Analytical study of crossed atom-laser beam plasma diagnostics

1976 ◽  
Vol 15 (3) ◽  
pp. 381-388
Author(s):  
Kaare J. Nygaard
Keyword(s):  
Laser Beam ◽  
Analytical Study ◽  
Ion Beam ◽  
Hydrogen Plasma ◽  
Forward Direction ◽  
Beam Diagnostics ◽  
Plasma Region ◽  
Atom Beam ◽  
First Approximation ◽  
Electric And Magnetic Fields

A new method using crossed laser and atom beams within a plasma is capable of determining the electron density with a spatial resolution of 1 mm and a time resolution of 2–5 nsec. The measurement is done in the forward direction of the atom beam and is to a first approximation independent of electric and magnetic fields inside and outside the plasma region. A calculation is carried out for a neutral cesium beam probing a fully ionized hydrogen plasma. It is pointed out that a laser beam can also be combined with available ion beam diagnostics.

Binary diffractive elements for CO2 laser beam diagnostics

1996 ◽  
Author(s):  
Christian Hembd-Soellner ◽  
Christel Budzinski ◽  
Hans J. Tiziani
Keyword(s):  
Laser Beam ◽  
Beam Diagnostics

scholarly journals Simulation codes for light-ion diode modeling

1994 ◽  
Vol 12 (2) ◽  
pp. 283-324 ◽  
Author(s):  
J.P. Quintenz ◽  
D.B. Seidel ◽  
M.L. Kiefer ◽  
T.D. Pointon ◽  
R.S. Coats ◽  
...  
Keyword(s):  
Inertial Confinement Fusion ◽  
Power Flow ◽  
Ion Beam ◽  
Inertial Confinement ◽  
Beam Diagnostics ◽  
Computational Tools ◽  
Field Diffusion ◽  
Confinement Fusion ◽  
Computer Codes ◽  
Inertial Confinement Fusion Program

The computational tools used in the investigation of light-ion diode physics at Sandia National Laboratories are described. Applied-B ion diodes are used to generate intense beams of ions and focus these beams onto targets as part of Sandia's inertial confinement fusion program. Computer codes are used to simulate the energy storage and pulse forming sections of the accelerator and the power flow and coupling into the diode where the ion beam is generated. Other codes are used to calculate the applied magnetic field diffusion in the diode region, the electromagnetic fluctuations in the anode-cathode gap, the subsequent beam divergence, the beam propagation, and response of various beam diagnostics. These codes are described and some typical results are shown.

Hydrogen-plasma etching of ion beam deposited c-BN films: An in situ investigation of the surface with electron spectroscopy

2000 ◽  
Vol 88 (10) ◽  
pp. 5597-5604 ◽  
Author(s):  
P. Reinke ◽  
P. Oelhafen ◽  
H. Feldermann ◽  
C. Ronning ◽  
H. Hofsäss
Keyword(s):  
Plasma Etching ◽  
Electron Spectroscopy ◽  
Ion Beam ◽  
Hydrogen Plasma ◽  
In Situ Investigation

LONGITUDINAL WAVES IN AN INHOMOGENEOUS MAGNETIC FIELD – PLASMA INTERFACE BASED ON THE WKB APPROXIMATION

1963 ◽  
Vol 41 (4) ◽  
pp. 569-580
Author(s):  
I. P. Shkarofsky
Keyword(s):  
Magnetic Field ◽  
Boundary Layer ◽  
Ion Beam ◽  
Inhomogeneous Magnetic Field ◽  
Wave Number ◽  
Plasma Region ◽  
Order Solution ◽  
Uniform Medium ◽  
Magnetic Field Region ◽  
Point To Point

Longitudinal perturbations are investigated which propagate in an inhomogeneous interface or transition boundary layer, from a plasma region where no magnetic field exists well within its interior, to a static magnetic field region from which the plasma is excluded. The inhomogeneity in this boundary layer is the prime inhomogeneity considered here. A WKB solution is obtained for waves whose wavelength is small compared with the equilibrium characteristic length. The component of the propagation wave number is assumed to vary in the direction in which the interface is inhomogeneous. From the zero-order solution it is shown that this wave number satisfies the same relation with the frequency of perturbation and velocities of the electron and ion beams, as that obtained in counter-streaming of an electron-plus-ion beam against another electron-plus-ion beam in a uniform medium. The first-order solution yields the manner in which the amplitude of the wave varies from point to point in the plasma interface. The physical significance of these modes and the time and space variation of these waves will be discussed. It is shown that the WKB solution is valid in the sheath up to quite small distances from the sheath boundary. Under certain conditions, a wave can exist which increases exponentially in time and whose amplitude increases towards the boundary. The problem of joining the WKB solution appropriately to a perturbed solution outside of the boundary is discussed.

ChemInform Abstract: LASER BEAM-ION BEAM PHOTODISSOCIATION STUDIES OF C6H6+ RADICAL CATIONS: THE 2,4-HEXADIYNE SYSTEM

1985 ◽  
Vol 16 (34) ◽  
Author(s):  
R. E. KRAILLER ◽  
D. H. RUSSELL ◽  
M. F. JARROLD ◽  
M. T. BOWERS
Keyword(s):  
Laser Beam ◽  
Ion Beam ◽  
Radical Cations

THE NEW LOW ENERGY ION BEAM ANALYSIS FACILITY AT MAPUTO UNIVERSITY

1995 ◽  
Vol 05 (04) ◽  
pp. 249-253
Author(s):  
R.J. UTUI ◽  
N.P.O. HOMMAN ◽  
K.G. MALMQVIST
Keyword(s):  
Ion Beam ◽  
Low Energy ◽  
Proton Accelerator ◽  
Nuclear Reaction Analysis ◽  
Beam Diagnostics ◽  
Ion Beam Analysis ◽  
X Ray ◽  
Beam Analysis ◽  
Set Up ◽  
Eduardo Mondlane University

A new Ion Beam Analysis (IBA) facility which was recently installed in the Department of Physics of the Eduardo Mondlane University of Maputo, Mozambique, is described. The set up is based on a low energy (500 keV) Van de Graaff proton accelerator and is intended to be used in particle induced X-ray emission (PIXE), Rutherford Backscattering (RBS) and nuclear reaction analysis (NRA). Preliminary experiments on beam diagnostics were performed successfully and the followed procedure is described.

Sign in / Sign up

Export Citation Format

Share Document