XAPPER Update. Presented by: Jeff Latkowski XAPPER Team: Ryan Abbott, Brad Bell, and Keith Kanz Special thanks to: Stan Ault HAPL Program Workshop Oak Ridge National Laboratory March 21-22, 2006 UCRL-219931-PRES
Presented by: Jeff Latkowski
XAPPER Team: Ryan Abbott, Brad Bell, and Keith Kanz Special thanks to: Stan Ault
HAPL Program Workshop
Oak Ridge National Laboratory
March 21-22, 2006
Work performed under the auspices of the U. S. Department of Energy byLawrence Livermore National Laboratory under Contract W-7405-Eng-48.
Movie shows field of view with old thermometer head
All of these options assume that we have a good signal that gets drowned out by reflected pinch light. Instead, we see nothing until the material damages. Suppressing the pinch light won’t fix the underlying problem.
10-9 10-7 10-5 10-3 10-1Original thermometer, (Cont'd.)
F1 = 62mm /F2 = 62mm /F3 = -35mm
EFL2-3 = 270mm
Wavelengths of ~0.5, 1.0, 1.5, 2.0, 2.5, 3.5 mm planned. Exact l's TBD pending availability of dichroics and other optics.
LIDT data for Al GIMMs at 4w (Mark Tillack, UCSD)
The meaning of “damage” and “reliability”require more formal and consistentdefinitions for 109 shot systems
What does a 109 shot reliability mean for optics?
- Extremely low probability of initiation allowed
- Margin of safety defined
We are developing detailed modelsthat consider availability and reliabilityover the lifetime of an IFE plant
Max of N analysis indicates small change in fluence for a large numbers of shots
geometries influence availability
We think it’s time to gather the “optics” folks and form a
working group to exchange ideas and establish similar IFE reliability protocols for testing and analysis
Example of a crazy optical system to exercise several XMC features
These images look very similar to what we actually see on our CCD. This gives us confidence that the code is working properly.
Photo credit: Ryan Abbott
Pilot: Jeff Latkowski
62mm and150mm lenses
XAPPER is looking for “sub-threshold” (e.g., without melting or ablation) effects such as roughening and thermomechanical fatigue.
XAPPER cannot match the x-ray spectrum, but it can replicate a selected figure of merit (e.g., peak surface temperature, dose, stress, etc.).
XAPPER is used in the study of x-ray damage to chamber wall materials and will be applied to optics in the near future.
Our results to date show some roughening of tungsten, but we do not see anything that would suggest the first wall armor concept would not work.