The ATLAS Semiconductor Tracker (SCT) consists of four barrel cylinders and 18 end-cap disks. This paper describes the SCT modules of the barrel region, of which more than 2000 are about to be constructed. The module design is fixed. Its design concept is given together with the electrical, thermal and mechanical specifications. The pre-series production of the barrel modules is underway using mass-production procedures and jigs. The pre-series modules have given satisfactory performances on noise, noise occupancy, electrical as well as mechanical and thermal properties. In addition, irradiated modules were demonstrated to work successfully. Also first results from a 10-module system test are given.

/pdf/construction-and-performance-of-the-atlas-silicon-microstrip-4wxou5ssea.pdf

Construction and performance of the ATLAS silicon microstrip barrel modules

The development of silicon microstrip detectors for high luminosity application at the Large Hadron Collider (LHC) is described. The technical choices are most severely restricted by the anticipated radiation damage. A radiation-tolerant choice for the silicon tracker of the LHC detector ATLAS are sandwiches of single-sided detectors with n-strips in n-type bulk.

/pdf/silicon-microstrip-detectors-in-high-luminosity-application-4y1rlyb4gb.pdf

Silicon microstrip detectors in high luminosity application

Introduction CCDs sensitive to minimum-ionizing particles (hereafter referred to as min-I particles) have found a niche as very high precision tracking devices, used as vertex detectors for the detection of short-lived heavy flavor quarks or τ leptons, in high energy physics experiments [1-3]. As such, they must be located as close as possible to the interaction point (usually starting within 10 or 20 mm). In this environment the capability of these pixel-based devices to tolerate very high hit densities (typically

http://inspirehep.net/record/446822/files/slac-pub-7569.pdf

Radiation damage in CCDs used as particle detectors

Results are reported from a beam test of prototype silicon microstrip detectors and front-end electronics developed for use in the LHC detector ATLAS. The detector assemblies (“modules”) were 12 cm long and were read out with binary electronics. Both irradiated and unirradiated modules were measured in a 1.56 T magnetic field for efficiency, noise occupancy, and position resolution as a function of bias voltage, binary hit threshold, and detector rotation angle with respect to the beam direction.

/pdf/beam-test-of-the-atlas-silicon-detector-modules-1551wup6aw.pdf

Beam test of the ATLAS silicon detector modules

A novel hybrid structure for the barrel module of the ATLAS Semiconductor Tracker (SCT) is developed. The hybrid carries 12 bare readout chips totaling 1536 channels. A flexible copper-polyimide 4-layer lamination is used as a basic circuit. The circuit is re-enforced by two carbon-carbon bridges coated with Parylene polymer. The hybrid staffed by resistors, capacitors and pitch adaptors undergoes heat cycling and quality inspections. The hybrid after chip mounting and wire bonding is placed over the top and bottom sides of the module assembly with no direct contact to silicon sensors. Some twenty full-fledge modules with active silicon strip sensors were assembled Their electrical, mechanical as well as thermal performances of the module are proven to be excellent.

Development of the hybrid structure for the barrel module of the ATLAS silicon microstrip tracker

We report results from beam tests on silicon microstrip detectors using a binary readout system for ATLAS. The data were collected during the H8 beam test at CERN in August/September 1995 and the KEK test in February 1996. The binary modules tested had been assembled from silicon microstrip detectors of different layout and from front-end electronics chips of different architecture. The efficiency, noise occupancy and position resolution were determined as a function of the threshold setting for various bias voltages and angles of incidence for both irradiated and non-irradiated detectors. In particular, the high spatial resolution of the beam telescope allowed the evaluation of the performance as a function of the track location in between detector strips.

/pdf/test-results-on-silicon-micro-strip-detectors-for-atlas-1zblzt3fsk.pdf

Test results on silicon micro-strip detectors for ATLAS

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Test results on silicon micro-strip detectors for ATLAS