1 / 13

The Coronal Solar Magnetism Observatory (COSMO)

The Coronal Solar Magnetism Observatory (COSMO). Motivation. Our Vulnerability to Space Weather is Increasing Manned Space Flight Power Grids Communications GPS Navigation. COSMO Goals.

nero
Download Presentation

The Coronal Solar Magnetism Observatory (COSMO)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The Coronal Solar Magnetism Observatory(COSMO)

  2. Motivation Our Vulnerability to Space Weather is Increasing • Manned Space Flight • Power Grids • Communications • GPS Navigation

  3. COSMO Goals • In response to society’s need to reduce our vulnerability to Space Weather, the goals of COSMO are to: • Understand processes that lead to solar eruptions • Support development of predictive capability • Monitor real-time eruptive events • Estimate event geo-effectiveness

  4. Requirements Solar activity is Magnetically Driven Progress requires measurement of: Strength and direction of magnetic fields in the Solar Corona, Chromosphere and Photosphere Plasma properties Velocity, Temperature, Density Need Systems Approach LASCO

  5. COSMO • COSMO is a proposed facility dedicated to studying solar magnetic fields and their role in driving solar activity such as coronal mass ejections Synoptically. It comprises: • 1.5 m Aperture Coronagraph (Corona) • Disk Imager / Polarimeter - ChroMag (Chromosphere/Photosphere) • K-coronagraph (CME) 1.5-m coronagraph pictured here

  6. K-Coronagraph • Measures coronal structure and evolution • Observes Coronal Mass Ejections in real-time • Observes shocks which produce energetic particles • Fully funded ($2.2M, NSF special), construction nearly complete, deployment to MLSO late Summer

  7. Chromosphere and Prominence Magnetometer (ChroMag) ChroMag will make complete-Stokes observations of the entire solar disk at high temporal cadence in many spectral lines (587 - 1083 nm) that can be used to accurately infer the magnetic field and other plasma parameters from the photosphere through the chromosphere.

  8. ChroMag - Tunable Filter

  9. COSMO Large Coronagraph 1.5 m refractive coronagraph 1º field-of-view Low scattered light Synoptic operation Will obtain measurements of Coronal B with 1 Gauss precision in 10 minutes, 5 arcsecond spatial resolution Would be largest refractive telescope in the world, $20M

  10. COSMO LC Design Drivers • Large aperture • Need to collect photons (V/I ~ 10-4 / Gauss) • Low scattered light • Lens better than mirror (microroughness and dust) • High efficiency - no reflections • ATST 10, EST 14 reflections before coude instruments • Symmetrical on-axis optical system - Makes polarimetry easier • Large Field-of-View - Coronal structures are large - aberrations are easier to control with a lens than a mirror • Pressurized Dome Design • HEPA filtering - maintain cleanliness

  11. Large Synoptic Survey Telescope LSST has unique combination of aperture and FOV  Étendue light collecting power = collecting area x solid angle FOV = 319 m2 deg2 LSST will have a 1.6 m diameter lens and a 1.1 m lens!

  12. COSMO is Highly Complementary ATST FOV Sun COSMO FOV Most existing and planned solar telescopes have small FOV, will observe at high spatial resolution and are not synoptic. The COSMO coronagraph will have a light gathering power (étendue) that exceeds that of the ATST by a factor of 15. Sun Offset Mode

  13. COSMO LC Status • COSMO Large Coronagraph Conceptual Design, Feasibility Study Complete • COSMO Now an International Project • US/China Collaboration on Design Development • Preliminary Design Review – Feb 2014 • Submit Proposals to Chinese and US Agencies for Construction of 2 Large Coronagraphs • COSMO Endorsed by 2012 Heliophysics Decadal Survey

More Related