نتایج جستجو برای: relativistic electron beam
تعداد نتایج: 428847 فیلتر نتایج به سال:
The Droblem of the abru~t change of the direction of a crack, DroDagating with high velocity, is studied in the resent work. The study is based on a unified ao~roach of the directional instability ~henomena, which accomDany running cracks. According to this ao~roach, the running ti^ is simulated by a reb branched configuration, consisted of two microcracks of arbitrary lengths and orientations....
The current status of subrelativistic acceleration via optical-scale Dielectric Laser Accelerators (DLAs), with an emphasis on those developed and tested at FriedrichAlexander University in Erlangen, Germany, is reviewed. This promising field of accelerators has demonstrated proofof-principle results in multiple energy regimes and current efforts are moving towards developing miniaturized stand...
In this talk I will try to review some of the early experimrnts in the field of electron-proton scattering, concent.rnt,ing mostly on t,he inelastic scattering rxperimentn at SLAC. Ordinarily, t,hose experiments would be covered in the first. five or ten minutes of the talks by Professors Sruilli and Drrll, but (.his is a special yrar, and I will fwl free t.o rrminisce about the early days in a...
We have used relativistic klystron technology to extract 290-MW of peak power ‘at 11.4 GHz from an induction linac beam, and to power a short 11.4-GHz highgradient accelerator. We have measured rf phase stability, field-emission, and the momentum spectrum of an accelerated electron beam. An average accelerating gradient of 84 MV/ h b m as een achieved with 80-MW of relativistic klystron power.
Copropagation of a laser pulse and a relativistic electron beam in a corrugated plasma channel has been proposed for the direct laser acceleration of electrons [Palastro, Phys. Rev. E 77, 036405 (2008)]. The corrugated plasma channel allows for the guiding of laser pulses composed of subluminal spatial harmonics. Phase matching between the electron beam and the spatial harmonics results in acce...
چکیده ندارد.
This paper presents the measurement of sub-picosecond relativistic electron beam bunch length by analyzing the spectra of the coherent terahertz pulses through Kramers-Kronig transformation. The results are compared with autocorrelation from a scanning polarization autocorrelator that measures the coherent optical transition radiation. The limitations of the different methods to such a characte...
The use of relativistic electron beams for supplementary heating of tokamaks to ignition temperatures is discussed, under the assumption that they can be successfully injected. It is shown that if an electron beam with presentstate-of-the-art power, but longer pulse length, can be injected into an Ohmically pre-heated tokamak plasma, it transfers its energy to the plasma on a time-scale short e...
We describe two diagnostic methods for measuring the velocity of mildly relativistic, high current electron beams. The first involves a measurement of the radial electrostatic potential and of the beam current and yields the time resolved, spatially averaged axial beam velocity v,,. The second requires a measurement of the beam cyclotron wavelength in the guiding magnetic field and yields the p...
We report the near-steady-state propagation over long distance of a 25 psec, tightly focused relativistic electron beam which creates, by radial ejection of plasma electrons, a focusing ion channel in a plasma of electron density smaller than the beam. A dense beam core, close in radius to the injected beam, which was nearly matched to the ion focusing strength, is observed at the plasma exit. ...
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