A5080993956- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Laser-Plasma Interactions and Diagnostics
- Magnetic confinement fusion research
- Particle Detector Development and Performance
- Superconducting Materials and Applications
- Gyrotron and Vacuum Electronics Research
- Plasma Diagnostics and Applications
- Atomic and Molecular Physics
- Pulsed Power Technology Applications
- Nuclear Physics and Applications
- Laser-induced spectroscopy and plasma
- Particle physics theoretical and experimental studies
- Radiation Therapy and Dosimetry
- Ion-surface interactions and analysis
- Radiation Detection and Scintillator Technologies
- Solar and Space Plasma Dynamics
- Electron and X-Ray Spectroscopy Techniques
- Laser-Matter Interactions and Applications
- Ionosphere and magnetosphere dynamics
- Advanced X-ray Imaging Techniques
- Photocathodes and Microchannel Plates
- X-ray Spectroscopy and Fluorescence Analysis
- Terahertz technology and applications
- Dust and Plasma Wave Phenomena
University of Oslo
2015-2024
European Organization for Nuclear Research
2006-2022
Ulsan National Institute of Science and Technology
2021
Campbell Collaboration
2020
Stony Brook University
2019
Google (United States)
2019
SLAC National Accelerator Laboratory
2012-2016
Oslo University Hospital
2014
Menlo School
2012-2013
UCLA Health
2013
High energy particle accelerators have been crucial in providing a deeper understanding of fundamental particles and the forces that govern their interactions. In order to increase or reduce size accelerator, new acceleration schemes need be developed. Plasma wakefield acceleration, which electrons plasma are excited, leading strong electric fields, is one such promising novel technique. Pioneering experiments shown an intense laser pulse electron bunch traversing plasma, drives fields 10s...
Abstract Plasma wakefield accelerators have been used to accelerate electron and positron particle beams with gradients that are orders of magnitude larger than those achieved in conventional accelerators. In addition being accelerated by the plasma wakefield, beam particles also experience strong transverse forces may disrupt quality. Hollow channels proposed as a technique for generating accelerating fields without forces. Here we demonstrate method creating an extended hollow channel...
The Advanced Proton Driven Plasma Wakefield Acceleration Experiment (AWAKE) aims at studying plasma wakefield generation and electron acceleration driven by proton bunches. It is a proof-of-principle R&D experiment CERN the world׳s first experiment. AWAKE will be installed in former CNGS facility uses 400 GeV/c beam bunches from SPS. experiments focus on self-modulation instability of long (rms ~12 cm) bunch plasma. These are planned for end 2016. Later, 2017/2018, low energy (~15 MeV)...
During the past two decades of research, ultra-relativistic beam-driven plasma wakefield accelerator (PWFA) concept has achieved many significant milestones. These include demonstration ultra-high gradient acceleration electrons over meter-scale structures, efficient a narrow energy spread electron bunch at high-gradients, positron using wakes in uniform plasmas and hollow channels, demonstrating that highly nonlinear 'blow-out regime' have electric field structure necessary for preserving...
We give direct experimental evidence for the observation of full transverse self-modulation a long, relativistic proton bunch propagating through dense plasma. The exits plasma with periodic density modulation resulting from radial wakefield effects. show that is seeded by ionization front created using an intense laser pulse copropagating bunch. extends over length following seed point. By varying one order magnitude, we frequency scales expected dependence on density, i.e., it equal to...
Active plasma lensing is a compact technology for strong focusing of charged particle beams, which has gained considerable interest use in novel accelerator schemes. While providing $\mathrm{kT}/\mathrm{m}$ gradients, active lenses can have aberrations caused by radially nonuniform temperature profile, leading to degradation the beam quality. We present first direct measurement this aberration, consistent with theory, and show that it be fully suppressed changing from light gas species...
The seeded self-modulation of a relativistic, charged particle bunch in plasma is shown to grow both along the and plasma, resulting transverse wakefield amplitudes that far exceed initial seed values.
Abstract CompactLight is a Design Study funded by the European Union under Horizon 2020 research and innovation funding programme, with Grant Agreement No. 777431. was conducted an International Collaboration of 23 international laboratories academic institutions, three private companies, five third parties. The project, which started in January 2018 duration 48 months, aimed to design innovative, compact, cost-effective hard X-ray FEL facility complemented soft source pave road for future...
Plasma acceleration has emerged as a promising technology for future particle accelerators, particularly linear colliders. Significant progress been made in recent decades toward high-efficiency and high-quality of electrons plasmas. However, this does not generalize to positrons, plasmas are inherently charge asymmetric. Here, we present comprehensive review historical current efforts accelerate positrons using plasma wakefields. Proposed schemes that aim increase the energy efficiency beam...
AWAKE is a proton-driven plasma wakefield acceleration experiment. % We show that the experimental setup briefly described here ready for systematic study of seeded self-modulation 400\,GeV proton bunch in 10\,m-long rubidium with density adjustable from 1 to 10$\times10^{14}$\,cm$^{-3}$. short laser pulse used ionization vapor propagates all way along column, suggesting full vapor. occurs bunch, at time and follows affects bunch.
The HALHF collaboration has discussed a new baseline for the project, taking into account comments from accelerator community on various aspects of original design. In particular, these concerned practicality dual-purpose linac to accelerate both colliding positron bunches and drive beams required plasma linac. addition, many other project were also considered; discussion conclusions are documented in this paper. Finally, is outlined that been optimised addresses several weaknesses design,...
An electron beam has gained a maximum energy of 9 GeV per particle in 1.3 m-long beam-driven plasma wakefield accelerator. The amount charge accelerated the spectral peak was 28.3 pC, and root-mean-square spread 5.0%. mean gain 215 shot data set 115 pC 5.3 GeV, respectively, corresponding to an acceleration gradient 4.0 GeV/m at peak. 5.1%. These results are consistent with extrapolation previously reported using shorter, 36 cm-long source within 10%, evincing non-evolving wake structure...
The conversion of the CALIFES beamline CTF3 into “CERN Linear Electron Accelerator for Research” (CLEAR) facility was approved in December 2016. primary focus CLEAR is general accelerator R&D and component studies existing possible future applications. This includes high gradient acceleration methods, e.g. CLIC plasma technology, prototyping validation components, HL-LHC upgrade. also provides irradiation test capabilities characterisation electronic components medical A description with...
We investigate beam loading and emittance preservation for a high-charge electron being accelerated in quasilinear plasma wakefields driven by short proton beam. The structure of the studied are similar to those long, modulated beam, such as AWAKE driver. show that properly choosing parameters exploiting two well known effects, wakefield full blow out electrons can gain large amounts energy with narrow final spread (%-level) without significant growth.
High gradients of energy gain and high efficiency are necessary parameters for compact, cost-efficient high-energy particle colliders. Plasma Wakefield Accelerators (PWFA) offer both, making them attractive candidates next-generation In these devices, a charge-density plasma wave is excited by an ultra-relativistic bunch charged particles (the drive bunch). The in the can be extracted second trailing bunch), as this propagates wake bunch. While electron was accelerated with more than...
The Facility for Advanced Accelerator and Experimental Tests (FACET) at SLAC installed a 10-TW Ti : sapphire laser system pre-ionized plasma wakefield acceleration experiments. High energy (500 mJ), short (50 fs) pulses of 800 nm light 1 Hz are used the FACET experimental area to produce column. stretched 250 fs before injection into vapor cell, where is focused by an axicon lens form column that can be sustained over desired radius length. A 20 GeV electron bunch interacts with this...
We present a laser-ionized, beam-driven, passive thin plasma lens that operates in the nonlinear blowout regime. This provides axisymmetric focusing for relativistic electron beams at strengths unobtainable by magnetic devices. It is tunable, compact, and it imparts little to no spherical aberrations. The combination of these features make more attractive than other types lenses highly divergent beams. A case study built on beam matching into wakefield accelerator SLAC National Accelerator...
Chromatic errors are normally corrected using sextupoles in regions of large dispersion. In low emittance linear accelerators, use can be challenging. Apochromatic focusing is a lesser-known alternative approach, whereby chromatic Twiss parameters without the sextupoles, and has consequently been subject to renewed interest advanced accelerator research. Proof principle designs were first established by Montague Ruggiero developed more recently Balandin et al. We describe general method for...