ATLAS upgrade

CERN大型强子对撞机(LHC)将拥有几十年来任何粒子物理设施中最高的直接能量覆盖范围，加拿大在LHC的ATLAS合作中的核心作用将使我们保持在国际粒子物理的前沿。虽然LHC和ATLAS现在才刚刚完成初步的加速器和探测器调试，预计2010年才会有第一批物理结果，但现在已经到了考虑LHC加速器和ATLAS探测器子系统的升级计划的时候了。到2014年左右，ATLAS的几个探测器子系统将达到其辐射损害极限，需要更换。为了扩大大型强子对撞机物理计划的覆盖范围，它打算分阶段增加大型强子对撞机的瞬时光度，最终达到数量级的增加。瞬时光度的增加将需要使用能够处理更高的辐射速率和辐射剂量的技术来大幅升级探测器。这项请求是为了资助加拿大物理学家进行必要的研发，以便在未来继续保持我们在ATLAS实验中的领先地位，包括甚高率能量测量量热计、耐辐射和薄像素辐射探测器、先进的高速切伦科夫探测器和辐射监测设备。

The CERN Large Hadron Collider (LHC) will have the highest direct energy reach of any particle physics facility for decades, and Canada's central role in the ATLAS collaboration at the LHC will keep us in the forefront of international particle physics. While the LHC and ATLAS are only now completing initial accelerator and detector commissioning with first physics results expected in 2010, it is already time to consider the upgrade program of both the LHC accelerator and the ATLAS detector sub-systems. By about 2014, several of the ATLAS detector subsystems will be reaching their radiation damage limit and need replacement. In order to extend the reach of the LHC physics program, it is intended to increase the instantaneous luminosity of the LHC in stages eventually reaching an order of magnitude increase. The increase in instantaneous luminosity will require significant detector upgrades using technologies capable of handling the higher rates and radiation doses. This request is for funds for Canadian physicists to perform the R&D necessary to continue our leadership in the ATLAS experiment into the future, including very high rate energy measuring calorimeters, radiation tolerant and thin pixel radiation detectors, advanced high-rate Cerenkov detectors and radiation monitoring devices.