MeV-UED Call for Proposals for Run 4

By pjones
October 4, 2021

Call for Proposals - Run 4
SLAC Megaelectronvolt Ultrafast Electron Diffraction Instrument (MeV-UED) - SLAC National Accelerator Laboratory

Deadline: 4:00 p.m. Pacific Daylight Time (PDT) 24 November 2021
This call is for experiments to run from May 2022 through September 2022

Proposals for beam time for MeV-UED at SLAC National Accelerator Laboratory will be accepted via the web-based proposal system until 4:00 p.m. PST Wednesday, November 24, 2021. This call is for experiments to run from May through September 2022.

For full details of the call, please visit:

Since 2014, the SLAC UED instrument has been developing robust methods in the pursuit of time-resolved measurements to control and understand molecular structural dynamics and the coupling of electronic and nuclear motions in a variety of material and chemical systems. Leveraging these successes and taking advantage of recent system-level improvements in machine capability and reliability, we are pleased to announce MeV-UED’s fourth External User experimental time ("Run 4") in mid to late 2022. In Run 4, the MeV-UED instrument will offer only one experimental configuration; our recently upgraded gas-phase UED setup optimized to study nuclear and molecular dynamics. (see Endstations and Specifications).

Please note the following important information:
Virtual MeV-UED User Meeting will be held at 9am PST on Wednesday, October 27, 2021

A webcast meeting will be held to better inform the users about the developments at MeV-UED before the upcoming MeV-UED proposal deadline on November 24th. SLAC MeV-UED staff will inform the community about the latest capabilities and be available for Q & A. Information on how to connect can be found here.

Experimental stations available to users in Run 4:

For more general information about MeV-UED please visit

We look forward to seeing your proposals!

Many thanks,

Michael P. Minitti
Director, MeV-UED

Mike Dunne
Director, LCLS