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

Title: Single-stage plasma-based correlated energy spread compensation for ultrahigh 6D brightness electron beams

Abstract

Plasma photocathode wakefield acceleration combines energy gains of tens of GeV m –1 with generation of ultralow emittance electron bunches, and opens a path towards 5D-brightness orders of magnitude larger than state-of-the-art. This holds great promise for compact accelerator building blocks and advanced light sources. However, an intrinsic by-product of the enormous electric field gradients inherent to plasma accelerators is substantial correlated energy spread—an obstacle for key applications such as free-electron-lasers. Here we show that by releasing an additional tailored escort electron beam at a later phase of the acceleration, when the witness bunch is relativistically stable, the plasma wave can be locally overloaded without compromising the witness bunch normalized emittance. Here, this reverses the effective accelerating gradient, and counter-rotates the accumulated negative longitudinal phase space chirp of the witness bunch. Thereby, the energy spread is reduced by an order of magnitude, thus enabling the production of ultrahigh 6D-brightness beams.

Authors:
 [1];  [2]; ORCiD logo [1]; ORCiD logo [1];  [1];  [3];  [3];  [3];  [4];  [5]; ORCiD logo [6];  [7];  [8];  [1]
  1. Univ. of Strathclyde, Glasgow (United Kingdom); Cockcroft Institute, Cheshire (United Kingdom)
  2. Univ. of Strathclyde, Glasgow (United Kingdom); Cockcroft Institute, Cheshire (United Kingdom); Univ. of Hamburg, Hamburg (Germany)
  3. Univ. of Hamburg, Hamburg (Germany)
  4. Univ. of Strathclyde, Glasgow (United Kingdom); Cockcroft Institute, Cheshire (United Kingdom); Univ. of Hamburg, Hamburg (Germany); Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
  5. Univ. of Strathclyde, Glasgow (United Kingdom); Cockcroft Institute, Cheshire (United Kingdom); Shanghai Jiao Tong Univ., Shanghai (China)
  6. Univ. of Colorado and Tech-X Corp., Boulder, CO (United States)
  7. RadiaSoft, Boulder, CO (United States)
  8. Univ. of California, Los Angeles, CA (United States)
Publication Date:
Research Org.:
RadiaSoft, Boulder, CO (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1389836
Grant/Contract Number:
AC02-05CH11231
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 8; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; Plasma-based accelerators; X-rays

Citation Formats

Manahan, Grace G., Habib, A. F., Scherkl, P., Delinikolas, P., Beaton, A., Knetsch, A., Karger, O., Wittig, G., Heinemann, T., Sheng, Z. M., Cary, J. R., Bruhwiler, D. L., Rosenzweig, J. B., and Hidding, Bernhard. Single-stage plasma-based correlated energy spread compensation for ultrahigh 6D brightness electron beams. United States: N. p., 2017. Web. doi:10.1038/ncomms15705.
Manahan, Grace G., Habib, A. F., Scherkl, P., Delinikolas, P., Beaton, A., Knetsch, A., Karger, O., Wittig, G., Heinemann, T., Sheng, Z. M., Cary, J. R., Bruhwiler, D. L., Rosenzweig, J. B., & Hidding, Bernhard. Single-stage plasma-based correlated energy spread compensation for ultrahigh 6D brightness electron beams. United States. doi:10.1038/ncomms15705.
Manahan, Grace G., Habib, A. F., Scherkl, P., Delinikolas, P., Beaton, A., Knetsch, A., Karger, O., Wittig, G., Heinemann, T., Sheng, Z. M., Cary, J. R., Bruhwiler, D. L., Rosenzweig, J. B., and Hidding, Bernhard. Mon . "Single-stage plasma-based correlated energy spread compensation for ultrahigh 6D brightness electron beams". United States. doi:10.1038/ncomms15705. https://www.osti.gov/servlets/purl/1389836.
@article{osti_1389836,
title = {Single-stage plasma-based correlated energy spread compensation for ultrahigh 6D brightness electron beams},
author = {Manahan, Grace G. and Habib, A. F. and Scherkl, P. and Delinikolas, P. and Beaton, A. and Knetsch, A. and Karger, O. and Wittig, G. and Heinemann, T. and Sheng, Z. M. and Cary, J. R. and Bruhwiler, D. L. and Rosenzweig, J. B. and Hidding, Bernhard},
abstractNote = {Plasma photocathode wakefield acceleration combines energy gains of tens of GeV m–1 with generation of ultralow emittance electron bunches, and opens a path towards 5D-brightness orders of magnitude larger than state-of-the-art. This holds great promise for compact accelerator building blocks and advanced light sources. However, an intrinsic by-product of the enormous electric field gradients inherent to plasma accelerators is substantial correlated energy spread—an obstacle for key applications such as free-electron-lasers. Here we show that by releasing an additional tailored escort electron beam at a later phase of the acceleration, when the witness bunch is relativistically stable, the plasma wave can be locally overloaded without compromising the witness bunch normalized emittance. Here, this reverses the effective accelerating gradient, and counter-rotates the accumulated negative longitudinal phase space chirp of the witness bunch. Thereby, the energy spread is reduced by an order of magnitude, thus enabling the production of ultrahigh 6D-brightness beams.},
doi = {10.1038/ncomms15705},
journal = {Nature Communications},
number = ,
volume = 8,
place = {United States},
year = {Mon Jun 05 00:00:00 EDT 2017},
month = {Mon Jun 05 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Save / Share:
  • In this paper a new method of determining the energy spread of a relativistic electron beam from a laser-driven plasma wakefield accelerator by measuring radiation from an undulator is presented. This could be used to determine the beam characteristics of multi-GeV accelerators where conventional spectrometers are very large and cumbersome. Simultaneous measurement of the energy spectra of electrons from the wakefield accelerator in the 55-70 MeV range and the radiation spectra in the wavelength range of 700-900 nm of synchrotron radiation emitted from a 50 period undulator confirm a narrow energy spread for electrons accelerated over the dephasing distance wheremore » beam loading leads to energy compression. Measured energy spreads of less than 1% indicates the potential of using a wakefield accelerator as a driver of future compact and brilliant ultrashort pulse synchrotron sources and free-electron lasers that require high peak brightness beams.« less
  • The possibility of obtaining high-energy electron beams of high quality by using a low-density homogeneous plasma and a low-intensity laser (just above the self-injection threshold in the bubble regime) has been explored. Three-dimensional simulations are used to demonstrate, for the first time, an energy-spread of less than 1%, from self-trapping. More specifically, for a plasma density of 2x10{sup 18} cm{sup -3} and a laser intensity of a{sub 0}=2, a high-energy (0.55 GeV), ultrashort (1.4 fs) electron beam with very low energy-spread (0.55%) and high current (3 kA) is obtained. These parameters satisfy the requirements for drivers of short-wavelength free-electron lasers.more » It is also found that the quality of the electron beam depends strongly on the plasma length, which therefore needs to be optimized carefully to get the best performance in the experiments.« less
  • We have obtained estimates of plasma potentials and energy spreads characterizing an electron cyclotron resonance ion source plasma under different source conditions. Our estimates are obtained from analysis of ion beams extracted from the ion source at 10 kV that are subsequently decelerated into a floating surface scattering chamber where their current intensity incident on a solid sample is measured as function of retardation voltage. The deceleration occurs outside the measurement chamber, permitting beam current measurements in a field-free region. Absence of grids in the deceleration section avoids potential issues of field penetration. The behavior of our deceleration optics wasmore » modeled with SIMION. The simulation indicated a linear beam attenuation dependence close to full retardation where the beam current goes to zero. Deviations from this linear dependence observed close to zero beam energy give information on the initial energy spread of the ions extracted from the source. Our decelerated beams measurements are compared with recent in situ probe results and external beams results based on magnetic analysis.« less