权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Development of Nuclear Fusion Device using Electromagnetically confined Ions accelerating electrostatically

利用电磁约束离子静电加速的核聚变装置的开发

基本信息

批准号：
13558057
负责人：
TAKAMURA Shuichi
金额：
$ 7.23万
依托单位：
Nagoya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2003
项目状态：
已结题

项目摘要

A small LaB6 disk supported with a tantalum holder is inserted into tokarnak discharge plasmas with the discharge current of Ip=0.3~1.5 kA. It is supposed as an electron emitting cathode in which the electrode current of 100 A is easily obtained by arcing. The cross-field plasma resistance of tokamak magnetic configuration, Rr, has a scaling of Rr ∞ Bt^<1.0>Ig^<-(1.0~1.2)> for Ip = 0.5~1.5 kA where Bt is the toroidal magnetic field intensity and Ig is the electrode biasing current. The deepest potential well remains as deep as -0.3 kV.In the case of Ip less than 0.5 kA, the parameter dependency of potential well depth is quite changed compared with the previous case. When Bt 【greater than or equal】0.11 T, Rr becomes as large as 5 Ω and increases as Ip decreases, like Rr ∞ Ip^<(0.4~0.5)> For the following parameters : Ig【similar or equal】100A, Bt=0.13T and Ip=0.3kA, we obtain the deep potential well with -0.7 kV..One of the candidating physical mechanisms behind such a bifurcation like phenomena would be a generation of shock wave for Er×Bt poloidal plasma rotation to overcome the poloidal Alfven velocity. In the experiments a large potential oscillation has been observed, providing an interesting physical subject to be solved.Above these scalings and observations, we will obtain a deep potential well with a few kV in deuterium tokamak discharge by using the current pulsed voltage source (Maximum voltage : -5 kV ; Maximum current : 200 A ; Maximum pulse length : 250 micro-sec), which will make a basis for a new neutron source.

将一个带有钽支架的LaB6小圆盘插入放电等离子体中，放电电流为Ip=0.3~1.5 kA。假设它是一种电子发射阴极，通过电弧很容易获得100 A的电极电流。当Ip = 0.5~1.5 kA时，托卡马克磁组态的跨场等离子体电阻Rr具有Rr∞Bt^<1.0>Ig^<-(1.0~1.2)>的标度，其中Bt为环向磁场强度，Ig为电极偏置电流。最深的电势井深度保持在-0.3 kV。当Ip小于0.5 kA时，电位井深的参数依赖性与前一种情况相比发生了很大变化。当Bt【大于或等于】0.11 T, Rr变成一样大5Ω,提高Ip减少,像Rr∞Ip ^ <(0.4 ~ 0.5) >以下参数:搞笑【相似或相等】100年,英国电信(Bt) = 0.13 T和Ip = 0.3 ka,我们获得深势阱-0.7 kV . .的一个候选品牌背后的物理机制这样的分岔现象将是一代对Er×Bt极向旋转等离子体冲击波克服极向阿尔芬速度。在实验中观察到一个很大的电位振荡，提供了一个有趣的物理问题来解决。在此基础上，利用电流脉冲电压源（最大电压为-5 kV，最大电流为200 a，最大脉冲长度为250微秒），在氘托卡马克放电条件下获得了几kV的深电位阱，为新型中子源的研制奠定了基础。