Energetic Protons from a Few-Micron Metallic Foil Evaporated by an Intense Laser Pulse

Matsukado, Koji; Esirkepov, T. Zh.; Kinoshita, K.; Daido, Hiroyuki; Utsumi, Takayuki; Z, Li; Fukumi, Atsushi; Hayashi, Yukio; Orimo, Satoshi; Nishiuchi, Mamiko; Буланов, С. В.; Tajima, T.; Noda, Akira; Iwashita, Yoshihisa; Shirai, Tomoyuki; Takeuchi, Tetsuya; Nakamura, S.; Yamazaki, A.; Ikegami, Machiko; Mihara, T.; Morita, Akio; Uesaka, Mitsuru; Yoshii, Kazumichi; Watanabe, Takahiro; Hosokai, Tomonao; Zhidkov, A G; Ogata, A.; Wada, Yoshio; Kubota, Tetsuo

doi:10.1103/physrevlett.91.215001

Cited by 144 publications

(38 citation statements)

References 32 publications

(11 reference statements)

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“…High-energy proton sources induced by laser-plasma interactions have been investigated experimentally~Ogawa et al, 2003;Doria et al, 2004! and they have proved to be potentially compact and inexpensive comparing with traditional ion sources at accelerators~Pegoraro et al, 2004!. High energy proton generation~.1 MeV! has been reported Denavit, 1992;Zhidkov et al, 1999;Esirkepov et al, 1999;Clark et al, 2000;Hegelich et al, 2002;Sentoku et al, 2003;Matsukado et al, 2003;Snavely et al, 2000;Wada et al, 2004;Boody et al, 1996;Borghhesi et al, 2002;Hoffmann et al, 2005;Roth et al, 2005;Fritzler et al, 2003; with irradiating an ultrashort pulsed high intensity laser onto thin foiled targets such as Tantalum, Copper, Aluminum, Plastic, and so on. In order to achieve those parameters it is very important to optimize laser and target conditions.…”

Section: Introductionmentioning

confidence: 92%

Observation of strongly collimated proton beam from Tantalum targets irradiated with circular polarized laser pulses

et al. 2006

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High-energy protons are generated by focusing an ultrashort pulsed high intensity laser at the Advanced Photon Research Center, JAERI-Kansai onto thin~thickness ,10 mm! Tantalum targets. The laser intensities are about 4 ϫ 10 18 W0cm 2 . The prepulse level of the laser pulse is measured with combination of a PIN photo diode and a cross correlator and is less than 10 Ϫ6 . A quarter-wave plate is installed into the laser beam line to create circularly polarized pulses. Collimated high energy protons are observed with CH coated Tantalum targets irradiated with the circularly polarized laser pulses. The beam divergence of the generated proton beam is measured with a CR-39 track detector and is about 6 mrad.

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Section: Introductionmentioning

confidence: 92%

Observation of strongly collimated proton beam from Tantalum targets irradiated with circular polarized laser pulses

et al. 2006

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“…This line of research has grown into a large and successful field, recently demonstrating trapping and acceleration of a mono-energetic electron beam [23]. Other experiments used a similar physical mechanism by shining a laser onto a thin foil to ablatively accelerate particles, both electrons and ions, from the surface [24]. Further discussion of these acceleration schemes is outside the scope of this thesis.…”

Section: W/cmmentioning

confidence: 99%

Production, Characterization, and Acceleration of Optical Microbunches

Sears¹

2008

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Optical microbunches with a spacing of 800 nm have been produced for laser acceleration research. The microbunches are produced using a inverse Free-ElectronLaser (IFEL) followed by a dispersive chicane. The microbunched electron beam is characterized by coherent optical transition radiation (COTR) with good agreement to the analytic theory for bunch formation. In a second experiment the bunches are accelerated in a second stage to achieve for the first time direct net acceleration of electrons traveling in a vacuum with visible light.This dissertation presents the theory of microbunch formation and characterization of the microbunches. It also presents the design of the experimental hardware from magnetostatic and particle tracking simulations, to fabrication and measurement of the undulator and chicane magnets. Finally, the dissertation discusses three experiments aimed at demonstrating the IFEL interaction, microbunch production, and the net acceleration of the microbunched beam.At the close of the dissertation, a separate but related research effort on the tight focusing of electrons for coupling into optical scale, Photonic Bandgap, structures is presented. This includes the design and fabrication of a strong focusing permanent magnet quadrupole triplet and an outline of an initial experiment using the triplet to observe wakefields generated by an electron beam passing through an optical scale accelerator. Beyond the immediate influences on my career of those at SLAC and Stanford,

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“…In particular, in the TNSA regime higher ion energy is expected from thinner target in the ideal case, but in real experiments the rear surface of very thin targets is perturbed due to the preplasma formation, so there is an optimum target thickness (Kaluza et al 2004). The ASE can even turn the originally soliddensity target into a near-critical density plasma cloud (Matsukado et al 2003;Yogo et al 2008), so the acceleration mechanism changes, and the ions are accelerated by a long-living charge separation electric field, sustained by a quasistatic magnetic field of dipole vortex (Bulanov et al 2005;Fukuda et al 2009). In order to understand the influence of the laser contrast in the described experiments, we performed the laser contrast diagnostics based on the target reflectivity measurement.…”

Section: On the Contrast Of High-power Lasersmentioning

confidence: 99%