Paper 13100-58
Paper 13100-58
Design of a circular slit spectrometer
18 June 2024 • 15:20 - 15:35 Japan Standard Time | Room G214, North - 2F
Abstract
The solar corona has a temperature of millions of K and a series of emission lines in the UV and EUV that have a crucial role in the full understanding of its physics. The only UV coronagraph/spectrometer flown so far is SOHO/UVCS, operative from 1995 to 2009. It was characterized by a 40 arcmin linear slit tangent to the solar limb, moved at different heliocentric heights by means of a tiltable mirror. Different polar angles were explored by rolling the whole instrument. Despite the milestone results it successfully provided, UVCS was not suited to follow the solar corona dynamics: coronal phenomena may evolve on times that range from minutes to hours, while a complete coronal spectrocopic map at full resolution took about 1 day for UVCS to be acquired.
A circular slit with variable radius coupled with a circular grating would reduce by at least 1 order of magnitude the time range for mapping the whole solar corona spectrum. CISS (Circular Slit Spectrometer) is a project funded by the Italian National Institute for Astrophysics (INAF) dedicated to the development of a prototype of such a spectrometer. This work presents the prototype design and the status of the project.
Presenter
CNR-Istituto di Fotonica e Nanotecnologie (Italy)
Federico Landini graduated in Physics in 2002 at the University of Florence (Italy), and obtained his PhD in Astronomy in 2006 with a dissertation on the stray light analysis for the SCORE coronagraph, designed for the sub-orbital mission HERSCHEL (successfully launched in 2009). For more than 15 years he has been working on occulter optimization for other space-borne externally occulted coronagraphs, such as PROBA3/ASPIICS (scheduled to be launched in 2023) and Solar Orbiter/Metis (launched in 2020), and on solar corona data analysis. Moreover, he designed laboratory set-ups for UV optical tests under vacuum, particularly aimed at UV polarimetry. He is currently working on instrument design for the study of the solar corona and on software development. He is CO-I of Solar Orbiter/Metis and PROBA3/ASPIICS.