Speaker
Dr
Selcuk Cihangir
(Fermi National Accelerator Lab. (Fermilab))
Description
FNAL is participating in a CMS Tracker silicon sensor R&D project for the second phase of the planned LHC upgrade (HL-LHC). We present results from the tests conducted at Fermilab to determine the characteristics of thin, single-sided silicon sensors acquired from HPK in order to establish optimal material and strip/pixel features for the upgrade of the CMS Tracker. In addition to increased radiation hardness requirements, the HL-LHC sensors will need to be both robust and relatively low-cost given the very large number of sensors required for the full Tracker. Over one hundred 6 inch wafers were produced by HPK with substrates and thicknesses: MCZ 200 μm, FZ 200 μm, FZ 100 μm, EPI 100 μm, and EPI 75 μm. Sensor geometries included pixel, long pixel, and strips of both n-type and p-type with both p-stop and p-spray isolation. We studied capacitance (to back plane, inter-strip), depletion, and breakdown voltages of the sensors with various thickness and pitches. We also studied the signal-to-noise ratio using a radioactive source. The test setups have the option for repeating the tests at low temperatures, after irradiation of the sensors with protons and neutrons.
Author
Dr
Selcuk Cihangir
(Fermi National Accelerator Lab. (Fermilab))
Co-authors
Dr
Andriy Zatserklyaniy
(University of Puerto Rico, Mayaguez)
Dr
Lenny Spiegel
(Fermi National Accelerator Lab. (Fermilab))
Dr
Ping Tan
(Fermi National Accelerator Lab. (Fermilab))
Mr
Pramod Lamichhane
(Wayne State University)
Dr
Simon Kwan
(Fermi National Accelerator Lab. (Fermilab))
