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真空泵廠家淺談真空泵的高頻放電現象
- 分類:新聞資訊
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- 發(fa)布時間(jian):2022-12-16
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【概要描(miao)述】真空(kong)泵廠家告訴(su)大家高(gao)(gao)頻放電是由于兩電極之間存在高(gao)(gao)頻交變電場(chang)而(er)引起的(de)放電形(xing)式,當放電管兩端施(shi)加交變電壓時,氣體中的(de)電子和正離(li)子在交變電場(chang)的(de)作用(yong)下產生附加共(gong)振
真空泵廠家淺談真空泵的高頻放電現象
【概(gai)要描述】真空泵廠家告訴大家高頻(pin)放電(dian)是由于兩電(dian)極之間存在(zai)(zai)高頻(pin)交變(bian)電(dian)場而引起的放電(dian)形(xing)式,當(dang)放電(dian)管(guan)兩端施加交變(bian)電(dian)壓時,氣體中(zhong)的電(dian)子和正離子在(zai)(zai)交變(bian)電(dian)場的作用下(xia)產生(sheng)附加共(gong)振
- 分類:新聞資訊
- 作者:
- 來源:
- 發(fa)布時間:2022-12-16
- 訪(fang)問量:
真(zhen)空泵廠家淺談(tan)真(zhen)空泵的(de)高頻放電(dian)現象
真空(kong)泵(beng)廠(chang)家:真空(kong)泵(beng)的高頻放(fang)電現象
真空泵廠(chang)家(jia)告訴大(da)家(jia)高頻放(fang)電(dian)(dian)是(shi)由于(yu)兩(liang)(liang)電(dian)(dian)極之(zhi)間存在(zai)高頻交(jiao)(jiao)變電(dian)(dian)場而(er)引(yin)起(qi)的放(fang)電(dian)(dian)形式,當放(fang)電(dian)(dian)管兩(liang)(liang)端施加交(jiao)(jiao)變電(dian)(dian)壓時(shi),氣體中的電(dian)(dian)子(zi)和(he)正(zheng)離(li)(li)子(zi)在(zai)交(jiao)(jiao)變電(dian)(dian)場的作用下產生(sheng)附加共(gong)振(zhen),因(yin)為正(zheng)離(li)(li)子(zi)的質(zhi)量(liang)遠大(da)于(yu)電(dian)(dian)子(zi)的質(zhi)量(liang),所以共(gong)振(zhen)幅度很小,當真空泵的頻率(lv)較低,共(gong)振(zhen)的振(zhen)幅遠大(da)于(yu)兩(liang)(liang)極之(zhi)間的距離(li)(li)時(shi),電(dian)(dian)子(zi)在(zai)每(mei)半(ban)個周期內經歷(li)坍縮、放(fang)電(dian)(dian)和(he)消光的全(quan)過程,此(ci)時(shi),放(fang)電(dian)(dian)情況與DC相(xiang)同,當頻率(lv)較高時(shi),共(gong)振(zhen)的振(zhen)幅遠小于(yu)兩(liang)(liang)極之(zhi)間的距離(li)(li),電(dian)(dian)子(zi)的電(dian)(dian)離(li)(li)能力會因(yin)其不斷的來回(hui)運動而(er)大(da)大(da)增強(qiang)。
因為(wei)電(dian)(dian)(dian)(dian)(dian)(dian)子(zi)共振的(de)(de)幅(fu)度很小,所以進入(ru)電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)子(zi)數量會大大減(jian)少(shao),這樣氣體自持(chi)放電(dian)(dian)(dian)(dian)(dian)(dian)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)子(zi)將不再由(you)電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)產生(sheng)(sheng)的(de)(de)二次(ci)電(dian)(dian)(dian)(dian)(dian)(dian)子(zi)提供,而是由(you)電(dian)(dian)(dian)(dian)(dian)(dian)子(zi)來回運動時(shi)電(dian)(dian)(dian)(dian)(dian)(dian)離(li)產生(sheng)(sheng)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)子(zi)提供,此時(shi),雖然有少(shao)量正(zheng)離(li)子(zi)和光子(zi)轟(hong)擊電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)產生(sheng)(sheng)二次(ci)電(dian)(dian)(dian)(dian)(dian)(dian)子(zi),但二次(ci)電(dian)(dian)(dian)(dian)(dian)(dian)子(zi)的(de)(de)振動方向有時(shi)與流入(ru)電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)子(zi)流方向相同(tong),有時(shi)則相反,因為(wei)兩個電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)的(de)(de)極(ji)性是不斷變化的(de)(de),因此不利于保證自持(chi)條件。
真(zhen)空(kong)泵(beng)廠家(jia)告(gao)訴大(da)家(jia)這種真(zhen)空(kong)泵(beng)的(de)高頻放(fang)電(dian)(dian)只要有(you)高頻電(dian)(dian)場(chang)(chang)就(jiu)能形成(cheng)(cheng),所(suo)以一般稱(cheng)為(wei)無極(ji)放(fang)電(dian)(dian),無極(ji)放(fang)電(dian)(dian)不僅可(ke)以在交(jiao)變電(dian)(dian)場(chang)(chang)中(zhong)形成(cheng)(cheng),也可(ke)以在交(jiao)變磁(ci)(ci)場(chang)(chang)中(zhong)形成(cheng)(cheng),由于交(jiao)變磁(ci)(ci)場(chang)(chang)可(ke)以產(chan)生(sheng)渦旋電(dian)(dian)場(chang)(chang),氣體中(zhong)殘余電(dian)(dian)離(li)產(chan)生(sheng)的(de)電(dian)(dian)子(zi)在渦旋電(dian)(dian)場(chang)(chang)的(de)作用下圍繞磁(ci)(ci)力線(xian)加速,產(chan)生(sheng)大(da)量(liang)電(dian)(dian)離(li),當磁(ci)(ci)場(chang)(chang)方向(xiang)為(wei)放(fang)電(dian)(dian)管軸向(xiang)時,渦流電(dian)(dian)場(chang)(chang)會(hui)沿徑向(xiang)逐漸減弱(ruo),電(dian)(dian)子(zi)的(de)電(dian)(dian)離(li)能力也會(hui)沿徑向(xiang)減弱(ruo),從而形成(cheng)(cheng)電(dian)(dian)子(zi)和離(li)子(zi)沿徑向(xiang)的(de)濃度(du)梯度(du)。
在(zai)濃度(du)梯度(du)的(de)(de)(de)作(zuo)用下,電(dian)子(zi)(zi)和(he)離子(zi)(zi)從軸(zhou)向管壁擴散(san),由于電(dian)子(zi)(zi)擴散(san)速度(du)比(bi)離子(zi)(zi)快,因(yin)(yin)此,在(zai)軸(zhou)上有(you)一(yi)個(ge)(ge)正電(dian)勢(shi),在(zai)管壁上有(you)一(yi)個(ge)(ge)負(fu)電(dian)勢(shi),這(zhe)又產生了(le)一(yi)個(ge)(ge)從軸(zhou)到管壁的(de)(de)(de)靜電(dian)場(chang)(chang),所以放電(dian)管內有(you)兩種(zhong)電(dian)場(chang)(chang),一(yi)種(zhong)是磁力線周圍(wei)的(de)(de)(de)渦流電(dian)場(chang)(chang),另一(yi)種(zhong)是從軸(zhou)線到管壁的(de)(de)(de)靜電(dian)場(chang)(chang),在(zai)這(zhe)兩個(ge)(ge)電(dian)場(chang)(chang)的(de)(de)(de)同(tong)(tong)時作(zuo)用下,電(dian)子(zi)(zi)繞軸(zhou)運動,向管壁膨脹,產生一(yi)系列同(tong)(tong)心(xin)環,因(yin)(yin)為不(bu)同(tong)(tong)半徑的(de)(de)(de)電(dian)子(zi)(zi)能量(liang)相差大,激發(fa)的(de)(de)(de)能級和(he)數量(liang)也不(bu)同(tong)(tong),所以不(bu)同(tong)(tong)半徑的(de)(de)(de)環顏色(se)也不(bu)同(tong)(tong)。
真空泵廠家(jia)告訴大家(jia)高(gao)頻(pin)放電(dian)(dian)時的(de)點(dian)火電(dian)(dian)壓(ya)(ya)是放電(dian)(dian)發生時施加到電(dian)(dian)極上的(de)交(jiao)變(bian)電(dian)(dian)勢差的(de)幅度(du),該電(dian)(dian)壓(ya)(ya)的(de)幅度(du)低于(yu)DC放電(dian)(dian)的(de)點(dian)火電(dian)(dian)壓(ya)(ya),高(gao)頻(pin)擊(ji)穿(chuan)電(dian)(dian)場的(de)強(qiang)(qiang)度(du)與氣(qi)壓(ya)(ya)有關,氣(qi)壓(ya)(ya)越高(gao),擊(ji)穿(chuan)電(dian)(dian)場強(qiang)(qiang)度(du)越大,擊(ji)穿(chuan)頻(pin)率越高(gao),高(gao)頻(pin)放電(dian)(dian)廣(guang)泛應用于(yu)雷達和脈沖(chong)技術中。
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