| Instrument | |
| Instrument Name: | POL3 |
| Telescope: | THEMIS |
| Telescope Aperture: | 90 |
| Telescope Port: | Cassegrain |
| Status: | Operational |
| Commissioning Date: | 2011 |
| Polarimetry: | |
| Polarimetry Type: | Spectropolarimetry Full-Stokes |
| Stokes Parameters: | I Q U V |
| Wavelength Range: | |
| Modulator Type: | LCVR |
| Modulator Type Other: | |
| Modulation Frequency: | 20Hz |
| Analyzer Type: | Calcite modified-Savart |
| Analyzer Type Other: | |
| Sensitivity: | >10^-5 |
| Accuracy Zero Point: | |
| Accuracy Scaling: | |
| Imaging: | No |
| Wavelength Range: | |
| Field of View: | |
| Resolution: | |
| Pixel Scale: | |
| Pixel Dimensions: | |
| Sensor Type: | |
| Limiting Magnitude: | |
| Coronograph: | |
| Coronograph Type: | |
| Coronograph IWA: | |
| Adaptive Optics: | No |
| DM, Number of Actuators: | |
| DM Type: | |
| WFS Type: | |
| WFS Update frequency: | |
| Strehl: | |
| Limiting Magnitude: | |
| Spectroscopy: | Yes |
| Sampling: | 0.011 |
| Wavelength Range: | 4500-13000 |
| Spectral Resolution: | 300000 |
| Limiting Magnitude: | |
| Instrument Image: | 513df1f29f6b1-POL3.jpg |
| Instrument Image Caption: | POL3 Cassegrain pacakage. Labels refer to the modification and its readiness for an upgrade |
| Instrument Reference Paper: | |
| Known Issues: | |
| Instrument Contact: | A. López Ariste |
| Instrument Website: | www.themis.iac.es |
| Planned Upgrades: | Beamsplitter is planned to move to a science focus in the future. The Cassegrain package will then be modified to transform input polarisation into telescope eigenmodes. |
| Science | |
| Science Description: | Solar Spectropolarimetry. Measurement of magnetic fields in the solar photosphere, chromosphere and prominences. Spectropolarimetry of Mercury's exosphere |
| Target Types: | Sun. Planets |
| Sample Image/Result: | 513df1f2a048c-LHS.29jun07.both.jpg |
| Sample image Caption: | Simultaneous spectropolarimetry of the He lines D3 (5876A) and 10830A in solar prominences. The polarization is sensitive to Zeeman and Hanle effects. It allows diagnostics of magnetic fields in solar prominences. |
| Sample Science Papers: | |
| Remarks: | |