Terawatt Raman laser system for two-color laser plasma interactions
MetadataShow full item record
In some high-field laser-plasma experiments, it is advantageous to accompany the main high-energy (~1 J) laser with a second high-energy pulse (~0.1 J) which has been frequency-shifted by ~10-20%. Such a pulse-pair would have a low walk-off velocity while remaining spectrally distinct for use in two-color pump-probe experiments. Moreover, by shifting the second pulse by ~plasma frequency, it is theoretically possible to exercise some amount of control over a variety of laser-plasma instabilities, including forward Raman scattering, electromagnetic cascading, and relativistic self-focusing. Alternatively, the two pulses may be counter-propagated so that the collide in the plasma and create a slowly-propagating beatwave which can be used to inject electrons into a laser wakefield accelerator. The design, characeterization, and performance of a hybrid chirped-pulse Raman amplifier (CPRA)/Ti-Sapphire amplifier are reported and discussed. This hybrid system allows for the generation of a high-energy (>200 mJ), broadband (15-20 nm bandwidth FWHM), short duration (>100 fs duration) laser sideband. When amplified and compressed, the Raman beam's power exceeds 1 TW. This sideband is combined with the primary laser system to create a bi-color terawatt laser system which is capable of performing two-color high-field experiments. This two-color capability can be added to any commercial terawatt laser system without compromising the energy, duration or beam quality of the primary system. Preliminary two-color laser-plasma experiments are also discussed.
Showing items related by title, author, creator and subject.
Two-color high intensity laser plasma interaction phenomena, and status of experiments on the UT³ laser system Jolly, Spencer Windhorst (2014-05)We report the status of two-color high intensity laser-plasma interaction experiments on the UT³ laser system at the University of Texas at Austin. After an outline of the experimental apparatus, an overview of the motivating ...
Isochoric heating of copper to Warm Dense Matter state using protons produced through laser solid-laser interactions Feldman, Samuel Henry (2013-05)This thesis examines the equation of state of copper at Warm Dense Matter states, between 1-100 eV and .1-10 times solid density. Protons accelerated off a thin metal foil irradiated with a high intensity laser beam flash ...
Experimental studies of laser driven proton acceleration from ultrashort and highly intense laser pulse interaction with overdense plasma Kuk, Donghoon (2014-12)The generation of high current multi-MeV protons and ions by irradiation of short pulse high intense laser on an ultra-thin target has been observed and subjected great interest in recent. When ultra-thin overdense target ...