Details

Autor(en) / Beteiligte

• Cindro, V.
• Abidi, S.H.
• Affolder, A.A.
• Arratia, M.
• Ciungu, B.
• Dette, K.
• Dolezal, Z.
• Escobar, C.
• Fadeyev, V.
• García, C.
• Gregor, I.M.
• Hara, K.
• Hommels, L.B.A.
• Ikegai, Y.
• Kodys, P.
• Kramberger, G.
• Kroll, J.
• Lacasta, C.
• Latonova, V.
• Madaffari, D.
• Mandić, I.
• Mikestikova, M.
• Mikuž, M.
• Miñano, M.
• Nakamura, K.
• Orr, R.S.
• Rodriguez, D.
• Rossi, E.
• Solaz, C.
• Soldevila, U.
• Suzuki, J.
• Teuscher, R.
• Unno, Y.
• Wada, S.

Titel

Measurement of the charge collection in irradiated miniature sensors for the upgrade of the ATLAS phase-II strip tracker

Ist Teil von

• Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 2019-04, Vol.924 (C), p.153-159

Ort / Verlag

United States: Elsevier B.V

Erscheinungsjahr

2019

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Miniature sensors with external dimensions of 10 mm x 10 mm were produced together with full-size sensors for the innermost ring (R0) of the end-cap part in the upgraded ATLAS inner tracker (ITk). AC- and DC-coupled n-type strips with three different pitches (wide, default and narrow) were processed on high-resistivity p-type FZ silicon substrates by Hamamatsu Photonics. The miniature sensors were irradiated with 70-MeV protons at CYRIC, Tohoku University (Japan) and reactor neutrons at the Jožef Stefan Institute (Slovenia) to three different 1-MeV neutron equivalent fluences: 0.5, 1 and 2 x 1015neqcm−2. The upper fluence range exceeds the highest anticipated in the innermost part of the ATLAS ITk-Strips over the HL-LHC lifetime (∼1.25 × 1015neqcm2). The charge collection in the test sensors was evaluated systematically using a  90Sr β-source and an Alibava analogue readout system at reverse-bias voltages up to 1000 V. •The charge collection in the test sensors was evaluated systematically.•The collected charge increases with the applied voltage.•At higher voltages the effect of multiplication can be seen.•The multiplication becomes higher at long annealing times.