Development of a Novel Ion-Current Semiconductor Detector Array Using a Self-Collection Method for Secondary-Electron Suppression

利用自收集方法开发新型离子电流半导体探测器阵列以抑制二次电子

• 批准号: 17540465
• 负责人: HIRATA Mafumi
• 金额: $ 2.3万
• 依托单位: University of Tsukuba
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-17540465/
• 关键词: Tandem Mirror Plasma; Fusion; Potential Formation; Semiconductor Ion Detector; End-Loss Currents; Ion Diagnostics; Electron Diagnostics; Plasma Confinement

For the purpose of observations of the space profile on absolute values of ion-and electron-end-loss currents for plasma confinement studies in open-field plasma devices, a compact-sized electrostatic end-loss-current detector array is proposed on the basis of a self-collection principle for suppressing the effects of secondary-electron emission from a metal collector. For employing this specific method, it is worth noting that no further additional magnetic systems except the ambient open-ended magnetic fields are required for the detector structure. This characteristic property provides a compactness of the total detection system and availability for its use in plasma confinement devices without disturbing plasma-confining magnetic fields. The detector consists of a set of parallel metal plates with respect to lines of ambient magnetic forces of a plasma device for analyzing incident ion currents along with a grid for shielding the collector against strays due to the metal-plate biasing. The characterization experiments are carried out by the use of a test-ion-beam line along with an additional use of a Helmholtz coil system for the formation of open magnetic fields similar to those in the GAMMA10 end region. Availability of the detector is clearly demonstrated in the GAMMA10 plasma experiments.

为了观测开放场等离子体装置中等离子体约束研究中离子和电子端损电流绝对值的空间分布，提出了一种基于自收集原理的紧凑型静电端损电流检测器阵列，以抑制金属收集器二次电子发射的影响。对于采用这种特定的方法，值得注意的是，除了探测器结构需要环境开放式磁场外，不需要其他额外的磁系统。这种特性提供了整个检测系统的紧凑性和在等离子体约束装置中使用的可用性，而不会干扰等离子体约束磁场。探测器包括一组相对于等离子体装置的环境磁力线的平行金属板，用于分析入射离子电流，以及用于屏蔽收集器免受由于金属板偏置而产生的杂散的栅格。表征实验是通过使用测试束流线以及额外使用亥姆霍兹线圈系统来形成类似于GAMMA10端区的开放磁场来进行的。该探测器的可用性在GAMMA10等离子体实验中得到了清楚的证明。

项目成果

Simultaneous Measurements of Ion and Electron Currents Using a Novel Compact Electrostatic End-Loss-Current Detector

使用新型紧凑型静电端损电流检测器同时测量离子和电子电流

• 发表时间: 2006
• 期刊: Review of Scientific Instruments Vol. 77,No. 10
• 作者: Hoshino;M.;Kimata;M.;Arakawa;Y.;Nishida;N. and Shimizu;M.;M.Hirata et al.
• 通讯作者: M.Hirata et al.

A Novel Position-Sensitive Ion-Current Detector Array Usinga Self-Collection Method for Secondary-Electron Suppression

采用自收集方法抑制二次电子的新型位置敏感离子电流探测器阵列

• 发表时间: 2007
• 期刊: Nuclear Instruments and Methods in Physics ResearchA 573
• 作者: M. Hirata;et. al.
• 通讯作者: et. al.

Long-term observations of x-ray energy responses of semiconductor detectors after neutron irradiation

中子辐照后半导体探测器X射线能量响应的长期观测

• 发表时间: 2005
• 期刊: Photon Factory Activity Report 2004 Vol.22
• 作者: Shinmura;T. and Arakawa;Y.;T.Cho et al.;安藤 利得;三好雅也・新村太郎・荒川洋二;T.Cho et al.;安藤 利得;T.Cho et al.;新村太郎・荒川洋二;大林 雅俊;J.Kohagura et al.
• 通讯作者: J.Kohagura et al.

イオン電流量計測器

离子电流计

• 发表时间: 2005

Progress in potential formation and findings in the associated radially sheared electric-field effects on suppressing intermittent turbulent vortex-like fluctuations and reducing transverse losses

潜在形成的进展以及相关径向剪切电场对抑制间歇性湍流涡旋状波动和减少横向损失的影响的发现

• 发表时间: 2005
• 期刊: Nulcear Fusion 45
• 作者: T.Cho;J.Kohagura;M.Hirata;(共著)
• 通讯作者: (共著)