Time | Item | Who | Notes |
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| Walk-in | | |
| Experimental systems scope reduction considerations | Eric M Galtier | - ES scope reduction is tough because the overall budget is less than 10% of the project
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| 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.
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| Measurement innovation workshop comments | Luke 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
- 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.
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| Experiments for project completion, day 1, year 2, and year 5 descriptions |
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