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M. Furlan I. Jerjen E. Kirk Ph. Lerch A. Zehnder

Cryogenic Detectors Development at PSI. M. Furlan I. Jerjen E. Kirk Ph. Lerch A. Zehnder. PSI Cryo-detector Work. SIS STJ Ta-STJ, Single pixel and strips Mn- X-Ray, Optical Caloriemeter MoAu TES, Mn-X-ray SIN STJ. PAUL SCHERRER INSTITUT. Si. Si-nitride. Mo/Au.

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M. Furlan I. Jerjen E. Kirk Ph. Lerch A. Zehnder

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  1. Cryogenic Detectors Development at PSI M. Furlan I. Jerjen E. Kirk Ph. Lerch A. Zehnder

  2. PSI Cryo-detector Work • SIS STJ • Ta-STJ, Single pixel and strips • Mn- X-Ray, Optical • Caloriemeter • MoAu TES, Mn-X-ray • SIN STJ

  3. PAUL SCHERRER INSTITUT Si Si-nitride Mo/Au • Mo/Au Microcalorimeter • Mo/Au-TES • Au Absorber • Si-nitride membrane, “bad” thermal link • Thesis J. Olsen.

  4. Basic tunneling junction Ta-Al/AlOx/Al-Ta-Nb produced by E. Kirk

  5. STJ Detector fabrication in cross section Photoresist etch mask, dry and wet etching to pattern strips … … and detectors … and wiring Lift-off mask for SiO2 …

  6. I-V characteristics

  7. Response to red LED

  8. VUV spectrometer 10 - 30 eV Ta-STJ 20’000 e/eV @ 300 mK IR rejection !

  9. imaging with diffusion

  10. 6.4 keV 5.9 keV energy position Substrate Phonons

  11. Summary Mn-X-ray results at PSI Si, 300 K STJ, 500 mK calorimeter, 100 mK

  12. Kurakados 40series x 20paralle STJ’s, each 50mm Diameter

  13. Future plans at PSI • Close SIS-STJ work in 2005 • Thesis I. Jerjen: Sensitivity of Ta-STJ to optical light • Measure 10-50eV photons • Collaboration with Kurakado on series-STJ fabrication and testing • SIN Junction studies • + S being Absorber, small gap • + N being Si (degenerated doped). • ++ Profit from Si technology • + No magnetic fields • - no backtunneling • - low temperature (<100mK)

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