TITLE

Reshaping of intense laser pulse with a capillary

AUTHOR(S)
Lihua Cao; Wei Yu; Yu, M. Y.; Xin Wang; Yuqiu Gu; He, X. T.
PUB. DATE
September 2009
SOURCE
Physics of Plasmas;Sep2009, Vol. 16 Issue 9, p093109
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The reshaping of intense laser pulse by vacuum capillary is studied by particle-in-cell simulation. It is shown that as an intense laser pulse propagates from free space into a capillary, its profile is reshaped due to laser-plasma interaction near the entrance of capillary. As a result, the free-space mode is self-consistently converted into a capillary mode. Only the relatively low-intensity periphery of the reshaped pulse interacts with the capillary-wall plasma, so that the high-intensity center of the pulse can propagate in the narrow vacuum channel over a distance much larger than the Rayleigh length. The mechanism is then applied to reshape a radially imperfect laser pulse having two wings around the center spot. Most of the output light energy is concentrated in the center spot, and the wings are almost completely removed. That is, the quality of the laser pulse can be greatly improved by a capillary.
ACCESSION #
44387826

 

Related Articles

  • Effects of dust size distribution on dust acoustic waves in magnetized two-ion-temperature dusty plasmas. Zong-ming Liu; Wen-shan Duan; Guang-jun He // Physics of Plasmas;Aug2008, Vol. 15 Issue 8, p083702 

    A Zakharov–Kuznetsov (ZK) equation, a modified ZK (mZK) equation, and a coupled ZK (cZK) equation for small but finite amplitude dust acoustic waves in a magnetized two-ion-temperature dusty plasma with dust size distribution have been investigated in this paper. The variations of the...

  • High-energy monoenergetic proton bunch from laser interaction with a complex target. Fengchao Wang; Baifei Shen; Xiaomei Zhang; Zhangying Jin; Meng Wen; Liangliang Ji; Wenpeng Wang; Jiancai Xu; Yu, M. Y.; Cary, J. // Physics of Plasmas;Sep2009, Vol. 16 Issue 9, p093112 

    Generation of high-energy proton bunch in the interaction of a high-power laser pulse with a complex target consisting of a front horizontal slice adjoining a conventional heavy ion and proton double-layer slab is investigated using two-dimensional particle-in-cell simulation. The laser pulse...

  • The transition from plasma gratings to cavitons in laser-plasma interactions. Liu, Z. J.; He, X. T.; Zheng, C. Y.; Wang, Y. G. // Physics of Plasmas;Sep2009, Vol. 16 Issue 9, p093108 

    One-dimensional Vlasov–Maxwell simulations of laser-plasma interactions are presented. It is shown that plasma gratings and density cavitons are formed sequentially. There are strong electromagnetic fields in the cavitons and the electromagnetic structures are nearly standing and...

  • Acceleration of electrons generated during ionization of a gas by a nearly flat profile laser pulse. Singh, Kunwar Pal // Physics of Plasmas;Sep2009, Vol. 16 Issue 9, p093103 

    A scheme of acceleration of electrons generated during ionization of krypton by nearly flat radial and nearly flat temporal laser pulse profiles has been suggested. The energy spectrum of the electrons suggests that energy of the electrons is higher for a nearly flat temporal profile than that...

  • Laser pulse guiding and electron acceleration in the ablative capillary discharge plasma. Kameshima, T.; Kotaki, H.; Kando, M.; Daito, I.; Kawase, K.; Fukuda, Y.; Chen, L. M.; Homma, T.; Kondo, S.; Esirkepov, T. Zh.; Bobrova, N. A.; Sasorov, P. V.; Bulanov, S. V. // Physics of Plasmas;Sep2009, Vol. 16 Issue 9, p093101 

    The results of experiments are presented for the laser electron acceleration in the ablative capillary discharge plasma. The plasma channel is formed by the discharge inside the ablative capillary. The intense short laser pulse is guided over a 4 cm length. The generated relativistic electrons...

  • Measurements of fast electron scaling generated by petawatt laser systems. Tanimoto, Tsuyoshi; Habara, H.; Kodama, R.; Nakatsutsumi, M.; Tanaka, Kazuo A.; Lancaster, K. L.; Green, J. S.; Scott, R. H. H.; Sherlock, M.; Norreys, Peter A.; Evans, R. G.; Haines, M. G.; Kar, S.; Zepf, M.; King, J.; Ma, T.; Wei, M. S.; Yabuuchi, T.; Beg, F. N.; Key, M. H. // Physics of Plasmas;Jun2009, Vol. 16 Issue 6, p062703 

    Fast electron energy spectra have been measured for a range of intensities between 1018 and 1021 W cm-2 and for different target materials using electron spectrometers. Several experimental campaigns were conducted on petawatt laser facilities at the Rutherford Appleton Laboratory and Osaka...

  • Particle-in-cell simulations of kinetic effects in plasma-based backward Raman amplification in underdense plasmas. Wang, T.-L.; Clark, D. S.; Strozzi, D. J.; Wilks, S. C.; Martins, S. F.; Kirkwood, R. K. // Physics of Plasmas;Feb2010, Vol. 17 Issue 2, p023109 

    A one dimensional particle-in-cell study of the kinetic effects involved in plasma-based backward Raman amplification is presented for nonrelativistic laser pulses interacting in underdense thermal plasmas. Simulations are performed to study how effects such as particle heating and trapping,...

  • Warm relativistic fluid description of the laser wake field accelerator. Yazdanpanah, J.; Anvari, A.; Samimi, J. // Physics of Plasmas;Feb2009, Vol. 16 Issue 2, pN.PAG 

    A warm relativistic ideal fluid theory is proposed to study the dynamics of laser-induced high amplitude longitudinal waves in rarefied plasmas. It is demonstrated that fluid equations may be closed using an adiabatic approximation in the local rest frame of the plasma fluid. It is shown that...

  • Composition of the source region plasma in inertial electrostatic confinement devices. Boris, D. R.; Emmert, G. A. // Physics of Plasmas;Aug2008, Vol. 15 Issue 8, p083502 

    The ion species composition in the source region of inertial electrostatic confinement (IEC) devices plays an important role in the atomic and molecular physics processes in the device and in the resulting energy spectrum of the fast ions and the neutron production rate. A zero dimensional rate...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics