McDermott R M, Lebschy A, Geiger B, Bruhn C, Cavedon M, Dunne M, Dux R, Fischer R, Kappatou A, Pütterich T, Viezzer E
Max-Planck-Institut für Plasmaphysik, Boltzmannstr. 2, 85748 Garching, Germany.
Max-Planck-Institut für Plasmaphysik, Wendelsteinstr. 1, 17491 Greifswald, Germany.
Rev Sci Instrum. 2017 Jul;88(7):073508. doi: 10.1063/1.4993131.
A new core charge exchange recombination spectroscopy diagnostic has been installed in the ASDEX Upgrade tokamak that is capable of measuring the impurity ion temperature, toroidal rotation, and density on both the low field side (LFS) and high field side (HFS) of the plasma. The new system features 48 lines-of-sight (LOS) with a radial resolution that varies from ±2 cm on the LFS down to ±0.75 cm on the HFS and has sufficient signal to run routinely at 10 ms and for special circumstances down to 2.5 ms integration time. The LFS-HFS ion temperature profiles provide an additional constraint on the magnetic equilibrium reconstruction, and the toroidal rotation frequency profiles are of sufficiently high quality that information on the poloidal velocity can be extracted from the LFS-HFS asymmetry. The diagnostic LOS are coupled to two flexible-wavelength spectrometers such that complete LFS-HFS profiles from two separate impurities can be imaged simultaneously, albeit with reduced radial coverage. More frequently, the systems measure the same impurity providing very detailed information on the chosen species. Care has been taken to calibrate the systems as accurately as possible and to include in the data analysis any effects that could lead to spurious temperatures or rotations.
一种新型的芯部电荷交换复合光谱诊断仪已安装在ASDEX升级托卡马克装置中，该诊断仪能够测量等离子体低场侧（LFS）和高场侧（HFS）的杂质离子温度、环向旋转和密度。新系统具有48个视线（LOS），其径向分辨率在低场侧从±2厘米变化到高场侧的±0.75厘米，并且具有足够的信号，能够在10毫秒的常规运行时间以及特殊情况下低至2.5毫秒的积分时间下运行。低场侧-高场侧离子温度分布为磁平衡重建提供了额外的约束，并且环向旋转频率分布质量足够高，以至于可以从低场侧-高场侧的不对称性中提取关于极向速度的信息。诊断视线与两台灵活波长光谱仪相连，这样可以同时成像来自两种不同杂质的完整低场侧-高场侧分布，尽管径向覆盖范围有所减小。更常见的是，系统测量同一种杂质，从而提供关于所选物种的非常详细的信息。已尽可能精确地校准系统，并在数据分析中纳入任何可能导致虚假温度或旋转的影响。
