袖珍台式标定激波管

<正> 一、前言本文所介绍的标定激波管,专用于压力传感器作动态性能标定。由标定激波管试验可以得到压力传感器的上升时间、过冲比、自振频率、阻尼比和动态灵敏度等参数。测压管道和二次仪表的动态参数,也可由标定激波管试验获得。国内现有的一些标定激波管多数是7～8米长的大设备。最近我们研制了一台袖珍台式标定激波管,总长仅2米,具有占地小、投资少、用气省、操作方便和实验周期短等优点。

紧凑拉伸试样应力强度因子的统一公式

本文通过简单的力学分析,导得了紧凑拉伸试样应力强度因子的统一的表达式(公式(5),(7),(8)),可以适用于相当宽的H/W和a/W的范围,与边界配置法结果相比,误差小于1％(大多数数据的误差小于O.5％)。 本文采用的基本函数K_b和K_s,均为Srawley~[1、2]等用边界配置法得到的结果拟合而求得的。在拟合过程中发现文献[1、2]内有五个数据异乎寻常,证实了文献[3]中重新计算的结果。 利用本文的表达式还可以方便地计算试样的柔度,结果也是令人满意的。

Heating, current drive and confinement regimes with the JET ICRH and lhcd systems

During its 1990 operation, 2 large RF systems were available on JET. The Ion Cyclotron Resonance Heating (ICRH) system was equipped with new beryllium screens and with feedback matching systems. Specific impurities generated by ICRH were reduced to negligible levels even in the most stringent H-mode conditions. A maximum power of 22 MW was coupled to L-mode plasmas. High quality H-modes (tau-E greater-than-or-equal-to 2.5 tau-EG) were achieved using dipole phasing. A new high confinement mode was discovered. It combines the properties of the H-mode regime to the low central diffusivities obtained by pellet injection. A value of n(d) tau-E T(i) = 7.8 x 10(20) m-3 s keV was obtained in this mode with T(e) approximately T(i) approximately 11 keV. In the L-mode regime, a regime, a record (140 kW) D-He-3 fusion power was generated with 10 - 14 MW of ICRH at the He-3 cyclotron frequency. Experiments were performed with the prototype launcher of the Lower Hybrid Current Drive (LHCD) systems with coupled power up to 1.6 MW with current drive efficiencies up to < n(e) > R I(CD)/P = 0.4 x 10(20) m-2 A/W. Fast electrons are driven by LHCD to tail temperatures of 100 keV with a hollow radial profile. Paradoxically, LHCD induces central heating particularly in combination with ICRH. Finally we present the first observations of the synergistic acceleration of fast electrons by Transit Time Magnetic Pumping (TTMP) (from ICRH) and Electron Landau Damping (ELD) (from LHCD). The synergism generates TTMP current drive even without phasing the ICRH antennae.

[Discurso do Deputado Emival Caiado : Sessão da Câmara dos Deputados de 02 de maio de 1960]

Discurso proferido durante a 1ª Sessão da Câmara dos Deputados na nova capital do país. Apresenta solicitação de preferência para a votação do requerimento que destina a presente sessão para as comemorações da inauguração da cidade de Brasília.