Design optimization of a hairpin electron source for electron beam welding

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• 作者：Munawar Iqbal ; Fazal-e-Aleem ; Mohammad Rafiq and Sarfarz A. Bhatti
• 关键词：Hairpin filament ; Electron source ; Electron beam welding ; Power density
• 刊名：Vacuum
• 出版年：2006
• 出版时间：6 November 2006
• 年：2006
• 卷：81
• 期：4
• 页码：499-501
• 全文大小：168 K

文摘

We report the optimization of the design and performance of recently reported hairpin tungsten electron source as a cathode in diode type geometry of the gun. The temperature maximum has been shifted close to the crown of the source. Focusing of the beam has been achieved up to 1 mm in diameter with Gaussian profile of the beam at the target. The perveance and power density measured are 10⁻⁵ A V^−3/2 and 10⁶ W cm⁻², respectively.