6 research outputs found
MuPix and ATLASPix -- Architectures and Results
High Voltage Monolithic Active Pixel Sensors (HV-MAPS) are based on a
commercial High Voltage CMOS process and collect charge by drift inside a
reversely biased diode. HV-MAPS represent a promising technology for future
pixel tracking detectors. Two recent developments are presented. The MuPix has
a continuous readout and is being developed for the Mu3e experiment whereas the
ATLASPix is being developed for LHC applications with a triggered readout. Both
variants have a fully monolithic design including state machines, clock
circuitries and serial drivers. Several prototypes and design variants were
characterised in the lab and in testbeam campaigns to measure efficiencies,
noise, time resolution and radiation tolerance. Results from recent MuPix and
ATLASPix prototypes are presented and prospects for future improvements are
discussed.Comment: 10 pages, proceedings, The 28th International Workshop on Vertex
Detectors (VERTEX 2019), 13 - 18 Oct 2019, Lopud Island, Croati
Spektralphotometrische Bestimmung von Eisen als Phenylfluoronkomplex sensibilisiert mit Triton X-100
Multiplicity dependence of the average transverse momentum in pp, p-Pb, and Pb-Pb collisions at the LHC
The average transverse momentum (p(T)) versus the charged-particle multiplicity N-ch was measured in p-Pb collisions at a collision energy per nucleon-nucleon root S-NN = 5.02 TeV and in pp collisions at collision energies of root s = 0.9, 2.76, and 7 TeV in the kinematic range 0.15 < p(T) < 10.0 GeV/c and vertical bar eta vertical bar < 0.3 with the ALICE apparatus at the LHC. These data are compared to results in Pb-Pb collisions at root S-NN = 2.76 TeV at similar charged-particle multiplicities. In pp and p-Pb collisions, a strong increase of (p(T)) with N-ch is observed, which is much stronger than that measured in Pb-Pb collisions. For pp collisions, this could be attributed, within a model of hadronizing strings, to multiple-parton interactions and to a final-state color reconnection mechanism. The data in p-Pb and Pb-Pb collisions cannot be described by an incoherent superposition of nucleon-nucleon collisions and pose a challenge to most of the event generators. (C) 2013 CERN. Published by Elsevier B.V. All rights reserved