本文選題：蘭州重離子放射性束流線　切入點：雙層多絲正比室　出處：《西南大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著國內(nèi)外放射性束物理的深入發(fā)展,其研究對象轉(zhuǎn)移向低Z值附近的豐質(zhì)子和豐中子核,例如He6、8He、9Li、11Be、12Be、14Be、9C、10C等。在蘭州重離子放射性束流線(Radioactive Ion Beam Line in Lanzhou)上這些核的產(chǎn)額低,這就使得對探測器的探測效率提出更高要求。研制一種高性能的氣體探測器——基于LC延遲電路的雙層多絲正比室(Double-layer Multi-Wire Proportional Chamber based on LC delay circuit),提高對中高能重離子的探測效率,測量靶前入射粒子徑跡和靶后粒子的飛行方向。同時為提高束流的傳輸效率,分離和鑒別束流成分起重要作用。本文主要描述了為蘭州重離子放射性束流線(RIBLL II)上測量中高能放射性離子的位置而研制的一種基于LC延遲電路的雙層多絲正比室(MWPC)。該探測器的探測靈敏面積是80100?mmmm,其位置信號通過陰極絲引出并經(jīng)過LC延遲電路讀出。探測器是由兩套完整的多絲正比室組成,每套的陽極絲等間距的夾在兩層平行的陰極絲之間,陰極絲與陽極絲相互垂直。兩套陰極絲對應(yīng)相互垂直并且輸出入射粒子的二維位置信息。將每套位置對應(yīng)的陰極絲合并成一路接入LC延遲電路來增大感應(yīng)信號以提高探測器的探測效率。用5.9keVFe-55的X射線源均勻地照射探測器的靈敏區(qū)域,測試結(jié)果顯示其具有良好的位置靈敏一致性。用5.9keVFe-55的X射線源通過準(zhǔn)直狹縫掃描整個探測器的靈敏區(qū)域,得到X,Y層的位置線性度均好于0.999,探測器的位置分辨(?)分別是199.9?m和154.0?m。研制出的探測器已在RIBLL II進(jìn)行的實驗中投入使用,其工作性能穩(wěn)定。
[Abstract]:With the further development of radiation beam physics at home and abroad, the research object is transferred to proton rich and neutron rich nuclei near low Z value, for example, He6D8 Hean8He9Li 11Ben 11Ben 12Ben 14BeN 9C 10C, etc. The yields of these nuclei are low on the Radioactive Ion Beam Line in Lanzhou. of the heavy ion radioactive beam streamline in Lanzhou, In order to improve the detection efficiency of the detector, a high performance gas detector, a double-layer Multi-Wire Proportional Chamber based on LC delay circuit, is developed, which is based on LC delay circuit to improve the detection efficiency of medium-high energy heavy ions. The track of incident particle in front of target and the flying direction of particle behind target are measured. In order to improve the transmission efficiency of beam, The separation and identification of beam composition play an important role. This paper describes a double layer multiwire proportional circuit based on LC delay circuit for the location of high energy radioactive ions measured on Lanzhou heavy ion beam streamlines (RIBLL II). The sensitive area of the detector is 80100? Mm, the position signal is elicited by the cathode wire and read out by the LC delay circuit. The detector is composed of two complete multiwire proportional chambers, each set of anode wires with equal spacing between two parallel cathode wires. Cathode wire and anode wire are perpendicular to each other. Two sets of cathode wires are perpendicular to each other and output two-dimensional position information of incident particles. The cathode wire corresponding to each set of positions is combined into a single line of LC delay circuit to increase the induction signal. Improving the detection efficiency of the detector. The sensitive region of the detector is uniformly illuminated with an X-ray source of 5.9 Kev Fe-55, The results show that the X-ray source of 5.9keV Fe-55 can scan the sensitive region of the detector by collimation slit, and the linearity of the XY layer is better than that of 0.999.The position resolution of the detector is better than that of the X-ray source of 5.9keVFe-55. ) they are 199.9. M and 154.0? The developed detector has been used in the experiment of RIBLL II, and its performance is stable.
【學(xué)位授予單位】：西南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：O571

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本文編號：1631412