Electro-optical Spectro-polarimeter for Ground- and Space-based Solar Coronagraphy S. Fineschi, INAF-Osservatorio Astronomico di Torino, Italy May 9th, 2012 - MP1104 COST Action 1st WG meeting, Warsaw

OUTLINE Proba-3: ESA Formation-flying space coronagraph LC Tunable-filter Polarimeter (LCTP) for the “green line” LCTP Lab performances evaluation Eclipse 2010 observations with LCTP prototye Case for ground-based emission-line coronagraphy in Europe

ESA PROBA-3 (ESA Startiger: 2009-10 Phase-A) Formation-Flying Coronagraph A coronagraph with the external occulter on one spacecraft and the optical instrument on the other spacecraft at ~150 meters from the first one. Proba-3 – ESA: launch 2017. ASPIICS: 2009 selection; 2010 Phase-A (Startiger); 2012 Phase-B

ASPIICS LC Lyot filter

Liquid-crystal Tunable Lyot Filter for Solar Coronagraphy

LC Tunable-filter & Polarimeter Procurement

LCTP Perfomances

SET-UP @ TURIN Astronomical Obs. LAB Monochr. slit width= 25 µm; height = 6 mm Monochr. spectrum= CW 530.3 nm; FWHM = 0.1nm Collim. lens (L1) f = 140 mm Camera lens (L2) f = 1130 mm CCD pixel sixe = 25 Spatial scale = 5 arcsec/pix (ASPIICS: 3 arcsec/pix)

LCTP SPECTRAL tests

0° 45° 90° 135°

LC SPACE VALIDATION (rad-hardness) Proba-3 rad-hard requirement (Summary Mission Requirements: ESA P3-EST-TN-7002) 1996 –  1.5 Mrad of < 32 MeV e- (Graham et al., SPIE 2811) 1998 –  12 krad of  20 MeV protons (Noto et al., Opt. Eng.) 2007 –  50 krad of -rad; Thermal-vac; Vibe tests (Heredero et al., Appl. Opt. 46) 2009-2010 –  50 krad 100 MeV p+, 10 MeV e- ESA-ITT “LC Space Validation for SolO”

The CorMag was operated during the total solar eclipse of July, 11th 2010 on Tatakoto Atoll (French Polynesia)

LCTP based spectropolarimeter–cormag

Coronal Temperature contour levels: Blue: 1.5106 K green: 2106 K K-corona image by M. Drukmuller

HAO CoMP LC Lyot filter & Polarimeter FeXIII 1074.7 nm S. Tomczyk, et al. Science 317, 1192 (2007);

COMP observations. HAO model . S. Gibson courtesy, 2012

CoMP-S instrument @ Lomnicky Peak Observatory (SLOVAK R.)

LCTP FILTER @ CLIMSO CORONAGRAPH PIc du midi (france)?

Sky Brightness Monitor @ Concordia LCTP FILTER & ASPIICS telescope @ DOMEc French-italian concordia base (antartica)? Sky Brightness Monitor @ Concordia J. Arnaud, M. Faroubert, 2009 ESCAPE proposal L. Dame, 2011

Thanks !!!

Liquid-crystal Tunable Lyot Filter for Solar Coronagraphy The LCTP achieves all the spectroscopy performances expected from the F-P etalon The LCTP has additional science capabilities (e.g., polarimetry, simultaneous spectroscopy & high-res imaging) ESA completed a LC space validation program The LCTP operational advantages: no mechs, some science preserved even in “fail state”, OPS monitoring capability also during coronal images acquisition 21 Aug., 2011 - Solar Physics and Space Weather Instrumentation IV – San Diego , CA

SET-UP @ OATo LAB

0 -d 0 0 +d exit slit Monochromator setting Center wavel.: 530.3 nm FWHM: 0.1 nm 0 -d 0 0 +d exit slit

LCTP vs. F-P etalon Spectroscopy 21 Aug., 2011 - Solar Physics and Space Weather Instrumentation IV – San Diego , CA

LC Tunable-filter

LCTP and F-P Characteristics Liquid-crystal Tunable Lyot Filter for Solar Coronagraphy LCTP and F-P Characteristics 21 Aug., 2011 - Solar Physics and Space Weather Instrumentation IV – San Diego , CA

LCTP based SPECTRopolarimeter - cormag 21 Aug., 2011 - Solar Physics and Space Weather Instrumentation IV – San Diego , CA

LCTP based spectropolarimeter–cormag 21 Aug., 2011 - Solar Physics and Space Weather Instrumentation IV – San Diego , CA