High beta plasma confinement study on a small torus device with a floating high temperature superconductor coil

带有浮动高温超导线圈的小型环面装置的高β等离子体约束研究

• 批准号: 12308019
• 负责人: OGAWA Yuichi
• 金额: $ 26.69万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12308019/
• 关键词: high beta plasma; internal coil device; high temperature superconductor coil; persistent current switch; ECH plasma production; heating; magnetic levitation; 高べータ; 磁気浮上コイル; 高温超伝導線材; フィードバック制御; GM冷凍機; 高ベータ

We are aiming at studying high-beta plasmas on a small torus device with a high temperature superconductor coil. From the viewpoint of plasma experiment and device operation, we have employed a high temperature superconducting cable Bi-2223, which has a large heat capacity in comparison with a low temperature superconductor. This is a first challenge for applying the high temperature superconductor coil in fusion plasma devices, and there are few challenges for the feedback levitation of the high temperature superconductor coil.We have started several R&D issues for the internal coil device Mini-RT ; e.g., the demonstration of the levitation with the miniature device FB-RT, the design and fabrication of the persistent current switch (PCS) and the demonstration of the persistent current operation, and developments of demountable transfer tube and current feed-through.In the Mini-RT device, we have successfully levitated the high temperature superconductor coil with an accuracy of 10 micrometer during a hour. Since the typical magnetic field is 0.1T around the internal coil, the plasma is produced and heated by the Electron Cyclotron Heating (ECH) with the microwave of 2.45 GHz. The plasma density is (5-7)x10^<16> m^<-3>, and is reaching at the cut-off density of the microwave. The density profile has a peak near the internal coil. The electron and ion temperatures are 10 eV and 1 eV, respectively.

我们的目标是在一个带有高温超导线圈的小型环面装置上研究高β等离子体。从等离子体实验和器件操作的角度出发，我们采用了一种高温超导电缆Bi-2223，与低温超导体相比，它具有更大的热容量。这是高温超导线圈应用于聚变等离子体器件的第一个挑战，高温超导线圈的反馈悬浮几乎没有挑战。我们已经开始了内部线圈设备Mini-RT的几个研发问题；例如，用微型装置FB-RT进行悬浮的演示，持续电流开关（PCS）的设计和制造以及持续电流操作的演示，以及可拆卸转移管和电流馈通的开发。在Mini-RT装置中，我们成功地在一小时内以10微米的精度悬浮高温超导体线圈。由于内部线圈周围的典型磁场为0.1T，因此采用2.45 GHz的微波电子回旋加热（ECH）产生并加热等离子体。等离子体密度为（5-7）× 10^<16> m^<-3>，达到微波的截止密度。密度曲线在内部线圈附近有一个峰值。电子温度为10 eV，离子温度为1 eV。

项目成果

Y.Ogawa, et al.: "Construction of a toroidal plasma confinement device with a floating internal coil for studying high beta plasmas"Journal of Plasma and Fusion Research SERIES. 5. 450-453 (2002)

Y.Okawa 等人：“用于研究高 β 等离子体的带有浮动内部线圈的环形等离子体限制装置的构造”等离子体与聚变研究杂志系列。

OGAWA Yuichi, HIMURA Haruhiko, HIROTA Makoto, HORI Dan, ITOH Atsushi, KONDOH Shigeo, MORIKAWA Junji, NAKASHIMA Chihiro, NIHEI Hitoshi, NUMATA Ryusuke, OHHASHI Manabu, OHKUNI Kohtaro, OHSAKI Shuichi, SAITOH Haruhiko, SHATASHVILI Nana, VOLPONI Francesco, WA

小川佑一、日村春彦、广田诚、堀丹、伊藤厚、近藤茂夫、森川润二、中岛千寻、NIHEI Hitoshi、沼田龙介、大桥学、大国光太郎、大崎修一、斋藤春彦、SHATASHVILI Nana、VOLPONI Francesco, WA

Y.Ogawa, et al.: "Research on High Beta Plasma Based on Two-fluid Relaxation Theory with an Internal Coil Device"Transactions of Fusion Science and Technology. 43巻. 203-207 (2003)

Y.Okawa等人：“基于内部线圈装置的二流体弛豫理论的高β等离子体研究”《聚变科学与技术学报》43. 203-207 (2003)。

Y.Ogawa, et al.: "Design of a toroidal device with a high temperature superconductor coil for non-neutral plasma trap"AIP Conference Proceedings. 606. 691-696 (2002)

Y.Okawa 等人：“用于非中性等离子体陷阱的具有高温超导线圈的环形装置的设计”AIP 会议论文集。

Y.Ogawa, et al.: "Research on high-beta plasmas based on two-fluids relaxation theory"Journal of Plasma and Fusion Research SERIES. 5. 100-105 (2002)

Y.Okawa等人：“基于二流体弛豫理论的高β等离子体研究”等离子体与聚变研究期刊系列。