Study of high energy ion behavior using multi-channel neutral particle analyzer and advanced pellet injection

飞行时间(TOF)型中性粒子分析仪是从1997财年开始为大型螺旋装置(LHD)开发、校准和测试的。从1998财年开始，LHD上的等离子体实验就开始大刀阔斧地启动。同时还安装了分析仪。初步数据是从1998财年下半年获得的。常规数据采集可以在FYI999上完成。利用该分析仪的水平扫描可以清楚地观察到来自NBI和ICH的高能粒子的行为。高能粒子的光谱与模拟结果相吻合。TOF分析仪的调试得到了Frascati人的很大帮助。关于数据的分析，与他们进行了讨论，因为他们有使用分析仪进行校准的经验。1997财年至1998财年，经过日俄两国科学家的验证，研制出了先进的多层颗粒注射装置。在紧凑型螺旋系统(CHS)上进行了弹丸注入实验。离子输运系数可以通过测量小球发射强度的空间分布来获得。计算结果与理论计算结果吻合较好。从1999财年起，该设备也已安装在铲运机上。在第三次实验活动结束时，可以成功地进行几次颗粒注入，并获得了一些关于杂质输运的数据。在铲运机上，由于缺乏数据量，无法对实验结果和理论结果进行充分的比较。我们期待着下一次战役的结果，因为初步试验已经成功

The time-of-flight (TOF) type neutral particle analyzer has been developed, calibrated and tested for the Large Helical Device (LHD) from FY1997. The plasma experiments on LHD has aggressively stared from FY1998. The analyzer has been installed at the same time. The preliminary data have been obtained from the latter half of FY1998. The routine data acquiring could be done from FYI999. The behaviors of high energy particles from NBI and ICH could be clear by using horizontal scan of the analyzer. The spectrum of the high energy particles agreed with those from the simulation. The tuning of TOF analyzer has been helped a lot by the Frascati people. Concerning about the analyzing the data has been discussed with them because they have experience of the calibration with the analyzer.The advanced multi-layer pellet injection device has been developed by the corroboration between Japanese and Russian scientists from FY1997 to FY1998. The pellet injection experiments have been performed in the Compact Helical System (CHS). The ion transport - coefficient could be obtained by measuring the spatial distribution of the emission intensity from the pellet. The result was in quite good agreement with the theoretical result. The device has also been installed in LHD from FY1999. At the end of the third experimental campaign, a few pellet injections could be succeeded and some data about the impurity transport could be obtained. In LHD, the sufficient comparison between the experimental and theoretical results could not be performed due to the lack of the data amounts. We expect the result in the next campaign because the preliminary trial was succeeded