revised target lists focus on shock heating and e-transport in wdm targets
DESCRIPTION
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) - PowerPoint PPT PresentationTRANSCRIPT
01/20/2009 Wei, Sawada, Macphee, Mackinnon 1
• 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
Titan Feb./March 2009 Experiment planning Status: Jan. 20, 2009
01/20/2009 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 experimentSHCCD
Axis to Cu crystal
And HOPG
16°
20°
Target normal
17°
01/20/2009 Wei, Sawada, Macphee, Mackinnon 3
The electron transport target will be irradiated with the long and short pulse in nearly opposite direction
Axis to Cu crystal
And HOPG
16°
20°
Target normal
17°
Long pulse beam (from Door A)
East-West axis
Short pulse beam
17.71°
18.5°
Target normalBeam axis
Long pulse beam parameter• f# = 7.35• 600 um spot with phase plate
tccAu
Target view from front (short pulse beam side)
Target view from behind (long pulse beam side)
45 degree bevel all around
01/20/2009 Wei, Sawada, Macphee, Mackinnon 4
Cu imager 1(primary dia.)
To TL3
To TL2
DC-HOPG Cu (primary dia.)
FROG
Cu imager 2(primary dia.)
SOP (primary dia.)
Diagnostics and beam layout for
the WDM experiment(Jan. 20, 2009)
Beam axis
LPThrough Door A
Reentrant HOPG can be moved to various port as needed
Streaked HOPGSecondary diagnostics
IP for Ti Ka radiography in point projection(primary dia.)
01/20/2009 Wei, Sawada, Macphee, Mackinnon 5
VSG
Titan short pulse
BN
Si?
D = 400m(ROC = 250m)
X = 375m
• 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)
targetGrating Detector
Plane
3.8° to 7.8 ° ~ 325 eV to
1700 eV VSG = variable separation grating = XUV spectrometer
Warm dense plasma creation via proton isochoric heating and characterization by emission spectroscopy
01/20/2009 Wei, Sawada, Macphee, Mackinnon 6
Diagnostics
Exp Diagnostics Location Comments StatusWDM experimentCu Ka imager back (TL2) and side (TL3) side on Cu Ka imager for transport in WDM ready?
Ti Ka backlighter equatorial plane along east-west point projection for radiagraphy shot ready?8-11keV HOPG back new designs, identical to EP ready?HOPG (Cu lines) back time-resolved measurement? ready?re-entranct HOPG flexible backup ready?SOP front target normal ?
FROG specular direction time resolved measurements
ride along x-ray diag TBDProton heating exp.VSG near target normal for proton shots Ready?RCF target normalLasersSP regular 17 degree from the front target normal availableLP coming through Door A 18 degree from the rear target normal availableLaser DiagnosticsEquivalent Plane laser diagnostic table? ?Pre-pulse Monitor laser dignostic table? ?Autocorrelator Are we doing this? ?
01/20/2009 Wei, Sawada, Macphee, Mackinnon 7
Targets requested from LLNL
Target types Specs (in unit of µm) Number Laser beams
Heated transport 0.1Al/25CH/5Cu/138CRF/3.9Au 26 LP+SP on the package target
heated point projection radiography
0.1Al/25CH/5Cu/138CRF/5.1Au 6 LP on the package,
Ti disk, 250 µm dia, 10 µm thick 12 SP on Ti foil
20Al/5Cu/138CRF/3.9Au 4
Unheated transport 20Al/5Cu/15CH/3.9Au 6 SP only
20Al/5Cu/3.9Au 6
SOP calibration Al steps 20/40 µm thick 3 LP only
CRF shock velocity targets
CRF steps with Al flash on step side0.1Al/25CH/CRF step(150/160)/0.1Al
3 LP only
Transport in shockedAu target
0.1Al/25CH/5Cu/25Au 10 LP+SP
0.1Al/25CH/5Cu/12.5Au 5
Proton heating targets Hollow hemi with grid(2), hemi + Si(?) with Boron Nitride coating on side (specs to be added)(5)
7 SP only
01/20/2009 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)
01/20/2009 Wei, Sawada, Macphee, Mackinnon 9
Who will be doing the experiment?(please let us know your interests, suggested responsibilities to be added/modified)
Schedule of People Suggested responsibilities Additional comments
Andrew full 5 weeks Lead and run the exp.
Sebastien Help on SOP setup, +proton shots In&out
Andy Oversee the exp + proton shots In & out
Prav Oversee the exp In&out
Yuan Half time? FROG ?
Dan Help setup EPM(?)+ridealong x-ray diagnostics
In&out
Kramer Help on diagnostics setup? In&out
Mingsheng Full 5 weeks Assist Andrew co-run the exp, Ti Ka radiography?
Foreign national
Hiroshi Full 5 weeks SOP+shot sheet Foreign national
Sugreev Full 5 weeks DC-HOPG + streaked HOPG
Brad Full 5 weeks Ka imagers + target alignment?
Bob+student/postdoc Full 5 weeks? Prepulse, autocorrelator,help Dan on the ride-along x-ray diag.
Foreign nationals
Student from OSU? ? ?
anybody else? ? ?
Rich Oversee the exp In&out
Farhat Oversee the exp In&out, Foreign national
01/20/2009 Wei, Sawada, Macphee, Mackinnon 10
Hydro simulation results of warm dense plasmas in the shocked foam package target (with Hyades code)
• 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)
Target: 5µmAu/150µmCHfoam(0.15mg/cc)/5µmCu/25µmCH
Long pulse laser:Intensity 4e13 W/cm2 3ns square pulse, green
01/20/2009 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~41022 cm-3, Te~5-7 eV, ~ 75 µm in length
01/20/2009 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
01/20/2009 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
Higher absorption may lead to this higher compression
01/20/2009 Wei, Sawada, Macphee, Mackinnon 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