Study of Elementary Particle Physics with ATLAS experiment of LHC Project

1999年是大型强子对撞机项目ATLAS探测器建设的第二年。日本集团负责的部分的施工进度也很明显。与此同时，数据采集和物理分析的研究与开发也处于后期阶段。下面我们列出了日本负责的部分的进展情况；(1) μ子触发室：我们已经建造了大约10个薄间隙触发室的原型。我们还测试了这些腔室的基本性能。各种配套工具已准备好批量生产。我们已经掌握了室内批量生产的大部分步骤。同时，完成了放大-整形-鉴别（ASD） LSI电路的研发。成功完成40万通道ASD芯片。此外，ASD板已完成约30,000块。一级电子系统的另一部分，在设计、调试、样机生产和各种试验等方面都取得了很大进展。(2) μ子系统专用时数转换芯片：设计和样机生产已按计划进行。然而，输入接收电路显示出较高的功耗，这需要进一步的设计研究。(3)硅半导体跟踪探测器：硅传感器已开始量产。开发和测试了各种硅探测器模块的原型。一个专门用于安装硅探测器模块的机器人被成功地制造出来，然后被送到牛津大学进行进一步的使用。(4)超导螺线管：成功搭建了线圈，并搭建了相关的低温设备及其控制系统。(5)数据采集：与欧洲核子研究中心合作，我们已经测试了一个使用千兆以太网技术的原型even-builder。虽然它的基本性质得到了验证，但很明显，诸如可伸缩性之类的技术问题必须进一步研究。(6)物理：我们已经开始了LHC的物理研究。少

The year of 1999 is the second year of the construction of the ATLAS detector for LHC Project. Progress of construction is also noticeable for the parts that the Japanese group is responsible for construction. Meanwhile, research and developments of the data acquisition as well as physics analysis are in advanced stage. Below we list the progress for the parts that Japan is responsible ;(1) Muon trigger chambers : We have constructed about 10 prototypes of the thin-gap trigger chambers. We also tested the basic properties of these chambers. Various supporting tools were made ready for mass production. We have mastered most of steps for chamber mass-production. Concurrently, R&D of the amplifier-shaper-discrimination (ASD) LSI circuits has been completed. Then 400,000 channels of the ASD chips were successfully completed. In addition, about 30,000 pieces of the ASD boards have been finished. For the other part of the level-1 electronics system, there were wide progresses in design, prot … More otype production as well as various tests.(2) Special time-to-digital conversion chips for the muon system : The design ans prototype production has been progressed as planned. However, the input receiver circuits have shown higher power consumption which requires further design investigation.(3) Silicon semiconductor tracking detectors : We have started the mass production of the silicon sensors. Various prototypes of the silicon detector modules were developed and tested. A special robot for mounting the silicon detector modules was successfully constructed and then it was sent to the Oxford university for further use of the robot.(4) Superconducting Solenoid : the coil was successfully constructed and associated cryogenics equipments as well as its control system were constructed.(5) Data acquisition : With collaboration of CERN, we have tested a prototype even-builder using the Giga-bit Ethernet technology. Although its fundamental properties were verufied, it becomes clear that technical problems such as scalability must be further studied.(6) Physics : we have started studies of physics for LHC. Less