The Building of DTU Cen 314

DTU Cen 314, the microscope building is a specifically designed building which was established for our electron microscopes. Due to the sensitive nature of the microscopes, three major factors needed to be taken into account when the building was designed. These were ground vibrations, temperature variations and magnetic fields. Ground vibrations and acoustic vibrations of all frequencies were factors in the design of building 314 because of the high magnifications used in electron nanoscopy research. The foundation had to be a meter thick and the rooms vibrationally isolated with both wall and ceiling isolations. Magnetic fields which can be induced by the surrounding power lines were tested and found to be less than 20 nT. Temperature variations, which can also affect electron beam stability, must be constant with less than 0.5 Celsius variation over 30 minutes.