Development of Laser Diagnostics on a Two-terawatt Pulsed Power Accelerator PDF Download
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Author:
Publisher:
ISBN: 9780496121625
Category : Lasers
Languages : en
Pages : 77
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Book Description
An interferometric laser optical diagnostic was developed to analyze plasma behavior and properties in Magnetically Insulated Transmission Lines (MITL) and other high energy density experiments. The diagnostic produces interferograms needing to be analyzed to achieve quantitative data from experiments. Research focused on analyzing interferograms by using Quick Fringe, a commercial software package, showing the plasma density field in experimental interferograms. Issues in analysis included benchmarking Quick Fringe, exploration of vibration effects on reference interferograms used to retrieve data from interferograms containing data, and revealing program limitations. Benchmarking of Quick Fringe shows that interferograms of a lens could be analyzed successfully by utilizing various methods to calculate the lens geometry within +/-0.05 waves. Vibration issues were mitigated by either creating a reference interferogram, or averaging multiple reference interferograms. Quick Fringe calculated the results of the MITL interferogram to have a maximum fringe shift to be ∼0.5 to ∼0.7 waves, which correlates to a plasma density of >2--3 · 1016 cm-3.
Author:
Publisher:
ISBN: 9780496121625
Category : Lasers
Languages : en
Pages : 77
Get Book Here
Book Description
An interferometric laser optical diagnostic was developed to analyze plasma behavior and properties in Magnetically Insulated Transmission Lines (MITL) and other high energy density experiments. The diagnostic produces interferograms needing to be analyzed to achieve quantitative data from experiments. Research focused on analyzing interferograms by using Quick Fringe, a commercial software package, showing the plasma density field in experimental interferograms. Issues in analysis included benchmarking Quick Fringe, exploration of vibration effects on reference interferograms used to retrieve data from interferograms containing data, and revealing program limitations. Benchmarking of Quick Fringe shows that interferograms of a lens could be analyzed successfully by utilizing various methods to calculate the lens geometry within +/-0.05 waves. Vibration issues were mitigated by either creating a reference interferogram, or averaging multiple reference interferograms. Quick Fringe calculated the results of the MITL interferogram to have a maximum fringe shift to be ∼0.5 to ∼0.7 waves, which correlates to a plasma density of >2--3 · 1016 cm-3.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 5
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Book Description
The first proposal for plasma based accelerators was suggested by 1979 by Tajima and Dawson. Since then there has been a tremendous progress both theoretically and experimentally. The theoretical progress is particularly due to the growing interest in the subject and to the development of more accurate numerical codes for the plasma simulations (especially particle-in-cell codes). The experimental progress follows from the development of multi-terawatt laser systems based on the chirped-pulse amplification technique. These efforts have produced results in several experiments world-wide, with the detection of accelerated electrons of tens of MeV. The peculiarity of these advanced accelerators is their ability to sustain extremely large acceleration gradients. In the conventional radio frequency linear accelerators (RF linacs) the acceleration gradients are limited roughly to 100 MV/m; this is partially due to breakdown which occurs on the walls of the structure. The electrical breakdown is originated by the emission of the electrons from the walls of the cavity. The electrons cause an avalanche breakdown when they reach other metal parts of the RF linacs structure.
Author:
Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 1028
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Book Description
Author: Christine Petit-jean-genaz
Publisher: World Scientific
ISBN: 9814550272
Category :
Languages : en
Pages : 2968
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Book Description
These proceedings aim to provide a comprehensive overview of research, technology and applications in the field of accelerators. Contributions from the entire field of accelerators are presented, including low and high energy machines, and medical and industrial accelerators.
Author:
Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 762
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Book Description
Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.
Author: James B Rosenzweig
Publisher: World Scientific
ISBN: 981449237X
Category : Science
Languages : en
Pages : 620
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Book Description
This book contains the proceedings of the 1999 ICFA workshop on the physics of high brightness beams. The workshop took a snapshot in time of a fast moving, interdisciplinary field driven by advanced applications such as high gradient, high energy physics linear colliders, high gain free electron lasers, heavy ion fusion, and transmutation of nuclear materials. While the field of high brightness beam physics has traditionally been divided into disparate electron and heavy ion communities, the workshop brought the two types of researchers together, so that a sharing of insights and methods could be achieved. Thus, this book represents a unifying step in the development of the diverse fascinating discipline of high brightness beam physics, with its challenges rooted in collective, nonlinear particle motion and ultra-high electromagnetic energy density.
Author: Dongsu Du
Publisher:
ISBN:
Category :
Languages : en
Pages : 204
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Book Description
Since 2004, table-top laser-plasma accelerators (LPAs) driven by ~30fs terwatt laser pulses have produced colimated, nearly mono-energetic eletron bunches with energy up to 1 GeV in laboratories around the world. Large-scale computer simulations show that LPAs can scale to higher energy while retaining high beam quality, but will require laser pulses of higher energy and longer duration than current LPAs. The group of Prof. Mike Downer, in collaboration with the Texas Petawatt (TPW) laser team headed by Prof. Todd Ditmire, is setting up an experiment that uses the TPW laser (1.1 PW, 150 fs) to drive the world's first multi-GeV LPA. This thesis provides a general overview of the TPW-LPA project, including several diagnostic systems for the beam, plasma and laser pulse. Special attention is given to three of the diagnostic systems: (1)A transverse interferometry diagnostic of the plasma density profile created by the TPW laser pulse; (2)A Thomson scattering diagnostic of the self-guided path of the TPW laser pulse through the plasma; (3)An optical transition radiation diagnostic of the accelerated electron bunch exiting the plasma. In each case, basic principles, theoretical background, calculation and simulation results, and preliminary experimental results will be presented.
Author:
Publisher:
ISBN:
Category : Controlled fusion
Languages : en
Pages : 130
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Book Description
Author: Paul Schoessow
Publisher: AIP Conference Proceedings (Nu
ISBN:
Category : Science
Languages : en
Pages : 880
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Book Description
The primary purpose of the June 1994 workshop was to study new techniques for generating, accelerating, and colliding high energy beams. In addition to 17 invited papers, the proceedings include technical papers of the six working groups as well as summary papers by the chair of each group. The work
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 456
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Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
