[Takahashi, Sato, Ikeda + Tomaru, Ushiba]
We set the height of ITMX for some kinds of situations.
- In-air: Set the height of keystone to +2mm for F0, +1.5mm for F1, +0.5mm for BF respectively. The height of BF was 76/78/78.5mm. Then measured height of the TM was +2mm from the optical axis.
- Cryogenic: Set the height of keystone to -3.5mm for F0, -0.5mm for F1, +/-0mm for BF respectively. The heigh of BF was 65.5/67/67mm. Additionally the height of F0 keystone went down to -5.5mm with small ballast. Then measured heigh of the TM was -11.5mm from the optical axis.
- Preparation for piston adjustment: Set the height of keystone to -3.5mm for F0, -0.5mm for F1, +1.5mm for BF respectively.
