在倒装芯片的单粒子效应防护设计验证中, 重离子在到达器件敏感区前要经过几百微米的衬底材料, 需要计算器件敏感区中离子的线性能量传输(LET)值。采用兰州重离子加速器加速的 55 MeV/μ58Ni离子对基于倒装的 Xilinx公司550万门现场可编程门阵列(FPGA)实现的典型系统的单粒子效应防护设计进行了试验验证, 采用 SRIM、FLUKA和 GEANT等不同方法对试验中的 LET值进行了分析, 同时将 SRIM分析的典型结果与基于磁偏转飞行时间法的试验数据进行了比较, 发现与现有的重离子分析结果有一定差异。因此在防护验证中采用离子 LET作为主要参数的情况下, 应对重离子(尤其是高能段 )的 LET的计算方法进行约定, 以规范试验过程, 增强数据的可比性。
静态随机存储器型现场可编程门阵列 倒装芯片 单粒子效应 重离子 线性能量传输 Stopping Range Ions Matter-based Field Programmabl flip -chip single eventeffect heavy ions Linear Energy Transfer 太赫兹科学与电子信息学报
2016, 14(6): 985
Author Affiliations
Abstract
State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China
We present a new structure of nearly-zero flattened dispersion and highly nonlinear photonic crystal fiber (PCF) in the telecommunication window. This fiber design is comprised of a hybrid-core region with -bismuth-doped region in the center and three lower bismuth-doped regions in the first ring that enables dispersion control while maintaining a high nonlinear coefficient. Numerical analysis results show that the proposed PCF is achieved with a nonlinear coefficient of about 3301 W-1 km-1, a dispersion value of about 0.5537 ps/(nm·km) at 1550 nm, and nearly-zero flattened dispersion fluctuating within 2.5 ps/(nm·km) ranging from 1.496 to 1.596 μm.
060.5295 Photonic crystal fibers 060.4370 Nonlinear optics, fibers 060.2400 Fiber properties Chinese Optics Letters
2015, 13(1): 010602
