Although the existing BBSO VMG system is capable of providing the most sensitive magnetogram, further improvements to the magnetograph system are planned to obtain even better data to support SOHO quiet Sun Observations. We are developing a digital magnetograph system to substitute the current video magnetograph system. The optical disk stores images in analog form, but its serial port allows us to have computer control and grab every image easily. There are several instruments on board SOHO for studying the solar chromospheric and coronal phenomena. When the Si IV line is selected, several O IV lines near 1400A will be observed, from their line ratios, we expect to study electron density of jets.
Data analyses are in progress.
Hopefully, this run will help us to plan future observations. With these high resolution images, we are especially interested in studying the morphology and evolution of sites which produce jets continuously. Jets may convert part of their kinetic energies to thermal energies to produce emission at different temperatures. These images will also help us to understand the small scale loop structure in the quiet Sun, and their role in producing jets and bright points. CDS observations will provide further diagnoses of these jets if they are indeed heated to the higher coronal temperature.