The construction technique of the new MEG II tracker
The construction technique of the new MEG II tracker
复制标题
新型MEG II跟踪器的建造技术
DOI：
10.1016/j.nima.2018.10.112
复制
发表时间：
2019
期刊：
影响因子：
--
通讯作者：
C. Voena
中科院分区：
文献类型：
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作者：
G. Chiarello;A. Baldini;G. Cavoto;F. Cei;M. Chiappini;A. Corvaglia;M. Francesconi;L. Galli;F. Grancagnolo;M. Grassi;M. Hildebrandt;A. Miccoli;D. Nicoló;A. Papa;M. Panareo;C. Pinto;F. Raffaelli;F. Renga;G. Signorelli;G. Tassielli;C. Voena
核磁共振实验的目的是寻找破坏衰变μ+→e+γ的带电轻子味道。MEG已经建立了世界上最好的支化比上限：BR(μ+→e+γ)<；在90%CL时，4.2×10−13。已批准对整个探测器进行升级(MEG II)，以大幅提高灵敏度。新型正电子跟踪器是一个单体积、全立体式圆柱漂移室，充入85：15He/i−C4H10的混合气体。由于其高导线密度(12线/cm2)和对空间分辨率的严格要求，使用经典的馈通式技术作为导线锚定系统很难实现，因此有必要开发一种具有高性能控制的自动化系统(布线机器人)。在INFN Lecce和萨伦托大学实验室设计和制造的布线机器人用于MEG CDCH的布线阶段。新的CDCH目前在INFN Lecce和Pisa处于测试阶段，稍后将交付PSI进行调试。
The MEG experiment, at the PSI, aims to search for the charged lepton flavor violating decay μ+→ e+ γ. MEG has established the world best upper limit for the branching ratio: BR (μ+→ e+ γ)< 4. 2× 1 0− 13 at 90% CL. An upgrade (MEG II) of the whole detector has been approved to obtain a substantial increase in sensitivity. The new positron tracker is a single volume, full stereo cylindrical Drift Chamber (CDCH), filled with a gas mixture of 85: 15 H e∕ i− C 4 H 10. Due to their high wires density (12 wires/cm 2) and the stringent requirements on spatial resolution, the use of the classical feed-through technique as wire anchoring system can hardly be implemented and therefore it is necessary to develop an automatic system (wiring robot) with a high-performing control. A wiring robot, designed and built at the INFN Lecce and University of Salento laboratories was used for the wiring phase of the MEG CDCH. The new CDCH is currently in the test phase at INFN Lecce and Pisa, and later it will be delivered to PSI for commissioning.
使用MEG II实验液氙伽马射线探测器时间校准计数器评估时间分辨率
DOI：
--
发表时间：
2022
期刊：
影响因子：
--
作者：
Akabayashi;Hideo;Shimpei Taguchi;Mirka Zvedelikova;松下彩華
通讯作者：
松下彩華