The shift was dedicated to WEB. We injected with the small coil in these locations:

• WE tower base (North-East corner)
• same X,Z position, Y position at about  beam level
• same X,Z position, Y position on scaffolding first level
• in front of SAT rack, Y position is between Sc and Sa crates

in each location we repeated the injection for 3 coil axis orientation: EW, NS and VERT. We injected a sweep 8-330 Hz, 5V and 600s.

During all injections the MICH, SRCL and PRCL lines (respectively at 21.7 Hz, 26.6 Hz and 64.4 Hz) were switched off (Thanks to Diego, Manuel, Piernicola, and Francesco Berni!)

We installed one fluxgate magnetometer at the WE tower base, North-East corner, same X,Z position and beam height: ENV_WE_MAG_N,W,V

Far field magnetic injection in the CEB:

• we injected a sweep 8 - 500 Hz, 9 V and 1800s duration

Times and details are in the attached log file.

Note: after the lines switch off the hrec spectrum was much cleaner in the 20-40Hz range. We noticed a sort of recurring change in the noise floor between 20 and 40 Hz, as can be seen in the attached plot.