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| Paper: |
Construction of the Advanced Technology Solar Telescope |
| Volume: |
463, 2nd ATST-EAST Workshop in Solar Physics: Magnetic Fields from the Photosphere to the Corona |
| Page: |
377 |
| Authors: |
Rimmele, T. R.; Keil, S.; McMullin, J.; Knölker, M.; Kuhn, J. R.; Goode, P. R.; Rosner, R.; Casini, R.; Lin, H.; Tritschler, A.; Wöger, F.; ATST Team |
| Abstract: |
The 4m Advance Technology Solar Telescope (ATST) will be the most
powerful solar telescope and the world's leading ground-based resource
for studying solar magnetism that controls the solar wind, flares,
coronal mass ejections and variability in the Sun's output. The
project has entered its construction phase. Major subsystems have been
contracted. As its highest priority science driver ATST shall provide
high resolution and high sensitivity observations of the dynamic solar
magnetic fields throughout the solar atmosphere, including the corona
at infrared wavelengths. With its 4m aperture, ATST will resolve
features at 0.″03 at visible wavelengths and obtain 0.″1 resolution at
the magnetically highly sensitive near infrared wavelengths. A high
order adaptive optics system delivers a corrected beam to the initial
set of state-of-the-art, facility class instrumentation located in the
Coudé laboratory facility. The initial set of first generation
instruments consists of five facility class instruments, including
imagers and spectro-polarimeters. The high polarimetric sensitivity
and accuracy required for measurements of the illusive solar magnetic
fields place strong constraints on the polarization analysis and
calibration. Development and construction of a four-meter solar
telescope presents many technical challenges, including thermal
control of the enclosure, telescope structure and optics and wavefront
control. A brief overview of the science goals and observational
requirements of the ATST will be given, followed by a summary of the
design status of the telescope and its instrumentation, including
design status of major subsystems, such as the telescope mount
assembly, enclosure, mirror assemblies, and wavefront correction |
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