SLHC硅跟踪器的冷却管供电优化设计
Powering via Cooling Pipes: an Optimized Design for an SLHC Silicon Tracker
摘要：
SLHC的硅跟踪器将遭受碰撞期间产生的粒子的高辐射损伤，这导致高泄漏电流。减少传感器中的这些电流需要有效冷却至-30 ℃。CO2的大蒸发热和低粘度允许具有细而长的冷却管的两相冷却系统，因为所需的小液体流量导致可忽略的温度下降。为了减少材料预算，提出了一种系统，其中大规模跟踪器需要ca。50千瓦的功率通过直径为1-2毫米的铝冷却管提供动力，冷却管长度为几米。这些长冷却管允许所有服务连接在跟踪体积之外，从而显著减少材料预算。整个系统设计成具有可忽略的热应力。一个CO2吹气系统已被设计和第一次测试显示的可行性，桶检测器与长梯子和小半径的磁盘，导致优化设计的材料预算和简单的建设。
英文摘要：
Silicon trackers at the SLHC will suffer high radiation damage from particles produced during the collisions, which leads to high leakage currents. Reducing these currents in the sensors requires efficient cooling to -30 C. The large heat of evaporation of CO2 and the low viscosity allows for a two-phase cooling system with thin and long cooling pipes, because the small flow of liquid needed leads to negligible temperature drops. In order to reduce the material budget a system is proposed in which a large scale tracker requiring ca. 50 kW of power is powered via 1-2 mm diameter aluminum cooling pipes with a length of several m. These long cooling pipes allow to have all service connections outside the tracking volume, thus reducing the material budget significantly. The whole system is designed to have negligible thermal stresses. A CO2 blow system has been designed and first tests show the feasibility of a barrel detector with long ladders and disks at small radii leading to an optimized design with respect to material budget and simplicity in construction.
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