| ATLAS Note | |
| Report number | ATL-ITK-PROC-2024-011 |
| Title | Analysis of the Quality Assurance results from the initial part of production of the ATLAS18 ITk strip sensors |
| Author(s) |
Bach Marques, Eric (Consejo Superior de Investigaciones Cientificas (CSIC) (ES)) ; Bernabeu Verdu, Jose (Univ. of Valencia and CSIC (ES)) ; Bhardwaj, Avani (University of Toronto (CA)) ; Cindro, Vladimir (Jozef Stefan Institute (SI)) ; Crick, Benjamin Matthew (University of Toronto (CA)) ; Fadeyev, Vitaliy (University of California,Santa Cruz (US)) ; Fernandez-Tejero, Xavi (Simon Fraser University (CA)) ; Fleta Corral, Celeste (Consejo Superior de Investigaciones Cientificas (CSIC) (ES)) ; Gallus, Petr (Czech Technical University (CZ)) ; Hara, Kazuhiko (University of Tsukuba (JP)) ; Hirose, Shigeki (University of Tsukuba (JP)) ; Ishii, Tatsuya (High Energy Accelerator Research Organization (JP)) ; Kanda, Mei ; Kroll, Jiri (Czech Academy of Sciences (CZ)) ; Kvasnicka, Jiri (Czech Academy of Sciences (CZ)) ; Lacasta Llacer, Carlos (Univ. of Valencia and CSIC (ES)) ; Mahajan, Chaitanya Kumar (University of Toronto (CA)) ; Mandic, Igor (Jozef Stefan Institute (SI)) ; Mikestikova, Marcela (Czech Academy of Sciences (CZ)) ; Mikuz, Marko (Jozef Stefan Institute (SI)) ; Nakamura, Koji (High Energy Accelerator Research Organization (JP)) ; Orr, Robert (University of Toronto (CA)) ; Slavikova, Eliska Alice (Czech Academy of Sciences (CZ)) ; Solaz Contell, Carles (Univ. of Valencia and CSIC (ES)) ; Soldevila Serrano, Urmila (Univ. of Valencia and CSIC (ES)) ; Tuma, Pavel (Czech Academy of Sciences (CZ)) ; Ullan, Miguel (Consejo Superior de Investigaciones Cientificas (CSIC) (ES)) ; Unno, Yoshinobu (High Energy Accelerator Research Organization (JP)) |
| Corporate Author(s) | The ATLAS collaboration |
| Publication | 2024 |
| Imprint | 28 Feb 2024 |
| Number of pages | 9 |
| In: | 13th International "Hiroshima" Symposium on the Development and Application of Semiconductor Tracking Detectors, Vancouver, Canada, 3 - 8 Dec 2023 |
| Subject category | Particle Physics - Experiment |
| Accelerator/Facility, Experiment | CERN LHC ; ATLAS |
| Free keywords | Silicon strip sensors ; Parameter analysis |
| Abstract | The production of strip sensors for the ATLAS Inner Tracker (ITk) started in 2021. Since then, a Quality Assurance (QA) program has been carried out continuously, by using specific test structures, in parallel to the Quality Control (QC) inspection of the sensors. The QA program consists of monitoring sensor-specific characteristics and the technological process variability, before and after the irradiation with gammas, neutrons, and protons. After two years, half of the full production volume has been reached and we present an analysis of the parameters measured as part of the QA process. The main devices used for QA purposes are miniature strip sensors, monitor diodes, and the ATLAS test chip, which contains several test structures. Such devices are tested by several sites across the collaboration depending on the type of samples (non-irradiated components or irradiated with protons, neutrons, or gammas). The parameters extracted from the tests are then uploaded to a database and analyzed by Python scripts. These parameters are mainly examined through histograms and time-evolution plots to obtain parameter distributions, production trends, and meaningful parameter-to-parameter correlations. The purpose of this analysis is to identify possible deviations in the fabrication or the sensor quality, changes in the behavior of the test equipment at different test sites, or possible variability in the irradiation processes. The conclusions extracted from the QA program have allowed test optimization, establishment of control limits for the parameters, and a better understanding of device properties and fabrication trends. In addition, any abnormal results prompt immediate feedback to the vendor. |
Record created 2024-02-28, last modified 2024-02-28