Project Update 7 Shiyu Wang Boston University CERN

Project Update 7 Shiyu Wang (Boston University) CERN, Project Update 7

MALTA Telescope Scripts Updated This script can let us change every setup for the IV measurements without do them manually in the lab (Now compatible for both MALTA and Monopix sensor) However with every plot I can only show one sample (chip wafer) with a single pwell voltage and one max-sub voltage, which are very hard for us to observe the breakdown voltage. 12/26/20 21 MALTA Telescope 2

Analysis Scripts for merge IV Plots: (MALTA example, not Telescope) Another data analysis scripts for us to combine all the single plots I made for one sample. The reason for this will proved to be useful in future irradiated experiments. 12/26/20 21 MALTA Telescope 3

Telescope IV Scans Example: MALTA sensor unirradiated W 1 R 10: at pwell 0 V, scan SUB from -2 to 4 V with 40 steps (1) at pwell -2 V, scan SUB from -2 to 4 V with 60 steps (2) at pwell -3 V, scan SUB from -4 to 10 V with 10 steps (3) Combined histogram from all observable plots (4) (1) (2) 12/26/2021 (3) (4) 4

Irradiated test for MALTA with Fe-55 • So far all the IV scans I performed are for unirradiated samples (chips), Which are not the case for the actual situation (chips within the ATLAS ITK) • We simulate this environment with some radioactive source (Fe-55 isotope) • The required radiation tolerance are 60 Mrad TID or 10^15 NIEL, use Fe-55 to radiate this much radiation on MALTA then do the IV scan again based on the results for unirradiated scans, see if anything changes 12/26/20 21 MALTA Telescope 5

Telescope IV Irradiated Example: Irradiated W 1 R 1, W 1 R 3: at pwell 0 V, scan SUB from 0 to -10 V with 40 steps at pwell -1 V, scan SUB from 0 to -10 V with 40 steps at pwell -2 V, scan SUB from 0 to -10 V with 40 steps 12/26/20 21 MALTA Telescope 6

Future Plans • Finish analysis IV scans for unirradiated samples from W 1 to W 6 then integrate all the results into the broader documents for the chip • Irradiated Test for increased pwell samples on Telescope (-6 V) starts today afternoon • Continue add IV scans analysis for irradiated samples after the test has completed 12/26/20 21 MALTA Telescope 7