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In this paper, the evolution of laser-induced copper plasma spectrum intensity under magnetic field confinement is studied. The evolution process of plasma spectrum intensity and laser energy effect on spectral enhancement are analyzed. Experimental results show that the atomic spectrum and ion spectrum of copper plasma are enhanced as magnetic field increases. In the spectral intensity evolution plot of Cu I 510.55 nm there appears double peak structure in a time range from 1.2 μs to 5.7 μs. The spectral intensity of Cu I 510.55 nm is significantly enhanced in a space range from 0 mm to 1.4 mm away from the target surface. The spectral enhancement factors of Cu I 510.55 nm and Cu I 515.32 nm monotonically decrease with the laser pulse energy increasing, and the maximum enhancement factors for Cu I 510.55 nm and Cu I 515.32 nm are 11 and 8 respectively at the laser energy 20 mJ. The enhancement mechanism of magnetic confinement plasma spectrum is also discussed.
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Keywords:
- laser plasma /
- optical enhancement /
- magnetic confined
[1] Kitaoka C, Wagatsuma K 2009 Meta. Ana. 3 003
[2] Agnes N, Tao H Y, Hao Z Q, Sun C K, Gao X, Lin J Q 2013 Chin. Phys. B 22 014209
[3] Liu J, Tao H Y, Gao X, Hao Z Q, Lin J Q 2013 Chin. Phys. B 22 044206
[4] Du C, Gao X, Shao Y, Song X W, Zhao Z M, Hao Z Q, Lin J Q 2013 Acta Phys. Sin. 62 045202 (in Chinese) [杜闯, 高勋, 邵妍, 宋晓伟, 赵振明, 郝作强, 林景全 2013 62 045202]
[5] Harilal S S, Tillack M S, O'shay B, Bindhu C V, Najmabadi F 2004 Phys. Rev. E 69 026413
[6] Guo L B, Hu W, Zhang B Y, He X N, Li C M, Zhou Y S, Cai Z X, Zeng X Y, Lu Y F 2011 Opt. Exp. 19 14067
[7] Li Y, Hu C, Zhang H, Jiang Z, Li Z 2009 Appl. Opt. 48 B105
[8] Chen Z, Bogaerts A 2005 J. Phys. 97 063305
[9] Shen X K, He X N, Huang H, Lu Y F 2007 Appl. Phys. Lett. 91 081501
[10] Neogi A, Thareja R K 1999 Phys. Plasma 6 365
[11] Bittencourt José A 2004 Fundamentals of Plasma Physics Fund (New York: Springer Press) pp470-477
[12] Rai V N, Rai A K, Yueh F Y, Singh J P 2003 Appl. Opt. 42 2085
[13] Chen F F, Lieberman M A 1984 Introduction to Plasma Physics and Controlled Fusion (New York: Plenum Press) pp184-189
[14] Nolte S, Momma C, Jacobs H, Tnnermann A, Chichkov B N, Wellegehausen B, Welling H 1997 J. Opt. Soc. Am. B 14 2716
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[1] Kitaoka C, Wagatsuma K 2009 Meta. Ana. 3 003
[2] Agnes N, Tao H Y, Hao Z Q, Sun C K, Gao X, Lin J Q 2013 Chin. Phys. B 22 014209
[3] Liu J, Tao H Y, Gao X, Hao Z Q, Lin J Q 2013 Chin. Phys. B 22 044206
[4] Du C, Gao X, Shao Y, Song X W, Zhao Z M, Hao Z Q, Lin J Q 2013 Acta Phys. Sin. 62 045202 (in Chinese) [杜闯, 高勋, 邵妍, 宋晓伟, 赵振明, 郝作强, 林景全 2013 62 045202]
[5] Harilal S S, Tillack M S, O'shay B, Bindhu C V, Najmabadi F 2004 Phys. Rev. E 69 026413
[6] Guo L B, Hu W, Zhang B Y, He X N, Li C M, Zhou Y S, Cai Z X, Zeng X Y, Lu Y F 2011 Opt. Exp. 19 14067
[7] Li Y, Hu C, Zhang H, Jiang Z, Li Z 2009 Appl. Opt. 48 B105
[8] Chen Z, Bogaerts A 2005 J. Phys. 97 063305
[9] Shen X K, He X N, Huang H, Lu Y F 2007 Appl. Phys. Lett. 91 081501
[10] Neogi A, Thareja R K 1999 Phys. Plasma 6 365
[11] Bittencourt José A 2004 Fundamentals of Plasma Physics Fund (New York: Springer Press) pp470-477
[12] Rai V N, Rai A K, Yueh F Y, Singh J P 2003 Appl. Opt. 42 2085
[13] Chen F F, Lieberman M A 1984 Introduction to Plasma Physics and Controlled Fusion (New York: Plenum Press) pp184-189
[14] Nolte S, Momma C, Jacobs H, Tnnermann A, Chichkov B N, Wellegehausen B, Welling H 1997 J. Opt. Soc. Am. B 14 2716
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