摘要:
The invention relates to a transfer mechanism for transferring a specimen (2) from a first position in a first holder ( 40 ) to a second position in a second holder ( 10 ) and/or vice versa, each holder ( 10 , 40 ) equipped to detachably hold the specimen, the transfer of the specimen between the holders taking place in a transfer position different from the second position, characterized in that when the specimen is transferred between the holders ( 10 , 40 ) a mechanical guidance mechanism positions the holders with a mutual accuracy higher than the mutual accuracy in the second position, and said mechanical guidance mechanism not positioning at least one of the holders ( 10 , 40 ) when the specimen is in the second position. The mechanical guidance mechanism may comprise extra parts ( 50 ). At least one of the holders ( 40 ) may be equipped to hold a multitude of specimens.
摘要:
The invention relates to a thermal switch for particle-optical apparatus. In, for example, a cryo-TEM (transmission electron microscope), a sample 34 that is placed at an extremity 20 of a sample holder 7 can be maintained at, for example, the temperature of liquid nitrogen. There is a need to be able to inspect a sample at, for example, room temperature in a simple manner, without heating the microscope as a whole from the cryogenic temperature to room temperature. By using the thermal switch 40, this becomes possible. To this end, the thermal switch changes the thermal path between a cold source 22 in the apparatus and the extremity 20 of the sample holder 7, whereby, in one position, position 46 a , a connection is made from the extremity 20 to the cold source 22, and, in the other position, position 46 b , a connection is made to a portion 44 of the apparatus that is maintained at room temperature.