The uniformity of discriminator threshold and the precision of internal delay have been studied on single 'Omega3/LHC1' pixel readout chips and on arrays of 24 chips containing 48 768 active pixels. On single chips we measured a threshold variation of 400e(-) r.m.s, for a mean threshold setting of 4000e(-). The internal delay distribution shows a standard deviation of 6 ns on a single chip and 16 ns on the large arrays, after applying a 3-bit delay adjustment. These results, obtained using an electrical stimulus, were confirmed by tests in a beam of high-energy particles. (C) 1998 Elsevier Science B.V. All rights reserved.
Uniformity of response of the LHC1 large area pixel detector system
DI BARI, Domenico;
1998-01-01
Abstract
The uniformity of discriminator threshold and the precision of internal delay have been studied on single 'Omega3/LHC1' pixel readout chips and on arrays of 24 chips containing 48 768 active pixels. On single chips we measured a threshold variation of 400e(-) r.m.s, for a mean threshold setting of 4000e(-). The internal delay distribution shows a standard deviation of 6 ns on a single chip and 16 ns on the large arrays, after applying a 3-bit delay adjustment. These results, obtained using an electrical stimulus, were confirmed by tests in a beam of high-energy particles. (C) 1998 Elsevier Science B.V. All rights reserved.File in questo prodotto:
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