Status of CMS HGCal silicon Sensor Quality Control(SQC) Tests at NCU, Taiwan

Debabrata Bhowmik^1*

¹Physics, National Central University, Taiwan, Taoyuan, Taiwan

* Presenter:Debabrata Bhowmik, email:debabrata.bhowmik@cern.ch

As part of the CMS phase-II upgrade plan to prepare for the High-Luminosity phase of the LHC (HL-LHC), due to start around 2027, CMS is building a High Granularity sampling Calorimeter (HGCAL), which will replace the existing endcap calorimeters (electromagnetic and hadronic). Due to the higher instantaneous luminosity of the HL-LHC and the rapidity range the HGCAL will cover, radiation tolerance is a primary design consideration. The majority of the HGCAL will be based on 120, 200, and 300 um thick silicon (Si) pad sensors. Optical inspection and electrical characterization of these silicon sensors are performed as part of SQC. HGCAL sensor quality control utilizes a probe card and switching matrix system, named ARRAY (switching mAtRix pRobe cArd sYstem), to contact all sensor cells simultaneously. Sensor measurements include global and single cell I-V and C-V characteristics. In this talk, the status and the results from the HGCal SQC tests performed at NCU, Taiwan will be discussed.

Keywords: HGCal, SQC, HL-LHC, CMS , Phase II upgrade