Advanced microcalorimeter arrays for next-generation x-ray missions

We will develop several technologies to enable significantly larger arrays of x-ray microcalorimeter sensors for future NASA missions such as the X-ray Surveyor. In particular, we will develop sensor fabrication and readout strategies compatible with arrays of 10^5 or more sensors. Our readout strategies rely, in part, on a novel switching element recently developed at NIST that has not previously been used with microcalorimeter sensors. Our work will enable in-focal plane multiplexing in which the sensors and readout circuitry are co-located. The scalability of this approach is highly favorable for large sensor arrays. We will also develop x-ray microcalorimeters using novel materials consisting of doped AlMn alloys. These materials allow precise control of the transition temperature over 150 mm wafer area. This wafer scale is necessary for arrays of 10^5 to 10^6 sensors.

The results of this project serve the needs for future “in situ life detection” missions such as are being conceived to interrogate the ocean worlds of the outer solar system (e.g. Titan and Europa). This technology addresses NASA's need to develop uniquely universal approaches to detecting lifeforms that may be considerably different from what is currently recognized as life.

This is early/mid-stage (TRL 4) — the most realistic path in is NASA SBIR/STTR, which funds small businesses and research institutions to develop technology aligned with NASA's needs (equity-free, phased funding). Check whether a current SBIR/STTR solicitation topic overlaps with this project's technology area, or contact the project directly (above) to ask.

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