一、概述

為(wei)了對空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)中(zhong)的(de)氚(chuan)進行(xing)(xing)(xing)(xing)測(ce)(ce)量(liang)(liang)(liang)(liang)，常見的(de)形(xing)式(shi)(shi)是(shi)以(yi)水蒸(zheng)氣(qi)(qi)(qi)(qi)(qi)（H1H3O）或氣(qi)(qi)(qi)(qi)(qi)態(tai)氫（H1H3）的(de)形(xing)式(shi)(shi)存(cun)在(zai)。由于(yu)氚(chuan)發射的(de)β粒子的(de)射程很短(duan)，在(zai)空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)中(zhong)只有(you)幾毫米，因(yin)此必須(xu)使(shi)用(yong)(yong)無(wu)窗計(ji)(ji)數(shu)管(guan)(guan)來(lai)進行(xing)(xing)(xing)(xing)測(ce)(ce)量(liang)(liang)(liang)(liang)。這種計(ji)(ji)數(shu)管(guan)(guan)在(zai)結(jie)構上與傳統計(ji)(ji)數(shu)管(guan)(guan)有(you)所不同(tong)，沒有(you)窗口可(ke)(ke)以(yi)讓(rang)β粒子進入，但可(ke)(ke)以(yi)將被測(ce)(ce)量(liang)(liang)(liang)(liang)的(de)空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)添加到(dao)計(ji)(ji)數(shu)氣(qi)(qi)(qi)(qi)(qi)體(ti)中(zhong)。為(wei)了進行(xing)(xing)(xing)(xing)連續(xu)測(ce)(ce)量(liang)(liang)(liang)(liang)，計(ji)(ji)數(shu)管(guan)(guan)必須(xu)在(zai)流(liu)(liu)通(tong)(tong)模(mo)式(shi)(shi)下運行(xing)(xing)(xing)(xing)。這意味著空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)樣(yang)品需(xu)(xu)要不斷通(tong)(tong)過(guo)計(ji)(ji)數(shu)管(guan)(guan)，以(yi)確保(bao)持續(xu)地檢(jian)測(ce)(ce)氚(chuan)的(de)存(cun)在(zai)。通(tong)(tong)常，通(tong)(tong)過(guo)使(shi)用(yong)(yong)泵或其他(ta)氣(qi)(qi)(qi)(qi)(qi)體(ti)流(liu)(liu)動裝置，將空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)樣(yang)品引(yin)入計(ji)(ji)數(shu)管(guan)(guan)中(zhong)。在(zai)流(liu)(liu)通(tong)(tong)模(mo)式(shi)(shi)下，空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)樣(yang)品中(zhong)的(de)氚(chuan)會與計(ji)(ji)數(shu)氣(qi)(qi)(qi)(qi)(qi)體(ti)中(zhong)的(de)探(tan)測(ce)(ce)器(qi)發生反應(ying)，并(bing)(bing)產生可(ke)(ke)測(ce)(ce)量(liang)(liang)(liang)(liang)的(de)信號(hao)。這些信號(hao)可(ke)(ke)以(yi)被計(ji)(ji)數(shu)管(guan)(guan)檢(jian)測(ce)(ce)系統捕(bu)捉并(bing)(bing)記錄下來(lai)，從而(er)實現對連續(xu)測(ce)(ce)量(liang)(liang)(liang)(liang)的(de)需(xu)(xu)求。通(tong)(tong)過(guo)使(shi)用(yong)(yong)無(wu)窗計(ji)(ji)數(shu)管(guan)(guan)和流(liu)(liu)通(tong)(tong)模(mo)式(shi)(shi)，可(ke)(ke)以(yi)有(you)效地對空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)中(zhong)的(de)氚(chuan)進行(xing)(xing)(xing)(xing)測(ce)(ce)量(liang)(liang)(liang)(liang)。這種方法能夠準確地檢(jian)測(ce)(ce)和定量(liang)(liang)(liang)(liang)氚(chuan)的(de)存(cun)在(zai)，并(bing)(bing)在(zai)連續(xu)測(ce)(ce)量(liang)(liang)(liang)(liang)中(zhong)提供可(ke)(ke)靠的(de)結(jie)果(guo)。對于(yu)需(xu)(xu)要長時間監測(ce)(ce)氚(chuan)濃度的(de)應(ying)用(yong)(yong)場景，使(shi)用(yong)(yong)無(wu)窗計(ji)(ji)數(shu)管(guan)(guan)和流(liu)(liu)通(tong)(tong)模(mo)式(shi)(shi)的(de)方法是(shi)非(fei)常可(ke)(ke)行(xing)(xing)(xing)(xing)和有(you)效的(de)選擇。同(tong)時，對于(yu)特(te)定的(de)測(ce)(ce)量(liang)(liang)(liang)(liang)要求，可(ke)(ke)以(yi)根(gen)據實際情況對流(liu)(liu)量(liang)(liang)(liang)(liang)進行(xing)(xing)(xing)(xing)精確控(kong)制，以(yi)滿足(zu)不同(tong)應(ying)用(yong)(yong)的(de)需(xu)(xu)求。

二、技術數據