1. Bias Ring Current Carl Goodrich 2/26/08

2. Carl Goodrich- VELO Meeting2 Sensor: 2552-10 Measurement: IV Data from December V bias Ground

3. 2/26/08Carl Goodrich- VELO Meeting3 Sensor: 2552-10 Measurement: IV Data from February Ground V bias

4. 2/26/08Carl Goodrich- VELO Meeting4 Sensor: 2552-10 Measurement: IIV V bias Ground Total Current: Bias Ring + Guard Ring Data from January

5. 2/26/08Carl Goodrich- VELO Meeting5 Sensor: 2552-14 Measurement: IV Data from December V bias Ground

6. 2/26/08Carl Goodrich- VELO Meeting6 Sensor: 2552-14 Measurement: IV Data from February Ground V bias

7. 2/26/08Carl Goodrich- VELO Meeting7 Sensor: 2552-14 Measurement: IIV V bias Ground Total Current: Bias Ring + Guard Ring Data from January

8. 2/26/08Carl Goodrich- VELO Meeting8 Data from December Sensor: 2552-11 Measurement: IV V bias Ground

9. 2/26/08Carl Goodrich- VELO Meeting9 Sensor: 2552-11 Measurement: IV Data from February V bias Ground

10. 2/26/08Carl Goodrich- VELO Meeting10 Sensor: 2552-11 Measurement: IV Data from February Ground V bias

11. 2/26/08Carl Goodrich- VELO Meeting11 Sensor: 2552-11 Measurement: IIV V bias Ground Total Current: Bias Ring + Guard Ring Data from January

12. 2/26/08Carl Goodrich- VELO Meeting12 Sensor: 2535-8 Measurement: IV Data from December Humidity = 1.1% Humidity = 8.3%, 9.4% V bias Ground

13. 2/26/08Carl Goodrich- VELO Meeting13 Sensor: 2535-8 Measurement: IV Humidity = 12.2% Humidity = 11.5%, 9.1% Data from February V bias Ground

14. 2/26/08Carl Goodrich- VELO Meeting14 Sensor: 2535-8 Measurement: IV Humidity = 9.4% Humidity = 12.6%, 8.3% Data from February Ground V bias

15. 2/26/08Carl Goodrich- VELO Meeting15 Sensor: 2535-8 Measurement: IIV V bias Ground Data from January Total Current: Bias Ring + Guard Ring Humidity = 8.0% Humidity = 7.5%, 7.6%

16. 2/26/08Carl Goodrich- VELO Meeting16 Conclusions Biasing the rubber pad seems to affect the IV curves in two ways: –Causes the current to gradually increase especially after 600V –Increases the error Not as “pretty” More data to suggest that humidity affects the IV curves –However, higher humidity results in a lower current???