Speaker
Description
The Electron-Ion Collider (EIC), the future facility at Brookhaven National Laboratory (Upton, NY, USA), will enable precision studies of the partonic structure of nucleons and nuclei across a broad range of Bjorken-x and four-momentum transfer squared Q2, with center-of-mass energies from 20 to 140 GeV. Leveraging high luminosity (1034 cm−2s−1) and polarized beams (electrons, protons, and deuterons up to ~70%), the ePIC detector is designed to fully exploit the EIC's physics potential.
A crucial component of the ePIC detector is the Silicon Vertex Tracker (SVT), responsible for high-precision tracking and vertex reconstruction, particularly important for measuring the electron momentum, and, for example, identifying short-lived particles such as charmed mesons with decay lengths on the order of 100 µm. The SVT consists of three sub-detectors: the Inner Barrel (IB), the Outer Barrel (OB), and Forward/Backward Discs. All rely on Monolithic Active Pixel Sensor (MAPS) which combine high granularity, low power consumption, and minimal material budget.
The IB comprises three innermost layers (L0–L2), utilizing the MOSAIX sensor developed by ALICE for the ITS3 upgrade in a commercial 65 nm CMOS technology with stitching to cover an area close to the whole wafer, and thinned down to 50 um to allow the bending in a cylindrical shape around the beam pipe. The OB, forming layers L3–L4, employs a version of the same sensor (EIC-LAS) with modified size and data interface, integrated into a classical stave structure. In the forward regions, EIC-LAS based lightweight discs have been developed to cover the forward/backward region of detection while minimizing material.
This presentation will provide an overview of the SVT development and design.