Reports until 14:48, Friday 22 March 2019
H1 SUS
rahul.kumar@LIGO.ORG - posted 14:48, Friday 22 March 2019 (47771)
medm update for violin mode monitor

I (along with active input from Jenne) have been working on updating the medm for the violin mode monitor, which is now fully functional. You can access it from the sitemap - SUS - VIOLINS. The attached screenshot  shows the new layout. Given below are the list of improvements/additions over the old monitor.  

1. The new medm now accommodates the list of 1st (fundamental) and 2nd harmonics for the violin modes, in total 16 modes plus few unknowns, along with damping filters (BANK1 and BANK2) and monitor filters.

2. The mode frequency values have been updated, at least for the ones which has been correctly identified. There are currently 3 unidentified modes for the 1st harmonic. The unidentified ones are marked in red font (in the medm).

3. The new bar chart represents the excitation values, which is colour sensitive (green for low excitation and red for high). One can also find the mode no, freq, peak excitation values, which is listed on the window.

4. ndscopes - Now available for 1st and 2nd harmonics (including Drives, Monitors, ETMs or ITMs). The ndscopes have also been cleaned up (or refreshed) - with some old (ghost) ones removed.

 

Images attached to this report