Spectral line profiles of filaments/prominences to be observed by the Fast Imaging Solar Spectrograph (FISS) are studied. The main spectral lines of interests are Hα Ca II 8542, and Ca II K. FISS has a high spectral resolving power of 2 x 105, and supports simultaneous dual-band recording. This instrument will be installed at the 1.6m New Solar Telescope (NST) of Big Bear Solar Observatory, which has a high spatial resolution of 0.065" at 500nm. Adopting the cloud model of radiative transfer and using the model parameters inferred from pre-existing observations, we have simulated a set of spectral profiles of the lines that are emitted by a filament on the disk or a prominence at the limb. Taking into account the parameters of the instrument, we have estimated the photon count to be recorded by the CCD cameras, the signal-to-noise ratios, and so on. We have also found that FISS is suitable for the study of multi-velocity threads in filaments if the spectral profiles of Ca II lines are recorded together with Hα lines

• KWANGSU AHN(Department of Physics and Astronomy, Seoul National University) Corresponding Author
• JONGCHUL CHAE(Department of Physics and Astronomy, Seoul National University)
• HYUNG-MIN PARK(Korea Astronomy and Space Science Institute, Dpartment of Astronomy and Space Science, Chungnam National University)
• JAKYOUNG NAH(Korea Astronomy and Space Science Institute)
• YOUNG-DEUK PARK(Korea Astronomy and Space Science Institute)
• BI-HO JANG(Korea Astronomy and Space Science Institute)
• YONG-JAE MOON(Department of Astronomy and Space Science, Kyunghee University)