Issues in this category are such that they affect the essential functionality of the instrument.

• AFM is not working. RHK staff has maintained there is some issue with the optics, first the laser amplifier was not working and then it was the photodiode. The photodiode was troubleshoot in the end of February 2012 and was indeed disconnected in at least one quadrant. Bert has been notified about this and it should be rectified during the March revolution.
• LEED is not working. The manuals procedure for starting the LEED was followed and the current readout did not show any current. The filament was removed and seems OK, so other troubleshooting ideas have to be explored. VACGEN has been contacted for suggestions. The power supply will be given to the ELD in the first week of March 16.
• Calibrate and document the load lock pressure gauge pump down time. See below. Can only be done after the instrument is baked and pumped down again.

• Pressure gauge for load lock is not functioning properly. The symptom is that the gauge cannot show the lowest range of pressures, so when pumping down the pressure goes down but the gauge stops showing the proper value at a much higher pressure than the range of the gauge. The workaround for now, is simply pumping the load-lock for while longer when the gauge stops moving. How long a while is still needs to be calibrated and documented. Bert has been notified and hopefully this will also be adressed.

The electrodes on some of the parking spots for the evaporation (top parking in the prep chamber) does not work.