基于FPGA的GBT仿真器用于μ子室的高速容错保密通信
High speed fault tolerant secure communication for muon chamber using fpga based gbt emulator
摘要：
压缩重子物质（CBM）实验是位于达姆施塔特的GSI反质子和离子研究设施（FAIR）的一部分。CBM实验将利用核-核碰撞研究高度压缩的核物质。该实验将研究固定靶几何中的重离子碰撞，并将能够测量强子、电子和μ子。CBM需要精确的时间同步、紧凑的硬件、辐射耐受性、自触发的前端电子设备、有效的数据聚合方案和处理高数据率（高达几TB/s）的能力。作为在印度实现MUCH读出链的一部分，我们尝试在印度实现基于FPGA的GBTx仿真器。GBTx是一种耐辐射ASIC，可用于实现高能物理（HEP）实验的多用途高速双向光链路，由CERN开发。GBTx将用于高辐射地区，更容易受到多比特错误的影响。为了减轻这种影响，而不是单比特纠错RS码，我们使用了两个比特纠错（15，7）BCH码。这将增加冗余，这反过来又增加了编码数据的可靠性。因此，编码后的数据将不太容易受到辐射噪声的影响。数据将通过通信通道通过多个节点从探测器传输到PC。为了使数据通信安全，在信道编码之后使用高级加密标准（AES -对称密钥加密）和RSA（非对称密钥加密）。
英文摘要：
The Compressed Baryonic Matter (CBM) experiment is a part of the Facility for Antiproton and Ion Research (FAIR) in Darmstadt at the GSI. The CBM experiment will investigate the highly compressed nuclear matter using nucleus-nucleus collisions. This experiment will examine heavy-ion collisions in fixed target geometry and will be able to measure hadrons, electrons and muons. CBM requires precise time synchronization, compact hardware, radiation tolerance, self-triggered front-end electronics, efficient data aggregation schemes and capability to handle high data rate (up to several TB/s). As a part of the implementation of read out chain of MUCH in India, we have tried to implement FPGA based emulator of GBTx in India. GBTx is a radiation tolerant ASIC that can be used to implement multipurpose high speed bidirectional optical links for high-energy physics (HEP) experiments and is developed by CERN. GBTx will be used in highly irradiated area and more prone to be affected by multi bit error. To mitigate this effect instead of single bit error correcting RS code we have used two bit error correcting (15, 7) BCH code. It will increase the redundancy which in turn increases the reliability of the coded data. So the coded data will be less prone to be affected by noise due to radiation. Data will go from detector to PC through multiple nodes through the communication channel. In order to make the data communication secure, advanced encryption standard (AES - a symmetric key cryptography) and RSA (asymmetric key cryptography) are used after the channel coding.
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