Screening device in a cryostat for a superconductive magnetometer apparatus

摘要

The RF screening device is constructed in a Dewar vessel (2) outside its internal space (5) as all round RF-tight sheathing around the superconductive parts (10) of a measuring device, RF screening also being provided for the cross section of the Dewar neck (6). Furthermore, the RF screening device (9) is used at the same time as thermal radiation shield, its areas surrounding the superconductive parts (10) being kept at an intermediate temperature level. In addition, the areas (9a, 9b) of the RF screening device (9) are divided into individual electrically conductive, mutually insulated conductor tracks at least in the area of the superconductive parts (10) in order to suppress eddy currents. …IMAGE…