Development of Pellet Injecitn Method with the Continuous-Controllability of Pellet Size and Studies on the Injection into Plasmas

颗粒尺寸连续可控的颗粒注射方法的开发及血浆注射研究

• 批准号: 05452397
• 负责人: SATO Kohnosuke
• 金额: $ 2.18万
• 依托单位: Naitonal Institute for Fusion Science
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05452397/
• 关键词: Ice Pellet; Pellet Injector; Size-Controllability; Toroidal Plasma; ペレット入射; サイズ可変入射; トーラスプラズマ

In order to study basic properties of toroidal plasmas by pellet injection, it is extremely desirable for the pellet injector to be reproducible and to be controllable. Until now, several injectors were developed in some places, where one could vary pellet size to a certain extent. However, they could vary it only in a discrete manner. In our present study, a new injector has been designed and constructed in order to develop a technique with continuous size-controllability.The injector has been developed so as to vary a pellet size by using a special technique of a pellet-length limiting rod. The first results were not satisfactory ; that is, the obtained pellet sizes were not consistent with the presetting values. The reason was ocnsidered to be partially because that an attachment force of solid hydrogen and metal surface of the length-limiting rod might have disturbed the expected operation, and partially because that the pressure of hydrogen gas for producing ice pellet might also … More have disturbed the expected operation.Various materials has been tested as a head of length-limiting rod and as a coating stuff on it. Experiments for comparison ofthe results with and without the hydrogen gas in the ice pellet production part have also been carried out. In addition to these studies, the effect of various shape of the pellet production cavity has been examined, which might have some influence in rsisting the attachment force of a pellet and the rod. Those results showed each effect to some extent, but each of it was not a perfect one.Finally the improvement of the operaiton procedure in controlling a pellet size has been considered and tested. The idea is to change the pellet production position in order to eliminate the possibility of attachment of solid hydrogen and the surface of the length-limiting rod. The final results show very good agreemtne between the observed size and the presetting value. The pellet size has been measured by using a high-speed framing photograph just after the ejection from the muzzle. Thus, the technique will become a useful method for this field.By using this newly developed injector, various injection experiments have been carried out, and several interesting phenomena have been observed. Less

为了研究弹丸注入环形等离子体的基本性质，弹丸注入器的可重复性和可控性是非常必要的。到目前为止，在某些地方开发了几种喷射器，其中可以在一定程度上改变颗粒尺寸。然而，他们只能以离散的方式改变它。本研究设计并制造了一种新的注射器，该注射器通过使用一种特殊的弹丸长度限制杆技术来改变弹丸的尺寸，以发展一种具有连续尺寸可控性的技术。第一个结果并不令人满意;也就是说，获得的颗粒尺寸与预设值不一致。其原因被认为部分是因为固体氢与限长杆金属表面的附着力可能干扰了预期的操作，部分是因为用于生产冰球的氢气压力也可能影响到预期的操作。 ...更多信息 对各种材料作了限长杆头和限长杆头上的涂层材料的试验，并对在冰球生产部分有无氢气进行了对比试验。除此之外，还研究了不同形状的球芯生产腔对提高球芯与棒的附着力的影响。这些结果在一定程度上反映了每一种效果，但每一种效果都不是完美的。最后，对控制球团粒度的操作程序进行了改进和试验。其想法是改变芯块生产位置，以消除固体氢与限长棒表面附着的可能性。最后的计算结果表明，实测尺寸与设定值之间有很好的一致性。弹丸的大小是用刚从枪口射出后的高速分幅照片测得的。利用这种新研制的喷射器进行了各种喷射实验，观察到了一些有趣的现象。少

项目成果

K.Nakakita, S.Kogoshi, K.N.Sato, N.Noda, K.H.Finken: "Chaotic Properties of the Electron Temperature Fluctuations at the Center of TEXTOR Tokamak Plasmas during Sawtooth Activity" J.of Plasma and Fusion Research. 71. 554 (1995)

K.Nakakita、S.Kogoshi、K.N.Sato、N.Noda、K.H.Finken：“锯齿活动期间 TEXTOR 托卡马克等离子体中心电子温度波动的混沌特性”J.of Plasma and Fusion Research。

佐藤浩之助: "トーラスプラズマへのペレット入射研究" 電気学会論文誌. 113-A. 801-808 (1993)

Hironosuke Sato：“将颗粒注入环面等离子体的研究”，日本电气工程师学会汇刊 113-A（1993 年）。

K.H.Finken, K.N.Sato, H.Akiyama, G.Fuchs, R.Jaspers, S.Kogoshi, H.R.Koslowski, G.Mank, H.Sakakita, M.Sakamoto, M.Sander, H.Soltwisch: "Characteristics of Pellet Injected Discharges in TEXTOR" A I P Conf.Proc.345 : International Conference on Plasma Physic

K.H.Finken、K.N.Sato、H.Akiyama、G.Fuchs、R.Jaspers、S.Kogoshi、H.R.Koslowski、G.Mank、H.Sakakita、M.Sakamoto、M.Sander、H.Soltwisch：“注射颗粒的特性

K.N.Sato, H.Akiyama, K.H.Finken, G.Fuchs, S.Kogoshi, H.R.Koslowski, N.Noda, H.Sakakita, Sakamoto, H.Soltwisch, KFA TEXTOR Team: "Studies on Snake-Like Density Oscillations by Pellet Injection in the TEXTOR Plasmas" 20th Europ.Conf.on Controlled Fusion and

K.N.Sato、H.Akiyama、K.H.Finken、G.Fuchs、S.Kogoshi、H.R.Koslowski、N.Noda、H.Sakakita、Sakamoto、H.Soltwisch、KFA TEXTOR 团队：“通过颗粒注射进行蛇状密度振荡的研究”

S.Katsuki, H.Akiyama, T.Yamada, N.Eguchi, S.Maeda, K.N.Sato: "Railgun Using Plasma Initiation Separated from the Projectile" IEEE Trans.on Plasma Science. PS-21. 755 (1993)

S.Katsuki、H.Akiyama、T.Yamada、N.Eguchi、S.Maeda、K.N.Sato：“使用与射弹分离的等离子体启动的轨道炮”IEEE Trans.on 等离子体科学。