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A scalable cryogenic LED module for selectively illuminating kinetic inductance detector arrays
J E Shroyer1, M Nelson1, L Walters1
1Department of Astronomy, University of Virginia, Charlottesville, Virginia 22904, USA.
The Review of Scientific Instruments
|December 3, 2022
Summary
We developed a novel, scalable LED module for mapping kinetic inductance detector arrays. This multiplexing system efficiently controls 480 LEDs with only seven wires, operating at cryogenic temperatures.
Area of Science:
- Physics
- Electrical Engineering
- Cryogenics
Background:
- Kinetic inductance detectors (KIDs) require precise spatial mapping for optimal performance.
- Existing methods for illuminating KID arrays can be complex and require extensive wiring.
Purpose of the Study:
- To design and characterize a novel light-emitting diode (LED) module for spatially mapping KID arrays.
- To develop a multiplexing scheme that minimizes wiring complexity and allows for scalability.
Main Methods:
- A multiplexing circuit was designed using active surface mount components capable of cryogenic operation.
- The LED module was tested at cryogenic temperatures (77 K and 10 K) in liquid nitrogen and a cryostat.
- Performance was measured for a module controlling 480 red LEDs.
Main Results:
- The multiplexing scheme successfully controlled 480 red LEDs using only seven wires.
- The circuit demonstrated reliable operation at cryogenic temperatures down to 10 K.
- The LED module's performance was validated through cryogenic testing.
Conclusions:
- A highly efficient and scalable LED module for KID array mapping has been demonstrated.
- The novel multiplexing approach significantly reduces wiring requirements for cryogenic detector systems.
- This technology is adaptable for various KID-based detector applications.
