NAOJ GW Elog Logbook 3.2
Displaying report 1-1 of 1.
RaffaeleFlaminio - 16:11, Thursday 13 April 2017 (450)
Position of stack in NM2 ?
Today I tried to evaluate how far is the center of the NM2 stack from the tube axis.
I define as the tube axis the axis defined by the window on the valve between the NM2 chamber and the
tube and first target in the tube. So I placed an He-Ne beam on that axis.
I doubt to be able to defined that axis to better than 0.5 cm in position and 1 cm over ~10 m in angle.
This axis intercepts the stack in the NM1 22.2 cm in height and 1.8 cm to the west.
I estimate that I have about 1 cm error on this numbers.
I define as the tube axis the axis defined by the window on the valve between the NM2 chamber and the
tube and first target in the tube. So I placed an He-Ne beam on that axis.
I doubt to be able to defined that axis to better than 0.5 cm in position and 1 cm over ~10 m in angle.
This axis intercepts the stack in the NM1 22.2 cm in height and 1.8 cm to the west.
I estimate that I have about 1 cm error on this numbers.
trying to have it better centered on the valve's window.
The height respect to the stack doesn't change. The lateral position is now 1.4 cm
west.
the He-Ne laser beam goes through the input mirror. Also in this case I centered the He-Ne laser beam
on the the first target in the tube and on the window at the entrance of the tube.
In order to do so the injection point from the back of the suspension is 21.8 cm in height and 2.4 cm
to the west.