[Sem] Mike wants to teach us how to align the SEM - Microscope was touched by others and possibly buggered up.

[Ian Atha]

fwding to SEM@ since it's of general interest.

On Mon, Apr 12, 2010 at 16:40, Michael Kan Kan <michaelkan_kan at yahoo.com> wrote:
>  Andy had announced to have a microscope session on Saturday but it was
> very rainy and [... Andy] decided to have another
> go at having another session on the following Sunday which no one showed
> up.
>
> [...]
>
>
>  [...] opened up the cathode block from the microscope
> to look and we have to align the cathode again. Fortunately the alignment
> kit had been built up from the last time so we can do it again.
>
>
>  There was found earlier that the neutral stack setting was not so perfect
> and the roughing and backing line had oil sucked back towards the stack
> valve manifold. Hopefully there was no roughing pump oil into the
> diffusion pump as valving was set to neutral.
>  Apprently one of the backing or roughing valve positions were not so
> perfect that we vented the backing hose, the chamber and the rest of the
> system drew the oil afterwards.
>  We should vent the whole system till the roughing and or backing valve
> positions are checked out for leaks.
>
>
>  There is still the need to have a digital camera mounting rack or shelf
> and hood built for the actual use of the instrument.
>
>  There is a air filter fan that needss to be rebuilt so as to create a
> clean low dust air around the microscope.
>
>  A clean room or box needs to be established around the instrument.
>
>
> [...]
>
>
>  Take care
>
>
>  Mike Kan
>