Development of STJ as a New X-Ray Detector
Abstract
Current status of development of STJ (superconducting tunnel junction) as a new X-ray detector are reported. STJs are promising as high energy resolution spectrometers due to the low excitation energy to break the Cooper pairs to product detectable electrons in superconducting layers. The expected energy resolution is about 5 eV for a 6 keV incident X-rays. As position sensitive detectors, series- connected STJs have been developed, A position resolution of 35um by alpha particles is obtained. We made up a measurement system for STJs with an X-ray generator attached to a cryostat to be cooled to 0.35 K. Using this system, we succeed to detect X-ray signals from both single and series-connected STJs. The linearity of the energy scale and new position detection technique will be discussed.
- Publication:
-
The Hot Universe
- Pub Date:
- 1998
- Bibcode:
- 1998IAUS..188..335Y