For the public having a better understanding of solar activities,the Educational Adaptive-optics Solar Telescope(EAST)was built in July 2021 and is located at the Shanghai Astronomy Museum.The EAST consists of a 65 cm...For the public having a better understanding of solar activities,the Educational Adaptive-optics Solar Telescope(EAST)was built in July 2021 and is located at the Shanghai Astronomy Museum.The EAST consists of a 65 cm aperture solar telescope with a 177-element adaptive optics system and two-channel high resolution imaging system at the Hαand TiO bands,in addition to three full disk solar telescopes at CaK,Hαand TiO bands equipped on the tube of the main telescope.In this paper,the configuration of the EAST is described.Its performance and on-sky observational results are presented.The EAST,to our knowledge,is the most advanced solar telescope for the popularization of science in the world.Due to its excellent performance,the data acquired by the EAST can also be used for research on solar physics and space weather prediction.展开更多
The solar grating spectrometer is an essential tool to study the thermodynamics properties of the solar atmosphere with different height distributions, but its imaging performance will be degraded by the wavefront abe...The solar grating spectrometer is an essential tool to study the thermodynamics properties of the solar atmosphere with different height distributions, but its imaging performance will be degraded by the wavefront aberration generalized by the atmospheric turbulence. On the other hand, the narrow slit of the grating spectrometer will filter the wavefront aberration to some extent. The influence of the filter slit on the wavefront aberration and the correction requirement of the adaptive optics are analyzed theoretically and experimentally. We demonstrate that the influence of filter slit on the different types and magnitudes of wavefront aberration is different, and the RMS value of the wavefront aberration less than 0.3λ is down to below almost 60% after the filter slit, and it can lower the correction range requirement of the adaptive optics. The numerical simulation and experiment results show that: after the adaptive optics correction, the influence of the wavefront aberration on the spectral resolution is neglected, and the energy utilization is considerably improved;both numerical simulation and experiment results are in good agreement.展开更多
Large-aperture solar telescopes play an important role in solar observations and research,and require high temporal and spatial resolution[1].To solve some fundamental problems such as the solar dynamo,coronal heating...Large-aperture solar telescopes play an important role in solar observations and research,and require high temporal and spatial resolution[1].To solve some fundamental problems such as the solar dynamo,coronal heating,and the triggering of major solar eruptions,the spatial resolution for solar-atmosphere observation should reach at least 0.1 arcsec[2].展开更多
基金supported by the National Natural Science Foundation of China(NSFC,Grant Nos.11727805,11703029,11733005 and 12103057)。
文摘For the public having a better understanding of solar activities,the Educational Adaptive-optics Solar Telescope(EAST)was built in July 2021 and is located at the Shanghai Astronomy Museum.The EAST consists of a 65 cm aperture solar telescope with a 177-element adaptive optics system and two-channel high resolution imaging system at the Hαand TiO bands,in addition to three full disk solar telescopes at CaK,Hαand TiO bands equipped on the tube of the main telescope.In this paper,the configuration of the EAST is described.Its performance and on-sky observational results are presented.The EAST,to our knowledge,is the most advanced solar telescope for the popularization of science in the world.Due to its excellent performance,the data acquired by the EAST can also be used for research on solar physics and space weather prediction.
文摘The solar grating spectrometer is an essential tool to study the thermodynamics properties of the solar atmosphere with different height distributions, but its imaging performance will be degraded by the wavefront aberration generalized by the atmospheric turbulence. On the other hand, the narrow slit of the grating spectrometer will filter the wavefront aberration to some extent. The influence of the filter slit on the wavefront aberration and the correction requirement of the adaptive optics are analyzed theoretically and experimentally. We demonstrate that the influence of filter slit on the different types and magnitudes of wavefront aberration is different, and the RMS value of the wavefront aberration less than 0.3λ is down to below almost 60% after the filter slit, and it can lower the correction range requirement of the adaptive optics. The numerical simulation and experiment results show that: after the adaptive optics correction, the influence of the wavefront aberration on the spectral resolution is neglected, and the energy utilization is considerably improved;both numerical simulation and experiment results are in good agreement.
基金supported by the National Natural Science Foundation of China(Grant No.11727805)the Youth Innovation Promotion Association,Chinese Academy of Sciences(Grant No.2018412)。
文摘Large-aperture solar telescopes play an important role in solar observations and research,and require high temporal and spatial resolution[1].To solve some fundamental problems such as the solar dynamo,coronal heating,and the triggering of major solar eruptions,the spatial resolution for solar-atmosphere observation should reach at least 0.1 arcsec[2].
