Elimination of Laser Prepulse by Relativistic Guiding in a Plasma PDF Download
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Languages : en
Pages : 14
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Book Description
A method is proposed for eliminating prepulses associated with high power, ultrashort laser pulses. In this method the high power portion of the pulse is refractively guided due to relativistic effects associated with the plasma electrons. The low power prepulse, however, is unaffected by the plasma and diffracts away. Optical guiding is achieved by appropriately choosing the plasma density, laser power and wavelength. In addition, a wavebreaking stabilization mechanism for the Raman backscattering instability for intense laser pulses is proposed. This stabilization mechanism indicates that the intense laser pulse should not be significantly backscattered by the plasma. (jhd).
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 14
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Book Description
A method is proposed for eliminating prepulses associated with high power, ultrashort laser pulses. In this method the high power portion of the pulse is refractively guided due to relativistic effects associated with the plasma electrons. The low power prepulse, however, is unaffected by the plasma and diffracts away. Optical guiding is achieved by appropriately choosing the plasma density, laser power and wavelength. In addition, a wavebreaking stabilization mechanism for the Raman backscattering instability for intense laser pulses is proposed. This stabilization mechanism indicates that the intense laser pulse should not be significantly backscattered by the plasma. (jhd).
Author:
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Category : Aeronautics
Languages : en
Pages : 604
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Author:
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Category :
Languages : en
Pages :
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Guiding of relativistically intense (>1018 W/cm2) laser pulses over more than 10 diffraction lengths has been demonstrated using plasma channels formed by hydrodynamic shock. Pulses up to twice the self guiding threshold power were guided without aberration by tuning the guide profile. Transmitted spectra and mode images showed the pulse remained in the channel over the entire length. Experiments varying guided mode power and simulations show a large plasma wave was driven. Operating just below the trapping threshold produces a dark current free structure suitable for controlled injection.
Author:
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Category : Aeronautics
Languages : en
Pages : 832
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Author: Joon-Koo Kim
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Category :
Languages : en
Pages : 366
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Author:
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Category : Physics
Languages : en
Pages : 1328
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Author: Evan Stuart Dodd
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Category :
Languages : en
Pages : 334
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Author: C. B. Schroeder
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Category :
Languages : en
Pages : 5
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Book Description
Electron beams with hundreds of picoCoulombs of charge in percent energy spread at above 80 MeV, and with few milliradian divergence, have been produced for the first time in a high gradient laser wakefield accelerator by guiding the drive laser pulse. Channels formed by hydrodynamic shock were used to guide acceleration relevant laser intensities of at least 1E18W/cm2 at the guide output over more than 10 Rayleigh lengths at LBNL's l'OASIS facility (10TW, 2E19W/cm2). The pondermotive force of the laser pulse drove an intense plasma wave, producing acceleration gradients on the order of 100 GV/m. Electrons were trapped from the background plasma and accelerated. By extending the acceleration length using the guiding channel, the energy of the electron beam was greatly increased, and bunches of small energy spread and low emittance were formed. Experiments varying gas jet length as well assimilations indicate that the high quality beams were formed when beam loading turned off injection after an initial load, producing an isolated bunch, and when that bunch was subsequently accelerated to the dephasing length at which point it rotated in phase space to produce low energy spread.
Author: Paul R. Bolton
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 484
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Book Description
Selected papers from the Second International Symposium on Laser-Driven Relativistic Plasmas Applied to Science, Industry and Medicine, which was held at the Kansai Photon Science Institute of the Japan Atomic Energy Agency--P. xii.
![Laser Guiding At]1018 W/cm2 in Plasma Channels Formed by Theignitor Heater Method PDF](https://books.google.com/books/content/images/frontcover/GLOHDAEACAAJ?fife=w80-h100)
Author: C. G. R. Geddes
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Category :
Languages : en
Pages :
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Book Description
Experiments explore guiding of intense laser pulses, optimization using channel formation beams and gas jet targets, and the interplay of channel guiding and relativistic self guiding. Impact on laser wakefield particle acceleration is being assessed.
