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  1. B100 理学部/理学研究科
  2. B100d 学位論文
  3. 博士論文(理博・論理博)

Measurement of Radiation Power from the JIPP T-IIU Tokamak Plasma : JIPP T-IIUトカマクプラズマからの放射強度測定

http://hdl.handle.net/2237/12553
http://hdl.handle.net/2237/12553
e4fd679f-dbb2-44e1-b651-0a02a14043db
名前 / ファイル ライセンス アクション
ko1923_abstr.pdf ko1923_abstr.pdf (135.3 kB)
ko1923.pdf ko1923.pdf (10.5 MB)
Item type 学位論文 / Thesis or Dissertation(1)
公開日 2009-12-24
タイトル
タイトル Measurement of Radiation Power from the JIPP T-IIU Tokamak Plasma : JIPP T-IIUトカマクプラズマからの放射強度測定
言語 en
著者 小川, 勇

× 小川, 勇

WEKO 32243

ja 小川, 勇

Search repository
Ogawa, Isamu

× Ogawa, Isamu

WEKO 32244

en Ogawa, Isamu

Search repository
アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
抄録
内容記述 Characteristics of a pyroelectric detector, a metal-film bolometer and a thermistor are investigated in order to attain high reliability or the bolometric measurement. The spurious signal which appears on a pyroelectric detector is efficiently eliminated by setting a mask close to the detector, which has a function of avoiding the direct incidence of photons on its electrode. This is verified with the consistency of integrated value of the signal. The detector is calibrated with a HeNe laser taking the reflection on the detector surface into account. No temporal change has been seen on the sensitivity or the detector calibrated by this method. We also developed a thin metal-film bolometer with high sensitivity (12.9Ω/mJ) , high time response (3 μs) and well defined thermal characteristics. The calibration of this detector was performed by supplying a bias current through its resistor. We constructed a bolometric system which consisted of twelve pyroelectric detectors and a metal-film bolometer with high time response and high spatial resolution. The radiation power measured with the pyroelectric detector agrees with that measured with the calibrated metal-film bolometer within 10 %. Spectroscopic and bolometric measurements with spatial and temporal resolution show that large radiation loss brings about the decrease in electron and ion temperature and plasma energy. Carbon limiters have an effect to suppress the radiation power for ohmic plasma, but are insufficient for ICRF heated plasma. The main contribution to radiation power may be attributed to Fe impurity released from the ICRF antennae, the Faraday shield and vacuum vessel. By making carbonization or the wall and in-vessel components, the Fe impurity is suppressed to a low level (nFe /ne ~ 0.04 %) and the radiation power is reduced to Prad /(PoH +P_rf ) ~ 20 % and emissivity throughout the plasma region is reduced. This is clearly supported by the observation of Z_eff reduction (3.9→1.2).
言語 en
内容記述タイプ Abstract
内容記述
内容記述 名古屋大学博士学位論文 学位の種類 : 理学博士(課程) 学位授与年月日 : 昭和62年3月25日
言語 ja
内容記述タイプ Other
言語
言語 eng
資源タイプ
資源 http://purl.org/coar/resource_type/c_db06
タイプ doctoral thesis
書誌情報
発行日 1987-03-25
学位名
言語 ja
学位名 理学博士
学位授与機関
学位授与機関識別子Scheme kakenhi
学位授与機関識別子 13901
言語 ja
学位授与機関名 名古屋大学
言語 en
学位授与機関名 Nagoya University
学位授与年度
学位授与年度 1986
学位授与年月日
学位授与年月日 1987-03-25
学位授与番号
学位授与番号 乙第1923号
フォーマット
application/pdf
フォーマット
application/pdf
著者版フラグ
値 publisher
URI
識別子 http://hdl.handle.net/2237/12553
識別子タイプ HDL
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