Details

Autor(en) / Beteiligte

• Ikegami, Masahiro
• Nakamura, Shu
• Iwashita, Yoshihisa
• Shirai, Toshiyuki
• Souda, Hikaru
• Tajima, Yujiro
• Tanabe, Mikio
• Tongu, Hiromu
• Itoh, Hiroyuki
• Shintaku, Hiroki
• Yamazaki, Atsushi
• Daido, Hiroyuki
• Yogo, Akifumi
• Orimo, Satoshi
• Mori, Michiaki
• Nishiuchi, Mamiko
• Ogura, Koichi
• Sagisaka, Akito
• Pirozhkov, Alexander S.
• Kiriyama, Hiromitsu
• Kanazawa, Shyuhei
• Kondo, Shuji
• Yamamoto, Yoichi
• Shimomura, Takuya
• Tanoue, Manabu
• Nakai, Yoshimoto
• Akutsu, Atsushi
• Bulanov, Sergei V.
• Kimura, Toyoaki
• Oishi, Yuji
• Nemoto, Koshichi
• Tajima, Toshiki
• Noda, Akira

Titel

Radial focusing and energy compression of a laser-produced proton beam by a synchronous rf field

Ist Teil von

• Physical review special topics. PRST-AB. Accelerators and beams, 2009-06, Vol.12 (6), p.063501, Article 063501

Ort / Verlag

American Physical Society

Erscheinungsjahr

2009

Link zum Volltext

Quelle

PROLA - Physical Review Online Archive

Beschreibungen/Notizen

• The dynamics of a MeV laser-produced proton beam affected by a radio frequency (rf) electric field has been studied. The proton beam was emitted normal to the rear surface of a thin polyimide target irradiated with an ultrashort pulsed laser with a power density of 4×10^{18}  W/cm^{2}. The energy spread was compressed to less than 11% at the full width at half maximum (FWHM) by an rf field. Focusing and defocusing effects of the transverse direction were also observed. These effects were analyzed and reproduced by Monte Carlo simulations. The simulation results show that the transversely focused protons had a broad continuous spectrum, while the peaks in the proton spectrum were defocused. Based on this new information, we propose that elimination of the continuous energy component of laser-produced protons is possible by utilizing a focal length difference between the continuous spectral protons and the protons included in the spectral peak.