In:
Journal of Instrumentation, IOP Publishing, Vol. 16, No. 11 ( 2021-11-01), p. P11028-
Abstract:
During the operation of the CMS experiment at the
High-Luminosity LHC the silicon sensors of the Phase-2 Outer Tracker will be exposed to radiation levels that could potentially
deteriorate their performance. Previous studies had determined that planar float zone silicon with n-doped strips on a p-doped substrate
was preferred over p-doped strips on an n-doped substrate. The last step in evaluating the optimal design for the mass production of
about 200 m 2 of silicon sensors was to compare sensors of
baseline thickness (about 300 μm) to thinned sensors (about 240 μm), which promised several benefits at high radiation
levels because of the higher electric fields at the same bias voltage. This study provides a direct comparison of these two
thicknesses in terms of sensor characteristics as well as charge collection and hit efficiency for fluences up to
1.5 × 10 15 n eq /cm 2 . The measurement results
demonstrate that sensors with about 300 μm thickness will ensure excellent tracking performance even at the highest considered
fluence levels expected for the Phase-2 Outer Tracker.
Type of Medium:
Online Resource
ISSN:
1748-0221
DOI:
10.1088/1748-0221/16/11/P11028
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2021
detail.hit.zdb_id:
2235672-1
