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# IEEE Transactions on Plasma Science

## Issue 12  Part 2 • Dec. 2012

This issue contains several parts.Go to:  Part 1  | Part 3

## Filter Results

Displaying Results 1 - 25 of 31

Publication Year: 2012, Page(s):C1 - 3185
| PDF (44 KB)
• ### IEEE Transactions on Plasma Science publication information

Publication Year: 2012, Page(s): C2
| PDF (135 KB)
• ### Guest Editorial Special Issue on Z-Pinch Plasmas

Publication Year: 2012, Page(s):3186 - 3188
| PDF (210 KB) | HTML
• ### The Dense Plasma Focus: A Versatile Dense Pinch for Diverse Applications

Publication Year: 2012, Page(s):3189 - 3221
Cited by:  Papers (47)
| | PDF (3145 KB) | HTML

The dense plasma focus (DPF) is a Z-pinch that has been studied for 50 years. Within ten years of its discovery by Fillipov and Fillipova in Russia and Mather in the USA, this dense pinch was scaled up to 2-MA currents and neutron outputs of ~ 1012/pulse. More remarkable is the fact that most of the relevant physics and scaling laws were elucidated within this first decade. The s... View full abstract»

• ### Magnetically Driven Implosions for Inertial Confinement Fusion at Sandia National Laboratories

Publication Year: 2012, Page(s):3222 - 3245
Cited by:  Papers (41)
| | PDF (2210 KB) | HTML

High current pulsed-power generators efficiently store and deliver magnetic energy to z-pinch targets. We review applications of magnetically driven implosions (MDIs) to inertial confinement fusion. Previous research on MDIs of wire-array z-pinches for radiation-driven indirect-drive target designs is summarized. Indirect-drive designs are compared with new targets that are imploded by direct appl... View full abstract»

• ### Plasma Pinch Research on University Pulsed-Power Generators in the United States

Publication Year: 2012, Page(s):3246 - 3264
Cited by:  Papers (6)
| | PDF (2869 KB) | HTML

This paper covers ongoing research on pulsed-power-produced plasmas using wire arrays and foil loads at four universities in the U.S. It is directed toward prospective and current students, as well as program managers at government agencies, and others who have a general interest in applications of pulsed power. This paper presents several pinch configurations (Z-pinches, X-pinches, ... View full abstract»

• ### Density Distributions During the Neutron-Producing Phase of the Plasma Focus POSEIDON

Publication Year: 2012, Page(s):3265 - 3272
Cited by:  Papers (3)
| | PDF (1792 KB) | HTML

Interferometric density measurements revealed the existence of various phases in the neutron emission of the POSEIDON plasma focus, i.e., a compression to a minimum diameter of about 15 mm, followed by a slightly expanded quiescent phase (25 mm in diameter), an instability phase, and finally, a decay of the dense plasma structures. Maximum densities are in the range of 1019 cm-3. The do... View full abstract»

• ### Drive Parameter of Neutron-Optimized Dense Plasma Foci

Publication Year: 2012, Page(s):3273 - 3279
Cited by:  Papers (8)
| | PDF (358 KB) | HTML

A dense plasma focus is being studied as a source of fusion neutrons. Lee and Serban noticed ( IEEE Trans. Plasma Sci., vol. 24, no. 3, pp. 1101-1105, 1996) that neutron-optimized Mather-type plasma foci have an almost constant drive parameter I0/(a√(ρ0)). The origin of this parameter goes back to the 1960s. Recently, it has been pointed out that t... View full abstract»

• ### Neutron Emission Characteristics of NX-3 Plasma Focus Device: Speed Factor as the Guiding Rule for Yield Optimization

Publication Year: 2012, Page(s):3280 - 3289
Cited by:  Papers (12)
| | PDF (1461 KB) | HTML

This paper reports the results of characterization and optimization experiments carried out on a newly developed NX-3 dense plasma focus device (20 kJ at 20 kV, a quarter time period of ~ 3 μs, and 10 kJ/600 kA at 14 kV) at the Plasma Radiation Source Laboratory, NIE, Nanyang Technological University, Singapore. Initial experiments were conducted with an electrode assembly configuration hav... View full abstract»

• ### Numerical Experiments in Plasma Focus Operated in Various Gases

Publication Year: 2012, Page(s):3290 - 3297
Cited by:  Papers (22)
| | PDF (612 KB) | HTML

We adapted the Lee Model code as a branch version RADPF5.15K to gases of special interest to us, namely, nitrogen and oxygen and applied numerical experiments specifically to our AECS PF-1 and AECS PF-2. We also generalized the numerical experiments to other machines and other gases to look at scaling laws and to explore recently uncovered insights and concepts. The required thermodynamic data of ... View full abstract»

• ### Neutron Production From a Small Modified Plasma Focus Device

Publication Year: 2012, Page(s):3298 - 3302
Cited by:  Papers (1)
| | PDF (730 KB) | HTML

In this paper, the results are presented of the study of the pinch evolution in the modified small plasma-focus device at the current peak of 200 kA and with a deuterium filling. The disk conducting the cathode was placed 1 cm in front of the inner electrode (anode). The neutron yield reached 106-108 per shot. The evolution of the plasma was imaged with four pinhole XUV frame... View full abstract»

• ### Matter–Antimatter Relativistic Ambiplasma Pinch

Publication Year: 2012, Page(s):3303 - 3307
| | PDF (139 KB) | HTML

An ambiplasma is a plasma made from matter and antimatter. We study here the property of such plasma at relativistic energy, which is made of counterstreaming electron and positron beams, and its extension to a hydrogen-antihydrogen ambiplasma pinch configuration, where the pinch current is made up from counterstreaming electrons and positrons at relativistic energy. Being very much as intense as ... View full abstract»

• ### Control of Taper-Pinch Plasma by Geometrical Parameters of Capillary

Publication Year: 2012, Page(s):3308 - 3312
| | PDF (666 KB) | HTML

We propose a new type of plasma source with a tapered pinch discharge to form dense, high-speed plasmas. Parameters controlling the behavior are indicated by considering the pinching dynamics of current sheet based on a 1-D equation of motion. The basic behavior of the plasma has been characterized as a function of those parameters using a prototype device. Results indicate that the plasma flux an... View full abstract»

• ### Ablation and Precursor Formation in Copper Wire-Array and Liner $Z$-Pinches

Publication Year: 2012, Page(s):3313 - 3318
Cited by:  Papers (4)
| | PDF (499 KB) | HTML

Density maps of the r-θ plane are presented for two basic types of loads with the same total mass and overall dimensions: wire arrays and cylindrical liners. The wire-array load shows complex interactions of the ablation streams, leading to a well-developed precursor plasma on the axis. Some of the liner loads were near-perfect cylinders, whereas other liners had small perturbations ... View full abstract»

• ### Observations of Ablation Dynamics in Wire-Array $Z$-Pinch Experiments on the Llampüdkeñ Generator

Publication Year: 2012, Page(s):3319 - 3323
Cited by:  Papers (3)
| | PDF (521 KB) | HTML

Wire-array Z-pinch experiments have been performed on the Llampüdkeñ generator (~470 kA in ~410 ns) [Chuaqui et al., Laser Part. Beams 15, 241 (1997)] using an overmassed load of aluminum wires. Time-resolved optical laser schlieren and extreme ultraviolet imaging were used in order to study the plasma ablation dynamics. The results show the formation and subsequent ablation of plas... View full abstract»

• ### Experimental Analysis of the Acceleration Region in Tungsten Wire Arrays

Publication Year: 2012, Page(s):3324 - 3328
Cited by:  Papers (3)
| | PDF (807 KB) | HTML

We present the first analysis of the ablated plasma flow acceleration region in tungsten cylindrical wire arrays within 1 mm of the wire core. We apply a recently developed modification to the Lebedev rocket model to infer the 2-D distribution of effective velocities which redistribute the array mass as a function of time. From these data, it is possible to directly observe the acceleration region... View full abstract»

• ### X-Ray Backlighting of the Initial Stage of Single- and Multiwire $Z$ -Pinch

Publication Year: 2012, Page(s):3329 - 3333
Cited by:  Papers (5)
| | PDF (676 KB) | HTML

The initial stage of single- and multiwire Z-pinch was investigated by X-ray backlighting using an X-pinch as the soft X-ray source. The experiments were carried out on the pulsed power generator PPG-I (400 kA/500 kV/100 ns), which was designed and constructed by Tsinghua University. The source X -pinch and object single- or multiwire Z-pinch are installed in the place ... View full abstract»

• ### Demonstration of Radiation Pulse-Shaping Capabilities Using Nested Conical Wire-Array $Z$-Pinches

Publication Year: 2012, Page(s):3334 - 3346
Cited by:  Papers (1)
| | PDF (1501 KB) | HTML

We present data from experiments using nested wire-array Z -pinches where the wires of one of the arrays (the outer or inner array) are inclined to produce a cone. The use of these nested conical arrays can potentially provide a valuable tool in X-ray radiation pulse shaping for Z-pinch-driven high-yield inertial-confinement-fusion schemes. Conical nested arrays can produce a zippere... View full abstract»

• ### Producing Kiloelectronvolt L-Shell Plasmas on Zebra at UNR

Publication Year: 2012, Page(s):3347 - 3353
Cited by:  Papers (3)
| | PDF (933 KB) | HTML

Experiments with various wire loads from mid-atomic-number wires, which were performed on the university-scale 1-MA Zebra generator at the University of Nevada, Reno, during the last few years, are analyzed to assess the highest electron temperature reached. In particular, the results from experiments with planar wire arrays (PWAs) were considered. Load materials from mid-atomic-number such as sta... View full abstract»

• ### X-Ray Emission From a Tabletop $X$-Pinch Device

Publication Year: 2012, Page(s):3354 - 3359
Cited by:  Papers (1)
| | PDF (795 KB) | HTML

Based on a compact (2 m × 1 m × 1.5 m) pulsed-current generator (~100 kA and 60 ns), a tabletop X-pinch device was constructed and tested. The load current was almost unchanged for X-pinches made using different wires (5-, 8-, 10-, and 13-μm W wires and 13- and 25-μm Mo wires), which means that the impedance of the wires is much lower than the total impedance of the loa... View full abstract»

• ### Numerical Study of Quasi-Spherical Wire-Array Implosions on the QiangGuang-I Facility

Publication Year: 2012, Page(s):3360 - 3366
Cited by:  Papers (1)
| | PDF (903 KB) | HTML

The magnetic pressure on a (quasi-)spherical load surface increases with the latitude. To achieve quasi-spherical implosions, load parameters should be adjusted to counterpoise the asymmetry of Lorentz force. The implosion quality can be enhanced by redistributing the mass density of a spherical load or changing its initial shape to a prolate one; the latter is more practical for wire-array fabric... View full abstract»

• ### Cable Array $Z$-Pinch Experiments at 1 MA

Publication Year: 2012, Page(s):3367 - 3371
Cited by:  Papers (1)
| | PDF (760 KB) | HTML

Individual wires in a Z-pinch were replaced with twisted pairs of wires, i.e., “cables.” We define a cable here as two or more fine wires twisted together to form a continuous strand with a twist wavelength λt, dependent on the number of twists per unit length. Imploding Al cable array Z-pinches show a λt-dependent increase in peak po... View full abstract»

• ### Characterization of Fine Metallic Wires for Wire-Array $Z$-Pinch Experiments

Publication Year: 2012, Page(s):3372 - 3377
| | PDF (766 KB) | HTML

The Z Facility at Sandia National Laboratories can produce >;2 MJ of X-ray energy with peak powers >;280 TW. Achieving optimal load performance requires the control of the implosion time of the Z-pinch with respect to the current pulse shape from the pulsed-power driver. Additionally, accurate estimates of the implosion time are required for the precise timing of diagnostics used to s... View full abstract»

• ### High-Resolution UV Laser Diagnostics on the 1-MA Zebra Generator

Publication Year: 2012, Page(s):3378 - 3383
Cited by:  Papers (4)
| | PDF (1146 KB) | HTML

Laser diagnostics at the wavelength of 266 nm with a spatial resolution of 5-8 μm were developed for the investigation of dense Z-pinches at the 1-MA generator. The absorption and refraction in Z-pinch plasma are significantly smaller at the ultraviolet (UV) wavelength of 266 nm compared to the optical range. This allows for observation of the fine internal structure of Z View full abstract»

• ### Digital Interferometry Applied to Transient Dense Plasmas

Publication Year: 2012, Page(s):3384 - 3389
Cited by:  Papers (3)
| | PDF (1307 KB) | HTML

The work presented in this paper proposes a simple interferometric technique of recording and digital processing, which allows the obtaining of three possible interferometric records of variations at the refraction index, both in large scale and in small scale. The experimental setup basically consists of the Mach-Zehnder interferometer and a digital camera (with CMOS technology) coupled to a PC. ... View full abstract»

## Aims & Scope

IEEE Transactions on Plasma Sciences focuses on plasma science and engineering, including: magnetofluid dynamics and thermionics; plasma dynamics; gaseous electronics and arc technology.

Full Aims & Scope

## Meet Our Editors

Editor-in-Chief
Steven J. Gitomer, Ph.D.
Senior Scientist, US Civilian Research & Development Foundation
Guest Scientist, Los Alamos National Laboratory
1428 Miracerros Loop South
Santa Fe, NM  87505  87505  USA
tps-editor@ieee.org
Phone:505-988-5751
Fax:505-988-5751 (call first)