[Takahashi, Sato]

• The LVDT driver for BF damper was replaced to S1807785 which was modified on the grounding. We calibrated the LVDTs. The horizontal positions were measured as the gap between the right secondary coil and the primary coil. The vertical positions were measured as the gap between the lower secondary coil and the primary coil (plots).
• Checked cable connections (resistance, inductance, etc) at the feedthroughs.
• Checked polarity of magnets in the IP/TF actuator. The center yoke was N.
• Checked polarity of magnets in the BF damper (picture).