Measurements of vertical distances between wire and cathode 02/12/2003
In order to find all possible causes of the bad functioning of the LST studied before
(for more details see mapping of
profile 1,
profile 2 and
the pictures of open profile.),
here we show the vertical distances between wire and cathode measured with an optical microscope (50x).
Moving the microscope we focus before the wire and after the cathode, this distance is the distance between wire
and cathode. We have measured these distances about every 5 cm along the cell for the wire 3 (where there is
a lot of dust) of the HR profile 1. In following plots we report the performed measurements.
The errors on the measurement of the height to focus the wire is about 0.005 mm.
The errors on the measurement of the height to focus the grafite is about 0.005 mm.
Than the errors on the distance between wire and grafite is 0.01 mm.
In following plot we used an overestimated errors for the distances of 0.05 mm.
These measurements has been performed with the second layer below that measured.
Profile 1
From above plot we conclude that the distances between wire and cathode along the cell are very different.