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Esirkepov, T. Z.; Koga, J. K.; 砂原 淳*; 守田 利昌; 錦野 将元; 影山 慶*; 長友 英夫*; 西原 功修; 匂坂 明人; 小瀧 秀行; et al.
Nuclear Instruments and Methods in Physics Research A, 745, p.150 - 163, 2014/05
被引用回数:45 パーセンタイル:96.33(Instruments & Instrumentation)When a finite contrast petawatt laser pulse irradiates a micron-thick foil, a prepulse creates a preplasma, where an ultrashort relativistically strong portion of the laser pulse acquires higher intensity due to relativistic self-focusing and undergoes fast depletion transferring energy to fast electrons. If the preplasma thickness is optimal, the main pulse can reach the target generating fast ions more efficiently than an ideal, infinite contrast, laser pulse. The optimal conditions for hundreds of MeV ion acceleration are found with accompanying effects important for diagnostics, including high-order harmonics generation.
Koga, J. K.; Esirkepov, T. Z.; 砂原 淳*; 守田 利昌; 錦野 将元; 影山 慶*; 長友 英夫*; 西原 功修*; 匂坂 明人; 小瀧 秀行; et al.
no journal, ,
By theory, hydrodynamic simulation, and PIC simulation we have found that with pre-pulse levels generating a pre-plasma with optimum scale length a PW class laser having finite contrast can provide a few hundred MeV protons in the interaction with a solid thin film target.