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Independent operations of 3 legs of OMEGA-60

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

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Independent operations of 3 legs of OMEGA-60

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  1. 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

  2. Using 2 beam legs on BL Driver would benefit experiments that need bright x-ray sources for diagnostic techniques Radiative shock target • 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 Be disk Xe filled tube Gold shielding Scattered spectrum collected with the zinc spectrometer. Analysis indicates a weighted average electron temperature of ~35 eV.

  3. 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

  4. 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

  5. Proposal for next FY • Add 64 mm amplifier to BL driver • Current configuration of SSD driver (LARA and 64 mm amp) • Increased Energy available

  6. 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

  7. New Recommendation: Imaging Thomson scattering measures plasma conditions along the Thomson scattering probe beam providing spatially resolved data • Te peaks where the beams cross October ‘05 Shots (ITS Activation): • ITS slot was cut 200mm from LEH • Imaging TS uses 200 ps probe pulse for time resolution P9 4 Imaging TS Data P4 Slide Credit: Steven Ross

  8. 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

  9. Thanks to… • Jason Puth • Elizabeth Hill • Steve Stagnitto • Sam Morse • and many more..

  10. 52o CW Rotation P1 P9 P12 Spectrometer view (prior to rotation) The spectral slit has been aligned with the 4w probe beam by rotating the spectrometer by 52 degrees Grid is rotated 52 CW by transport mirrors Slot (0.5mm x 1.6mm) 4 Target Plane Viewed from TIM2 P1 P9 P9 P12 Spectrometer is rotated by 52 degrees to align the spectral slit along the P9 axis (hohlraum axis) Field of view is 2-mm System resolution: clearly resolves 63 micron features Slide Credit: Steven Ross

  11. 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

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