- CXI - Coherent X-ray Imaging
- MEC - Matter in Extreme Conditions
- MFX - Macromolecular Femtosecond Crystallography
- XCS - X-ray Correlation Spectroscopy
- XPP - X-ray Pump Probe
- SLAC MeV-UED
- LCLS-II Instruments (L2SI)
- NEH 1.1. or TMO - Time-resolved AMO
- NEH 1.2 or Tender X-ray Instrument (TXI)
- NEH 2.2
- Instrument Maps
- Standard Configurations
Latest Proposal Schedule
|Mode of Access||Run Cycle||Proposal Call Status||Deadline||Cycle Begins||Cycle Ends|
|Scientific Campaign Proposal||LCLS 19||Submitted Proposals under review||28 Oct 2020||Apr 2021||Oct 2021|
|Regular User Proposal||LCLS 19||Submitted Proposals under review||28 Oct 2020||Apr 2021||Oct 2021|
|MeV-UED Regular User Proposal||UED 3||Accepting Proposal Submissions||14 Dec 2020||May 2021||Sep 2021|
|Protein Crystal Screening (PCS)
|LCLS 19||Call for proposals to be announced||26 Jan 2021||Apr 2021||Oct 2021|
|Rapid Access (CXI, MFX)||Contact for details||Ongoing|
Proposals are submitted through the User Portal.
Call for Proposals
LCLS is pleased to announce MeV-UED’s third external user experimental run in mid 2021. SLAC MeV-UED will offer two chambers for solid-state experiments in Run 3. The first chamber is the Cryo and Quantum Materials Chamber, optimized for room temperature (RT) and below RT experiments with an tunable optical pump. The second chamber is the Single-Shot and High Temperature Chamber which can be configured into several different modes allowing greater experimental flexibility.
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 reliability, we are pleased to announce MeV-UED’s third External User experimental time ("Run 3") in mid to late 2021. In Run 3, the MeV-UED instrument will offer two experimental configurations; a recently upgraded materials and single-shot setup. (see Endstations and Specifications).
Please note the following important information:
Virtual MeV-UED User Meeting will be held at 9am PST on Thursday, November 12, 2020
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 December 14th. 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 3:
- Solid State (Materials) & Warm Dense Matter (Single Shot) Endstation - See Endstations for details
- Solid State Materials (SSM):
Alex Reid (email@example.com),
Xiaozhe Shen (firstname.lastname@example.org),
Fuhao Ji (email@example.com)
- Warm Dense Matter (WDM):
Alex Reid (firstname.lastname@example.org)
Mianzhen Mo (email@example.com)
For more general information about MeV-UED.
Submitting MeV-UED Proposals
The MeV-UED instrument, part of the Linac Coherent Light Source user facility at SLAC National Accelerator Laboratory encourages scientists from diverse fields to propose experiments utilizing the MeV-UED's unique capabilities. Access to MeV-UED is open to the international community. There is no cost to submit proposals or conduct experiments at MeV-UED. However, users are responsible for their own travel expenses and (in rare cases) for any extraordinary consumables required by the experiment.
We recommend that scientists describe well-posed experiments that can be accomplished within 96 hours of beam time. Proposals must include brief discussions of the expected scientific or technological impact and anticipated feasibility and probability of success of experiments.
Each proposal is for one specific experiment. Proposals can be re-submitted at each call, but this will not happen automatically and a re-submission will not receive preference during the review process. There is no limit to the number of proposals that can be submitted by a scientist or team, but multiple similar proposals from the same team members may not be reviewed favorably by the Proposal Review Panel (PRP).
Proposals may be made in the context of a larger scope than can be covered in a single experiment. All proposals, even these broader proposals that address important problems, must be resubmitted each cycle in order to be peer reviewed and considered for beam time. However, in the absence of sufficient information to evaluate progress (data disseminated from previous beam time, publications, etc.), the PRP may recommend or MeV-UED may decide that some proposal(s) be postponed for consideration until a future review cycle.
Required Content for Your Proposal
Provide a descriptive title of your proposed experiment that you would be willing to be made public if awarded beam time.
Provide an abstract that concisely (less than 1,950 characters) summarizes the proposed experiment, quantities to be measured, samples to be studied, expected scientific results and impact. The more detailed proposal text is limited to 4 pages in PDF format. Proposals should include the following information (include the spokesperson's name in the upper right-hand corner of each page):
Experimental Team: In a table, list the names, institution, email address of PIs and collaborators who would participate in the proposed experiment (e.g., sample prep, theory, data collection, data analysis). This section could also briefly mention directly-relevant previous work done by the team members.
Scientific Case: Briefly explain the background and significance of your experiment. In particular, why is MeV-UED required for this experiment? Itemize the specific aims and particular questions you want to answer. Focus on the specific experiment and avoid broad discussions in general terms.
Experimental Procedure: Provide specific information so that the feasibility of this experiment at the requested MeV-UED instrument can be evaluated. Tell us if you plan or have carried out supporting experiments at other facilities. Have simulations of the experiment been performed? What are the anticipated data rates? Provide a beam time plan, indicating what could be accomplished shift by shift. Describe any additional equipment you plan to bring to MeV-UED for the experiment.
We strongly recommend that you contact the MeV-UED instrument scientist(s) before proposal submission to discuss capabilities, to identify possible problems in integrating external equipment with the MeV-UED instrument and to determine possible solutions.
Technical Feasibility: Proposals must contain sufficient information for the MeV-UED instrument staff to review the proposal for technical feasibility. This information should include:
- Which elements of the proposed instrument do you require for the proposal?
- What additional equipment is needed, including laser, detector, sample delivery/environment, temperature, pressure, etc?
- How do you plan to provide/organize the additional equipment?
- Describe electron beam energy, pulse energy, beam size, repetition rate, and pulse duration
- If an optical laser is required, describe laser wavelength, pulse energy, bandwidth, beam size, repetition rate, pulse duration, timing, geometry.
- Experimental protocol
- Describe the experimental geometry.
- Calculate the expected signal rate/background.
- Describe samples and concentrations, sample preparation and storage.
- Describe local facilities that may be required.
As part of the proposal process, we will contact the Spokesperson for proposals that have the potential of being awarded beamtime. The Spokesperson will be asked to provide specific experimental parameters to help inform the viability and schedule.
Material samples must be provided to the facility at least one month in advance of the scheduled beamtime date for a pre-beamtime screening to verify the sample response to the requested experimental beam parameters.
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"