iKAGRA ETM suspension preparation log
original schedule
- 12th Jan- (2 weeks) Disassembling, Washing, and transportation
- 25th Jan - (2 weeks) Assembling and Test Hanging with dummy mirror
- 7th Feb- (1 week) coil winding, measurement of transfer function, transportation to the End area and installation test
- 15th Feb- (1 week)installation
Disassembling at Mitaka [Ohishi]
- status: finished. (12th-19th)
- [problem]
- 2 nuts stuck: solved by Hirata-san
- A Cu screw stuck: solved by Hirata-san
Washing and transportation to Kamioka [Hirata-san]
- [problem]
- ultra sonic washer broken 20th ordered on 22th(Fri) will be arrive at Mitaka on 26th(Tue)
- 8 screws for adjusting the IM holding plate was dirty
- Solution: order new screws (by Takahashi-san)
New parts
- coil bobbin [Takahashi-san]
- coil winding [students of Ando-lab] [problem] coil wires from the bobbin to Dsub connector were too short(20cm). The length of Must be 40cm or more. At the end of coil wires, D-sub pins are swaged. We have run short of pins and waiting for delivery on 29th. [problem ]Peeling off the coating of wires longer than the length of those pins make the wire broken easily.
- D-sub fixture plates [Takahashi-san] [problem] M3 holes were drilled to phi3.2 holes.
- mirror container [Tatsumi-san] [problem]
- magnets for dummy mirror (4 ; 2-phi-L-5mm Nd magnets) [Tomaru, Yamamoto] []
- some screws in replace with Cu screws [Ohishi] [problem] replaced all Cu screws to stainless. Magnetism problem was indicated.
pico-motors and PZTs
- We have 4 pico-motors except for x-axis (the direction of the light ) y, z, pitch, yaw
coil driver
- We use KAGRA coil driver; we need to cheek its performance.
cables
Assembling [Tomaru, Ohishi, Yamamoto]
- On 21th, suspension frame, security frame, xy stages completed
Hanging
Transfer Function Measurement
Transportation to the End
Installation
