FSD 01 Detectors Simulation Vs Measurements

1. FSD 01 Detectors Simulation Vs Measurements SudipChatterji and Indian Students(Ghosh P, Bansal Y, Joshi N and Sharma N ) GSI Helmholtz Centre for Heavy Ion Research GmbH STS Work Group Meeting 10th January 2012

2. Outline • Motivation • Simulation Vs Measurements • Fluence 1e12 n/cm2 • Fluence 1e13 n/cm2 • Fluence 3e13 n/cm2 • Fluence 1e14 n/cm2 • Overview & Analysis

3. 1. Motivation • To study and verify the FSD Detectors IV & CV Characteristics • To verify the Simulation module for FSD parameters using the models used previously • Role of space charge effect on the Breakdown voltages • To study and validate different models for annealing parameter. • To extract Annealing time constants

4. 2.1.1 Simulation Vs Measurements Fluence ø=1e12(n/cm2)

5. 2.1.2 Simulation Vs Measurements Fluence ø=1e12(n/cm2) • VFD{Measured} ~ 40V • VFD{Simulated} ~ 44V • Leakage current almost comparable • Simulation results holds good

6. 2.2.1 Simulation Vs Measurements Fluence ø=1e13(n/cm2)

7. 2.2.2 Simulation Vs Measurements Fluence ø=1e13(n/cm2) • VFD{Measured} ~ 12V • VFD{Simulated} ~ 15V • Leakage current almost comparable • Simulation results almost holds good

8. 2.3.1 Simulation Vs Measurements Fluence ø=3e13(n/cm2)

9. 2.3.2 Simulation Vs MeasurementsFluence ø=3e13(n/cm2) • Pink curve => Good Detector • VFD{Measured} ~80 V • VFD{Simulated} ~ 90V • Leakage current almost comparable, Simulation results almost holds good • Red curve => Bad Detector • VFD{Measured} ~ not observed • Leakage Current much higher than expected.

10. 2.4.1 Simulation Vs Measurements Fluence ø=1e14(n/cm2)

11. 2.4.2 Simulation Vs Measurements Fluence ø=1e14(n/cm2) • VFD{Measured} & {Simulated} = not observed • BD {Measured} = 220V • BD {Simulated} = 250V • Leakage current almost comparable but • Breakdown appear early in measurements (red & green) • Impact of Qf Observed • Increasing the Qf Decreases Break Down voltage ( blue to pink ~ 8e11 1e12) • May be the Qf ~ 3e12 in measured Detectors

12. 3.1 Simulation Vs MeasurementOverview Measured Values for FSD 01 Simulated Values for FSD 01

13. 3.2 Simulation Vs MeasurementAnalysis • Simulation results holds good with results from FSD01 Detectors. • Leakage current is comparable in both the cases • VFD{Measured} ~ VFD{Simulated} • Type inversion observed after Fluence=1e13 n/cm2 • With some bad detectors, statistics in case of detectors becomes important to verify the simulation results.