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Spectropolarimetry package for visible emission line coronagraph (VELC) on board Aditya-L1 mission

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Abstract

One of the unique features of Visible Emission Line Coronagraph (VELC) on board Aditya-L1 mission is spectropolarimetric observations in coronal emission line centred at 10747 Å. Spectropolarimetric observations at 10747 Å helps in understanding coronal magnetic field topology and Line of Sight (LOS) field strength measurements. Coronal magnetic field measurements provide useful information about the drivers for space weather. To carry out the polarimetric observations a dual beam spectropolarimeter is employed in the VELC. Spectropolarimeter package consists of a Quarter Wave Plate (QWP), Polarizing Beam Displacer (PBD) and Half Wave Plate (HWP). Current manuscript provides an overview of the design of spectropolarimetric channel of VELC and the realization aspects.

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References

  1. Aschwanden, M.J.: Physics of the Solar Corona. An Introduction with Problems and Solutions. 2nd edn. (2005)

  2. Bass, M., DeCusatis, C., Enoch, J., Lakshminarayanan, V., Li, G., Macdonald, C., Mahajan, V., Van Stryland, E.: Handbook of Optics, Third Edition Volume II: Design, Fabrication and Testing, Sources and Detectors, Radiometry and Photometry. 3rd edn. McGraw-Hill, Inc., USA (2009)

  3. Bak-Stȩślicka, U., Gibson, S.E., Fan, Y., Bethge, C., Forland, B., Rachmeler, L.A.: The magnetic structure of solar prominence cavities: new observational signature revealed by coronal magnetometry. Astrophys. J. Lett. 770(2), L28 (2013)

    Article  ADS  Google Scholar 

  4. Casini, R., Judge, P.G.: Spectral lines for polarization measurements of the coronal magnetic field. II. consistent treatment of the stokes vector for magnetic-dipole transitions. Astrophys. J. 522(1), 524–539 (1999)

    Article  ADS  Google Scholar 

  5. Collett, E.: Field Guide to Polarization. Society of Photo Optical, Field Guide Series (2005)

  6. Dove, J., Rachmeler, L., Gibson, S.E., Judge, P.G., Tomczyk, S.: A ring of polarized light: evidence for twisted coronal magnetism in cavities (Invited). In: AGU Fall Meeting Abstracts, vol. 2010, pp. SH54A–01 (2010)

  7. Harvey, J.W., Sheeley, N.R.J.: Coronal holes and solar magnetic fields (article published in the special issues: proceedings of the symposium on solar terrestrial physics held in Innsbruck, May-June 1978. (pp. 137-538)). Space Sci. Rev. 23(2), 139–158 (1979)

    Article  ADS  Google Scholar 

  8. Judge, P.G.: Spectral lines for polarization measurements of the coronal magnetic field. I. Theoretical intensities. Astrophys. J. 500(2), 1009–1022 (1998)

    Article  ADS  Google Scholar 

  9. Judge, P.G., Casini, R., Tomczyk, S., Edwards, D.P., Francis, E.: Coronal magnetometry: a feasibility study. NASA STI/Recon Technical Report N (2001)

  10. Judge, P.G., Low, B.C., Casini, R.: Spectral lines for polarization measurements of the coronal magnetic field. IV. stokes signals in current-carrying fields. Astrophys. J. 651(2), 1229–1237 (2006)

    Article  ADS  Google Scholar 

  11. Kuhn, J.R. Penn, M.J.: Infrared tools for solar astrophysics: What’s next? In: InFrared Tools for Solar Astrophysics: What’s next? (1995)

  12. Kumar, N., Prasad, B., Singh, J., Venkata, S.: Optical design of visible emission line coronagraph on indian space solar mission aditya-l1. Exp. Astron. (2018)

  13. Lin, H., Kuhn, J.R., Coulter, R.: Coronal magnetic field measurements. Astrophys. J. Lett. 613(2), L177–L180 (2004)

    Article  ADS  Google Scholar 

  14. Lin, H., Penn, M.J., Tomczyk, S.: A new precise measurement of the coronal magnetic field strength. Astrophys. J. Lett. 541(2), L83–L86 (2000)

    Article  ADS  Google Scholar 

  15. Narra, V.S., Prasad, B.R., Kumar, S.P., Kathiravan, S., Natarajan, V., Kamath, P.U., Tulasi, M.V., Suresha, B., Rajesh, N.: Scatter due to ultraviolet (uv) photopolymerization of molecular contamination on optical surfaces. Exp. Astron. 50(2), 265–287 (2020)

    Article  ADS  Google Scholar 

  16. Prasad, B.R., Banerjee, D., Singh, J., Nagabhushana, S., Kumar, A., Kamath, P.U., Kathiravan, S., Venkata, S., Rajkumar, N., Natarajan, V., Juneja, M., Somu, P., Pant, V., Shaji, N., Sankarsubramanian, K., Patra, A., Venkateswaran, R., Adoni, A., Narendra, S., Haridas, T.R., Mathew, K.S., Mohan, K., Amareswari, K., Jaiswal, B.: Visible emission line coronagraph on Aditya-L1. Curr. Sci. 113, 613–615 (2017)

    Article  ADS  Google Scholar 

  17. Singh, J., Prasad, R.B., Venkata, S., Kumar, A.: Exploring the outer emission corona spectroscopically by using visible emission line coronagraph (velc) on board aditya-l1 mission. Adv. Space Res. 64(7), 1455–1464 (2019)

    Article  ADS  Google Scholar 

  18. Tomczyk, S., Card, G.L., Darnell, T., Elmore, D.F., Lull, R., Nelson, P.G., Streander, K.V., Burkepile, J., Casini, R., Judge, P.G.: An instrument to measure coronal emission line polarization. Solar Phys. 247(2), 411–428 (2008)

    Article  ADS  Google Scholar 

  19. Venkata, S., Budihal, R.P.: Light scattering due to particulate contamination over the primary mirror of Visible Emission Line Coronagraph onboard Aditya-L1 mission. Opt. Eng. 60(7), 1–15 (2021)

    Article  Google Scholar 

  20. Venkata, S., Budihal, R.P., Venkatasubramanian, N., Padavu, U.K., Sriraman, K.: Band-limited integrated scatter measurements on super polished optical mirrors. Opt. Eng. 59(8), 1–16 (2020)

    Article  Google Scholar 

  21. Venkata, S.N., Prasad, B.R., Nalla, R.K., Singh, J.: Scatter studies for visible emission line coronagraph on board aditya-l1 mission. J. Astron. Telescopes Instrum. Syst. 3 (2017)

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Authors and Affiliations

  1. Indian Institute of Astrophysics, II Block, Koramangala, 560034, Bangalore, India

    Suresh Venkata, Raghavendra Prasad B & Jagdev Singh

  2. PI – VELC-ADITYA L1, Indian Institute of Astrophysics, II Block, Koramangala, 560034, Bangalore, India

    Raghavendra Prasad B

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  1. Suresh Venkata
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  2. Raghavendra Prasad B
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  3. Jagdev Singh
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Correspondence to Suresh Venkata.

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Venkata, S., Prasad B, R. & Singh, J. Spectropolarimetry package for visible emission line coronagraph (VELC) on board Aditya-L1 mission. Exp Astron 53, 71–82 (2022). https://doi.org/10.1007/s10686-021-09816-7

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