Perks C, Vezinet D, Rice J E, Reinke M L
Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
Commonwealth Fusion Systems, Devens, Massachusetts 01434, USA.
Rev Sci Instrum. 2024 Aug 1;95(8). doi: 10.1063/5.0219521.
SPARC will be outfitted with three systems of x-ray crystal spectrometer arrays. Two of these are designed using cylindrically bent crystals to achieve high spectral-resolution for ion temperature and toroidal velocity measurements via imaging He-like Kr and Ne-like Xe. The last acts as a spectral survey system to monitor Ne-like W and nearby H- and He-like emission from Cr, Fe, Co, Ni, and Cu. Line radiation intensities are calculated using the Flexible Atomic Code for atomic data and ColRadPy for collisional-radiative modeling, then convoluted with a Voigt line shape. Free-free, free-bound, and two-photon continuum radiation is also included. The ToFu code is used to perform volume-of-sight integration to produce synthetic detector images. In addition, presented is cross-validation performed using the XICSRT Monte Carlo ray-tracing code. Ion temperature and toroidal velocity profiles are reconstructed using ToFu via tomographic inversion.
SPARC将配备三个X射线晶体光谱仪阵列系统。其中两个采用圆柱形弯曲晶体设计，通过对类氦氪和类氖氙成像来实现对离子温度和环向速度测量的高光谱分辨率。最后一个作为光谱测量系统，用于监测类氖钨以及来自铬、铁、钴、镍和铜的附近类氢和类氦发射。使用灵活原子代码获取原子数据，并使用ColRadPy进行碰撞辐射建模来计算线辐射强度，然后与洛伦兹线型卷积。还包括自由-自由、自由-束缚和双光子连续辐射。ToFu代码用于进行视体积积分以生成合成探测器图像。此外，还展示了使用XICSRT蒙特卡罗射线追踪代码进行的交叉验证。通过断层反演，使用ToFu重建离子温度和环向速度剖面。
