English  |  正體中文  |  简体中文  |  Items with full text/Total items : 54367/62174 (87%)
Visitors : 15198153      Online Users : 73
RC Version 6.0 © Powered By DSPACE, MIT. Enhanced by NTHU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version
    National Tsing Hua University Institutional Repository > 理學院 > 物理系 > 期刊論文 >  Absolute instabilities in a high-order-mode gyrotron traveling-wave amplifier

    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/55304

    Title: Absolute instabilities in a high-order-mode gyrotron traveling-wave amplifier
    Authors: Tsai WC;Chang TH;Chen NC;Chu KR;Song HH;Luhmann NC
    教師: 張存續
    Date: 2004
    Publisher: American Physical Society
    Relation: PHYSICAL REVIEW E, American Physical Society, Volume 70, Issue 5, NOV 2004
    Abstract: The absolute instability is a subject of considerable physics interest as well as a major source of self-oscillations in the gyrotron traveling-wave amplifier (gyro-TWT). We present a theoretical study of the absolute instabilities in a TE01, mode, fundamental cyclotron harmonic gyro-TWT with distributed wall losses. In this high-order-mode circuit, absolute instabilities arise in a variety of ways, including overdrive of the operating mode, fundamental cyclotron harmonic interactions with lower-order modes, and second cyclotron harmonic interaction with a higher-order mode. The distributed losses, on the other hand, provide an effective means for their stabilization. The combined configuration thus allows a rich display of absolute instability behavior together with the demonstration of its control. We begin with a study of the field profiles of absolute instabilities, which exhibit a range of characteristics depending in large measure upon the sign and magnitude of the synchronous value of the propagation constant. These profiles in turn explain the sensitivity of oscillation thresholds to the beam and circuit parameters. A general recipe for oscillation stabilization has resulted from these studies and its significance to the current TE01,-mode, 94-GHz gyro-TWT experiment at UC Davis is discussed.
    URI: http://www.aps.org/
    Appears in Collections:[物理系] 期刊論文

    Files in This Item:

    File Description SizeFormat
    2010132010016.pdf109KbAdobe PDF285View/Open


    SFX Query


    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback