The last flange contains a viescreen. It is observed by a video camera.
The electron beam must be adjusted by 14 (!) steering coil pairs. We found the beam very fast: this was good luck!
Steering currents are set by the computer via LabView. Note the professional stand for the video screen.
Direct view to the electron beam spot.
The filament is on 2 kV, adjusted by another computer.
Wirering of the filament and electron focusing lens.
Cave 111b is stll devided in two parts. here the lower one ...
... and here the upper one. The crane is just being installed.
Next step is to built in the apertures for the beam, to make sure that the beam is really in the middle.
... another view of the aperture. In consists of two layers for better vacuum pumping.