منابع مشابه
Limits of Plasma Focusing of High Current Electron Beams
Limits of the electron beam density in the focus are evaluated. As it shown, the maximal beam density is achievable in the relativistic vacuum diode with the needle anode. In such a device, the initial emittance of a beam is rather small. The electron beam gains emittance while being focused with positive ions into the anode due to collisions with the ions. Based on the paraxial beam model, the...
متن کاملHigh Current and High Brightness Electron Sources
The development of high current, high brightness electron guns is critically important for free-electron laser and energy recovery linear-accelerator light source facilities. In this paper, we will review the technical requirements of such projects and the status of on-going research throughout the community including results of emittance measurements and high current beam performance.
متن کاملThe Effect of Asymmetric Plasma Plumes on the Transport of High-current Electron Beams
Advanced accelerator-based radiographic diagnostics require multiple high-current electron beam pulses for temporal resolution. The use of “kicked” beams or the failure of a transport element on a prior pulse can result in the production of a plasma plume from locations where the beam sweeps across the beam pipe, due to high thermal deposition by the beam. It is possible for this plasma to evol...
متن کاملHigh Average Current Electron Guns for High-Power FELs
High average power FELs require high average current electron injectors capable of generating high quality, short duration electron bunches with a repetition rate equal to the frequency of the rf linac. In this paper we propose, analyze and simulate an rf-gated, gridded thermionic electron gun for use in high average power FELs. Thermionic cathodes can provide the necessary high current, have l...
متن کاملA High Current, High Gradient, Laser Excited, Pulsed Electron Gun
This paper describes a pulsed electron gun that can be used as an FEL, as an injector for electron linear accelerators or for rf power generation. It comprises a 1 to 5 MeV, 1 to 2 ns pulsed power supply feeding a single diode, photoexcited acceleration gap. Beam quality of a ~ 1nC charge in ~ 1 GV/m field was studied. Computations of the beam parameters as a function of electrode configuration...
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ژورنال
عنوان ژورنال: Plasma Sources Science and Technology
سال: 1996
ISSN: 0963-0252,1361-6595
DOI: 10.1088/0963-0252/5/1/010