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KAGRA MIR (General)
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MarcEisenmann - 20:11, Tuesday 04 January 2022 (2777)Get code to link to this report
Start of SHINKOSHA 7 birefringence measurement

Abe, Marc and help from Yuhang to move safely the mirror

We removed the spare ETMY but did not placed it inside its box as we might put first contact before the shipping back to ICRR.

We checked the surface and bulk calibration without tuning the pump nor the probe beams alignment and got R_surface = 17.87 /W and R_bulk = 0.6503 cm/W

We measured the pump beam incidence angle and installed the SHINKOSHA 7 on the translation stage (X_center = 398 mm, Y_center = 122 mm and Z_center = 71 mm).

After the usual calibration we started the measurement with s polarization at the input.

Comments related to this report
MarcEisenmann - 17:07, Wednesday 05 January 2022 (2780)

Here is the result of the vertical and horizontal angles of incidence that will be used during the measurement :

vertical ; 4.75 mrad or 0.272 deg

horizontal ; 41.94 mrad or 2.403 deg