APL Nameplate
  • Volume/Page
  • Keyword
  • DOI
  • Citation
  • Advanced
   
 
 
 

Flickr Twitter iResearch App Facebook

BROWSE VOLUMES

Year Range: 
Search Issue | RSS Feeds RSS
Previous Issue Next Issue

25 Jan 2010

Volume 96, Issue 4, Articles (04xxxx)

Issue Cover Spotlight Figure

Appl. Phys. Lett. 96, 042501 (2010); http://dx.doi.org/10.1063/1.3291942 (3 pages)

Daniel Stickler, Robert Frömter, Holger Stillrich, Christian Menk, Carsten Tieg, Simone Streit-Nierobisch, Michael Sprung, Christian Gutt, Lorenz-M. Stadler, Olaf Leupold, Gerhard Grübel, and Hans Peter Oepen
Enlarge Image | Read More
Return to All Sections
back to top
RSS Feeds

Finite element analysis of ring-shaped emission profile in plasma bullet

Yukinori Sakiyama, David B. Graves, Julien Jarrige, and Mounir Laroussi

Appl. Phys. Lett. 96, 041501 (2010); http://dx.doi.org/10.1063/1.3298639 (3 pages) | Cited 23 times

Online Publication Date: 26 January 2010

Full Text: Read Online (HTML) | Download PDF

Show Abstract
Using a one-way coupled model of neutral gas flow and plasma dynamics we report a mechanism to explain the ring-shaped emission pattern that has been observed experimentally in plasma bullets at atmospheric pressure. We solve a fluid model with the local field approximation in one-dimensional cylindrical coordinates, corresponding to a cross-section of a plasma bullet. Pulselike uniform electric field is assumed to be applied perpendicular to the simulation domain. Time and spatially resolved spectroscopic measurements support the simulation results.
Show PACS
52.30.-q Plasma dynamics and flow
52.25.Os Emission, absorption, and scattering of electromagnetic radiation
52.65.-y Plasma simulation
52.70.Kz Optical (ultraviolet, visible, infrared) measurements

A large gap of radio frequency dielectric barrier atmospheric pressure glow discharge

B. Li, Q. Chen, and Z. W. Liu

Appl. Phys. Lett. 96, 041502 (2010); http://dx.doi.org/10.1063/1.3299010 (3 pages) | Cited 9 times

Online Publication Date: 27 January 2010

Full Text: Read Online (HTML) | Download PDF

Show Abstract
A large gap was acquired between electrodes (up to 5.5 mm) of Ar atmospheric pressure glow discharge in radio frequency dielectric barrier discharge (rf-DBD). The discharge of Ar plasma was characterized by I-V curve and Lissajous plot, and the effective power of the discharge was calculated based on the measured Lissajous plot and found to be higher than 90% of the input power. To gain a thorough understanding of the mechanism, the rf-DBD with a single dielectric barrier layer operating in γ mode glow discharge of N2 plasma was diagnosed in spatial resolution through optical emission spectroscopy. It was concluded that secondary electron emission might be responsible for the sustainable glow discharge in the large gap rf-DBD plasma.
Show PACS
52.80.Pi High-frequency and RF discharges
52.80.Hc Glow; corona
52.25.Tx Emission, absorption, and scattering of particles
52.70.Ds Electric and magnetic measurements
52.70.Kz Optical (ultraviolet, visible, infrared) measurements

Experimental observation of the transition from nonlocal to local electron kinetics in inductively coupled plasmas

Hyo-Chang Lee, Min-Hyong Lee, and Chin-Wook Chung

Appl. Phys. Lett. 96, 041503 (2010); http://dx.doi.org/10.1063/1.3291038 (3 pages) | Cited 20 times

Online Publication Date: 28 January 2010

Full Text: Read Online (HTML) | Download PDF

Show Abstract
The transition from nonlocal to local kinetics was observed through the spatially resolved measurements of electron energy distribution functions in inductively coupled plasmas. As gas pressures increase, the spatial profiles of the effective electron temperatures (Teff) from the electron energy distribution functions changed dramatically from hollow shapes to flat shapes. With further increases in gas pressures, the Teff had saddle-shaped profiles with the highest Teff in the vicinity of an antenna coil. These changes in the radial profiles of the Teff show a transition of the electron kinetics from nonlocal to local regimes. This transition occurred when the electron energy relaxation lengths became smaller than the antenna half size.
Show PACS
52.25.-b Plasma properties
52.70.-m Plasma diagnostic techniques and instrumentation

Efficient generation and transportation of energetic electrons in a carbon nanotube array target

Yanling Ji, Gang Jiang, Weidong Wu, Chaoyang Wang, Yuqiu Gu, and Yongjian Tang

Appl. Phys. Lett. 96, 041504 (2010); http://dx.doi.org/10.1063/1.3298016 (3 pages) | Cited 6 times

Online Publication Date: 28 January 2010

Full Text: Read Online (HTML) | Download PDF

Show Abstract
Laser-driven energetic electron propagation in a carbon nanotube-array target is investigated using two-dimensional particle-in-cell simulations. Energetic electrons are efficiently generated when the array is irradiated by a short intense laser pulse. Confined and guided transportation of energetic electrons in the array is achieved by exploiting strong transient electromagnetic fields created at the wall surfaces of nanotubes. The underlying mechanisms are discussed in detail. Our investigation shows that the laser energy can be transferred more effectively to the target electrons in the array than that of in the flat foil due to the hole structures in the array.
Show PACS
79.70.+q Field emission, ionization, evaporation, and desorption
79.20.Ds Laser-beam impact phenomena

Plasma characterization using terahertz-wave-enhanced fluorescence

Jingle Liu and X.-C. Zhang

Appl. Phys. Lett. 96, 041505 (2010); http://dx.doi.org/10.1063/1.3291676 (3 pages) | Cited 6 times

Online Publication Date: 29 January 2010

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We demonstrate that the terahertz-wave-enhanced fluorescence emission from excited atoms or molecules can be employed in the characterization of laser-induced gas plasmas. The electron relaxation time and plasma density were deduced through applying the electron impact excitation/ionization and electron-ion recombination processes to the measured time-dependent enhanced fluorescence. The electron collision dynamics of nitrogen plasma excited at different gas pressures and laser pulse energies have been systematically investigated. This plasma characterization method provides picosecond temporal resolution and enables omnidirectional optical signal collection.
Show PACS
52.25.Os Emission, absorption, and scattering of electromagnetic radiation
52.50.Jm Plasma production and heating by laser beams (laser-foil, laser-cluster, etc.)
52.20.Fs Electron collisions
Return to All Sections
Close

Google Calendar

ADVERTISEMENT

Go to AIP Home   © AIP Publishing LLC
close