Study of Proton stopping power in strongly coupled plasmas for Fast Ignition research.

2015 Fiscal Year Annual Research Report

• Project/Area Number: 26820396
• Research Institution: Osaka University
• Principal Investigator: Morace Alessio 大阪大学, レーザーエネルギー学研究センタ, 助教 (70724326)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: TNSA / RPA / Fast Ignition / ICF / Proton Fast Ignition

Outline of Annual Research Achievements

The project produced very important results that will be published on peer-reviewed journals in the near future, as well as deepened our knowledge on the transport of protons beams in plasmas for Fast Ignition research. The radiography of plasmas in cylindrical geometry has been demonstrated and this measurement provided us important information about the radiography technique, demonstrating that using electrically isolated and separated targets for ion generation and plasma sample is fundamental for the success of the radiographic technique itself. Avoiding indeed self -generated electric and magnetic fields inside the target sample that actively affect the proton beam generation and propagation in the plasma sample. Moreover through this Kakenhi project we had the chance to investigate the ion generation in ultra-thin, sub micro-meter targets, demonstrating a new hybrid TNSA-Radiation Pressure mechanism of ion generation for target thicknesses below 0.3 microns. This result was made possible by the great improvement in the LFEX laser contrast in the last year.
Finally with the purchase of a 2-nodes 40-cores workstation it was possible to investigate by PIC simulation the proton generation and transport in cone-in-shell geometry for Fast Ignition. This revealed the importance of self generated magnetic fields inside the cone that actively affect the proton beam transport to the cone tip, allowing to find different solutions to the problem. All results will be published in peer-reviewed papers within this year.

Research Products

• [Journal Article] Direct measurement of kilo-tesla level magnetic field generated with laser-driven capacitor-coil target by proton deflectometry (2016)
  • Author(s): K. F. F. Law, M. Bailly-Grandvaux, A. Morace et al.
  • Journal Title: Applied Physics Letters Volume: 108 Pages: 091104
  • DOI: 108/9/10.1063/1.4943078
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Heating efficiency evaluation with mimicking plasma conditions of integrated fast-ignition experiment (2015)
  • Author(s): S. Fujioka, T. Johzaki, Y. Arikawa, Z. Zhang, A. Morace et al.
  • Journal Title: Physical Review E Volume: 91 Pages: 063102
  • DOI: 10.1103/PhysRevE.91.063102
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Laser-driven platform for generation and characterization of strong quasi-static magnetic fields (2015)
  • Author(s): J. J. Santos., M. Bailly-Grandvaux, L. Giuffrida, P. Forestier-Colleoni, S. Fujioka, Z. Zhang, P. Korneev, R. Bouillaud, S. Dorard, D. Batani, M. Chevrot, J E. Cross, R. Crowston, J-L. Dubois, J. Gazave, G. Gregori, E. d'Humieres, S. Hulin, K. Ishihara, S. Kojima, E. Loyez, J-R. Marques, A. Morace et al.
  • Journal Title: New Journal of Physics Volume: 17 Pages: 083051
  • DOI: 10.1088/1367-2630/17/8/083051
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Presentation] Quasi-monoenergetic proton beams from ultra-thin foils (2015)
  • Author(s): A. Morace et al
  • Organizer: JPS fall
  • Place of Presentation: Kansai University
  • Year and Date: 2015-09-18 – 2015-09-18
• [Presentation] LFEX performances on fast electron and ion generation (2015)
  • Author(s): A. Morace et al
  • Organizer: OPIC2015
  • Place of Presentation: Pacifico Yokohama
  • Year and Date: 2015-05-21 – 2015-05-24
  • Int'l Joint Research