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Revised target lists Focus on shock heating and e-transport in WDM targets

Titan Feb./March 2009 Experiment planning Status: Jan. 20, 2009. Revised target lists Focus on shock heating and e-transport in WDM targets Add electron transport in shocked Au targets (~2 day shots) Add some proton hemisphere + foil targets for proton heating shots (~1 day shots)

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Revised target lists Focus on shock heating and e-transport in WDM targets

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  1. Titan Feb./March 2009 Experiment planning Status: Jan. 20, 2009 • Revised target lists • Focus on shock heating and e-transport in WDM targets • Add electron transport in shocked Au targets (~2 day shots) • Add some proton hemisphere + foil targets for proton heating shots (~1 day shots) • Electron source targets postponed to April (2 weeks) • Targets requested from LLNL ( Walter has all the information) • Al target supports requested from GA (total 70 supports) • Beams and diagnostics layout defined • Hydro simulations have been performed for shock velocity, timing and warm dense plasmas creation (Bhooshan@UCSD, Mark@LLNL) • In the process defining laser specs for each shot group, and priority/order of shots. • Need to define laser (SP+LP) alignment procedure • Need to define target alignment procedure • Discuss data logging/shot sheet/real-time analysis, participants’ responsibilities • Need LSP simulations for transport study Wei, Sawada, Macphee, Mackinnon

  2. Titan Feb./March 2009 Campaign • Dates: Feb 9 - March 13 (5 weeks) [ will likely be delayed due to the Callisto accident] • Expect ~ _75 shots • Goals • Create and characterize WDM targets using LP driven shock compression and heating of low density foams using side-on radiography and SOP • SP produced electron transport in such WDM targets by measuring Ka yield and angular distribution and compare with cold targets • Electron beam transport in shocked gold targets (CH/Cu/Au) – Relevant to shocked Au cone tip physics in FI • Create and characterize WDM targets using SP produced protons • Test the emission spectroscopy technique for EP proton heating experiment SHCCD Target normal 16° 17° Axis to Cu crystal And HOPG 20° Wei, Sawada, Macphee, Mackinnon

  3. The electron transport target will be irradiated with the long and short pulse in nearly opposite direction Target view from front (short pulse beam side) Short pulse beam 17.71° Target normal Beam axis Au tcc Target view from behind (long pulse beam side) East-West axis Target normal 45 degree bevel all around 16° 17° Long pulse beam (from Door A) • Long pulse beam parameter • f# = 7.35 • 600 um spot with phase plate 18.5° Axis to Cu crystal And HOPG 20° Wei, Sawada, Macphee, Mackinnon

  4. Diagnostics and beam layout for the WDM experiment (Jan. 20, 2009) To TL2 Beam axis Reentrant HOPG can be moved to various port as needed SOP (primary dia.) FROG Cu imager 2 (primary dia.) To TL3 IP for Ti Ka radiography in point projection (primary dia.) Streaked HOPG Secondary diagnostics Cu imager 1 (primary dia.) DC-HOPG Cu (primary dia.) LP Through Door A Wei, Sawada, Macphee, Mackinnon

  5. Warm dense plasma creation via proton isochoric heating and characterization by emission spectroscopy 3.8° to 7.8 ° ~ 325 eV to 1700 eV target Grating Detector Plane Titan short pulse D = 400m (ROC = 250m) X = 375m Si? BN VSG VSG = variable separation grating = XUV spectrometer • Create 100micron wide plasma @ ? eV and solid density • Use VSG (has been developed for use on Titan) to diagnose spectral lines from Nitrogen k - shell ( He-like to H like lines at 400-700eV) Wei, Sawada, Macphee, Mackinnon

  6. Diagnostics Wei, Sawada, Macphee, Mackinnon

  7. Targets requested from LLNL Wei, Sawada, Macphee, Mackinnon

  8. Draft List of shots (in the process of refining) • LP only , SOP calibration and shock velocity • SOP alignment with Al step targets (3 shots) • Shock velocity in CRF foam with SOP(3 shots) • LP+SP (Ti Ka backlight), shock timing • Backlight + Au mesh (4 shots) • Backlighting foam package at t=0 , before shock breakout(6 shots) • Diagnostic shots with and Cu foil (2 shots) • Short pulse(SP) only, e-beam transport in • Al/Cu/CRF/Au (2 shots with 1ps, 2 shots with 10 ps) • Al/Cu/Au (2 shots with 1ps, 2 shots with 10 ps) • Al/Cu/CH/Au (2 shots with 1ps, 2 shots with 10 ps) • SP/LP on target, e-transport in shocked CRF foam targets • LP only, background shots (2 shots) • At t1, t2, t3 with 1ps SP, maximum energy? (9 shots) • Repeat with 10 ps SP, maximum energy (9 shots) • SP/LP on target, e-transport in shocked Au targets (CH/Cu/Au[25 or 12]) • Unshocked target with SP only (2 shots) • Fully shocked Au with LP and SP (2 shots) • After shock breakout with LP and SP (2 shots) • Partially shocked Au with LP and SP (2 shots) • Repeat unshocked and fully shocked case with 12 um Au (4 shots) • Proton beam production and heating • beam characterization using hemisphere targets (2shots) • Heating in a secondary foil targets (5shots) Wei, Sawada, Macphee, Mackinnon

  9. Who will be doing the experiment?(please let us know your interests, suggested responsibilities to be added/modified) Wei, Sawada, Macphee, Mackinnon

  10. Hydro simulation results of warm dense plasmas in the shocked foam package target (with Hyades code) Target: 5µmAu/150µmCHfoam(0.15mg/cc)/5µmCu/25µmCH Long pulse laser: Intensity 4e13 W/cm2 3ns square pulse, green • Shock reaches the gold/CH foam interface at about 5.2 ns • Peak compression is achieved at bout 6.3ns with the compressed foam density of ~ 2g/cc, Te~15-20 eV,~ 10 µm in length (not suitable for transport study) Wei, Sawada, Macphee, Mackinnon

  11. Foam plasma condition at later time may be preferred for transport study • Compressed foam plasmas relax and expand with time • At 10ns, mass density of ~ 0.25-0.35 g/cc, ne~41022 cm-3, Te~5-7 eV, ~ 75 µm in length Wei, Sawada, Macphee, Mackinnon

  12. Foam plasma condition at later time may be preferred for transport study • Compressed foam plasmas relax and expand with time • At 10ns, mass density of ~ 0.3-0.4 g/cc, ne~(2-3)1022 cm-3, Te~5-7 eV, • ~ 80 µm in length Wei, Sawada, Macphee, Mackinnon

  13. Lasnex simulations (M. Foord) show similar trends, but with higher compression • At 10ns, mass density of ~ 0.55-1.1g/cc, • Te~5-7 eV, ~ 30 µm in length Wei, Sawada, Macphee, Mackinnon Higher absorption may lead to this higher compression

  14. Hyades simulation results for the shocked Au in the CH(25µm)/Cu(5µm)/Au(30 µm) target Shock propagates into 12 µm Au at about 1.8 ns Wei, Sawada, Macphee, Mackinnon

  15. Hyades simulation results for the shocked Au in the CH(25µm)/Cu(5µm)/Au(30 µm) target Shock propagates into 25 µm thick Au at about 2.9 ns Wei, Sawada, Macphee, Mackinnon

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