Versions Compared

Old Version 4

changes.mady.by.user Gilliss Dyer

Saved on

compared with

New Version Current

changes.mady.by.user Gilliss Dyer

Saved on

Key

  • This line was added.
  • This line was removed.
  • Formatting was changed.

...

Attendees

Overview

Text in the excerpt box will show up in lists of meetings.

...

TimeItemWhoNotes
Walk-in

Experimental systems scope reduction considerationsEric M Galtier 
  • ES scope reduction is tough because the overall budget is less than 10% of the project

Laser systems considerations and changes

(ROD 23)

Design is going to preclude the second petawatt as an upgrade option if DMPL is realized.

RRLP will not be precluded

  • Pointing stability: strictest test right now is based on hitting the target depicted in the first flagship. 20 µm cryo jet with a 5µm FWHM focal spot: Just hit the inner 10 µm of the target with the whole 5 µm.
    • The above description says a successful shot is at least at the 50% intensity point in the beam.
    • Likely this gets to about 10% with realistic design.
    • Noted that a good diagnostic analyzing in what way the spot is off alignment is important.
    • Want to answer: The flagship needs ____ shots in an experiment / run.
    • Given that we understand good vs bad shots a factor of 2 should not be a concern.

Measurement innovation workshop commentsLuke B. Fletcher Session: presented MEC-U at the end. Seemed to go well. Comments had curiosity about kJ shot rate. Diagnostic development and challenges associated. What needs to be developed for AI feedback loops? ← putting it all together is the main challenge. There is work on this with LCLS, and we have the advantage of having the data handling capacity

UAP update
Rick Kraus, now at UNR, will be our new chair. Working next week to spin back up the UAP, including drop offs and new members.

Science below objective KPPs (flagship implications)

Short pulse threshold 30J in 300 fs consider, say 50J at 200 fs: 3x less energy, 4x less intensity

  • Collisionless shocks: this experiment assumed a 5.2µm FWHM Gaussian; the 1/e2 radius is .85 of that, or 4.42. 25% intensity is somewhere between 4.4µm and 3.2µm out;
    • There is a bit of an intensity threshold. Somewhat hard to tell from the simulation, which hits a cylindrical target with a gaussian.
  • Ion stopping power expeirments
    • Probably similar conversion efficiency in the lower energy ions but 1/3 as many. Experiment could still be done.
  • Radiation damage cascades
    • Already a stretch for estimates of optimized beams. Certainly harder to imagine the neutron damage version of this experiment
  • Demixing / IXS experiments (HRR LP)


HELP - 100 J in 10 ns as threshold: consider that we probably hit at 300 J without much effort.


Rep rate threshold of 1 Hz:

  • Now we're talking about a 1/10 reduction in hit rate, all else being equal - affects experiments needing accumulation.
    • Collisionless shocks -



Experiments for project completion, day 1, year 2, and year 5 descriptions

Consider the example of MEC's commissioning / early science as a baseline. Eric M Galtier  or Bob Nagler can review.

  • notes that it was PRP driven from the outset.

Could also look to the XFEL example.

Action items

  •  Type your task here, using "@" to assign to a user and "//" to select a due date