TMS-VIS-Y: preparation in Mitaka

• TMS = BRT (beam reducing telescope) + GPT (Gouy phase telescope)

Links to knowledge

• The previous preparation of TMS-VIS (for Xend)

• Standalone Machine in ATC

• Mechanical design: Mechanical design of TMS Vibration Isolation Stage (by Uraguchi-san)

• Ref: design of blade spring for TMS VIS stage (in Japanese) (by Uraguchi-san)

• Ref: mechanical model of TMS VIS (in Japanese) (by Uraguchi-san)

• Ref: TMS VIS coordinate (in Japanese) (by Uraguchi-san)

• Ref: SR Suspension Diagonalization Matrices (by Mark)

• Ref: A Study of Low Frequency Vibration Isolation System for Large Scale Gravitational Wave Detectors (by Sekiguchi)

LVDTs

Polarity & Calibration Factor

• V: postive means that the LVDT outputs positive counts when TMS-VIS moves upward, and so the calibration factors are set.
• H: postive means that the LVDT outputs positive counts when TMS-VIS moves positive yaw (counter clock wise from top view), and so the calibration factors are set.

Actuator coils

Be careful! The pin assignment in the Dsub shell or the signal phases would be different from the below, as I needed to once detach the pins when I installed the coils (Akutsu). Note that newly four actuator coils have been made for TMS-VISY after JGW-T1800846.

• Coil inspection report (JGW-T1808465)

• [[]]
• Tanioka-kun's efforts in 2019

Polarity & Calibration Factor

• V: postive means upward (TMS-VIS moves in upward by inputting positive value to the act coils from MEDM)
• H: positive means plus yaw (TMS-VIS moves in counter clock wise from top view by inputting positive value to the act coils from MEDM)

Geophones

• Data sheets of the geophones (JGW-T1808466)

• http://klog.icrr.u-tokyo.ac.jp/osl/?r=5024

Cabling

• LVDT/Act - (coil wires) - Dsub9M - (Dsub9F - PTFE 2m - Dsub9F) - Dsub9M flange - Flipper cable - Dsub Cable
• Geophone - (MIL C 26482 - PTFE 0.5m - Dsub9M) - (Dsub9F - 1.5m PTFE - Dsub9F) - Dsub9M flange - Flipper cable - Dsub Cable

• PTFE cables

Task list