...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Nuclear fusion >Deuterium retention in carbon flakes and tungsten-carbon mixed flakes produced by deuterium arc discharge
【24h】

Deuterium retention in carbon flakes and tungsten-carbon mixed flakes produced by deuterium arc discharge

机译：氘电弧放电产生的碳薄片和钨碳混合薄片中的氘保留

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In order to estimate the in-vessel tritium inventory of carbon flakes or dust, deuterium gas absorption and deuterium ion irradiation experiments were conducted on carbon flakes prepared by using electron beam evaporation of graphite. The retained amount of deuterium after the deuterium gas absorption was very low; D/C = 10(-3) atomic ratio. The retained amount of deuterium after the deuterium ion irradiation was very similar when compared with that for graphite. The deuterium concentration of the carbon flakes resulting from ion irradiation becomes close to zero if the wall temperature is higher than 1000 K. Co-deposited carbon flakes were prepared by a deuterium arc discharge with carbon electrodes at different gas pressures and substrate temperatures. The co-deposited carbon flakes had a high deuterium concentration. Under such conditions with gas pressure of 1 Pa and wall temperature of 573 K, the deuterium concentration becomes approximately D/C = 0.2. In a DT fusion device like ITER, we therefore, expect a T/C ratio of 0.1. This value is presumed to be an upper limit of carbon flakes in ITER since the wall temperature may be higher than 573 K. Tungsten-carbon mixed flakes were also produced by the deuterium arc discharge with carbon and tungsten electrodes. The deuterium was trapped mainly in the carbon atoms and the structure of carbon in the tungsten-carbon mixed flakes was more amorphous compared with that of the co-deposited carbon flakes. Then, the deuterium concentration was higher than that of the carbon flakes, and increased with the increase in the concentration of tungsten. The higher concentration in the tungsten-carbon mixed flakes may not affect the in-vessel tritium inventory if the tungsten concentration is low.
机译：为了估计碳薄片或粉尘的船内inventory存量，对使用石墨的电子束蒸发制得的碳薄片进行了氘气吸收和氘离子辐照实验。吸收氘气后氘的保留量非常低； D / C = 10（-3）原子比。与石墨相比，氘离子辐照后的氘保留量非常相似。如果壁温高于1000 K，则由离子辐照产生的碳薄片中的氘浓度接近于零。通过氘弧放电和碳电极在不同气压和衬底温度下制备共沉积碳薄片。共沉积的碳薄片具有高的氘浓度。在这样的条件下，气压为1 Pa，壁温为573 K，氘浓度约为D / C = 0.2。因此，在像ITER这样的DT融合设备中，我们期望T / C比为0.1。由于壁温度可能会高于573 K，因此该值被认为是ITER中碳薄片的上限。钨-碳混合薄片也是通过用碳和钨电极进行氘弧放电而产生的。氘主要捕集在碳原子中，与共沉积碳片相比，钨-碳混合片中的碳结构更加无定形。然后，氘浓度高于碳薄片，并且随着钨浓度的增加而增加。如果钨的浓度低，则钨-碳混合薄片中的较高浓度可能不会影响船内inventory的存量。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号