1. Radiation Detection via Transition Edge Sensor (TES)
Matthew Yankowitz
April 26, 2013

2. Overview
Goal: measure incident photon energy and time of arrival with high accuracy.
Method: Bias superconductor to transition temperature and measure change in resistance due to Joule heating of incident radiation.

3. Detector Geometry

4. Detector Geometry

5. Detector Geometry

6. Cryogenic Setup

7. Detector Geometry

8. Electrothermal Feedback
PJoule = V2/R
dR/dT > 0

9. Electronics Schematic

10. SQUID

11. TES Signal Pulse

12. Energy Determination

13. Electrothermal Feedback

14. Energy Determination

15. Conclusions Benefits: High efficiency photon detection.
Virtually no “false positive” counts.
Good energy resolution (order 0.1eV).
Accurate time-of-arrival.
Drawbacks:
Need to cool cryogenically below LHe.
Long dead time.