摘要：A very high frame rate camera is designed based on an innovative CCD driving method. The CCD driving method is mainly implemented on frame transfer CCDs. Asynchronous drive timing sequences are applied in the image and storage section of the CCDs. Several rows of the charge in the image section are binned onto the same row in the storage section, and there are the same number of images to be stored in the storage section before they are read out. Based on the new driving method, the frame transfer CCDs can work at a very high frame rate in acquiring burst images though the reading speed remains at a lower level. A very high frame rate camera is designed in this paper. The innovative CCD driving method is mainly of concern. An e2v’s CCD60 is adopted in the camera system, whose full size resolution is 128×128, and the up most frame rate is 1000 Hz in the conventional CCD driving method. By using the presented method, the CCD60 based imager is capable of operating at up to 40000 frames per second （fps） at a recognizable resolution of 128×32. Comparing cameras using traditional binning and region of interest technologies, the frame rate is normally less than 5000 fps while the resolution is only 32×32 left.

摘要：Purging plug with slits is widely used in the secondary refining process,and its service life determines the downtime and production *** achieve a good performance in service life,optimizing the geometric structure of the slit,which can alleviate the stress concentration around the slit,was employed using the finite plate ***,the performance of the purging plugs with different shapes of slits in the refining effect was investigated by conducting the water model *** numerical simulation results showed that the appropriate shapes of slits could alleviate the stress concentration *** the water model experiment,the mixing time of the purging plug with circular slits is lesser than that of the purging plug with rectangular slits when the gas flow is less than 6.02 L/*** with the rectangular slits,the circular slits are detrimental to smaller and well-distributed ***,the inclusion removal rate of the purging plug with circular slits is approximately 10%larger than that of the purging plug with the rectangular slits.

摘要：在空间电荷主导电子束研究中 ,纵向聚焦非常重要 ,在输运过程中由于强空间电荷力的影响 ,束团将很快变长并崩溃 ,马里兰大学的电子环设计用于方形束团和抛物线形束团的研究 ,环中需要用三个感应腔对束团进行纵向聚焦 .文中首先介绍了方形束团和抛物线形束团的纵向束流动力学 ,推导了两种束团纵向聚焦所需要的 5MHz重复率高压脉冲波形 ,并给出了实现纵向聚焦的感应腔设计及其特殊要求 .

摘要：在台湾中微子实验项目先期研究中 ,用硅光电二极管测读中微子作用于 Cs I(Tl)晶体的光谱信号。

摘要：本文采用束流光学匹配软件优化组合磁铁布局得到一种紧凑型的同步加速器。该加速器具有周长短、磁铁孔径小、束流品质高等优点。注入和引出设计是此同步加速器的关键点,基于Matlab/AT开发了模拟软件,模拟研究注入和引出相关束流动力学问题。研究结果表明,该同步加速器束流品质优、注入效率高、引出束流损失低。该同步加速器可满足航天、材料和生物等多方面研究。

摘要：Daniel Paul Schreber(1842-1911)was once the Presiding Judge in the Saxon Court of Appeal and a doctor of law in Germany,until he was afflicted with a severe mental illness in *** was given the diagnosis of paranoid *** delusional systems involved intimate contact with God and the overwhelming desire to become a woman and to be impregnated by *** repressed his homosexuality throughout his *** published an autobiographical account of his mental illness in 1903 in a book entitled Denkwürdigkeiten eines Nervenkranken(Memoirs of a Nervous Illness),which soon became a classic of psychiatric literature commented on by Sigmund Freud,Carl Jung and other psychoanalysts.

摘要：为了利用正电子发射断层成像技术在植物生理功能研究中的优势 ,正在开发由两个探测器相向放置构成的γ射线成像系统 .系统中采用的探测器是由 1 0× 1 0的氧正硅酸镥 (LSO)晶体阵列与滨松R590 0 C1 2耦合组成 .单个LSO尺寸为 1 .8mm× 1 .8mm×1 0mm .根据PET应用的特点 ,测试了该探测器的性能 .所有闪烁晶体的图像在位置图谱中清楚可见 ;51 1keV全能峰处的能量分辨率位于 1 4.5%— 2 2 %之间 ;符合时间分辨率随着位置灵敏光电倍增管的供给电压的增加而得到改善 .这些实验结果表明 ,该LSO探测器适于构造高分辨率的双探测器成像系统 .

摘要：This paper begins with a brief introduction of the embedded real-time operating system VxWorks and CompactPCI standard, then gives the programming interfaces of Peripheral Controller Interface （PCI） configuring, interrupts handling and multi-tasks programming interface under VxWorks, and then emphasis is placed on the software frameworks of CPCI interrupt management based on multi-tasks. This method is sound in design and easy to adapt, ensures that all possible interrupts are handled in time, which makes it suitable for data acquisition systems with multi-channels, a high data rate, and hard real-time high energy physics.

摘要：加速管是一台加速器的核心部分．一般电子辐照加速器的俘获效率在50％左右,一半的电子都损失在加速管内．丢失的电子打在加速管内壁,产生轫致辐射、腔体发热量增加、真空变坏等许多负面影响．采用一段等梯度加速结构,相速沿加速管呈线形增加,调整相速变化规律及加速管腔体的尺寸参数,设计出的加速管最终的俘获效率提高到90％以上,同时平均加速梯度没有因此降低,加速管总长度没有增加．

摘要：The leaders of China＇ s high energy physics sector will soon unveil initial designs for the world＇s most technologically advanced circular collider, set to stage near-speed-of-light particle collisions aimed at recreating the conditions of the universe in the instant following the Big Bang.