Enhancement of proton collimation and acceleration by an ultra-intense laser interacting with a cone target followed by a beam collimator

Nureli YASEN; Yajuan HOU (侯雅娟); Li WANG (王莉); Haibo SANG (桑海波); Mamat ALI BAKE; Baisong XIE (谢柏松)

doi:10.1088/2058-6272/aaf7cf

Plasma Science and Technology > 2019 > 21(4): 45201-045201. > DOI: 10.1088/2058-6272/aaf7cf

Nureli YASEN, Yajuan HOU (侯雅娟), Li WANG (王莉), Haibo SANG (桑海波), Mamat ALI BAKE, Baisong XIE (谢柏松). Enhancement of proton collimation and acceleration by an ultra-intense laser interacting with a cone target followed by a beam collimator[J]. Plasma Science and Technology, 2019, 21(4): 45201-045201. DOI: 10.1088/2058-6272/aaf7cf

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Enhancement of proton collimation and acceleration by an ultra-intense laser interacting with a cone target followed by a beam collimator

¹ Key Laboratory of Beam Technology of the Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, People’s Republic of China
² School of Physics Science and Technology, Xinjiang University, Urumqi 830046, People’s Republic of China
³ Beijing Radiation Center, Beijing 100875, People’s Republic of China

Funds: Acknowledgments This work was sustained by National Natural Science Foundation of China (NSFC) (Nos. 11475026, 11664039 and 11305010). The calculation was carried out on the HSCC of Beijing Normal University. The authors are very grateful to Amir Sanjari (MInstP) for spending much time and energy making careful revisions to our paper. The authors are particularly grateful to CFSA at the University of Warwick for allowing us to use EPOCH.

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Received Date: September 27, 2018

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Abstract

A special method is proposed of a laser-induced cavity pressure acceleration scheme for collimating, accelerating and guiding protons, using a single-cone target with a beam collimator through a target normal sheath acceleration mechanism. In addition, the problems involved are studied by using two-dimensional particle-in-cell simulations. The results show that the proton beam can be collimated, accelerated and guided effectively through this type of target. Theoretically, a formula is derived for the combined electric field of accelerating protons. Compared with a proton beam without a beam collimator, the proton beam density and cut-off energy of protons in the type II are increased by 3.3 times and 10% respectively. Detailed analysis shows that the enhancement is mainly due to the compact and strong sheath electrostatic field, and that the beam collimator plays a role in focusing energy. In addition, the simulation results show that the divergence angle of the proton beam in type II is less than 1.67 times that of type I. The more prominent point is that the proton number of type II is 2.2 times higher than that of type I. This kind of target has important applications in many fields, such as fast ion ignition in inertial fusion, high energy physics and proton therapy.

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2.	Nishiura, T., Satou, H., Kawata, S. et al. Control of intense-laser ion acceleration. High Energy Density Physics, 2020. DOI:10.1016/j.hedp.2020.100799

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Enhancement of proton collimation and acceleration by an ultra-intense laser interacting with a cone target followed by a beam collimator

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