dorsal/arxiv
View SchemaSelf-pinching of a relativistic electron bunch in a drift tube
| Authors | Claudio G. Parazzoli, Benjamin E. C. Koltenbah |
|---|---|
| Categories | |
| ArXiv ID | physics/9708013 |
| URL | https://arxiv.org/abs/physics/9708013 |
Abstract
Electron bunches with charge densities $\rho$ of the order of $10^2$ to $10^3$ [nC/cm$^3$], energies between $20.$ and $100.$ [MeV], peak current $>100$ [A], bunch lengths between 0.3 and 1.8 [cm], and bunch charge of 2.0 to $20.$ [nC] are relevant to the design of Free Electron Lasers and future linear colliders. In this paper we present the results of numerical simulations performed with a particle in a cell (pic) code of an electron bunch in a drift tube. The electron bunch has cylindrical symmetry with the $z$-axis oriented in the direction of motion. The charge density distribution is constant in the radial and Gaussian in the longitudinal direction, respectively. The electron bunch experiences both a radial pinch in the middle of the pulse, corresponding to the peak electron density, and a significant growth of the correlated emittance. This behavior is explained, and an approximate scaling law is identified. Comparisons of the results from the pic and PARMELA codes are presented.
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"abstract": "Electron bunches with charge densities $\\rho$ of the order of $10^2$ to\n$10^3$ [nC/cm$^3$], energies between $20.$ and $100.$ [MeV], peak current\n$\u003e100$ [A], bunch lengths between 0.3 and 1.8 [cm], and bunch charge of 2.0 to\n$20.$ [nC] are relevant to the design of Free Electron Lasers and future linear\ncolliders. In this paper we present the results of numerical simulations\nperformed with a particle in a cell (pic) code of an electron bunch in a drift\ntube. The electron bunch has cylindrical symmetry with the $z$-axis oriented in\nthe direction of motion. The charge density distribution is constant in the\nradial and Gaussian in the longitudinal direction, respectively. The electron\nbunch experiences both a radial pinch in the middle of the pulse, corresponding\nto the peak electron density, and a significant growth of the correlated\nemittance. This behavior is explained, and an approximate scaling law is\nidentified. Comparisons of the results from the pic and PARMELA codes are\npresented.",
"arxiv_id": "physics/9708013",
"authors": [
"Claudio G. Parazzoli",
"Benjamin E. C. Koltenbah"
],
"categories": [
"physics.acc-ph",
"physics.class-ph",
"physics.comp-ph",
"physics.plasm-ph"
],
"title": "Self-pinching of a relativistic electron bunch in a drift tube",
"url": "https://arxiv.org/abs/physics/9708013"
},
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