[Chiba, Kasamatsu, Yokozawa, Ushiba]

We injected the OpLev lasers for MN OpLevs to the cryostat and successfully obtained the reflection light from the viewports when injection hits the center of the mirrors on MN.
Currently, a part of injection and reflection beams is clipped by electrical and suspension wires, so we need to move the beam slightly.

However, we don't know current mirror inclination is good interms of the interferometer alignment.
So, we will check the beam again after finely aligning the mirror by using green beam from the center room and if necessary, we will try that.

Detail of the work is supposed to be posted by Yokozawa-san later.