Download or read book COUNTER PROPAGATION OF ELECTRON AND CO2 LASER BEAMS IN A PLASMA CHANNEL written by and published by . This book was released on 2002 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: A high-energy CO2 laser is channeled in a capillary discharge. Occurrence of guiding conditions at a relatively low plasma density (

Download or read book Primary Tests of Laser written by and published by . This book was released on 2002 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: A high-energy CO2 laser is channeled in a capillary discharge. Plasma dynamic simulations confirm occurrence of guiding conditions at the relatively low axial plasma density 1 ÷ 4 x 1017 cm−3. A relativistic electron beam transmitted through the capillary changes its properties depending upon the plasma density. We observe focusing, defocusing or steering of the e-beam. Counter-propagation of the electron and laser beams in the plasma channel results in generation of intense picosecond x-ray pulses.

Download or read book Effect of Plasma Channel on Propagation and Distortion of Laser Beam written by Navpreet Singh and published by . This book was released on 2016-10-08 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Application of Accelerators in Research and Industry written by Jerome L. Duggan and published by American Institute of Physics. This book was released on 2003-10-21 with total page 1244 pages. Available in PDF, EPUB and Kindle. Book excerpt: These papers were peer reviewed before publication. This conference covers the use of particle accelerators in research and industry. The research applications include basic atomic and nuclear physics studies with ion beams of energies less than 10 million volts. The applications include the use of ion beams for the analysis of materials. In the proceedings, experiments are outlined for Rutherford Backscattering analysis, particle induced x-ray emission, nuclear reaction analysis and neutron activation analysis. There are also sessions devoted to accelerator technology and the development of new spectrometers and detectors. The meeting also covers radiation processing with electron beams. These topics include cross-linking, sterilization of medical disposables and food preservation by radiation. The conference also includes a medical symposium on the production and use of medical radioisotopes and a symposium on ion implantation primarily for the semiconductor industry.

Download or read book Electron Acceleration in Preformed Plasma Channels with Terawatt CO2 Laser written by and published by . This book was released on 1995 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt: Extended cylindrical plasma channels produced under gas breakdown by axicon-focused laser beams may be used as optical waveguides in laser-driven electron accelerators. Plasma channeling of the laser beams will help to maintain a high acceleration gradient over many Rayleigh lengths. In addition, the rarefied gas density channel produced after the optical gas breakdown, and followed by a plasma column expansion, reduces multiple scattering of the electron beam. A high-power picosecond C02laser operational at the ATF and being further upgraded to the 1 TW level is considered as the source for a plasma channel formation and as the laser accelerator driver. We show how various laser accelerator schemes including beat wave, wake field, and Inverse Cherenkov accelerator benefit from using a channeled short-pulse C02laser as a driver.

Download or read book Plasma Channel Guided Laser Wakefield Accelerator written by Cameron Guy Robinson Geddes and published by . This book was released on 2005 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Laser Beam Propagation Filamentation and Channel Formation in Laser produced Plasmas written by and published by . This book was released on 1996 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The understanding of laser beam propagation through underdense plasmas is of vital importance to laser-plasma interaction experiments, as well as being a fundamental physics issue. Formation of plasma channels has numerous applications including table-top x- ray lasers and laser-plasma-produced particle accelerators. The fast ignitor concept, for example, requires the formation of an evacuated channel through a large, underdense plasma. Scaled experiments have shown that the axial extent of a channel formed by a 100 ps pulse is limited by the onset of the filamentation instability. We have obtained quantitative comparison between filamentation theory and experiment. More recent experiments have shown that by increasing the duration of the channel-forming pulse, the filamentation instability is overcome and the channel extent is substantially increased. This result has important implications for the fast ignitor design and the understanding of time-dependent beam dynamics.

Download or read book Propagation of Relativistic Electron Beams in Current Carrying Plasma Channels written by D. P. Bacon and published by . This book was released on 1980 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental results of propagating up to 400 kA of relativistic electron beams (approx. 1 MeV) over a distance of 64 cm in a tightly focused mode are reported. Efficient transport (greater than 80%) was observed when a channel of plasma containing enough current to confine the hot electrons was used. Theory of the flow includes return current effects, and is in good agreement with experimental results. The theory is used to predict limits of this technique. (Author).

Download or read book Insulation of High Voltage Equipment written by Vasily Y. Ushakov and published by Springer Science & Business Media. This book was released on 2004-03-05 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: High-voltage electrophysical systems used for research in physics are becoming more and more common in engineering applications, as electrical insulation comprises one of the most important constituent components. This is the first monograph dealing comprehensively and on a scientific level with the insulation of such systems. In the first part of the book, the operating conditions and necessary requirements are analyzed, while the main insulation types are outlined. The second part describes the short- and long-term strengths of vacuums and gases, as well as liquid, solid, and hybrid dielectrics as functions of various influencing factors. The third and last part is devoted to the design of high-voltage insulation systems. The knowledge provided by this book will be useful to physicists designing experimental high-voltage devices as well as to electrical engineers in high-voltage technology, electrical insulation, and cable industries.

Download or read book Propagation of Short Laser Pulses in Plasma Channels written by P. Sprangle and published by . This book was released on 1999 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: Finite pulse length effects are shown to play a major role in the propagation, stability and guiding of intense laser beams in plasmas. We present the quasi paraxial approximation (QPA) to the wave equation that takes finite pulse length effects into account. The QPA is an extension of the usual paraxial approximation. The laser field is shown to be significantly modified for pulses less than a few tens of wavelengths long. A pair of coupled envelope-power equations having finite pulse length effects, as well as relativistic and atomic electron nonlinearities, is derived and analyzed. Short laser pulses propagating in plasma channels are found to undergo an envelope oscillation in which the front of the pulse is always damped while the back initially grows. The modulation eventually damps due to frequency spread phase mixing. In addition, finite pulse length effects are shown to significantly modify nonlinear focusing processes.

Download or read book Acceleration and Compression of Charged Particle Bunches Using Counter propagating Laser Beams written by G. Shvets and published by . This book was released on 2000 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book EXPERIMENTS ON LASER AND E BEAM TRANSPORT AND INTERACTION IN A PLASMA CHANNEL written by and published by . This book was released on 2004 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: An ablative capillary discharge is installed into a linac beamline and serves as a plasma source for generating and characterizing wakefields. Simultaneously, the electron beam is used as a tool for plasma diagnostics. A high-energy picosecond CO2 laser channeled within the same capillary strongly affects a counterpropagating electron beam. These observations, supported with simulations, suggest the possibility of manipulating relativistic electron beams by steep plasma channels ponderomotively produced by a laser.

Download or read book Study of Laser Plasma Interactions in the Relativistic Regime written by and published by . This book was released on 1997 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: We discuss the first experimental demonstration of electron acceleration by a laser wakefield over instances greater than a Rayleigh range (or the distance a laser normally propagates in vacuum). A self-modulated laser wakefield plasma wave is shown to have a field gradient that exceeds that of an RF linac by four orders of magnitude (E => 200 GV/m) and accelerates electrons with over 1-nC of charge per bunch in a beam with space-charge-limited emittance (1 mm-mrad). Above a laser power threshold, a plasma channel, created by the intense ultrashort laser pulse (I approx. 4 x1018 W/CM2, gamma = 1 micron, r = 400 fs), was found to increase the laser propagation distance, decrease the electron beam divergence, and increase the electron energy. The plasma wave, directly measured with coherent Thomson scattering is shown to damp-due to beam loading-in a duration of 1.5 ps or approx. 100 plasma periods. These results may have important implications for the proposed fast ignitor concept.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1992 with total page 1572 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Guiding a high energy laser beam through a plasma channel written by Alexander Debus and published by . This book was released on 2004 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Excitation of Accelerating Plasma Waves by Counter propagating Laser Beams written by G. Shvets and published by . This book was released on 2001 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Directory of Graduate Research written by American Chemical Society. Committee on Professional Training and published by . This book was released on 2005 with total page 1932 pages. Available in PDF, EPUB and Kindle. Book excerpt: Faculties, publications and doctoral theses in departments or divisions of chemistry, chemical engineering, biochemistry and pharmaceutical and/or medicinal chemistry at universities in the United States and Canada.