Abstract
The physics aims at the proposed future CLIC high-energy linear e+ e− collider pose challenging demands on the performance of the detector system. In particular the vertex and tracking detectors have to combine precision measurements with robustness against the expected high rates of beam-induced backgrounds. A spatial resolution of a few microns and a material budget down to 0.2% of a radiation length per vertex-detector layer have to be achieved together with a few nanoseconds time stamping accuracy. These requirements are addressed with innovative technologies in an ambitious detector R&D programme, comprising hardware developments as well as detailed device and Monte Carlo simulations based on TCAD, Geant4 and Allpix2. Various fine pitch hybrid silicon pixel detector technologies are under investigation for the CLIC vertex detector. The CLICpix and CLICpix2 readout ASICs with 25 μm pixel pitch have been produced in a 65 nm commercial CMOS process and bump-bonded to planar active edge sensors as well as capacitively coupled to High-Voltage (HV) CMOS sensors. Monolithic silicon tracking detectors are foreseen for the large surface (≈ 140 m2) CLIC tracker. Fully monolithic prototypes are currently under development in High-Resistivity (HR) CMOS, HV-CMOS and Silicon on Insulator (SOI) technologies. The laboratory and beam tests of all recent prototypes profit from the development of the CaRIBou universal readout system. This paper presents an overview of the CLIC pixel-detector R&D programme, focusing on recent test-beam and simulation results.
Highlights
: The physics aims at the proposed future CLIC high-energy linear e+e− collider pose challenging demands on the performance of the detector system
The clock distribution to the planes is assured by a Trigger Logic Unit (TLU) providing the time reference (t0) and measuring accurately the coincidence signal of two scintillator tiles located at each end of the telescope
The control and readout interface board unit (CaRIBOu) [4] is a versatile readout system designed to facilitate the design of the interface to pixel detector prototypes
Summary
The CLICdp collaboration studies the available pixel detector technologies, evaluates their tracking performance and identifies promising technologies for the construction of the CLIC tracking and vertex detectors. To provide a versatile platform for the development of a readout system for each of the prototypes, the CaRIBOu test system was developed [4]. Simulation tools such as technology computer-assisted design (TCAD) simulation and MonteCarlo charge transport were employed to increase the understanding of the detector and provide feedback for the designers realizing the prototypes. The clock distribution to the planes is assured by a Trigger Logic Unit (TLU) providing the time reference (t0) and measuring accurately the coincidence signal of two scintillator tiles located at each end of the telescope. Combining the timing information of the scintillators and the telescope planes, a timing resolution per track of 1 ns is achieved along with a pointing resolution at the DUT of 3 μm
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