本文選題：反符合　切入點(diǎn)：探測(cè)器　出處：《云南大學(xué)》2015年碩士論文

【摘要】：硬X射線調(diào)制望遠(yuǎn)鏡(HXMT)是以直接解調(diào)成像方法為基礎(chǔ)進(jìn)行研制的寬波段巡天望遠(yuǎn)鏡。HXMT衛(wèi)星在軌工作時(shí)會(huì)有大量帶電粒子穿過(guò)主探測(cè)器,并在其上面沉積能量,產(chǎn)生很多本底事例,嚴(yán)重降低主探測(cè)器的探測(cè)靈敏度。CCD探測(cè)器作為低能探測(cè)部分的主探測(cè)器,必然也會(huì)受到穿過(guò)HXMT帶電粒子的干擾,為了去除帶電粒子的干擾需要使用反符合探測(cè)器剔除這部分本底。本文研制了一種CCD反符合探測(cè)器,用以排除入射到低能主探測(cè)器上帶電粒子產(chǎn)生的信號(hào),從而提高CCD探測(cè)器的靈敏度。本文主要工作和結(jié)果如下： 首先完成了反符合探測(cè)器的結(jié)構(gòu)設(shè)計(jì)。采用塑料閃爍體為探測(cè)器介質(zhì),硅光電倍增管為光讀出器件,將硅光電倍增管通過(guò)光導(dǎo)與塑料閃爍體耦合,并在塑料閃爍體表面覆蓋反射層和避光層。確定了塑料閃爍體的選材和尺寸設(shè)計(jì),同時(shí)確定了硅光電倍增管的選型。 其次,研制了CCD反符合探測(cè)器的硬件電子學(xué)系統(tǒng)。包括電源模塊,前放模塊,以及線性放大器模塊。由于CCD反符合探測(cè)器主要器件硅光電倍增管(MPPC)的增益對(duì)溫度敏感,不同溫度下增益隨溫度變化明顯,嚴(yán)重影響了反符合探測(cè)器的性能,所以對(duì)MPPC的性能進(jìn)行測(cè)試。為了實(shí)現(xiàn)其增益的穩(wěn)定,研制了溫度補(bǔ)償電路解決了這一問(wèn)題。 最后對(duì)整個(gè)反符合探測(cè)器單元進(jìn)行了測(cè)試研究。選擇入射到地面的u子作為入射粒子,通過(guò)兩重符合和三重符合,完成了反符合探測(cè)器的部分性能參數(shù)的測(cè)試。結(jié)果表明,所研制的探測(cè)器對(duì)穿透性荷電粒子的探測(cè)效率均高于90%,滿足了設(shè)計(jì)要求。
[Abstract]:Hard X-Ray Modulation Telescope (HXMT) is a wide-band survey telescope. HXMT, which is developed on the basis of direct demodulation imaging method, will have a large number of charged particles passing through the main detector and depositing energy on it when it is in orbit. There are many background cases, which seriously reduce the detection sensitivity of the main detector. As the main detector of the low-energy detection part, the main detector must also be interfered by the charged particles passing through the HXMT. In order to remove the interference of charged particles, the anti-coincidence detector is used to eliminate this part of the background. In this paper, a CCD anti-coincidence detector is developed to exclude the signal generated by charged particles incident to the low-energy main detector. In order to improve the sensitivity of CCD detectors, the main work and results of this paper are as follows:. Firstly, the structure design of the anti-coincidence detector is completed. The plastic scintillator is used as the detector medium, the silicon photomultiplier tube is the light readout device, and the silicon photomultiplier tube is coupled with the plastic scintillator through the photoconductivity. The material selection and size design of plastic scintillator and the selection of silicon photomultiplier tube were determined. Secondly, the hardware electronic system of CCD anti-coincidence detector is developed, including power supply module, preamplifier module and linear amplifier module. Because the gain of CCD anti-coincidence detector is sensitive to temperature, the main device of CCD anti-coincidence detector is silicon photomultiplier tube. The gain varies obviously with the temperature at different temperatures, which seriously affects the performance of the anti-coincidence detector, so the performance of the MPPC is tested. In order to realize the stability of the gain, the temperature compensation circuit is developed to solve this problem. Finally, the whole anti-coincidence detector unit is tested and studied. The incident U element is selected as the incident particle, and some performance parameters of the anti-coincidence detector are tested by double coincidence and triple coincidence. The results show that, The detection efficiency of the detector for penetrating charged particles is higher than 90, which meets the design requirements.
【學(xué)位授予單位】：云南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TH743

【參考文獻(xiàn)】

相關(guān)期刊論文 前4條

1 李育林 ,李東方;光子學(xué)的發(fā)展概述[J];高速攝影與光子學(xué);1980年01期

2 陳勇,李延國(guó),吳枚;新型高性能脈沖峰值保持電路[J];核電子學(xué)與探測(cè)技術(shù);1997年04期

3 郭洪生,何錫鈞,彭太平;大面積PIN探測(cè)器性能參數(shù)實(shí)驗(yàn)測(cè)量[J];原子核物理評(píng)論;2005年03期

4 岳珂;徐瑚珊;梁晉潔;孫志宇;王建松;蘇光輝;胡正國(guó);陳若富;肖志剛;鄭川;張雪熒;涂小林;陳金達(dá);章學(xué)恒;陳俊嶺;;基于GEANT4的CsI(Tl)閃爍體探測(cè)器的Monte Carlo模擬[J];原子核物理評(píng)論;2010年04期

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