搜索结果: 1-15 共查到“理学 Gem”相关记录24条 . 查询时间(0.058 秒)
由于电子动理学效应的影响，等离子体杂质输运和湍流会跟随电子离子温度之比发生变化，进而影响约束性能。实验上通过射频波加热提高电子温度，此时等离子体具有很强的轫致辐射，同时重杂质线辐射进入软X射线波段。利用二维GEM相机观察软X波段的辐射，其反演过程不依赖平衡位形，在分析宏观扰动和杂质输运方面具有优势。芯部电子温度～3keV时，高电离态铁对GEM计数率贡献显著增强。高约束ELM-free至ELMy转化...
C-GEM (v 1.0): a new, cost-efficient biogeochemical model for estuaries and its application to a funnel-shaped system
cost-efficient biogeochemical model estuaries and its application funnel-shaped system
2014/12/19
Reactive transport models (RTMs) are powerful tools for disentangling the complex process interplay that drives estuarine biogeochemical dynamics, for assessing the quantitative role of estuaries in g...
Anatomy of the Gem OB1 molecular cloud complex
Gem Molecular cloud Molecular gas Form Star formation
2014/12/9
I have conducted an extensive study of the Gem OB1 molecular cloud complex in order to determine the global morphology of the molecular gas and how the morphology is correlated with the distribution o...
重磁电方法及应用国际研讨会（GEM Chengdu 2015）通知。
The experimental data of the COSY-GEM collaboration for the recoil-free transfer reaction p(27Al,3He)π−p′X, leading to the formation of bound state of eta (η) meson in 25Mg nucleus, is reanalyze...
Atmospheric gaseous elemental mercury (GEM) concentrations and mercury depositions at a high-altitude mountain peak in south China
Atmospheric gaseous elemental mercury concentrations mercury depositions high-altitude mountain peak
2010/3/16
China is regarded as the largest contributor of mercury (Hg) to the global atmospheric Hg budget. However, concentration levels and depositions of atmospheric Hg in China are poorly known. Continuous ...
An X-ray imaging device based on a GEM detector with delay-line readout
delay-line readout gas electron multiplier (GEM) X-ray imaging
2009/12/24
An X-ray imaging device based on a triple-GEM (Gas Electron Multiplier) detector, a fast delay-line circuit with 700 MHz cut-off frequency and two dimensional readout strips with 150 μm width on the t...
Investigation of Gas attachment with GEM-TPC detector
GEM detector TPC(Time Projection Chamber) attachment of Gas
2009/8/14
This paper mainly summarizes investigation of TU GAS (Ar:CH4:CF4=90:7:3) with the GEM-TPC detection system that had been developed , especially, the gas's bigger attachment coefficient was obtained a...
Research on the delay-line readout for GEM detectors
GEM delay-line readout particle detector
2009/8/14
Based on the principles of transmission line and the output signal of GEM detector, a full simulation model of delay-line circuit has been described in this paper. The consistency of simulation result...
基于GEM读出的TPC原型设计与建造
时间投影室TPC 气体电子倍增器GEM 端盖读出
2009/8/12
基于GEM探测器读出的TPC漂移室，具有非常多的优势，是ILC中央径迹探测器的首选方案之一。本文介绍了一个GEM－TPC原型机的设计。通过对该原型机进行的一系列测试，证明了该系统设计合理、搭建成功，已具备其基本功能，可以进行深入的测试研究。
针对TPC中对于电子漂移的要求, 结合Garfield软件, 研究了我们所研制的TPC原型所用的工作气体. 分析了不同气体对于电子漂移的寿命、漂移速度、横向和纵向扩散, 以及电离特性等参数的影响; 结合分析论证, 得到了以Ar, CH4和CF4为主要成分的气体作为工作气体时TPC的性能指标. 并且测试了该气体中的读出GEM探测器的能量分辨率、气体增益等性能参数, 获得了很好的结果.
三级GEM的性能及多路成像的实验研究
气体电子倍增器 能量分辨率 有效增益 多路成像
2009/7/27
报道研制的三级气体电子倍增器(Triple-GEM)的性能及多路成像的研究结果. 实验测得三级GEM对55Fe 5.9keV X射线全能光电峰的最佳能量分辨率为20.2%; 有效增益≥104. 利用96路8mm×8mm的pad及电子数字系统成功实现多路成像.
Hydrogen cyanide in the upper troposphere: GEM-AQ simulation and comparison with ACE-FTS observations
Hydrogen cyanide GEM-AQ simulation ACE-FTS
2009/7/15
We investigate the spatial and temporal distribution of hydrogen cyanide (HCN) in the upper troposphere through numerical simulations and comparison with observations from a space-based instrument. To...
GEM气体探测器的增益特性
气体电子倍增器 高计数率 气体探测器
2009/6/17
研制一种双层结构的GEM气体探测器用于X射线成像和带电粒子径迹测量.使用铜靶X射线管产生的高能量X射线对其气体放大倍数,电荷传输效率,增益稳定性进行测试.实验结果显示:在入射X射线通量为105Hz/mm2时,双层GEM探测器的有效增益达到104以上,并且具有长时间稳定性.
Searching evidences for spiral shocks in the quiescent Accretion disk of u gem
spiral shocks quiescent Accretion disk u gem
2009/6/17
Searching evidences for spiral shocks in the quiescent Accretion disk of u gem。