Details

Autor(en) / Beteiligte

• Darby, B.
• Mazza, S.M.
• McKinney-Martinez, F.
• Padilla, R.
• Sadrozinski, H.F.-W.
• Seiden, A.
• Schumm, B.
• Wilder, M.
• Zhao, Y.
• Arcidiacono, R.
• Cartiglia, N.
• Ferrero, M.
• Mandurrino, M.
• Sola, V.
• Staiano, A.
• Cindro, V.
• Kranberger, G.
• Mandiz, I.
• Mikuz, M.
• Zavtranik, M.
• Boscardin, M.
• Della Betta, G.F.
• Ficorella, F.
• Pancheri, L.
• Paternoster, G.

Titel

Inter-pad dead regions of irradiated FBK Low Gain Avalanche detectors

Ist Teil von

• Journal of instrumentation, 2022-10, Vol.17 (10), p.C10006

Ort / Verlag

Bristol: IOP Publishing

Erscheinungsjahr

2022

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Abstract Low Gain Avalanche Detectors (LGADs) are a type of thin silicon detector with a highly doped gain layer. LGADs manufactured by Fondazione Bruno Kessler (FBK) were tested before and after irradiation with neutrons. In this study, the inter-pad dead regions (IPDRs), defined as the width of the distances between pads, were measured with a TCT laser system. The response of the laser was tuned using β-particles from a 90 Sr source. These insensitive “dead zones” are created by a protection structure to avoid breakdown, the Junction Termination Extension (JTE), which separates the pads. The effect of neutron radiation damage at 1.5 × 10 15  n eq /cm 2 , and 2.5 × 10 15  n eq /cm 2 on IPDRs was studied. These distances are compared to the nominal distances given from the vendor, it was found that at the high fluence there is a better matching of the insensitive region to the designed inter-pad region.