1
|
Huang K, Jin Z, Nakanii N, Hosokai T, Kando M. Electro-optic 3D snapshot of a laser wakefield accelerated kilo-ampere electron bunch. LIGHT, SCIENCE & APPLICATIONS 2024; 13:84. [PMID: 38584154 PMCID: PMC10999425 DOI: 10.1038/s41377-024-01440-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 02/27/2024] [Accepted: 03/25/2024] [Indexed: 04/09/2024]
Abstract
Laser wakefield acceleration, as an advanced accelerator concept, has attracted great attentions for its ultrahigh acceleration gradient and the capability to produce high brightness electron bunches. The three-dimensional (3D) density serves as an evaluation metric for the particle bunch quality and is intrinsically related to the applications of an accelerator. Despite its significance, this parameter has not been experimentally measured in the investigation of laser wakefield acceleration. We report on an electro-optic 3D snapshot of a laser wakefield electron bunch at a position outside the plasma. The 3D shape of the electron bunch was detected by simultaneously performing optical transition radiation imaging and electro-optic sampling. Detailed 3D structures to a few micrometer levels were reconstructed using a genetic algorithm. The electron bunch possessed a transverse size of less than 30 micrometers. The current profile shows a multi-peak structure. The main peak had a duration of < 10 fs and a peak current > 1 kA. The maximum electron 3D number density was ~ 9 × 1021 m -3. This research demonstrates a feasible way of 3D density monitoring on femtosecond kilo-ampere electron bunches, at any position of a beam transport line for relevant applications.
Collapse
Affiliation(s)
- Kai Huang
- Kansai Institute for Photon Science (KPSI), National Institutes for Quantum Science and Technology (QST), Kyoto, Japan.
- Laser Accelerator R&D, Innovative Light Sources Division, RIKEN SPring-8 Center, Hyogo, Japan.
| | - Zhan Jin
- Laser Accelerator R&D, Innovative Light Sources Division, RIKEN SPring-8 Center, Hyogo, Japan
- SANKEN, Osaka University, Osaka, Japan
| | - Nobuhiko Nakanii
- Kansai Institute for Photon Science (KPSI), National Institutes for Quantum Science and Technology (QST), Kyoto, Japan
- Laser Accelerator R&D, Innovative Light Sources Division, RIKEN SPring-8 Center, Hyogo, Japan
| | - Tomonao Hosokai
- Laser Accelerator R&D, Innovative Light Sources Division, RIKEN SPring-8 Center, Hyogo, Japan
- SANKEN, Osaka University, Osaka, Japan
| | - Masaki Kando
- Kansai Institute for Photon Science (KPSI), National Institutes for Quantum Science and Technology (QST), Kyoto, Japan
- Laser Accelerator R&D, Innovative Light Sources Division, RIKEN SPring-8 Center, Hyogo, Japan
| |
Collapse
|
2
|
Miller KG, Pierce JR, Ambat MV, Shaw JL, Weichman K, Mori WB, Froula DH, Palastro JP. Dephasingless laser wakefield acceleration in the bubble regime. Sci Rep 2023; 13:21306. [PMID: 38042954 PMCID: PMC10693645 DOI: 10.1038/s41598-023-48249-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Accepted: 11/23/2023] [Indexed: 12/04/2023] Open
Abstract
Laser wakefield accelerators (LWFAs) have electric fields that are orders of magnitude larger than those of conventional accelerators, promising an attractive, small-scale alternative for next-generation light sources and lepton colliders. The maximum energy gain in a single-stage LWFA is limited by dephasing, which occurs when the trapped particles outrun the accelerating phase of the wakefield. Here, we demonstrate that a single space-time structured laser pulse can be used for ionization injection and electron acceleration over many dephasing lengths in the bubble regime. Simulations of a dephasingless laser wakefield accelerator driven by a 6.2-J laser pulse show 25 pC of injected charge accelerated over 20 dephasing lengths (1.3 cm) to a maximum energy of 2.1 GeV. The space-time structured laser pulse features an ultrashort, programmable-trajectory focus. Accelerating the focus, reducing the focused spot-size variation, and mitigating unwanted self-focusing stabilize the electron acceleration, which improves beam quality and leads to projected energy gains of 125 GeV in a single, sub-meter stage driven by a 500-J pulse.
Collapse
Affiliation(s)
- Kyle G Miller
- Laboratory for Laser Energetics, University of Rochester, Rochester, NY, 14623-1299, USA.
| | - Jacob R Pierce
- Department of Physics and Astronomy, University of California, Los Angeles, CA, 90095, USA
| | - Manfred V Ambat
- Laboratory for Laser Energetics, University of Rochester, Rochester, NY, 14623-1299, USA
| | - Jessica L Shaw
- Laboratory for Laser Energetics, University of Rochester, Rochester, NY, 14623-1299, USA
| | - Kale Weichman
- Laboratory for Laser Energetics, University of Rochester, Rochester, NY, 14623-1299, USA
| | - Warren B Mori
- Department of Physics and Astronomy, University of California, Los Angeles, CA, 90095, USA
- Department of Electrical and Computer Engineering, University of California, Los Angeles, CA, 90095, USA
| | - Dustin H Froula
- Laboratory for Laser Energetics, University of Rochester, Rochester, NY, 14623-1299, USA
| | - John P Palastro
- Laboratory for Laser Energetics, University of Rochester, Rochester, NY, 14623-1299, USA
| |
Collapse
|
3
|
Dewhurst KA, Muratori BD, Brunetti E, van der Geer B, de Loos M, Owen HL, Wiggins SM, Jaroszynski DA. A beamline to control longitudinal phase space whilst transporting laser wakefield accelerated electrons to an undulator. Sci Rep 2023; 13:8831. [PMID: 37258601 DOI: 10.1038/s41598-023-35435-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Accepted: 05/17/2023] [Indexed: 06/02/2023] Open
Abstract
Laser wakefield accelerators (LWFAs) can produce high-energy electron bunches in short distances. Successfully coupling these sources with undulators has the potential to form an LWFA-driven free-electron laser (FEL), providing high-intensity short-wavelength radiation. Electron bunches produced from LWFAs have a correlated distribution in longitudinal phase space: a chirp. However, both LWFAs and FELs have strict parameter requirements. The bunch chirp created using ideal LWFA parameters may not suit the FEL; for example, a chirp can reduce the high peak current required for free-electron lasing. We, therefore, design a flexible beamline that can accept either positively or negatively chirped LWFA bunches and adjust the chirp during transport to an undulator. We have used the accelerator design program MAD8 to design a beamline in stages, and to track particle bunches. The final beamline design can produce ambidirectional values of longitudinal dispersion ([Formula: see text]): we demonstrate values of + 0.20 mm, 0.00 mm and - 0.22 mm. Positive or negative values of [Formula: see text] apply a shear forward or backward in the longitudinal phase space of the electron bunch, which provides control of the bunch chirp. This chirp control during the bunch transport gives an additional free parameter and marks a new approach to matching future LWFA-driven FELs.
Collapse
Affiliation(s)
- Kay A Dewhurst
- Department of Physics and Astronomy, The University of Manchester, Manchester, M13 9PL, UK.
- The Cockcroft Institute, Warrington, WA4 4AD, UK.
- Beams Department (BE), CERN, 1211, Geneva, Switzerland.
| | - Bruno D Muratori
- The Cockcroft Institute, Warrington, WA4 4AD, UK
- ASTeC, UKRI-STFC Daresbury Laboratory, Warrington, WA4 4FS, UK
| | - Enrico Brunetti
- SUPA, Department of Physics, University of Strathclyde, Glasgow, G4 0NG, UK
| | | | | | - Hywel L Owen
- The Cockcroft Institute, Warrington, WA4 4AD, UK
- ASTeC, UKRI-STFC Daresbury Laboratory, Warrington, WA4 4FS, UK
| | - S Mark Wiggins
- SUPA, Department of Physics, University of Strathclyde, Glasgow, G4 0NG, UK
| | - Dino A Jaroszynski
- SUPA, Department of Physics, University of Strathclyde, Glasgow, G4 0NG, UK.
| |
Collapse
|
4
|
Review of Quality Optimization of Electron Beam Based on Laser Wakefield Acceleration. PHOTONICS 2022. [DOI: 10.3390/photonics9080511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Compared with state-of-the-art radio frequency accelerators, the gradient of laser wakefield accelerators is 3–4 orders of magnitude higher. This is of great significance in the development of miniaturized particle accelerators and radiation sources. Higher requirements have been proposed for the quality of electron beams, owing to the increasing application requirements of tabletop radiation sources, specifically with the rapid development of free-electron laser devices. This review briefly examines the electron beam quality optimization scheme based on laser wakefield acceleration and presents some representative studies. In addition, manipulation of the electron beam phase space by means of injection, plasma profile distribution, and laser evolution is described. This review of studies is beneficial for further promoting the application of laser wakefield accelerators.
Collapse
|
5
|
High-charge electron beams from a laser-wakefield accelerator driven by a CO 2 laser. Sci Rep 2022; 12:6703. [PMID: 35585094 PMCID: PMC9117239 DOI: 10.1038/s41598-022-10160-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 04/04/2022] [Indexed: 11/08/2022] Open
Abstract
Laser-wakefield accelerators (LWFAs) driven by widely available 100s TW-class near-infrared laser systems have been shown to produce GeV-level electron beams with 10s-100s pC charge in centimetre-scale plasma. As the strength of the ponderomotive force is proportional to the square of the laser wavelength, more efficient LWFAs could be realised using longer wavelength lasers. Here we present a numerical study showing that [Formula: see text], sub-picosecond CO2 lasers with peak powers of 100-800 TW can produce high-charge electron beams, exceeding that possible from LWFAs driven by femtosecond near-infrared lasers by up to three orders of magnitude. Depending on the laser and plasma parameters, electron beams with 10s MeV to GeV energy and 1-100 nC charge can be generated in 10-200 mm long plasma or gas media without requiring external guiding. The laser-to-electron energy conversion efficiency can be up to 70% and currents of 100s kA are achievable. A CO2 laser driven LWFA could be useful for applications requiring compact and industrially robust accelerators and radiations sources.
Collapse
|
6
|
Cao Y, Hu LX, Hu YT, Zhao J, Zou DB, Yang XH, Zhang FP, Shao FQ, Yu TP. Direct acceleration of collimated monoenergetic sub-femtosecond electron bunches driven by a radially polarized laser pulse. OPTICS EXPRESS 2021; 29:30223-30236. [PMID: 34614749 DOI: 10.1364/oe.437827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 08/19/2021] [Indexed: 06/13/2023]
Abstract
High-quality ultrashort electron beams have diverse applications in a variety of areas, such as 4D electron diffraction and microscopy, relativistic electron mirrors and ultrashort radiation sources. Direct laser acceleration (DLA) mechanism can produce electron beams with a large amount of charge (several to hundreds of nC), but the generated electron beams usually have large divergence and wide energy spread. Here, we propose a novel DLA scheme to generate high-quality ultrashort electron beams by irradiating a radially polarized laser pulse on a nanofiber. Since electrons are continuously squeezed transversely by the inward radial electric field force, the divergence angle gradually decreases as electrons transport stably with the laser pulse. The well-collimated electron bunches are effectively accelerated by the circularly-symmetric longitudinal electric field and the relative energy spread also gradually decreases. It is demonstrated by three-dimensional (3D) simulations that collimated monoenergetic electron bunches with 0.75° center divergence angle and 14% energy spread can be generated. An analytical model of electron acceleration is presented which interprets well by the 3D simulation results.
Collapse
|
7
|
High-Density Dynamics of Laser Wakefield Acceleration from Gas Plasmas to Nanotubes. PHOTONICS 2021. [DOI: 10.3390/photonics8060216] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The electron dynamics of laser wakefield acceleration (LWFA) is examined in the high-density regime using particle-in-cell simulations. These simulations model the electron source as a target of carbon nanotubes. Carbon nanotubes readily allow access to near-critical densities and may have other advantageous properties for potential medical applications of electron acceleration. In the near-critical density regime, electrons are accelerated by the ponderomotive force followed by the electron sheath formation, resulting in a flow of bulk electrons. This behavior represents a qualitatively distinct regime from that of low-density LWFA. A quantitative entropy index for differentiating these regimes is proposed. The dependence of accelerated electron energy on laser amplitude is also examined. For the majority of this study, the laser propagates along the axis of the target of carbon nanotubes in a 1D geometry. After the fundamental high-density physics is established, an alternative, 2D scheme of laser acceleration of electrons using carbon nanotubes is considered.
Collapse
|
8
|
Ke LT, Feng K, Wang WT, Qin ZY, Yu CH, Wu Y, Chen Y, Qi R, Zhang ZJ, Xu Y, Yang XJ, Leng YX, Liu JS, Li RX, Xu ZZ. Near-GeV Electron Beams at a Few Per-Mille Level from a Laser Wakefield Accelerator via Density-Tailored Plasma. PHYSICAL REVIEW LETTERS 2021; 126:214801. [PMID: 34114880 DOI: 10.1103/physrevlett.126.214801] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 03/18/2021] [Accepted: 04/28/2021] [Indexed: 06/12/2023]
Abstract
A simple, efficient scheme was developed to obtain near-gigaelectronvolt electron beams with energy spreads of few per-mille level in a single-stage laser wakefield accelerator. Longitudinal plasma density was tailored to control relativistic laser-beam evolution, resulting in injection, dechirping, and a quasi-phase-stable acceleration. With this scheme, electron beams with peak energies of 780-840 MeV, rms energy spreads of 2.4‰-4.1‰, charges of 8.5-23.6 pC, and rms divergences of 0.1-0.4 mrad were experimentally obtained. Quasi-three-dimensional particle-in-cell simulations agreed well with the experimental results. The dechirping strength was estimated to reach up to 11 TeV/mm/m, which is higher than previously obtained results. Such high-quality electron beams will boost the development of compact intense coherent radiation sources and x-ray free-electron lasers.
Collapse
Affiliation(s)
- L T Ke
- State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - K Feng
- State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, China
| | - W T Wang
- State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, China
| | - Z Y Qin
- Department of Physics, Shanghai Normal University, Shanghai 200234, People's Republic of China
| | - C H Yu
- Department of Physics, Shanghai Normal University, Shanghai 200234, People's Republic of China
| | - Y Wu
- State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, China
| | - Y Chen
- State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, China
| | - R Qi
- State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, China
| | - Z J Zhang
- Department of Physics, Shanghai Normal University, Shanghai 200234, People's Republic of China
| | - Y Xu
- State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, China
| | - X J Yang
- State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, China
| | - Y X Leng
- State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, China
- School of Physical Science and Technology, Shanghai Tech University, Shanghai 200031, People's Republic of China
| | - J S Liu
- State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, China
- Department of Physics, Shanghai Normal University, Shanghai 200234, People's Republic of China
| | - R X Li
- State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
- School of Physical Science and Technology, Shanghai Tech University, Shanghai 200031, People's Republic of China
| | - Z Z Xu
- State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
- School of Physical Science and Technology, Shanghai Tech University, Shanghai 200031, People's Republic of China
| |
Collapse
|
9
|
Ferran Pousa A, Martinez de la Ossa A, Assmann RW. Intrinsic energy spread and bunch length growth in plasma-based accelerators due to betatron motion. Sci Rep 2019; 9:17690. [PMID: 31776391 PMCID: PMC6881450 DOI: 10.1038/s41598-019-53887-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2018] [Accepted: 10/28/2019] [Indexed: 11/19/2022] Open
Abstract
Plasma-based accelerators (PBAs), having demonstrated the production of GeV electron beams in only centimetre scales, offer a path towards a new generation of highly compact and cost-effective particle accelerators. However, achieving the required beam quality, particularly on the energy spread for applications such as free-electron lasers, remains a challenge. Here we investigate fundamental sources of energy spread and bunch length in PBAs which arise from the betatron motion of beam electrons. We present an analytical theory, validated against particle-in-cell simulations, which accurately describes these phenomena. Significant impact on the beam quality is predicted for certain configurations, explaining previously observed limitations on the achievable bunch length and energy spread. Guidelines for mitigating these contributions towards high-quality beams are deduced.
Collapse
Affiliation(s)
- Angel Ferran Pousa
- Deutsches Elektronen-Synchrotron DESY, Hamburg, 22607, Germany.
- Institut für Experimentalphysik, Universität Hamburg, Hamburg, 22761, Germany.
| | | | - Ralph W Assmann
- Deutsches Elektronen-Synchrotron DESY, Hamburg, 22607, Germany
| |
Collapse
|
10
|
Aniculaesei C, Pathak VB, Kim HT, Oh KH, Yoo BJ, Brunetti E, Jang YH, Hojbota CI, Shin JH, Jeon JH, Cho S, Cho MH, Sung JH, Lee SK, Hegelich BM, Nam CH. Electron energy increase in a laser wakefield accelerator using up-ramp plasma density profiles. Sci Rep 2019; 9:11249. [PMID: 31375722 PMCID: PMC6677811 DOI: 10.1038/s41598-019-47677-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Accepted: 07/08/2019] [Indexed: 11/30/2022] Open
Abstract
The phase velocity of the wakefield of a laser wakefield accelerator can, theoretically, be manipulated by shaping the longitudinal plasma density profile, thus controlling the parameters of the generated electron beam. We present an experimental method where using a series of shaped longitudinal plasma density profiles we increased the mean electron peak energy more than 50%, from 175 ± 1 MeV to 262 ± 10 MeV and the maximum peak energy from 182 MeV to 363 MeV. The divergence follows closely the change of mean energy and decreases from 58.9 ± 0.45 mrad to 12.6 ± 1.2 mrad along the horizontal axis and from 35 ± 0.3 mrad to 8.3 ± 0.69 mrad along the vertical axis. Particle-in-cell simulations show that a ramp in a plasma density profile can affect the evolution of the wakefield, thus qualitatively confirming the experimental results. The presented method can increase the electron energy for a fixed laser power and at the same time offer an energy tunable source of electrons.
Collapse
Affiliation(s)
- Constantin Aniculaesei
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea.
| | - Vishwa Bandhu Pathak
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea
| | - Hyung Taek Kim
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea. .,Advanced Photonics Research Institute, Gwangju Institute of Science and Technology (GIST), Gwangju, 61005, Republic of Korea.
| | - Kyung Hwan Oh
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea
| | - Byung Ju Yoo
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea
| | - Enrico Brunetti
- Scottish Universities Physics Alliance, University of Strathclyde, Department of Physics, Glasgow, G4 0NG, United Kingdom
| | - Yong Ha Jang
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea
| | - Calin Ioan Hojbota
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea.,Department of Physics and Photon Science, GIST, Gwangju, 61005, Republic of Korea
| | - Jung Hun Shin
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea
| | - Jong Ho Jeon
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea
| | - Seongha Cho
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea
| | - Myung Hoon Cho
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea
| | - Jae Hee Sung
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea.,Advanced Photonics Research Institute, Gwangju Institute of Science and Technology (GIST), Gwangju, 61005, Republic of Korea
| | - Seong Ku Lee
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea.,Advanced Photonics Research Institute, Gwangju Institute of Science and Technology (GIST), Gwangju, 61005, Republic of Korea
| | - Björn Manuel Hegelich
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea.,Department of Physics and Photon Science, GIST, Gwangju, 61005, Republic of Korea
| | - Chang Hee Nam
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea.,Department of Physics and Photon Science, GIST, Gwangju, 61005, Republic of Korea
| |
Collapse
|
11
|
Ferran Pousa A, Martinez de la Ossa A, Brinkmann R, Assmann RW. Compact Multistage Plasma-Based Accelerator Design for Correlated Energy Spread Compensation. PHYSICAL REVIEW LETTERS 2019; 123:054801. [PMID: 31491304 DOI: 10.1103/physrevlett.123.054801] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 06/10/2019] [Indexed: 06/10/2023]
Abstract
The extreme electromagnetic fields sustained by plasma-based accelerators could drastically reduce the size and cost of future accelerator facilities. However, they are also an inherent source of correlated energy spread in the produced beams, which severely limits the usability of these devices. We propose here to split the acceleration process into two plasma stages joined by a magnetic chicane in which the energy correlation induced in the first stage is inverted such that it can be naturally compensated in the second. Simulations of a particular 1.5-m-long setup show that 5.5 GeV beams with relative energy spreads of 1.2×10^{-3} (total) and 2.8×10^{-4} (slice) could be achieved while preserving a submicron emittance. This is at least one order of magnitude below the current state of the art and would enable applications such as compact free-electron lasers.
Collapse
Affiliation(s)
- A Ferran Pousa
- Deutsches Elektronen-Synchrotron DESY, 22607 Hamburg, Germany
- Institut für Experimentalphysik, Universität Hamburg, 22761 Hamburg, Germany
| | | | - R Brinkmann
- Deutsches Elektronen-Synchrotron DESY, 22607 Hamburg, Germany
| | - R W Assmann
- Deutsches Elektronen-Synchrotron DESY, 22607 Hamburg, Germany
| |
Collapse
|
12
|
Wen M, Salamin YI, Keitel CH. Electron acceleration by a radially-polarized laser pulse in a plasma micro-channel. OPTICS EXPRESS 2019; 27:557-566. [PMID: 30696140 DOI: 10.1364/oe.27.000557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Accepted: 11/21/2018] [Indexed: 06/09/2023]
Abstract
Encouraged by recent advances in radially-polarized laser technology, simulations have been performed of electron acceleration by a tightly-focused, ultra-short pulse in a parabolic plasma micro-channel. Milli-joule laser pulses, generated at kHz repetition rates, are shown to produce electron bunches of MeV energy, pC charge, low emittance and low divergence. The pivotal role played by the channel length in controlling the process is demonstrated, and the roles of direct and wakefield acceleration are distinguished.
Collapse
|