Study of Elementary Particle Physics with ATLAS experiment of LHC Project

1999年是LHC计划ATLAS探测器建造的第二年。日本集团负责建设的部分的建设进展也很明显。与此同时，数据采集和物理分析的研究和开发也处于高级阶段。下面我们列出日本负责的部分的进展：（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特性。各种辅助工具已准备好进行大规模生产。我们已经掌握了腔室批量生产的大部分步骤。与此同时，研究和开发的放大器-整形器-歧视（ASD）的大规模集成电路已经完成。随后，40万通道的ASD芯片顺利完成。此外，约30，000块ASD板已完成。对于一级电子系统的另一部分，在设计、保护和维护方面都有了很大的进步， ...更多信息 生产以及各种测试。(2)μ子系统的特殊时间-数字转换芯片：设计和原型生产已按计划进行。然而，输入接收器电路已经显示出较高的功耗，这需要进一步的设计研究。(3)硅半导体跟踪探测器：我们已经开始批量生产硅传感器。硅探测器模块的各种原型被开发和测试。一个用于安装硅探测器模块的特殊机器人被成功地建造出来，然后被送到牛津大学进行进一步的使用。(4)超导螺线管：成功制造了超导螺线管，并建造了相关的低温设备及其控制系统。(5)数据采集：与CERN合作，我们已经测试了使用千兆位以太网技术的原型even builder。虽然它的基本属性已经验证，但很明显，必须进一步研究可扩展性等技术问题。(6)物理：我们已经开始为LHC进行物理研究。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