TY - JOUR
T1 - Generation of short pulse radiation from magnetized wake in gas-jet plasma and laser interaction
AU - Dorranian, Davoud
AU - Ghoranneviss, Mahmood
AU - Starodubtsev, Mikhail
AU - Ito, Hiroaki
AU - Yugami, Noboru
AU - Nishida, Yasushi
N1 - Funding Information:
We would like to acknowledge Prof. Michael I. Bakunov with Department of Radiophysics, State University of Nizhny Novgorod, Russia for his very useful discussions and Dr. Higashiguchi with Department of Electrical and Electronic Engineering, Miyazaki University of Japan for his useful technical supports. We also are grateful to Cooperative Research Center and Satellite Venture Business Laboratory (SVBL) of Utsunomiya University for providing us the laser system. A part of the work is supported by the Grant-in-Aid in Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology, Japan.
PY - 2004/10/11
Y1 - 2004/10/11
N2 - New features of a high power tunable radiation from the magnetized plasma wakes are studied. This Letter covers some aspects of the problem, which was previously discussed in details in [Phys. Rev. E 68 (2003) 026409]. A gas-jet flow is used to generate the sharp boundary plasma. Wakefield is excited by a mode locked Ti:sapphire laser beam operating at 800 nm wavelength with the pulse width of 100 fs (FWHM) and maximum energy of 100 mJ per pulse with 10 Hz repetition rate. The neutral density of gas-jet flow is measured with a Mach-Zehnder interferometer. Strength of the applied external dc magnetic field normal to the direction of laser pulse propagation varies from 0 to 8 kG in the interaction region. Radiation is observed, in the forward direction due to the axial component of the magnetized wakefield and in the normal direction due to the radial component of the magnetized wakefield, both perpendicular to the direction of the applied magnetic field. The frequency of the emitted radiation with the pulse width of 200 ps (detection limit), measured by the method of time-of-flight, is in the millimeter wave range. Radiations are polarized perpendicularly to the laser pulse propagation direction and dc magnetic field lines as is expected from the theory. Electrodynamic properties of the radiation have been studied at different plasma densities and magnetic field strengths.
AB - New features of a high power tunable radiation from the magnetized plasma wakes are studied. This Letter covers some aspects of the problem, which was previously discussed in details in [Phys. Rev. E 68 (2003) 026409]. A gas-jet flow is used to generate the sharp boundary plasma. Wakefield is excited by a mode locked Ti:sapphire laser beam operating at 800 nm wavelength with the pulse width of 100 fs (FWHM) and maximum energy of 100 mJ per pulse with 10 Hz repetition rate. The neutral density of gas-jet flow is measured with a Mach-Zehnder interferometer. Strength of the applied external dc magnetic field normal to the direction of laser pulse propagation varies from 0 to 8 kG in the interaction region. Radiation is observed, in the forward direction due to the axial component of the magnetized wakefield and in the normal direction due to the radial component of the magnetized wakefield, both perpendicular to the direction of the applied magnetic field. The frequency of the emitted radiation with the pulse width of 200 ps (detection limit), measured by the method of time-of-flight, is in the millimeter wave range. Radiations are polarized perpendicularly to the laser pulse propagation direction and dc magnetic field lines as is expected from the theory. Electrodynamic properties of the radiation have been studied at different plasma densities and magnetic field strengths.
UR - http://www.scopus.com/inward/record.url?scp=4644271450&partnerID=8YFLogxK
U2 - 10.1016/j.physleta.2004.08.027
DO - 10.1016/j.physleta.2004.08.027
M3 - 学術論文
AN - SCOPUS:4644271450
SN - 0375-9601
VL - 331
SP - 77
EP - 83
JO - Physics Letters, Section A: General, Atomic and Solid State Physics
JF - Physics Letters, Section A: General, Atomic and Solid State Physics
IS - 1-2
ER -