Browsing by Subject "3D Sensors"
  • Publication
    Characterization of non-irradiated and irradiated 3D pixel sensors for phase-2 CMS inner tracker upgrade
    ( 2023-07-03) Albelo Ortiz, Edgar J. ; Malik, Sudhir ; College of Arts and Sciences - Sciences ; Marrero Soto , Pablo J. ; Santana Colon, Samuel ; Department of Physics ; Ortiz Bermudez, Patricia
    Este trabajo de tesis se centra en la caracterizaci´on de sensores 3D para el High Luminosity Large Hadron Collider (HL-LHC), espec´ıficamente para el detector de p´ıxeles de la fase 2 del CMS. La mejora del detector interno CMS mejora la capacidad de b-tagging, as´ı como las eficiencias de reconstrucci´on de quarks tau hadr´onicos y trazas dentro de los jets potenciados. Estos jets pueden ser producidos a partir de nuevos objetos pesados que decaen en bosones de Higgs, Z o quarks top, los cuales son sondas pesadas que pueden ser aprovechadas para buscar nuevas f´ısicas. Se evaluaron dos sensores 3D con diferentes tama˜nos de p´ıxeles antes y despu´es de la exposici´on a la radiaci´on, analizando par´ametros como la eficiencia, el tama˜no del cl´uster y la resoluci´on de los impactos. Los resultados sugieren que ambos sensores son candidatos prometedores para su uso en el detector interno, ya que exhiben una alta eficiencia y una gran resoluci´on espacial antes y despu´es de la radiaci´on. Esta investigaci´on proporciona informaci´on valiosa sobre el rendimiento de los sensores 3D bajo la exposici´on a la radiaci´on, lo cual es crucial para el correcto funcionamiento del detector interno en las condiciones extremas esperadas en el HL-LHC.
  • Publication
    Testbeam study of non-irradiated and irradiated pixel sensors for phase-2 CMS inner tracker upgrade
    ( 2023-05-12) Matta Seclen, Maurcio Antonio ; Malik, Sudhir ; College of Arts and Sciences - Sciences ; Marrero Soto, Pablo J. ; Santana Colon, Samuel ; Department of Physics ; Ferrer Lopez, Jose R.
    The CMS experiment at the LHC in Geneva, Switzerland collects data from proton-proton collisions that require more granular pixel devices to accurately determine the 3D location of proton-proton vertices and decay points of secondary particles. To address this challenge, the HL-LHC will require several improvements to the CMS apparatus, including building a new silicon tracking detector. This research focuses on the operation, performance, and characterization of silicon 3D sensors that will be used to build the tracking detector. The sensors are tested at FTBF by the TFPX team with several controlled parameters to determine the impact of track angle and charge collection. The efficiency of the sensors is studied before and after radiation, and the results show that performance is comparable before and after irradiation, with slightly lower efficiencies and cluster sizes after irradiation. Peak charge is higher pre-irradiation than post-irradiation, indicating that irradiated results are not taken under fully-depleted conditions. This research is a step towards enhancing the accuracy of proton-proton collision data collection.