Effects of nanosecond-scale prepulse on generation of high-energy protons in target normal sheath acceleration

Autor:	X. Y. Liang, C. Wang, N. Y. Wang, Zhong-tang Xu, Jian Lu, Hong-wei Zhang, R. X. Li, Yin Shi, Yaoxiang Liu, Wenpeng Wang, Yongbin Leng, Xinchao Lu, Baifei Shen, Yongbing Xu, Yang Li
Rok vydání:	2013
Předmět:	Physics Physics and Astronomy (miscellaneous) Proton Nanosecond Laser law.invention Pulse (physics) Acceleration law Physics::Accelerator Physics High harmonic generation Irradiation Atomic physics Beam (structure)
Zdroj:	Applied Physics Letters. 102:224101
ISSN:	1077-3118 0003-6951
Popis:	A pulse cleaner based on noncollinear optical-parametric amplification and second-harmonic generation processes is used to improve the contrast of a laser of peak intensity ∼2 × 1019 W/cm2 to ∼1011 at 100 ps before the peak of the main pulse. A 7 MeV proton beam is observed when a 2.5 μm-thick Al foil is irradiated by this high-contrast laser. The maximum proton energy decreases to 2.9 MeV when a low-contrast (∼108) laser is used. Two-dimensional particle-in-cell simulations combined with MULTI simulations show that the maximum proton energy sensitively relies on the detecting direction. The ns-time-scale prepulse can bend a thin target before the main pulse arrives, which reduces maximum proton energy in the target normal sheath acceleration.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::75e112c7dea72a6bc400e46b0c5a4f60 https://doi.org/10.1063/1.4809522 Zobrazit plný text záznamu