Time Projection Chamber Development for the International Linear Collider

国际直线对撞机（ILC）是下一个在能量前沿研究亚原子物理的世界设施。加拿大参加国际法委员会将使我国在促进粒子物理学知识的世界范围内处于领先地位。ILC是一个电子-正电子对撞机，最初的碰撞能量为500 GeV，以后有可能升级到1000 GeV。强有力的科学理由是，ILC将补充大型强子对撞机（LHC），因为它将为最近发现的希格斯玻色子和物理学家可能在未来几年在那里做出的新发现提供更多的线索。像ILC这样的加速器将使我们能够在后lhc时代解开宇宙的秘密。日本目前正在考虑作为ILC实验室的东道国。目前正处于规划阶段的ILC社区于2013年6月12日发布了一份五卷本的技术设计报告（TDR），其中包含了多年来为ILC加速器和探测器的建设而进行的全球协调研发工作。加拿大一直积极参与TDR的编制工作。TDR包含了向全球各国合作政府提出ILC所需的所有要素，包括技术设计和实施计划，这些都是现实的，并在性能、成本和风险方面进行了优化。考虑到ILC将在日本举办，最早可能会在2016年提出积极建议，并在此后不久呼吁进行ILC实验。加拿大一直处于国际图联仪器开发的前沿。加拿大物理学家在新型微模式气体探测器（mpgd）的开发方面一直处于领先地位，其目标是为加拿大的新型仪器的设计和建造保持并带来新的专业知识。事实上，卡尔顿大学、维多利亚大学和TRIUMF国家实验室的研究人员已经参与设计和建造了一个4.7米长的时间投影室（TPC），配备了MPGDs，它将作为ILC探测器之一的主要跟踪器。随着新型电荷弥散MPGD读数技术的发展，带有电阻层的Micromegas模块成为了TDR中ILC TPC的一种选择。在最近的拨款周期中，已经证明配备电阻层读出器的MPGD TPC可以达到前所未有的空间分辨率，从而可以满足TRD的性能目标。拟议的两年拨款将使我们能够及时推动和完成我们对ILC TPC的现有承诺，以便ILC批准。该资助申请包括对学生和一名博士后研究助理的支持，以及光束测试、会议和研讨会的旅行。在项目的这个阶段，维持和加强TPC的努力对于确保加拿大积极参与ILC是至关重要的。

The International Linear Collider (ILC) is the next proposed world facility to study subatomic physics at the energy frontier. Participation of Canada in the ILC will keep our Nation in a leading position on the world-wide scene for the advancement of knowledge in particle physics. The ILC is an electron-positron collider with collision energy of 500 GeV initially, with the possibility for a later upgrade to 1000 GeV. The strong scientific justification is that the ILC would complement the Large Hadron Collider (LHC) as it would shed more light on the recent discovery of the Higgs boson and new findings that physicists are likely to make there in the coming years. An accelerator like the ILC will enable us to unlock secrets of our Universe in the post-LHC era. Japan is presently considering hosting the ILC laboratory. Currently in the planning stage, the ILC community has published on 12 June 2013 a five-volume Technical Design Report (TDR) that encompasses many years of globally coordinated R&D effort for the construction of both the accelerator and detectors for the ILC. Canada has been an active participant in the preparation of the TDR. The TDR contains all the elements needed to propose the ILC to collaborating governments around the planet, including a technical design and implementation plan, that are realistic and have been optimized for performance, cost and risk. In the context of the ILC to be hosted in Japan, positive recommendation could be as early as 2016 with a call for ILC experiments shortly thereafter. Canada has been at the forefront for the development of instrumentation for the ILC. Canadian physicists have been a leader in the development of novel Micro Pattern Gas Detectors (MPGDs), with the objective to keep and bring new expertise within Canada for the design and construction of novel instrumentation. In fact, researchers from Carleton University, the University of Victoria and the TRIUMF national laboratory have been engaged in the design and construction of a 4.7-meter long Time Projection Chamber (TPC), equipped with MPGDs, that will serve as the main tracker for one of the ILC detectors. The development of new charge dispersion MPGD readouts by the proponents has led the Micromegas modules instrumented with a resistive layer to become one option for the ILC TPC in the TDR. During recent grant cycles it has been demonstrated that the MPGD TPC equipped with the resistive layer readout could reach unprecedented spatial resolution and could then meet the performance goals of the TRD. The proposed two-year grant will enable us to boost and finalize our existing commitments for the ILC TPC in time for the ILC approval. The grant request includes support for students and one postdoctoral research associate, as well as travel for beam tests, meetings and workshops. At this stage of the project, maintenance and reinforcement of the TPC effort are vital to insure an active participation of Canada in the ILC.