Generation and characterization of quasi-monoenergetic electron beams from laser wakefield
نویسندگان
چکیده
In the interaction of a 30 fs, 40 TW Ti:sapphire Hercules laser focused to the intensity of 1019 W/cm2onto a supersonic He gas jet, we observed quasi-monoenergetic electron beams with energy up to 300 MeV and an angular divergence of 10 mrad. We found that the initial plasma density significantly affects the resultant electron beam. For plasma densities ranging between 2×1019 to 3.5×1019 cm−3, quasimonoenergetic electronswith energies from 80 to 160MeV and a total charge of about 0.5 nCwere produced. Lower plasma densities around 1.5×1019cm−3 produced quasi-monoenergetic electron beams with higher energy, up to 320 ± 50 MeV, but with a decrease of the total charge to about 5 pC. Characterization of the electron beam in terms of the electron’s maximum energy, beam divergence and pointing stability is presented. The performed 2D PIC simulations show the evolution of the laser pulse in the plasma, electron injection, and the specifics of electron acceleration.
منابع مشابه
Generation of tunable, 100–800 MeV quasi-monoenergetic electron beams from a laser-wakefield accelerator in the blowout regimea)
Articles you may be interested in Generation of electron beams from a laser wakefield acceleration in pure neon gas High-quality electron beam from laser wake-field acceleration in laser produced plasma plumes Appl. In this paper, we present results on a scalable high-energy electron source based on laser wakefield acceleration. The electron accelerator using 30–80 TW, 30 fs laser pulses, opera...
متن کاملSTABLE, MONOENERGETIC 50-400 MeV ELECTRON BEAMS WITH A MATCHED LASER WAKEFIELD ACCELERATOR∗
High-power, ultrashort laser pulses have been shown to generate quasi-monoenergetic electron beams from underdense plasmas. Several groups have reported generating high-energy electron beams using either supersonic nozzles or a capillary based system to guide the laser pulse. While, significant progress has been achieved in the last several years, many issues still remain, with respect to point...
متن کاملGeneration of tunable, 100–800 MeV quasi- monoenergetic electron beams from a laser- wakefield accelerator in the blowout regime
متن کامل
Quasi monoenergetic electron bunch generation by frequency variation laser pulse in magnetized plasma
The effect of the frequency variation of laser pulse in uniform magnetized plasma is considered in onedimensional laser wakefield acceleration and carried out particle simulation. It is shown that wakefield amplitude is increased threefold for the negative Gaussian chirped laser pulse in the magnetized plasma. In our simulation, electrons with initial energy about 0.3 MeV with initial energy sp...
متن کاملControl and optimization of a staged laser-wakefield accelerator
We report results of an experimental study of laser-wakefield acceleration of electrons, using a staged device based on a double-jet gas target that enables independent injection and acceleration stages. This novel scheme is shown to produce stable, quasi-monoenergetic, and tunable electron beams. We show that optimal accelerator performance is achieved by systematic variation of five critical ...
متن کامل