Independent operations of 3 legs of OMEGA-60
description
Transcript of Independent operations of 3 legs of OMEGA-60
![Page 1: Independent operations of 3 legs of OMEGA-60](https://reader035.fdocuments.us/reader035/viewer/2022062520/56815e2d550346895dcc86ad/html5/thumbnails/1.jpg)
Independent operations of 3 legs of OMEGA-60
• Long-term request: 3 independent legs– Benefits include
• Overall increased flexibility in beam/driver configuration• Use 2 beam legs on BL Driver• 3 independent pulse shapes• Beam delays longer than current PLAS limitations• Increased energy performance on BL Driver
• Short-term request: 2 legs on BL driver – Benefits include
• Overall increased flexibility in beam/driver configuration• Use 2 beam legs on BL Driver• Increased energy performance on BL Driver
Carolyn Kuranz OLUG 2011
![Page 2: Independent operations of 3 legs of OMEGA-60](https://reader035.fdocuments.us/reader035/viewer/2022062520/56815e2d550346895dcc86ad/html5/thumbnails/2.jpg)
Using 2 beam legs on BL Driver would benefit experiments that need bright x-ray sources for diagnostic techniques
• Techniques such as x-ray radiography and x-ray Thomson scattering require bright x-ray sources
• Creating x-ray sources from high-Z materials requires high-irradiance laser pulses
• This will improve current experiments as well as open a new class of experiments involving bright x-ray sources
Radiative shock target
Be disk
Xe filled tube
Gold shielding
Scattered spectrum collected with the zinc spectrometer. Analysis indicates a weighted average electron temperature of ~35 eV.
![Page 3: Independent operations of 3 legs of OMEGA-60](https://reader035.fdocuments.us/reader035/viewer/2022062520/56815e2d550346895dcc86ad/html5/thumbnails/3.jpg)
Beam delays longer than current PLAS limitations can be used to increase delays between multiple observations
on a single shot
• Beneficial to experiments using multiple diagnostic techniques
Hartigan et al, Astrophysical Journal, 2009
![Page 4: Independent operations of 3 legs of OMEGA-60](https://reader035.fdocuments.us/reader035/viewer/2022062520/56815e2d550346895dcc86ad/html5/thumbnails/4.jpg)
By Q4 FY12
• Backlighter driver going down shortly• BL driver to use Main regen
– Add improved timing diagnostics• Could result in better than 100 ps accuracy for very
long delays
– Improved stability– Improved spatial profile
• Possible increase in energy
![Page 5: Independent operations of 3 legs of OMEGA-60](https://reader035.fdocuments.us/reader035/viewer/2022062520/56815e2d550346895dcc86ad/html5/thumbnails/5.jpg)
Proposal for next FY
• Add 64 mm amplifier to BL driver– Current configuration of SSD driver (LARA and 64
mm amp)– Increased Energy available
![Page 6: Independent operations of 3 legs of OMEGA-60](https://reader035.fdocuments.us/reader035/viewer/2022062520/56815e2d550346895dcc86ad/html5/thumbnails/6.jpg)
Future possibilities
• 2 leg Limited option– Allows for BL to run 2 specific legs– Leg 1 and 3 OR Legs 2 and 3– Cost unknown but limited downtime to BL
• Redo A-split – ~$ 1 mil, large amount of downtime
• Duplicate 1-split- similar cost, possibly less downtime
• 3 drivers – very costly, space issues
![Page 7: Independent operations of 3 legs of OMEGA-60](https://reader035.fdocuments.us/reader035/viewer/2022062520/56815e2d550346895dcc86ad/html5/thumbnails/7.jpg)
New Recommendation: Imaging Thomson scattering measures plasma conditions along the Thomson scattering probe beam providing spatially resolved data
P94
-1
-0.5
0
0.5
1
-6 -4 -2 0 2 4 6Wavelength Shift (A)
P4
Te peaks where the beams crossOctober ‘05 Shots (ITS Activation): ITS slot was cut 200m from LEH Imaging TS uses 200 ps probe
pulse for time resolution
00.5
11.5
22.5
33.5
-1.5 -1 -0.5 0 0.5 1 1.5
Thomson Scattering (t=800ps)Flux Limit Diffussion (f=0.05)Nonlocal Model
Position (mm)
Imaging TS Data
Slide Credit: Steven Ross
![Page 8: Independent operations of 3 legs of OMEGA-60](https://reader035.fdocuments.us/reader035/viewer/2022062520/56815e2d550346895dcc86ad/html5/thumbnails/8.jpg)
Summary
• Recommendations completed or underway– Increased accuracy in driver-to-driver timing for
long driver delays– 10 additional SG8 phase plates– Improved BL driver performance
• New or continued recommendations– Independent operation of 3 beam legs– Imaging UVTS– Foreground illumination in TVS viewers
![Page 9: Independent operations of 3 legs of OMEGA-60](https://reader035.fdocuments.us/reader035/viewer/2022062520/56815e2d550346895dcc86ad/html5/thumbnails/9.jpg)
Thanks to…
• Jason Puth• Elizabeth Hill• Steve Stagnitto • Sam Morse• and many more..
![Page 10: Independent operations of 3 legs of OMEGA-60](https://reader035.fdocuments.us/reader035/viewer/2022062520/56815e2d550346895dcc86ad/html5/thumbnails/10.jpg)
P1
P12
Viewed from TIM2
Target Plane
P9
The spectral slit has been aligned with the 4 probe beam by rotating the spectrometer by 52 degrees
P12
P9 P1
Spectrometer view(prior to rotation)
52o CW Rotation
Spectrometer is rotated by 52 degrees to align the spectral slit along the P9 axis (hohlraum axis)
Grid is rotated 52 CW by transport mirrors
Field of view is 2-mmSystem resolution: clearly resolves 63 micron features
P9
Slot (0.5mm x 1.6mm) 4
Slide Credit: Steven Ross
![Page 11: Independent operations of 3 legs of OMEGA-60](https://reader035.fdocuments.us/reader035/viewer/2022062520/56815e2d550346895dcc86ad/html5/thumbnails/11.jpg)
Update on improved timing for long delays between drivers
• Currently using longer sweep speed on P510s which has improved timing accuracy
• LLE is continuing to improve this by adding a timing scope on the front end– Could result in better than 100 ps accuracy for
very long delays