| Autor: |
Melville P. Ulmer, Christopher D. Thomas, S. Lomatch, M. A. Chieda, Jun Chen, S. R. Maglic, E. D. Rippert, John B Ketterson, S. N. Song |
| Rok vydání: |
1994 |
| Předmět: |
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| Zdroj: |
Remote Sensing Reviews. 8:227-234 |
| ISSN: |
0275-7257 |
| DOI: |
10.1080/02757259309532198 |
| Popis: |
Superconducting tunnel junction X‐ray detectors have potential theoretical energy resolutions on the order of eV's. Such high energy resolutions would be of great use for astrophysical observations in the discrimination of spectral lines in hot plasmas and the determination of the Doppler shifts of these lines. Current results for these devices, however, yield energy resolutions more than an order of magnitude worse than the theoretical limit. In addition, low efficiency and breakdown under thermal cycling are also common problems. We propose a new approach based on multiple (10's to 100's) layers of vertically stacked tunnel junctions. This approach holds promise for the alleviation of many of the mechanisms that have been suggested as leading to the degradation of energy resolution and providing built in redundancy against barrier shorts. It should also be possible to make use of different materials which would yield higher operating temperatures and more robust devices. Also, the artificial 1‐... |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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