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Ablative stabilization of the Rayleigh-Taylor instability in regimes relevant to inertial confinement fusion
As shown elsewhere an ablatively imploded shell is hydrodynamically unstable, the dominant instability being the well known Rayleigh-Taylor instability with growth rate {gamma} = {radical}Akg where k = 2{pi}/{lambda} is the wave number, g is the acceleration and A the Attwood number ({rho}{sub hi} {minus} {rho}{sub lo})/({rho}{sub hi} + {rho}{sub lo}) where {rho}{sub hi} is the density of the heavier fluid and {rho}{sub lo} is the density of the lighter fluid. A theoretical understanding of ablative stabilization has gradually evolved, confirmed over the last five years by experiments. The linear growth is very well understood with excellent agreement between experiment and simulation for planar geometry with wavelengths in the region of 30--100{mu}m. There is an accurate, albeit phenomenological dispersion relation. The non-linear growth has been measured and agrees with calculations. In this lecture, the authors go into the fundamentals of the Rayleigh-Taylor instability and the experimental measurements that show it is stabilized sufficiently by ablation in regimes relevant to ICF.
Date:
August 4, 1994
Creator:
Kilkenny, J. D.
Object Type:
Article
System:
The UNT Digital Library
Sns Accumulator Ring Design and Space Charge Considerations
The goal of the proposed Spallation Neutron Source (SNS) is to provide a short pulse proton beam of about 0.5{micro}s with average beam power of 1MW. To achieve such purpose, a proton storage ring operated at 60Hz with 1 x 10{sup 14} protons per pulse at 1GeV is required. The Accumulator Ring (AR) receives 1msec long H{sup {minus}} beam bunches of 28mA from a 1GeV linac. Scope and design performance goals of the AR are presented. About 1,200 turns of charge exchange injection is needed to accumulate 1mA in the ring. After a brief description of the lattice design and machine performance parameters, space charge related issues, such as: tune shifts, stopband corrections, halo generation and beam collimation etc. is discussed.
Date:
May 4, 1998
Creator:
Weng, W. T.
Object Type:
Article
System:
The UNT Digital Library
Laser driven instabilities in inertial confinement fusion
Parametric instabilities excited by an intense electromagnetic wave in a plasma is a fundamental topic relevant to many applications. These applications include laser fusion, heating of magnetically-confined plasmas, ionospheric modification, and even particle acceleration for high energy physics. In laser fusion, these instabilities have proven to play an essential role in the choice of laser wavelength. Characterization and control of the instabilities is an ongoing priority in laser plasma experiments. Recent progress and some important trends will be discussed. 8 figs.
Date:
June 4, 1990
Creator:
Kruer, W.L.
Object Type:
Article
System:
The UNT Digital Library
Perry Daily Journal (Perry, Okla.), Vol. 103, No. 201, Ed. 1 Friday, October 4, 1996
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
October 4, 1996
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Perry Daily Journal (Perry, Okla.), Vol. 97, No. 98, Ed. 1 Monday, June 4, 1990
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
June 4, 1990
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Perry Daily Journal (Perry, Okla.), Vol. 101, No. 304, Ed. 1 Saturday, February 4, 1995
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
February 4, 1995
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Perry Daily Journal (Perry, Okla.), Vol. 103, No. 175, Ed. 1 Wednesday, September 4, 1996
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
September 4, 1996
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Perry Daily Journal (Perry, Okla.), Vol. 100, No. 149, Ed. 1 Wednesday, August 4, 1993
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
August 4, 1993
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Perry Daily Journal (Perry, Okla.), Vol. 100, No. 228, Ed. 1 Thursday, November 4, 1993
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
November 4, 1993
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Perry Daily Journal (Perry, Okla.), Vol. 100, No. 71, Ed. 1 Tuesday, May 4, 1993
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
May 4, 1993
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Perry Daily Journal (Perry, Okla.), Vol. 100, No. 277, Ed. 1 Tuesday, January 4, 1994
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
January 4, 1994
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Perry Daily Journal (Perry, Okla.), Vol. 102, No. 175, Ed. 1 Monday, September 4, 1995
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
September 4, 1995
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Perry Daily Journal (Perry, Okla.), Vol. 97, No. 176, Ed. 1 Tuesday, September 4, 1990
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
September 4, 1990
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Perry Daily Journal (Perry, Okla.), Vol. 98, No. 98, Ed. 1 Tuesday, June 4, 1991
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
June 4, 1991
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Perry Daily Journal (Perry, Okla.), Vol. 101, No. 98, Ed. 1 Saturday, June 4, 1994
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
June 4, 1994
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Perry Daily Journal (Perry, Okla.), Vol. 97, No. 278, Ed. 1 Friday, January 4, 1991
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
January 4, 1991
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Perry Daily Journal (Perry, Okla.), Vol. 98, No. 202, Ed. 1 Friday, October 4, 1991
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
October 4, 1991
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Perry Daily Journal (Perry, Okla.), Vol. 98, No. 176, Ed. 1 Wednesday, September 4, 1991
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
September 4, 1991
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Clifton Record (Clifton, Tex.), Vol. 103, No. 97, Ed. 1 Friday, December 4, 1998
Semi-weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
December 4, 1998
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
The Clifton Record (Clifton, Tex.), Vol. 97, No. 10, Ed. 1 Wednesday, March 4, 1992
Weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
March 4, 1992
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
Perry Daily Journal (Perry, Okla.), Vol. 99, No. 98, Ed. 1 Thursday, June 4, 1992
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
June 4, 1992
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Perry Daily Journal (Perry, Okla.), Vol. 101, No. 149, Ed. 1 Thursday, August 4, 1994
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
August 4, 1994
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Clifton Record (Clifton, Tex.), Vol. 103, No. 71, Ed. 1 Friday, September 4, 1998
Semi-weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
September 4, 1998
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
The Clifton Record (Clifton, Tex.), Vol. 99, No. 18, Ed. 1 Wednesday, May 4, 1994
Weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
May 4, 1994
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History