測(cè)量熱陰極次級(jí)電子發(fā)射的新方法及其應(yīng)用
A NEW METHOD FOR MEASURING THE SECONDARY ELECTRON EMISSION OF THERMIONIC CATHODE AND ITS APPLICATION
-
摘要: 本文利用相關(guān)檢測(cè)技術(shù),并對(duì)測(cè)試管結(jié)構(gòu)作了改進(jìn),很好地抑制了熱電子本底及空間電荷效應(yīng),構(gòu)成一種測(cè)量熱陰極在工作溫度下次級(jí)電子發(fā)射性能的新方法。以浸漬鈧酸鹽陰極為樣品,測(cè)得在低的轟擊電子能量和電子流情況下次級(jí)電子發(fā)射系數(shù)占隨溫度指數(shù)上升;轟擊電子能量或轟擊電子流較大時(shí),溫度對(duì)沒(méi)有很大的影響。研究表明高溫下鈧酸鹽陰極存在電子轟擊熱發(fā)射增大效應(yīng),對(duì)此本文提出內(nèi)建場(chǎng)模型加以解釋。Abstract: By using correlation-detection technique and improving the structure of test tube, the background noise of thermionic-electrons and space charge effect are restrained. The secondary emission coefficient of thermionic cathode at high temperature have been studied. The of impregnated scandate cathodes increases exponentially with increasing temperature at low energy and current of bombardment electron; at high energy or current of bombardment electron, the temperature has little effect to . The research shows that an enhanced thermionic emission occured when the cathode works in high temperature and at electron bombardment. These phenomena are discussed in terms of internal field model.
-
張恩虬, 科學(xué)通報(bào),7(1975),324.[2]劉學(xué)愨, 陰極電子學(xué),科學(xué)出版社,1980.[3]M. A. Pomerantz, Phys. Rev., 70(1946) 1, 33.[4]J. B. Johnson, Phys. Rev., 73(1948) 9, 1058.[5]J. B. Johnson, Phys. Rev., 83(1951) 1, 49.[6]J. Woods, Brit. J.Appl. Phys., 3(1952)10, 323.[7]孫學(xué)民,熱陰極次級(jí)發(fā)射的測(cè)量方法及性能研究,南京工學(xué)院碩士論文,1988.[8]婁維鴻,微弱信號(hào)檢測(cè)技術(shù),南京工學(xué)院,1985.[9]胡漢泉等,真空物理與技術(shù)及其在電子器件中的應(yīng)用,國(guó)防工業(yè)出版社,1985.[10]白騰純嗣著,黃振綱譯,半導(dǎo)體物理基礎(chǔ),高等教育出版社,1982. -
計(jì)量
- 文章訪(fǎng)問(wèn)數(shù): 2528
- HTML全文瀏覽量: 131
- PDF下載量: 459
- 被引次數(shù): 0
下載:
