JEOL JSM 6301 SEM

- It was upgraded 5 years ago to Windows control, now running under Windows 10.

- There is a thin water cooling line, protecting the lower part of the column while baking the gun at the top, which is almost clogged since it is so old.  So when the emitter dies, it is all over. The extraction voltage is now around 6kV, close to the upper limit.