Proposals Overview

Proposals submitted to FACET-II are peer reviewed. The highest rated proposals are offered beam time based on availability and the scope of infrastructure changes required to support the experiment.

We are currently only calling for new proposals for FACET-II.

  • ​​Proposals are accepted any time of the year and will be reviewed at the next available program advisory committee meeting.
  • To submit a proposal, please use our template
  • To submit a proposal, follow up or ask questions about the process, please email .

We recommend that you check the beam parameters and infrastructure available at FACET-II as you consider your proposal.

FACET-II Beam Parameters

The first full year of User programs with 10 GeV compressed electron beams will begin in November 2021. Positron capabilities are being pursued as a future upgrade.

Electron Beam
Beam Type
Beam energy (GeV) 10
Repetition Rate (Hz)
Bunch Charge (nC)
Bunch Length (σ, µm)
Beam Spot size (σ, µm)
Experimental Laser
Pulse Energy on target at electron beamline (mJ)
Pulse Duration (fs)

To Submit a Proposal to FACET-II

  • Proposals should be approximately two-five pages long and use the provided template

See our proposal review process »

The FACET-II Plasma Wakefield Acceleration Program

FACET-II was designed to meet the Department of Energy Mission Need Statement for an Advanced Plasma Acceleration Facility. A key component of the experimental program at FACET-II, and approximately half of the beam time, is allocated to research in plasma wakefield acceleration. Topics include high-gradient electron acceleration with narrow energy spread and preserved emittance, efficiency, high-gradient positron acceleration and radiation generation. This program of FACET-II research is directed at understanding and establishing plasma wakefield acceleration as a viable particle acceleration technique. Researchers interested in plasma wakefield acceleration are encouraged to propose a multi-year program addressing the critical issues for this technology.

We specifically encourage the formation of a broad plasma wakefield collaboration to develop both individual research proposals and an overall strategic plan for demonstrating an understanding of this approach as a particle acceleration technique. Plasma experiments should still be proposed through the route outlined above with each experiment studying a distinct aspect. Though collaboration is naturally encouraged to share resources and expertise, we strongly welcome groups that have not yet been a part of the program at FACET-II.

To propose new experiments for our plasma program and to join our efforts to generate a coordinated approach to developing this technique, please contact , our Scientific Lead at FACET-II.

Staying in Touch

You can sign up for our mailing list to receive calls for proposals and announcements of meetings. To subscribe, send an email to . The subject doesn't matter, but the text should say subscribe facet-interest.​