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Full list of devices of May09

Full list of devices of May09. Wafer sensor n 15 2E1    08132 2E2    06142 2E3    06151 2E4    09131 3E5    09141 3E7    06152 3E9    10132 3E11   07152 4E6     10141 4E8     03141. WAFER SENSOR N 11 2E1    10142 2E17    08152 2E3     03142 2E4     04152 3E5      04141

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Full list of devices of May09

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  1. Full list of devices of May09 Wafer sensor n 15 2E1    08132 2E2    06142 2E3    06151 2E4    09131 3E5    09141 3E7    06152 3E9    10132 3E11   07152 4E6     10141 4E8     03141 • WAFER SENSOR N 11 • 2E1    10142 • 2E17    08152 • 2E3     03142 • 2E4     04152 • 3E5      04141 • 3E7      05151 • 3E9      04142 • 3E11     05152 • 4E6      05082 • 4E8     09071 In red the ones we loaded (see next) Wafer 11 characterized by having few pixels working randomly distributed. Wafer15 characterized by low breakdown voltage. Is it useful to load more, at least from wafer 15?

  2. Loaded devices

  3. Some more tests on the three devices of wafer 15 that we still have in Genova: • Repeat IV scan • Noise vs HV • Monleak scan • Xtalk (done but not understood yet) Noise, monleak and Xtalk only for two devices as one as the FE not working. IV curves for three devices of wafer 15. Vbd is ~10V.

  4. Wafer15: 3e11_07152 • Noise vs HV • Monleak

  5. 20 V The noise becomes higher, especially when two neighbouring pixels are injected at the same time. Increasing the voltage, the noisy area increases. 12 V At 10V the leakage voltage starts raising, few pixels starts becoming very noisy 10 V 8 V

  6. Noise distributions vs HV

  7. Monleak@8V 2D Noise map

  8. Monleak@10V Three pixels show an higher leakage current and their noise starts increasing (also for few neighbours)

  9. Monleak@16V The areas of noise increase around the noisy “pixel seeds’

  10. Wafer15: 3E9_10132 • Noise vs HV • Monleak

  11. Noise map vs HV 18 V 12 V Two areas are visible where the noise increases 10 V 8 V Many pixels are noisy already at low voltages

  12. Noise distributions vs HV

  13. Monleak@8V

  14. Monleak@18V

  15. Outlook • Wafer 15 have a low breakdown voltage. This seems correlated to few pixels that start drawing more current. It does not look as a coherent effect or due to cut problem. • Debug the FE not working • Load more? Is it useful to get more evidence? • Understand better the Xtalk results (not shown)

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