skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Energy Doubling of 42 GeV Electrons in a Meter-scale Plasma Wakefield Accelerator

Abstract

The energy frontier of particle physics is several trillion electron volts, but colliders capable of reaching this regime (such as the Large Hadron Collider and the International Linear Collider) are costly and time-consuming to build; it is therefore important to explore new methods of accelerating particles to high energies. Plasma-based accelerators are particularly attractive because they are capable of producing accelerating fields that are orders of magnitude larger than those used in conventional colliders. In these accelerators, a drive beam (either laser or particle) produces a plasma wave (wakefield) that accelerates charged particles. The ultimate utility of plasma accelerators will depend on sustaining ultrahigh accelerating fields over a substantial length to achieve a significant energy gain. Here we show that an energy gain of more than 42 GeV is achieved in a plasma wakefield accelerator of 85 cm length, driven by a 42 GeV electron beam at the Stanford Linear Accelerator Center (SLAC). The results are in excellent agreement with the predictions of three-dimensional particle-in-cell simulations. Most of the beam electrons lose energy to the plasma wave, but some electrons in the back of the same beam pulse are accelerated with a field of {approx} 52GV m{sup -1}. This effectivelymore » doubles their energy, producing the energy gain of the 3-km-long SLAC accelerator in less than a meter for a small fraction of the electrons in the injected bunch. This is an important step towards demonstrating the viability of plasma accelerators for high-energy physics applications.« less

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Stanford Linear Accelerator Center (SLAC)
Sponsoring Org.:
USDOE
OSTI Identifier:
901007
Report Number(s):
SLAC-PUB-12363
TRN: US0702434
DOE Contract Number:
AC02-76SF00515
Resource Type:
Journal Article
Resource Relation:
Journal Name: Nature 445:741-744,2007; Journal Volume: 445
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ACCELERATORS; CHARGED PARTICLES; ELECTRON BEAMS; ELECTRONS; HADRONS; LASERS; LINEAR COLLIDERS; METERS; PHYSICS; PLASMA; PLASMA GUNS; PLASMA WAVES; STANFORD LINEAR ACCELERATOR CENTER; VIABILITY; WAKEFIELD ACCELERATORS; Accelerators,ACCPHY, PHYS

Citation Formats

Blumenfeld, Ian, Clayton, Christopher E., Decker, Franz-Josef, Hogan, Mark J., Huang, Chengkun, Ischebeck, Rasmus, Iverson, Richard, Joshi, Chandrashekhar, Katsouleas, Thomas, Kirby, Neil, Lu, Wei, Marsh, Kenneth A., Mori, Warren B., Muggli, Patric, Oz, Erdem, Siemann, Robert H., Walz, Dieter, Zhou, Miaomiao, and /SLAC /UCLA /Southern California U. Energy Doubling of 42 GeV Electrons in a Meter-scale Plasma Wakefield Accelerator. United States: N. p., 2007. Web.
Blumenfeld, Ian, Clayton, Christopher E., Decker, Franz-Josef, Hogan, Mark J., Huang, Chengkun, Ischebeck, Rasmus, Iverson, Richard, Joshi, Chandrashekhar, Katsouleas, Thomas, Kirby, Neil, Lu, Wei, Marsh, Kenneth A., Mori, Warren B., Muggli, Patric, Oz, Erdem, Siemann, Robert H., Walz, Dieter, Zhou, Miaomiao, & /SLAC /UCLA /Southern California U. Energy Doubling of 42 GeV Electrons in a Meter-scale Plasma Wakefield Accelerator. United States.
Blumenfeld, Ian, Clayton, Christopher E., Decker, Franz-Josef, Hogan, Mark J., Huang, Chengkun, Ischebeck, Rasmus, Iverson, Richard, Joshi, Chandrashekhar, Katsouleas, Thomas, Kirby, Neil, Lu, Wei, Marsh, Kenneth A., Mori, Warren B., Muggli, Patric, Oz, Erdem, Siemann, Robert H., Walz, Dieter, Zhou, Miaomiao, and /SLAC /UCLA /Southern California U. Wed . "Energy Doubling of 42 GeV Electrons in a Meter-scale Plasma Wakefield Accelerator". United States. doi:. https://www.osti.gov/servlets/purl/901007.
@article{osti_901007,
title = {Energy Doubling of 42 GeV Electrons in a Meter-scale Plasma Wakefield Accelerator},
author = {Blumenfeld, Ian and Clayton, Christopher E. and Decker, Franz-Josef and Hogan, Mark J. and Huang, Chengkun and Ischebeck, Rasmus and Iverson, Richard and Joshi, Chandrashekhar and Katsouleas, Thomas and Kirby, Neil and Lu, Wei and Marsh, Kenneth A. and Mori, Warren B. and Muggli, Patric and Oz, Erdem and Siemann, Robert H. and Walz, Dieter and Zhou, Miaomiao and /SLAC /UCLA /Southern California U.},
abstractNote = {The energy frontier of particle physics is several trillion electron volts, but colliders capable of reaching this regime (such as the Large Hadron Collider and the International Linear Collider) are costly and time-consuming to build; it is therefore important to explore new methods of accelerating particles to high energies. Plasma-based accelerators are particularly attractive because they are capable of producing accelerating fields that are orders of magnitude larger than those used in conventional colliders. In these accelerators, a drive beam (either laser or particle) produces a plasma wave (wakefield) that accelerates charged particles. The ultimate utility of plasma accelerators will depend on sustaining ultrahigh accelerating fields over a substantial length to achieve a significant energy gain. Here we show that an energy gain of more than 42 GeV is achieved in a plasma wakefield accelerator of 85 cm length, driven by a 42 GeV electron beam at the Stanford Linear Accelerator Center (SLAC). The results are in excellent agreement with the predictions of three-dimensional particle-in-cell simulations. Most of the beam electrons lose energy to the plasma wave, but some electrons in the back of the same beam pulse are accelerated with a field of {approx} 52GV m{sup -1}. This effectively doubles their energy, producing the energy gain of the 3-km-long SLAC accelerator in less than a meter for a small fraction of the electrons in the injected bunch. This is an important step towards demonstrating the viability of plasma accelerators for high-energy physics applications.},
doi = {},
journal = {Nature 445:741-744,2007},
number = ,
volume = 445,
place = {United States},
year = {Wed Mar 14 00:00:00 EDT 2007},
month = {Wed Mar 14 00:00:00 EDT 2007}
}
  • An ultracompact laser-plasma-generated, fs-scale electron double bunch system can be injected into a high-density driver/witness-type plasma wakefield accelerator afterburner stage to boost the witness electrons monoenergetically to energies far beyond twice their initial energy on the GeV scale. The combination of conservation of monoenergetic phase-space structure and fs duration with radial electric plasma fields E{sub r{approx}}100 GV/m leads to dramatic transversal witness compression and unprecedented charge densities. It seems feasible to upscale and implement the scheme to future accelerator systems.
  • Plasma wakefield accelerators (PWFA) have recently shown substantial progress, attaining accelerating fields of more than 30 GV/m. The goal of the present experiment is to show that such accelerating fields can be sustained over the scale of a meter, resulting in a total energy gain comparable to the entire SLAC linear accelerator. We also seek to determine which factors limit the length of the interaction and determine the maximum achievable energy.
  • Multi-GeV trapped electron bunches in a plasma wakefield accelerator (PWFA) are observed with normalized transverse emittance divided by peak current, {epsilon}{sub N,x}/I{sub t}, below the level of 0.2 {micro}m/kA. A theoretical model of the trapped electron emittance, developed here, indicates that emittance scales inversely with the square root of the plasma density in the nonlinear 'bubble' regime of the PWFA. This model and simulations indicate that the observed values of {epsilon}{sub N,x}/I{sub t} result from multi-GeV trapped electron bunches with emittances of a few {micro}m and multi-kA peak currents.