本文選題：強(qiáng)流多注電子束 + 鏡像束流��； 參考：《物理學(xué)報(bào)》2017年04期

【摘要】：建立了多注電子束在空心圓柱波導(dǎo)中傳輸?shù)睦碚撃Ｐ?定量分析了多注電子束自電磁場(chǎng)力與鏡像電磁場(chǎng)力對(duì)其角向運(yùn)動(dòng)的影響,并推導(dǎo)了考慮鏡像束流影響下多注電子束的布里淵磁場(chǎng).開(kāi)展了模擬仿真研究,模擬與理論計(jì)算結(jié)果基本一致.研究發(fā)現(xiàn):當(dāng)電子束注數(shù)較少且靠近波導(dǎo)管壁傳輸時(shí),鏡像電磁場(chǎng)力是影響多注電子束角向漂移的主要因素;隨著電子束注數(shù)或電子束與波導(dǎo)壁間距的增加,鏡像電磁場(chǎng)力迅速減小并趨近于零,此時(shí)自電磁場(chǎng)力起主導(dǎo)作用;在一般情況下,漂移角速度的變化百分比只與加速電壓有關(guān),與多注電子束的注數(shù)、空間位置關(guān)系等參數(shù)無(wú)關(guān).在輸出電壓約670 kV,電流約7 kA,空心圓柱波導(dǎo)長(zhǎng)約100 mm的平臺(tái)上開(kāi)展了實(shí)驗(yàn)研究,研究發(fā)現(xiàn)多注電子束存在明顯的畸變,通過(guò)進(jìn)一步的分析認(rèn)為多注陰極柱的側(cè)面發(fā)射是導(dǎo)致電子束畸變的一個(gè)主要因素,并且二極管加速區(qū)的角向漂移不可忽視.提出并模擬驗(yàn)證了采取傾斜多注陰極柱的方法可提高電子束的引入效率.
[Abstract]:A theoretical model for the propagation of multi-beam electron beams in hollow cylindrical waveguides is established. The effects of the self-electromagnetic force of multi-beam electron beam and the mirror electromagnetic field force on the angular motion of the multi-beam electron beam are quantitatively analyzed. The Brillouin magnetic field considering the effect of mirror beam is derived. The simulation results are in good agreement with the theoretical results. It is found that the mirror electromagnetic field force is the main factor affecting the angular drift of multi-beam electron beams when the number of electron beams is small and propagates close to the waveguide wall, with the increase of the number of electron beams or the distance between electron beams and waveguide walls. The mirror electromagnetic field force decreases rapidly and approaches to zero, in which the self-electromagnetic force plays a leading role. In general, the percentage of drift angular velocity variation is only related to the acceleration voltage, and to the number of multi-beam electron beams. The spatial position relation has nothing to do with other parameters. Experimental studies have been carried out on a platform with an output voltage of about 670 kV, a current of about 7 Ka and a hollow cylindrical waveguide about 100 mm in length. It is found that there is obvious distortion in the multi-beam electron beam. Through further analysis, it is considered that the side emission of the multi-beam cathode column is one of the main factors leading to the electron beam distortion, and the angular drift of the diode acceleration region can not be ignored. It is proved by simulation that the introduction efficiency of electron beam can be improved by using inclined multi-beam cathode column.
【作者單位】： 中國(guó)工程物理研究院應(yīng)用電子學(xué)研究所高功率微波技術(shù)重點(diǎn)實(shí)驗(yàn)室;中國(guó)工程物理研究院研究生院;
【基金】：國(guó)家自然科學(xué)基金(批準(zhǔn)號(hào):11475158) 中國(guó)物理研究院科學(xué)發(fā)展基金(批準(zhǔn)號(hào):2014B0402068)資助的課題~~
【分類號(hào)】：TN814

【相似文獻(xiàn)】

相關(guān)會(huì)議論文 前1條

1 張國(guó)平;王洪瑾;周克驥;;內(nèi)外室壓力不等的空心圓柱扭剪儀的研制[A];中國(guó)土木工程學(xué)會(huì)第七屆土力學(xué)及基礎(chǔ)工程學(xué)術(shù)會(huì)議論文集[C];1994年

相關(guān)博士學(xué)位論文 前1條

1 王惠明;空心圓柱和空心球在徑向應(yīng)變情形的彈性動(dòng)力學(xué)解[D];浙江大學(xué);2003年

相關(guān)碩士學(xué)位論文 前1條

1 張金良;浙江大學(xué)5Hz空心圓柱儀調(diào)試研究[D];浙江大學(xué);2007年

，

本文編號(hào)：2014092