Abstract:
A high voltage feedthrough assembly (100) for providing an electric potential in a vacuum environment comprises a flange connector (10) being adapted for a connection with a vacuum vessel (201), wherein the flange connector (10) has an inner side (11) facing to the vacuum vessel (201) and an outer side (12) facing to an environment of the vacuum vessel 201, a vacuumtight insulator tube (20) having a longitudinal extension with a first end (21) facing to the flange connector (10) and a second end (22) being adapted for projecting into the vacuum vessel (201), and an electrode device (30) coupled to the second end (22) of the insulator tube (20), wherein the electrode device (30) has a front electrode (31), including a photocathode or a field emitter tip and facing to the vacuum vessel (201) and a cable adapter (32) for receiving a high-voltage cable (214), wherein a flexible tube connector (40) is provided for a vacuum-tight coupling of the insulator tube (20) with the flange connector (10), and a manipulator device (50) is connected with the insulator tube (20) for adjusting a geometrical arrangement of the insulator tube (20) relative to the flange connector (10). Furthermore, an electron diffraction or imaging apparatus (transmission electron microscope, TEM) 200 for static and/or time-resolved diffraction, including (nano-) crystallography, and real space imaging for structural investigations including the high voltage feedthrough assembly (100) and a method of manipulating an electrode device (30) in a vacuum environment are described.