東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

Multi-frequency beam-shaping mirror ...

The University of Wisconsin - Madison.

FindBook

Google Book

Amazon

博客來

Multi-frequency beam-shaping mirror system design for high-power gyrotrons: Theory, algorithms and methods.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Multi-frequency beam-shaping mirror system design for high-power gyrotrons: Theory, algorithms and methods./
作者:	Liao, Shaolin.
面頁冊數:	245 p.
附註:	Adviser: Ronald J. Vernon.
Contained By:	Dissertation Abstracts International69-05B.
標題:	Engineering, Electronics and Electrical. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3314260
ISBN:	9780549633167

Multi-frequency beam-shaping mirror system design for high-power gyrotrons: Theory, algorithms and methods.
Liao, Shaolin.

Multi-frequency beam-shaping mirror system design for high-power gyrotrons: Theory, algorithms and methods. - 245 p.

Adviser: Ronald J. Vernon.

Thesis (Ph.D.)--The University of Wisconsin - Madison, 2008.

The design has been successfully verified (independently) by Dr. Jeffrey Neilson using a completely different method, the Method of Moments.

ISBN: 9780549633167Subjects--Topical Terms:

626636
Engineering, Electronics and Electrical.

Multi-frequency beam-shaping mirror system design for high-power gyrotrons: Theory, algorithms and methods.
LDR:03202nmm 2200325 a 45 001 867475
005 20100804
008 100804s2008 ||||||||||||||||| ||eng d
020 $a 9780549633167
035 $a (UMI)AAI3314260
035 $a AAI3314260
040 $a UMI $c UMI
100 1 $a Liao, Shaolin. $3 1036210
245 1 0 $a Multi-frequency beam-shaping mirror system design for high-power gyrotrons: Theory, algorithms and methods.
300 $a 245 p.
500 $a Adviser: Ronald J. Vernon.
500 $a Source: Dissertation Abstracts International, Volume: 69-05, Section: B, page: 3184.
502 $a Thesis (Ph.D.)--The University of Wisconsin - Madison, 2008.
520 $a The design has been successfully verified (independently) by Dr. Jeffrey Neilson using a completely different method, the Method of Moments.
520 $a The goal of this research is to design a four-reflector system (of good metal conductor, e.g., of aluminum or copper) to shape four roughly Gaussian beams of different frequencies into one specified high-quality Gaussian beam at the output of the mirror system. The input beams are from a quasi-optical launcher which converts each of the following mode/frequency pairs into a roughly Gaussian form: TE21,6 (107.5 GHz), TE22,6 (110.0 GHz), TE24,7 (124.5 GHz) and TE25,7 (127.5 GHz). Each of the output beams from the launcher is to be converted into a Gaussian beam with specified waist radius and with as high a coupling coefficient as possible to an ideal Gaussian beam. A design optimization procedure for the mirror system is developed and applied to the case of the four mode/frequency pairs above. The frequencies are specified because they are of interest to General Atomics. The 127.5 GHz frequency is the ITER start-up frequency. In addition, the design obtained is tested by simulation for two other mode/frequency pairs, TE23,6 (112.9 GHz) and TE23,7 (121.5 GHz).
520 $a The theory, algorithms and methods required in such multi-mode beam-shaping mirror system designs are investigated. These include (1) the iterative phase retrieval technique for phase retrieval from measured magnitude-only data; (2) a theoretical formula developed to evaluate the validity of the image theorem approximation in the cylindrical geometry used during the mirror system design; (3) the Taylor-FFT algorithm developed in this research work for fast computation of the electromagnetic wave propagation and scattering; (4) the newly developed phase gradient phase correction method for mirror surface correction; and (5) the least mean square optimization method, proposed for multi-mode mirror design.
520 $a Based on our theory, algorithms and methods, a coupling coefficient to the target Gaussian beam greater than 99.99% is achieved for the single-mode designs and an average coupling coefficient up to 99.50% within the window aperture of 88 mm diameter for the multi-mode design.
590 $a School code: 0262.
650 4 $a Engineering, Electronics and Electrical. $3 626636
650 4 $a Physics, Electricity and Magnetism. $3 1019535
650 4 $a Physics, Fluid and Plasma. $3 1018402
690 $a 0544
690 $a 0607
690 $a 0759
710 2 $a The University of Wisconsin - Madison. $3 626640
773 0 $t Dissertation Abstracts International $g 69-05B.
790 $a 0262
790 1 0 $a Vernon, Ronald J., $e advisor
791 $a Ph.D.
792 $a 2008
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3314260