未来切伦科夫望远镜阵列的触发和读出方案
A Trigger and Readout Scheme for future Cherenkov Telescope Arrays
摘要：
下一代地面伽马射线观测站，例如CTA，将由大约50-100个望远镜和相机组成，总共约100000到200000个通道。核心阵列的望远镜将覆盖约1平方公里的有效区域，并可能伴随着分布在约10平方公里范围内的大型小型望远镜光环。为了最大限度地利用立体方法，需要一种非常灵活的望远镜间触发方案，允许将相距约1公里的望远镜耦合在一起。开发一种具有成本效益的摄像机信号读出方案是一项重大的技术挑战。在这里，我们提出了一个新的异步望远镜间触发方案的想法，和一个非常具有成本效益的，高带宽的前端到后端的数据传输系统，都基于标准的以太网组件和以太网前端接口的基础上大规模生产的标准FPGA。
英文摘要：
The next generation of ground-based gamma-ray observatories, such as e.g. CTA, will consist of about 50-100 telescopes, and cameras with in total ~100000 to ~200000 channels. The telescopes of the core array will cover and effective area of ~ 1 km2 and will be possibly accompanied by a large halo of smaller telescopes spread over about 10 km2 . In order to make maximum use of the stereoscopic approach, a very flexible inter-telescope trigger scheme is needed which allows to couple telescopes that located up to ~1 km apart. The development of a cost effective readout scheme for the camera signals exhibits a major technological challenge. Here we present ideas on a new asynchronous inter-telescope trigger scheme, and a very cost-effective, high-bandwidth frontend to backend data transfer system, both based on standard Ethernet components and an Ethernet front-end interface based on mass production standard FPGAs.
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