MeV-UED Proposals
LCLS MeV-UED Facility Early Science with Liquid Phase Instrument
The LCLS MeV-UED team is continuing to develop and commission new capabilities. One such capability being developed is the MeV-UED liquid phase instrument [JPF Nunes et al., Struct. Dyn. 7, 024301 (2020)]. In August and September of 2024 there will be a further effort of technical commissioning, R&D, and ‘Early Science’ using this new instrument with the aim to develop it towards future user operations.
The ‘Early Science’ portion of this program is intended to be a set of pilot experiments (2-4) that bridge between technical commissioning and regular user operations. This effort will be organized and led by LCLS staff (from the MeV-UED team), but fully open to participation by interested members of the user community. If you are interested in participating in the liquid phase Early Science program at MeV-UED (or for further information) please send a brief letter of interest by June 22nd 2024 to:
Alexander Reid (alexhmr@slac.stanford.edu) LCLS MeV-UED Facility Director
With your letter of interest, we also welcome ideas and suggestions for Early Science experiments. Please note that all suggestions for Early Science experiments will be discussed and shared within the group of participants, the selection of ideas will be guided by the community of participants, and data will be available to the participants. The discussions about Early Science will take place in a series of meetings beginning in late June 2024.
Letters of interest are due by June 22nd 2024. The letter need only contain an affirmation of your interest in the early science program, whether or not you would like to propose an idea for early science and if you do, a sharable title of your idea.
Further details of the experimental parameters that will be available in the early science run are given below.
System | System Parameters Values | Additional Information |
Sample Delivery option 1: Converging nozzle sheet jet
| Flow rate: 2.7 mL/min Jet thickness: >= 250 nm Viscosity range (est.): <0.1 Poise (testing available)
| High working range of laser intensities Fewer icing issues Long lifetime |
Sample Delivery option 2: Gas-accelerated nozzle sheet jet | Flow rate: 0.2-0.3 mL/min Jet thickness: < 100 nm
| Icing issues Limited lifetime Low working range of laser intensities |
Sample Volume using recirculation | > 20 mL | Sample needs to be compatible with passivated steel pumps |
Samples | Pure water and other solvents | Solvated nanoparticles and high conc. dilute systems pending further tests and optimization |
Electron Beam | Beam energy: 2-4 MeV Rate: 360 Hz Beam size: 200 um | Maximum energy may be determined by klystron performance |
Laser Pumps | 800 nm (~ 8 mJ) 400 nm (~0.8 mJ) OPA 240 nm - 2.4 um Mid IR 3-12 um Spot size: 300 um FWHM | <75 fs pulse length for 800 nm and harmonics |
Detector | P43 phosphor screen and EMCCD |
LCLS MeV-UED Run 5 Call for Proposals
For period October 2024 to May 2025
Submission Deadline: 10th May 2024 (4pm PDT)
Please note that the run 5 proposal call is now closed. Thank you for your proposal submissions.
Acknowledgement: Proposal teams must inform and acknowledge MeV-UED and the DOE Office of Science in presentations and publications using this template:
"MeV-UED is operated as part of the Linac Coherent Light Source at the SLAC National Accelerator Laboratory, supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Contract No. DE-AC02-76SF00515"
