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Charged particle beam — Wikipedia (en)

Source: Wikipedia (en)
Original: https://en.wikipedia.org/wiki/Charged_particle_beam
License (as archived): CC-BY-SA-4.0
Archived: 2026-10-07T23:20:46.093Z
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Charged particle beam — Wikipedia (en) — Wikipedia (en), https://en.wikipedia.org/wiki/Charged_particle_beam (CC-BY-SA-4.0); archived copy: https://metraipolis.com/documento/dc_265def2ab99f (Metraipolis archive dc_265def2ab99f, sha256 b56caabec705aa4e5ffa44f26c17cefbce960e8370783e75a1b1f8a433b83d84)

BibTeX

@misc{dc265def2ab99f,
  title = {Charged particle beam — Wikipedia (en)},
  howpublished = {Wikipedia (en)},
  url = {https://en.wikipedia.org/wiki/Charged_particle_beam},
  note = {License CC-BY-SA-4.0; archived copy https://metraipolis.com/documento/dc_265def2ab99f; sha256 b56caabec705aa4e5ffa44f26c17cefbce960e8370783e75a1b1f8a433b83d84},
  year = {2026}
}

Archived text

Reproduced under CC-BY-SA-4.0. Attribution: Wikipedia (en), https://en.wikipedia.org/wiki/Charged_particle_beam. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

A charged particle beam is a spatially localized group of electrically charged particles that have approximately the same position, kinetic energy (resulting in the same velocity), and direction. The kinetic energies of the particles are much larger than the energies of particles at ambient temperature. The high energy and directionality of charged particle beams make them useful for many applications in particle physics (see Particle beam#Applications and Electron-beam technology). Such beams can be split into two main classes: unbunched beams (coasting beams or DC beams), which have no longitudinal substructure in the direction of beam motion. bunched beams, in which the particles are distributed into pulses (bunches) of particles. Bunched beams are most common in modern facilities, since the most modern particle accelerators require bunched beams for acceleration. Assuming a normal distribution of particle positions and impulses, a charged particle beam (or a bunch of the beam) is characterized by the species of particle, e.g. electrons, protons, or atomic nuclei the mean energy of the particles, often expressed in electronvolts (typically keV to GeV) the (average) particle current, often expressed in amperes the particle beam size, often using the so-called β-function the beam emittance, a measure of the area occupied by the beam in one of several phase spaces. These parameters can be expressed in various ways. For example, the current and beam size can be combined into the current density, and the current and energy (or beam voltage V) can be combined into the perveance K = I V−3/2. The charged particle beams that can be manipulated in particle accelerators can be subdivided into electron beams, ion beams and proton beams.

Tema degli esploratori: fisica e astronomia (deposito sistematico; ricerca «particle physics»).
Fonte: Wikipedia in inglese, voce «Charged particle beam» — https://en.wikipedia.org/wiki/Charged_particle_beam
Wikidata Q3064607 (dati Wikidata in CC0 1.0) — https://www.wikidata.org/wiki/Q3064607
Autori: i contributori di Wikipedia (cronologia: https://en.wikipedia.org/wiki/Charged_particle_beam?action=history).
Licenza: Creative Commons Attribuzione-Condividi allo stesso modo 4.0 (CC BY-SA 4.0) — https://creativecommons.org/licenses/by-sa/4.0/. Il riuso richiede attribuzione e stessa licenza.
Estratto dell'introduzione non modificato nel contenuto; revisione 1362145742, consultata il 2026-10-07T22:57:54.647Z tramite l'API ufficiale di Wikipedia. Impronta SHA-256 dell'estratto: cd0f58649cb38755e9856c4d694e044c33fcb00367219ba1937534bc1354a90a