Cryogenic sensors, SQUIDs, multiplexing devices, applications of superconductors, imaging techniques, thermometry, calibration

In order to develop cryogenic electronics, factors such as compactness, accuracy, noise reduction, user-friendliness, value for money, and modularity have to be considered. Minimising heat input via the supply cables is also particularly crucial, which is achieved, e.g., through the use of multiplexers.

The development of cryogenic electronics at ILK Dresden includes, particularly, universal measurement bridges for any discrete electronic sensors. As base for this purpose, various electronic multifunctional modules and cold multiplexers have been developed, realised and evaluated. The multifunctional modules are distinguished by the feature that an universal design of the printed circuit boards enables to connect arbitrary discrete electronic sensors. The assemblies are chosen modularly. Thus, on demand, certain devices can be tested.

Furthermore, a software has been developed which serves as a universal platform for discrete configurations of modules. Such modules can originate from both, commercially available products and own hardware developments. Each control supports a definable number of sensors, actuators, modulators, and binary inputs/outputs. Each sensor, actuator, and modulator may represent established physical dimensions as, e.g., temperature, pressure, fluid level, voltage, current, or resistance.

A further important development is a 4-quadrant power supply for the ranges of ±14 kA und ±25 V which features very short response times. Its main application is the energy-recuperating operation and the test of superconducting magnets which, especially, are employed for continuous ramped particle colliders or in the field of nuclear fusion.

For superconducting systems, intelligent quench detection systems and quench prevention solutions have been developed. They can be based on high- or on low-temperature superconductors and are enabling a functionality which is adapted to both, the geometrical constraints and the required protection level.

The know-how gained from the issues described above can be employed for the development of specific devices as well as a base of customer-specific a system architecture.