التفاصيل البيبلوغرافية
| العنوان: |
Radiative properties of Z-pinch and laser produced plasmas from mid-atomic-number materials |
| المؤلفون: |
Ouart, Nicholas D. |
| المساهمون: |
Safronova, Alla S., Kantsyrev, Victor L., Winkler, Peter, Struve, Kenneth W., Esaulov, Andrey A, Cline, Joseph |
| سنة النشر: |
2018 |
| المجموعة: |
University of Nevada, Reno: ScholarWorks Repository |
| مصطلحات موضوعية: |
non-LTE kinetic modeling, plasmas, wire arrays, x-ray spectroscopy, z-pinch |
| الوصف: |
The investigation of Z-pinches on university-scale pulsed power generators allows for the study of plasmas with a broad range of temperatures, densities, and sizes in cost effective experiments. In particular, X-pinches produce the hottest and densest plasma and are very suitable for x-ray radiation studies. The planar wire array has shown to be a powerful radiation source on the 1 MA Zebra generator at UNR. The radiative and implosion dynamics from such loads with mid-atomic-number materials were not studied previously in detail and are a topic of this dissertation. Specifically, the radiative and implosion characteristics of Z-pinch and X-pinch plasmas with mid-atomic-number materials (iron, nickel, copper, and zinc) will be discussed. The theoretical tool used to accomplish this is non-LTE kinetic modeling. This tool is not limited to Z-pinches, but can be applied to any plasma radiation source like laser produced plasmas which will be demonstrated. In addition, since the radiative characteristics of wire arrays are connected with the implosion characteristics, another theoretical tool, the Wire Ablation Dynamics Model was used in this dissertation to understand the ablation and implosion dynamics of wire arrays. The experiments were analyzed from two university-scale pulsed power machines: the 1 MA Zebra and COBRA generators. The research completed in this dissertation emphasizes the unique capabilities and usefulness of spectroscopy, particularly time-gated x-ray spectroscopy. For example, modeling of time-gated L-shell spectra captured from the precursor column of low-wire-number copper cylindrical wire arrays reveals electron temperatures ~400 eV, which is significantly higher than any previous precursor measurements. From the analysis of experiments on COBRA, total energy was higher for the implosion of a compact cylindrical wire array made with alternating brass and aluminum wires than a uniform wire array made with just brass or aluminum. Comparison of L-shell radiation from mid-atomic-number wires ... |
| نوع الوثيقة: |
doctoral or postdoctoral thesis |
| وصف الملف: |
PDF |
| اللغة: |
unknown |
| Relation: |
http://hdl.handle.net/11714/4451 |
| الاتاحة: |
http://hdl.handle.net/11714/4451 |
| Rights: |
In Copyright(All Rights Reserved) ; Author(s) |
| رقم الانضمام: |
edsbas.DB71DF2B |
| قاعدة البيانات: |
BASE |