發(fā)布時間：2018-05-24 11:26

  本文選題：擊穿 + 能量沉積��； 參考：《中國空間科學技術》2017年02期

【摘要】：當前,抑制強電磁場真空擊穿的方法主要是結構改進和工藝處理,對于提高材料耐電子轟擊性能來抑制擊穿的研究相對較少。文章主要結合Monte-Carlo方法和Bethe能量損失規(guī)律,研究了兆電子伏級能量的電子垂直入射金屬靶材的能量損失規(guī)律。研究表明,材料原子序數(shù)和原子密度越小,電子在材料中的有效射程越長,單位體積內沉積的平均能量越低,從而越有利于材料耐受電子束轟擊。在此基礎上,通過試驗比較了銅、不銹鋼和鈦三種材料耐電子束轟擊的性能,在相同的電子束能量下,銅由于密度最高而最容易受到電子束轟擊破壞,密度最低的鈦材料具有最好的耐電子束轟擊性能。進一步的高功率微波(High Power Microwave)試驗證實,相對于不銹鋼材料,在2.8GW輸出微波功率水平下,使用耐電子轟擊性能更優(yōu)的鈦材料能夠將輸出微波脈寬由18ns增加到27ns,由強電磁場真空擊穿引起的脈沖縮短明顯得到有效抑制。
[Abstract]:At present, the main methods to restrain the vacuum breakdown of the strong electromagnetic field are structure improvement and process treatment, but there are few studies on how to improve the resistance to electron bombardment of the materials to suppress the breakdown. Based on the Monte-Carlo method and the Bethe energy loss law, the energy loss law of the metal target with the electron vertical incidence of the metroelectronic volt energy is studied in this paper. The results show that the smaller the atomic number and density, the longer the effective range of electrons in the material, and the lower the average energy deposited in the unit volume, which is more favorable to resist electron beam bombardment. On this basis, the properties of copper, stainless steel and titanium against electron beam bombardment are compared by experiments. Under the same electron beam energy, copper is most vulnerable to electron beam bombardment because of its highest density. Titanium with the lowest density has the best resistance to electron beam bombardment. Further high power microwave Power microwavetest confirmed that compared with stainless steel material, at the microwave power level of 2.8GW output, The pulse width of the output microwave can be increased from 18ns to 27ns by using titanium materials with better resistance to electron bombardment, and the pulse shortening caused by the vacuum breakdown of the strong electromagnetic field can be effectively suppressed.
【作者單位】： 湘潭大學材料科學與工程學院;西北核技術研究所;高功率微波技術重點實驗室;
【基金】：國家自然科學基金(61401367) 西北核技術研究所預研項目(13061601)
【分類號】：TN125

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本文編號：1928879