The Readout Tests of Freiburg Hybrids using ABCD chips

New SCT forward hybrids have been completed in Freiburg. Their performance, based on readout tests using batches of ABCD chips is presented in this note. A so called Kapton hybrid (K1) was equipped with 6 n-type ABCD-2 chips and a 6 cm n-in-n forward detector. A subset of the 768 strips were ganged...

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Detalles Bibliográficos
Autores principales: Dolezal, Z, Hornung, M, Ketterer, C, Ludwig, J, Rieth, G, Rogalla, M, Runge, K, Unno, N
Lenguaje:eng
Publicado: 1999
Materias:
Acceso en línea:http://cds.cern.ch/record/683834
Descripción
Sumario:New SCT forward hybrids have been completed in Freiburg. Their performance, based on readout tests using batches of ABCD chips is presented in this note. A so called Kapton hybrid (K1) was equipped with 6 n-type ABCD-2 chips and a 6 cm n-in-n forward detector. A subset of the 768 strips were ganged together to simulate 12 cm long strips. After careful grounding no oscillations were observed. The noise values measured are about 0.3 fC (1900 electrons) for 12 cm strips, 0.18 fC (1200 electrons) for 6 cm strips and below 0.09 fC (550 electrons) for unbonded channels. The gain, extracted with a 3 point response curve fit, was rather high (100 -140) and almost independent of FE-Bias current.