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Electro-optical Spectro-polarimeter for Ground- and Space-based Solar Coronagraphy S. Fineschi, INAF-Osservatorio Astronomico di Torino, Italy. Proba-3: ESA Formation-flying space coronagraph LC Tunable-filter Polarimeter (LCTP) for the “green line” LCTP Lab performances evaluation
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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
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 OUTLINE
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
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) SET-UP @ TURIN AstronomicalObs. LAB
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)
Coronal Temperature contourlevels:Blue: 1.5106 Kgreen: 2106 K K-corona image by M. Drukmuller
HAO CoMP LC Lyotfilter & Polarimeter FeXIII 1074.7 nm S. Tomczyk, et al. Science 317, 1192 (2007);
LCTP FILTER & ASPIICS telescope @ DOMEc French-italianconcordia base (antartica)? Sky Brightness Monitor @ Concordia J. Arnaud, M. Faroubert, 2009 ESCAPE proposal L. Dame, 2011
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
exit slit 0 -d 0 0 +d Monochromator setting Center wavel.: 530.3 nm FWHM: 0.1 nm
LCTP vs. F-P etalonSpectroscopy 21 Aug., 2011 - Solar Physics and Space Weather Instrumentation IV – San Diego , CA
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 basedSPECTRopolarimeter - cormag 21 Aug., 2011 - Solar Physics and Space Weather Instrumentation IV – San Diego , CA
LCTP basedspectropolarimeter–cormag 21 Aug., 2011 - Solar Physics and Space Weather Instrumentation IV – San Diego , CA