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The Dark Matter Particle Explorer (DAMPE) is being constructed as a scientific satellite to observe high en- ergy cosmic rays in space. As a crucial detector of DAMPE, the BGO calorimeter consists of 1848 PMT dynode signals which bring difficulties in front-end electronics on the space-limited and power-limited satellite platform. To overcome the challenge, a low-noise, low-power and high-integration ASIC chip, named VA32HDR14.2, is taken into account. In order to evaluate the radiation tolerance of the chip in space radiation environment, both single event effect (SEE) and total ionizing dose (TID) tests were performed. The SEE test result shows that the effective linear energy transfer (LET) threshold of single event latch-up (SEL) of the chip is around 23.0 MeV- cm2/mg, which is relatively sensitive, thus protection methods must be taken in the electronics design, The TID test result shows that the TID performance of the chip is higher than 25 Krad(Si), which satisfies the design specification. 相似文献
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高压缩重子物质(Compressed Baryonic Matter,CBM)实验装置飞行时间谱仪利用由多气隙电阻板室(Multi-gap Resistive Plate Chamber,MRPC)探测器构建的超级模块实现高密度、高精度的粒子飞行时间测量,该超级模块可支持高达320通道的高精度时间测量能力,数据率高达6 Gbit·s~(-1)。为实现超级模块探测器的性能评估,提出一种基于千兆以太网的分布式数据读出方法,利用片上系统技术实现读出节点的千兆网络传输能力。测试结果表明,针对单条数据传输路径,原型读出模块在全链路情况下,能实现约467 Mbit·s-1的综合数据传输速率。读出方案中事例组装、命令发送、状态显示等功能均运行正常。 相似文献
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作为高校通识教育的重要组成部分,中国书法艺术教育可以为理工科学生全面协调发展作出自己特有的贡献。书法艺术教育可发挥独特的德育功能,有效增强理工科学生对中国传统文化的认同度,提升对中华民族创造潜力的自信心。其次,可以发挥独特的智育功能,提升学生的抽象思维水平,改善动手实践能力。再次,可以发挥独特的美育功能,增强学生审美意识,丰富学生审美情趣,提升学生审美修养。充分发挥中国书法艺术的德育功能、智育和美育功能,可以通过一系列书法教育实践活动来实现。 相似文献
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对全网的CM射频数据进行统计学分析,通过对指标的均值偏移与波动情况研究,得出一种简单、有效、实时的评测双向HFC射频性能的模型,对HFC的运行维护、监督管理具有很好的借鉴意义. 相似文献