Performance of MSGC on electronically and ionically conductive substrata in various operational conditions
Performance of MSGC on electronically and ionically conductive substrata in various operational conditions
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DOI：
10.1016/0168-9002(94)90759-5
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发表时间：
1994-09
影响因子：
1.4
通讯作者：
L. Alunni;R. Bouclier;G. Fara;C. Garabatos;G. Manzin;G. Million;L. Ropelewski;F. Sauli;L. Shekh
中科院分区：
文献类型：
--
作者：
L. Alunni;R. Bouclier;G. Fara;C. Garabatos;G. Manzin;G. Million;L. Ropelewski;F. Sauli;L. Shekh
介绍了在玻璃基板上制造的微带气体室（MSGC）在体电阻率范围内的最新测量结果。在氩气-二甲醚（DME）混合物中操作时，在电阻率为109ω cm的导电支架和金条上制成的腔室在长期照射期间表现出稳定的行为，累计电荷高达130 mC/cm。用氩气-甲烷进行的类似测量表明，在收集到的电荷约为5毫微克/厘米时，增益已经迅速下降。对不同Ar-DME组分的MSGC性能的进一步研究表明，50-50的混合可以获得更大的稳定增益。我们还介绍了在负极距离为200 μm、气体层为2mm的Hoya SL玻璃上制造的MSGC进行光束运行的结果。用氩气-二甲醚和氙气-二甲醚混合气体测量了效率和空间分辨率与轨迹入射角的关系；对于垂直于腔室（0°）的最小电离粒子，Xe气体混合物的空间分辨率为65 μm rms，效率为98%。当入射角达到10°时，观察到两个参数的小退化。
Recent measurements realized with Microstrip Gas Chambers (MSGC) manufactured on glass substrata in a range of bulk resistivity are presented. Chambers made on electronically conductive supports with resistivity of 109ω cm and gold strips show a stable behaviour during long term irradiation up to an accumulated charge of 130 mC/cm of strip when operated in an argon-dimethylether (DME) mixture. Similar measurements realised with argon-methane show instead a fast degradation of gain already at collected charge of around 5 mC/cm. Further investigation of MSGC performance with different Ar-DME compositions show that the larger stable gain can be achieved with a 50-50 mixture.We present also results of beam runs performed with MSGC manufactured on Hoya SL glass with an anode to cathode distance of 200 μm and a 2 mm gas layer. The dependence of efficiency and spatial resolution on the incidence angle of track was measured with argon-DME and xenon-DME gas mixtures; for minimum ionizing particles perpendicular to the chambers (0°) the spatial resolution for Xe gas mixture is 65 μm rms and the efficiency 98%. For incidence angles up to 10° a small degradation of both parameters was observed.