KAGRA MIR (General)
MarcEisenmann - 18:58, Thursday 05 August 2021 (2653)
cleaning of PCI and surface reference sample measurements

Katsuki-san, Marc

We placed the ETMY jigs, jacks and metal/teflon rings inside a plastic box.

We used goro-goro to clean the floor and optical bench.

We moved several samples on the small table below the small clean booth.

We tidy up many cables and removed a malfunctioning usb hub. Now we don't have any more connections troubles with polarizers or powermeter.

We reinstalled the imaging unit (z_IU=68mm) and started to check the calibration factor with the surface reference sample.

We found that the maximum is with the translation stage at Z = 40.2 mm : R_surf = 16.6 /W.

We took several measurements between Z = 38.5 mm to 41.5 mm. The goal of these measurements is to find this Z position but also to be used later on to check if the lateral peaks could be useful to perform quicker alignment (to be compare with OSCAR simulations).

The next step is to scan the IU position.

We also brought the SHINKOSHA evaluation plate #7 to the storage room.