Overview of neutron and confined/escaping alpha diagnostics planned for ITER
Overview of neutron and confined/escaping alpha diagnostics planned for ITER
复制标题
DOI：
10.1088/0741-3335/46/7/s08
复制
发表时间：
2004-07
影响因子：
2.2
通讯作者：
M. Sasao;A. Krasilnikov;T. Nishitani;P. Batistoni;V. S. Zaveryaev;Y. Kaschuck;S. Popovichev;T. Iguchi;O. N. Jarvis;J. Källne;C. Fiore;L. Roquemore;W. Heidbrink;A. Donné;A. Costley;C. Walker
中科院分区：
文献类型：
--
作者：
M. Sasao;A. Krasilnikov;T. Nishitani;P. Batistoni;V. S. Zaveryaev;Y. Kaschuck;S. Popovichev;T. Iguchi;O. N. Jarvis;J. Källne;C. Fiore;L. Roquemore;W. Heidbrink;A. Donné;A. Costley;C. Walker
从阿尔法粒子相关物理研究的角度对 ITER 计划的聚变产品测量进行了审查。聚变等离子体物理学的最新进展已将中子发射率的理想测量要求扩展到兆赫兹区域，为研究内部输运势垒 (ITB) 提供更好的中子分布分辨率等。采用阈值计数器和/或闪烁探测器赋予中子发射率测量兆赫兹能力。由于 ITB 的形成及其与磁通量表面均匀性的偏差而引起的中子/α粒子诞生剖面的变化可以通过在赤道端口插头中添加八个观察弦和从偏滤器到原始径向中子相机的七个观察弦来测量。另一方面，测量受限和逃逸α粒子的分布仍然很困难。目前正在研究解决这些困难的几项提案。
Fusion product measurements planned for ITER are reviewed from the viewpoint of alpha particle-related physics studies. Recent advances in fusion plasma physics have extended the desirable measurement requirements to the megahertz region for neutron emission rate, better resolution of neutron profiles for the study of internal transport barriers (ITBs), etc. Employing threshold counters and/or scintillation detectors confers megahertz capability on neutron emission rate measurement. The changes in the neutron/alpha particle birth profile due to the formation of ITB and its deviation from uniformity on the magnetic flux surface can be measured by addition of eight viewing chords in an equatorial port plug and seven viewing chords from the divertor to the original radial neutron camera. On the other hand, it is still difficult to measure the distributions of confined and escaping alpha particles. Several proposals to resolve these difficulties are currently under investigation.