摘要
为满足CERN/ALICE超高能重离子对撞实验光子谱仪的需要,首次采用高阻硅材料,并利用一些特殊工艺,研制了用于钨酸铅晶体探测器读出单元的硅光电二极管PIN。PIN的灵敏区面积为16mm×17mm,常温漏电流小于5nA,紫光区量子效率82%,全耗尽结电容为110—120pF。由PIN与电荷灵敏前置放大器组成的读出系统的噪声水平,在-25℃下小于600个等效噪声电荷,并经过了长期性能稳定性的考验。开发研制的大面积PIN硅光管全面达到ALICE/PHOS国际招标所规定PIN硅光管性能的指标。
The silicon PIN photodiode is an important part of the PbWO4 detector read-out system that will be used in the Photon Spectrometer （PHOS） in the CERN/ALICE experiment. High specific resistivity n-type silicon material is used for the first time in our R＆D of PIN, and special techniques are employed in the production process to ensure low dark current, high quantum efficiency, and low noise. The PIN diode has a sensitive area of 16 mm×17 mm. The leak current is lower than 5 nA at room temperature, the quantum efficiency in the wavelength range of 400---500 nm is about 82%, and the junction capacity is about 110--120 pF The noise level （ENC） of PIN＋PreAmp system is lower than 600 e at -25 ℃. The PIN diodes have passed the long-term stability test. The performance of our R＆D PIN photo-diodes has overall met the ALICE/PHOS requirement.
出处
《核技术》
CAS
CSCD
北大核心
2006年第4期305-308,共4页
Nuclear Techniques
基金
国家自然科学基金资助项目(00121140488)
