Spectral Imager of the Solar Atmosphere: The First Extreme-Ultraviolet Solar Integral Field Spectrograph Using Slicers
Spectral Imager of the Solar Atmosphere: The First Extreme-Ultraviolet Solar Integral Field Spectrograph Using Slicers
复制标题
DOI：
10.3390/aerospace11030208
复制
发表时间：
2024-03
期刊：
影响因子：
2.6
通讯作者：
Ariadna Calcines Rosario;F. Auchère;Alain Jody Corso;G. del Zanna;J. Dudík;Samuel Gissot;Laura A. Hayes;Graham S. Kerr;C. Kintziger;Sarah A. Matthews;Sophie Musset;D. Orozco Suárez;Vanessa Polito;H. Reid;D. Ryan
中科院分区：
文献类型：
--
作者：
Ariadna Calcines Rosario;F. Auchère;Alain Jody Corso;G. del Zanna;J. Dudík;Samuel Gissot;Laura A. Hayes;Graham S. Kerr;C. Kintziger;Sarah A. Matthews;Sophie Musset;D. Orozco Suárez;Vanessa Polito;H. Reid;D. Ryan
粒子加速和高能粒子的热化是贯穿整个宇宙的基本过程。虽然太阳是研究这一现象的极好对象，因为它是太阳系中能量最高的粒子加速器，但这种现象也出现在许多其他天体物理对象中，如活动星系核、黑洞、中子星、伽马射线暴、太阳和恒星日冕、吸积盘和行星磁层。对极端紫外线(EUV)的观测对于这些研究是必不可少的，但只能在太空中进行。目前在EUV中运行的光谱仪使用入射狭缝，并使用扫描机构覆盖所需的视场。这导致了相对较慢的图像节奏，在几分钟的数量级上捕捉到了固有的快速和瞬时过程，和/或在光谱仪狭缝中“错过了动作”。因此，图像切片器在极紫外积分场谱仪中的应用是革命性的。这项技术的发展将使从整个2D视场观察EUV光谱在几秒钟内完成，比目前可能的速度快两个数量级以上。太阳大气光谱成像(SISA)仪器是建议在∼180ä观测的第一台集成场光谱仪，它以高效和紧凑的布局结合了图像切片器技术和弯曲衍射光栅，同时为日冕和耀斑等离子体的特征提供重要的光谱诊断。本文介绍了SISA的特点、面临的主要挑战以及为使图像切片器技术能够应用于EUV而正在进行的活动。
Particle acceleration, and the thermalisation of energetic particles, are fundamental processes across the universe. Whilst the Sun is an excellent object to study this phenomenon, since it is the most energetic particle accelerator in the Solar System, this phenomenon arises in many other astrophysical objects, such as active galactic nuclei, black holes, neutron stars, gamma ray bursts, solar and stellar coronae, accretion disks and planetary magnetospheres. Observations in the Extreme Ultraviolet (EUV) are essential for these studies but can only be made from space. Current spectrographs operating in the EUV use an entrance slit and cover the required field of view using a scanning mechanism. This results in a relatively slow image cadence in the order of minutes to capture inherently rapid and transient processes, and/or in the spectrograph slit ‘missing the action’. The application of image slicers for EUV integral field spectrographs is therefore revolutionary. The development of this technology will enable the observations of EUV spectra from an entire 2D field of view in seconds, over two orders of magnitude faster than what is currently possible. The Spectral Imaging of the Solar Atmosphere (SISA) instrument is the first integral field spectrograph proposed for observations at ∼180 Å combining the image slicer technology and curved diffraction gratings in a highly efficient and compact layout, while providing important spectroscopic diagnostics for the characterisation of solar coronal and flare plasmas. SISA’s characteristics, main challenges, and the on-going activities to enable the image slicer technology for EUV applications are presented in this paper.