Article
Acceleration of a trailing positron bunch in a plasma wakefield accelerator. Público Deposited
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https://scholar.colorado.edu/concern/articles/8w32r635s
- Abstract
- High gradients of energy gain and high energy efficiency are necessary parameters for compact, cost-efficient and high-energy particle colliders. Plasma Wakefield Accelerators (PWFA) offer both, making them attractive candidates for next-generation colliders. In these devices, a charge-density plasma wave is excited by an ultra-relativistic bunch of charged particles (the drive bunch). The energy in the wave can be extracted by a second bunch (the trailing bunch), as this bunch propagates in the wake of the drive bunch. While a trailing electron bunch was accelerated in a plasma with more than a gigaelectronvolt of energy gain, accelerating a trailing positron bunch in a plasma is much more challenging as the plasma response can be asymmetric for positrons and electrons. We report the demonstration of the energy gain by a distinct trailing positron bunch in a plasma wakefield accelerator, spanning nonlinear to quasi-linear regimes, and unveil the beam loading process underlying the accelerator energy efficiency. A positron bunch is used to drive the plasma wake in the experiment, though the quasi-linear wake structure could as easily be formed by an electron bunch or a laser driver. The results thus mark the first acceleration of a distinct positron bunch in plasma-based particle accelerators.
- Creator
- Date Issued
- 2017-10-27
- Academic Affiliation
- Journal Title
- Journal Issue/Number
- 1
- Journal Volume
- 7
- File Extent
- 14180-14180
- Última modificação
- 2019-12-05
- Identifier
- PubMed ID: 29079817
- Resource Type
- Declaração de direitos
- DOI
- ISSN
- 2045-2322
- Language
- License
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Itens
Miniatura | Título | Data de carga | Acesso | Ações |
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accelerationOfATrailingPositronBunchInAPlasmaWakefieldA.pdf | 2019-12-05 | Público | Baixar | |
accelerationOfATrailingPositronBunchInAPlasmaWakefieldA.pdf | 2019-12-05 | Público | Baixar |