Abstract

The energies and number densities of ions emitted from laser-induced plasmas were studied by means of a simple time-of-flight technique. The plasmas were formed on solid elemental targets exposed to focused pulses from a Ti:Sapphire mode-locked laser and regenerative amplifier. The pulse energy and length were 1.0 mJ and 100 fs, respectively, with irradiance at the target of 2 X 10 13 W/cm2. Ion kinetic energies, number densities, and mass removal rates were measured as functions of atomic mass, repetition rate, and angular orientation of the target with respect to the detector. Ion velocities varied within the 5.0-30.0 km/s range, corresponding to an average kinetic energy of 20-50 eV. Observed angular distribution of ion energy and number density obeyed the simple cosine function, which varied slightly for different elements. The total number of atoms removed per pulse was about 2 X 10 13, while the ion fraction varied in the range of 3.0-5.0% for the majority of studied elements. The estimated total ion kinetic energy per pulse was ~ 10 14 eV, which corresponds to ~ 1.5% of laser pulse energy. Mass removal rates demonstrated a direct relationship to transport properties of free electrons.

Investigation of number density, temperature, and kinetic energy of nanosecond laser-induced Zr plasma species for self-generated electric and magnetic fields in axial expansion of plume

Tayyaba Sajid, Shazia Bashir, Mahreen Akram, Maira Razzaq, Mubashir Javed, and Khaliq Mahmood
J. Opt. Soc. Am. B 39(8) 1986-2005 (2022)

Selection of target elements for laser-produced plasma soft x-ray sources

Toshiki Tamura, Goki Arai, Yoshiki Kondo, Hiroyuki Hara, Tadashi Hatano, Takeo Ejima, Weihua Jiang, Chihiro Suzuki, Gerry O’Sullivan, and Takeshi Higashiguchi
Opt. Lett. 43(9) 2042-2045 (2018)

Ion pinhole imaging diagnostics on fast ion source in femtosecond laser plasma of cluster targets

Sergey Makarov, Sergey Pikuz, Anatoly Faenov, Tatiana Pikuz, Yuji Fukuda, Igor Skobelev, Irina Zhvaniya, Sergey Varzar, Masaki Kando, and Ryousuke Kodama
Opt. Express 25(14) 16419-16426 (2017)

Kilohertz sources of hard x rays and fast ions with femtosecond laser plasmas

A. Thoss, M. Richardson, G. Korn, M. Faubel, H. Stiel, U. Vogt, and T. Elsaesser
J. Opt. Soc. Am. B 20(1) 224-228 (2003)

High-efficiency water-window x-ray generation from nanowire array targets irradiated with femtosecond laser pulses

Yinren Shou, Defeng Kong, Pengjie Wang, Zhusong Mei, Zhengxuan Cao, Zhuo Pan, Yunhui Li, Shirui Xu, Guijun Qi, Shiyou Chen, Jiarui Zhao, Yanying Zhao, Changbo Fu, Wen Luo, Guoqiang Zhang, Xueqing Yan, and Wenjun Ma
Opt. Express 29(4) 5427-5436 (2021)