60cm Solar 9Channel Telescope
This telescope is a vacuum Gregorian reflector equipped with the unique Multi-Channel Filter and can simultaneously obtain 5 monochromatic images, vector magnetic field and velocity field by measuring 5 spectral lines produced at various altitudes of solar atmosphere. The selected 9 spectral lines are CaII3968Å , HeII4686Å , MgI5173Å , FeI5247Å , 5250Å , 5576Å , 6302Å , HeI5876Å and H6563Å. Due to the tunable filter, others spectral lines can be selected and the profiles of spectral lines can be scanned. Theoretically the system can simultaneously measure 6 spectral lines, except He4686Å , 5876Å and FeI5576Å , to obtain solar magnetic field. A 2-Channel system is under developing for the high resolution measurement of the structures of magnetic pores with speckle interference method. And magnetograms with resolution of 0.5 arc sec will be expected.
- Primary mirror
- Diameter 600mm, F-ratio=F/2.5
- Secondary mirror
- Diameter 154mm
- Effective Focal Length
- 6000m (with Multi-Channel Filter), 12000mm (without filter)
- Field Of View
- 5' x 4'
- CCD
- nine 1820 CCDs
pixel size 10µ m × 11µ m, 0.35" x 0.38"
- Sensitivity
- ± 1gauss for longitudinal filed
± 50 gauss for transverse field
- Temporal Resolution
- 0.5 ~ 10 min
- Spectral Resolution
- 0.05Å
- Multi-Channel Filter
- 9 channels
each of the channels is universally tunable
- Bandwidth
- 0.092Å at 5173.699Å
0.048Å at 5247.063Å
0.048Å at 5250.211Å
0.462Å at 4686.750Å
0.092Å at 6302.511Å
0.057Å at 5576.106Å
2.424Å at 3968.468Å
0.079Å at 5875.989Å
0.106Å at 6562.808Å
- For more information contact
- G.X. Ai, H.Q. Zhang, Y.Y. Deng, W. Li, D.G. Wang, K.L. Hu
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