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Energy loss of heavy ions in dense plasma

Energy loss of heavy ions in dense plasma. Goal: To understand the interaction of heavy ions with hot, dense matter Therefore: Study the charge state evolutions and energy loss of heavy ions interacting with solids (HMI) and plasma (G SI).

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Energy loss of heavy ions in dense plasma

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  1. Energy loss of heavy ions in dense plasma Goal: To understand the interaction of heavy ions with hot, dense matter Therefore: Study the charge state evolutions and energy loss of heavy ions interacting with solids (HMI) and plasma (GSI). Application: Heavy Ion driven Inertial Confinement Fusion Heavy Ion driven Material Processing

  2. Experimental setup at GSI Plasma- and Laser diagnostic pinhole cameras X-ray spectroscopy visible streak camera laser interferometry laser output sensor PIC simulations of the laser-plasma interaction Interaction of Ar ions with solid carbon foils charge exchange cross sections charge dependent stopping power S(q) Outlook Outline

  3. nhelix focus lens target ion beam mirror Experimental setup at GSI Ion bunches at 103 MHz FWHM = 3 ns

  4. X-ray streak camera visible streak camera laser beam Laser output sensor pinhole cameras laser interferomerty Plasma diagnostic setup ion beam

  5. 0.42 12.81 3.36 0.6 8.79 2.61 Plasma diagnostic – pinhole camera Magnifying pinhole camera pinhole camera hn > 300 eV / 2 keV hn > 300 eV Te≈ 150 – 200 eV

  6. Plasma diagnostic – X-ray spectroscopy Time resolved and space integrated line radiation of carbon laser produced plasma time C+4 C+4 C+5 C+5 Ry Ry C-foil m=500 mg/cm2 l Te: I Lya/ I Heb ne : n max of Ry satellites Te~70-100 eV ne=1019-1020 cm-3

  7. V = 8.84 · 106 cm/s  T = 240 eV Plasma diagnostic – vis. streak camera

  8. Plasma diagnostic – laser interferometry Fringe shifts due to varying electron density, ne< 10 20 cm -3

  9. * 14 ns Laser diagnostic • Energy: 70 –110 J • Focus intensity profile • Temporal profile • Reflected light

  10. PIC simulation ring focus #27i, r = 0.4 mm, FWHM = 0.4 mm t=8 ns t=6 ns t=10 ns

  11. Charge State Evolution of Ar in solid C • HMI Berlin • Q3D: ΔE/E=1•10-4 • Exp: f(qi, qf, d) of • Ar, 4 MeV/u • Theory: • solution of the • rate equations cross sections • e-capture • ionization • excitation • decay Blazevic et al., Phys. Rev. A, vol. 61, 032901

  12. Charge dependent energy loss DE of Ar @ 4 MeV/u in Carbon

  13. Charge dependent stopping power S(q) ΔE(q,d) + бi + MCS  S(q) • Theory: • Sigmund/Schinner • Phys. Scr.T92 (2001) 222 • Schiwietz/Grande • NIM B153 (1999) 1 • Maynard • NIM A 464 (2001) 86 • Kaneko • Phys.Rev. A49(4) (1994)2681 Blazevic et al., NIM B 190 (2002) 64

  14. Outlook • Upgrade the laser interferometry to l = 256 nm, tL= 0.5 ns • 4 frame pinhole camera, texp= 3 ns • Improvement of the laser focus • Benchmarks for the PIC simulation of the plasma • Calculate the projectile´s charge states evolution in plasma • Scale the charge exchange cross sections in solid matter to plasma conditions & solve the rate equations • nN-CTMC simulation of the ion- plasma interaction • Energy loss experiments with the PHELIX laser and hohlraum targets

  15. PIC simulation ring focus #27d, r = 0.3 mm, FWHM = 0.4 mm t=9 ns t=8 ns t=10 ns

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