ATLAS二级触发器感兴趣区域策略的一种新实现
A New Implementation of the Region of Interest Strategy for the ATLAS Second Level Trigger
摘要：
在未来的ATLAS探测器在LHC提出的许多挑战是高的数据采集速率和量，并在有限的资源的快速触发决策的推导。为了解决ATLAS第二级触发系统中的这一挑战，已采用感兴趣区域机制，该机制显著减少了由基于硬件的第一级触发引导的小区域所需读出和处理的相关基准体积。已经开发了软件，以允许任意几何区域和事件数据的小集合的标识符之间的快速转换。这有助于按需检索数据和收集数据。该系统经过优化，以最大限度地减少传输的数据量和不必要的复杂对象的构建。的设计和实施的细节，以及初步的性能结果。
英文摘要：
Among the many challenges presented by the future ATLAS detector at the LHC are the high data taking rate and volume and the derivation of a rapid trigger decision with limited resources. To address this challenge within the ATLAS second level trigger system, a Region-of-Interest mechanism has been adopted which dramatically reduces the relevant fiducial volume necessary to be readout and processed to small regions guided by the hardware-based first level trigger. Software has been developed to allow fast translation between arbitrary geometric regions and identifiers of small collections of the event data. This facilitates on-demand data retrieval and collection building. The system is optimized to minimize the amount of data transferred and unnecessary building of complex objects. Details of the design and implementation are presented along with preliminary performance results.
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