Characteristics of ion temperature measured with charge-exchange recombination spectroscopy （CXRS） were studied in Ohmic, lower-hybrid-wave （LHW） driven and ion-cyclotron- resonance-frequency （ICRF） heated plasm...Characteristics of ion temperature measured with charge-exchange recombination spectroscopy （CXRS） were studied in Ohmic, lower-hybrid-wave （LHW） driven and ion-cyclotron- resonance-frequency （ICRF） heated plasmas in HT-7. The results indicate that the central ion temperature T10 follows the one-third power law in the product of central line-averaged density Ne and plasma current Ip in Ohmic discharges and is therefore consistent with the Artsimovich scaling law T10 = K （Ip Bt ne R2）1/3. It is shown that there is an appreciable increase of ion temperature during the operation with both LHW and ICRF and that the increment of ion temperature in those shots is mainly due to the energy transfer via collisions between ions and electrons rather that by direct heating of the ions.展开更多
在神户地震灾难后,日本政府的原科学技术厅就提出了综合地震前沿研究项目。在这个项目的框架中,R IKEN和NASDA(National Space Development Agency of Ja-pan,日本国家空间发展协会)两个所需要承担执行为期五年的在地震短临预报中应用...在神户地震灾难后,日本政府的原科学技术厅就提出了综合地震前沿研究项目。在这个项目的框架中,R IKEN和NASDA(National Space Development Agency of Ja-pan,日本国家空间发展协会)两个所需要承担执行为期五年的在地震短临预报中应用电磁现象的可行性研究。从1996年以来,R IKEN研究组就一直从事地电流及其相关现象的研究。同时,在NASDA“地震遥感前沿项目”中,我们从总体上对地震地磁现象进行研究,研究范围不仅包括岩石圈,还包括大气层和电离层。经过五年的研究,发现地震的影响不仅表现在岩石圈(如:超低频(ULF)电磁辐射、声发射等),还会表现在大气层和电离层(通过已有的发射信号)。最重要的是我们发现了以电离层下部(subionospheric)甚低频((VLF)和低频(LF)信号传播为基础的地震-电离层扰动的确凿证据。我们已经开辟了一门新的具有挑战性的科学领域,“岩石圈-大气层-电离层的耦合”或“岩石圈-大气层-电离层耦合系统中的电磁学”。对三圈耦合的研究会对地震短临预报具有重要的科学意义。展开更多
基金supported by the Instruments R&D Project of the Chinese Academy of Sciences (title: Active Beam Spectra Diagnostic)partially supported by National Natural Science Foundation of China (Nos. 10725523, 10975155)the ITER Relevant Foundation in China(No. 2009GB104003)
文摘Characteristics of ion temperature measured with charge-exchange recombination spectroscopy （CXRS） were studied in Ohmic, lower-hybrid-wave （LHW） driven and ion-cyclotron- resonance-frequency （ICRF） heated plasmas in HT-7. The results indicate that the central ion temperature T10 follows the one-third power law in the product of central line-averaged density Ne and plasma current Ip in Ohmic discharges and is therefore consistent with the Artsimovich scaling law T10 = K （Ip Bt ne R2）1/3. It is shown that there is an appreciable increase of ion temperature during the operation with both LHW and ICRF and that the increment of ion temperature in those shots is mainly due to the energy transfer via collisions between ions and electrons rather that by direct heating of the ions.
文摘在神户地震灾难后,日本政府的原科学技术厅就提出了综合地震前沿研究项目。在这个项目的框架中,R IKEN和NASDA(National Space Development Agency of Ja-pan,日本国家空间发展协会)两个所需要承担执行为期五年的在地震短临预报中应用电磁现象的可行性研究。从1996年以来,R IKEN研究组就一直从事地电流及其相关现象的研究。同时,在NASDA“地震遥感前沿项目”中,我们从总体上对地震地磁现象进行研究,研究范围不仅包括岩石圈,还包括大气层和电离层。经过五年的研究,发现地震的影响不仅表现在岩石圈(如:超低频(ULF)电磁辐射、声发射等),还会表现在大气层和电离层(通过已有的发射信号)。最重要的是我们发现了以电离层下部(subionospheric)甚低频((VLF)和低频(LF)信号传播为基础的地震-电离层扰动的确凿证据。我们已经开辟了一门新的具有挑战性的科学领域,“岩石圈-大气层-电离层的耦合”或“岩石圈-大气层-电离层耦合系统中的电磁学”。对三圈耦合的研究会对地震短临预报具有重要的科学意义。
