EndCap Module Production for the ATLAS Silicon Tracker (SCT) at CERN and the University of Geneva

This note describes the infrastructure, procedure and quality assurance for the construction of approximately one third of the EndCap modules for the ATLAS Semiconductor Tracker (SCT) by groups at the University of Geneva and CERN

Prototype ATLAS IBL Modules using the FE-I4A Front-End Readout Chip

The ATLAS Collaboration will upgrade its semiconductor pixel tracking detector with a new Insertable B-layer (IBL) between the existing pixel detector and the vacuum pipe of the Large Hadron Collider. The extreme operating conditions at this location have necessitated the development of new radiation hard pixel sensor technologies and a new front-end readout chip, called the FE-I4. Planar pixel sensors and 3D pixel sensors have been investigated to equip this new pixel layer, and prototype modules using the FE-I4A have been fabricated and characterized using 120 GeV pions at the CERN SPS and 4 GeV positrons at DESY, before and after module irradiation. Beam test results are presented, including charge collection efficiency, tracking efficiency and charge sharing.Comment: 45 pages, 30 figures, submitted to JINS

A 35-mW - 3.6mm2 Fully Integrated 0.18µm CMOS GPS Radio

A 35mW- 3.6mm2GPS radio has been integrated in a 0.18µm CMOS process. Housed in a standard VFQFPN52 package, the GPS radio needs just a few external passive components for the input matching network and one external reference for the Synthesizer. The GPS receiver chain down-converts a Coarse/Acquisitions L1 signal with NF-5.3dB, conversion gain 81dB, Image Reject > 32dB. The synthesizer features a phase noise of -95dBc/Hz @1MHz offset and a total integrated phase noise of <7°rms in the [500-Hz-1.5-MHz] band. The one reported here is the smallest and most integrated GPS radio ever reported so far

A 35–mW–3.6mm2 fully integrated 0.18µm CMOS GPS radio

A 35mW - 3.6mm2 GPS radio has been integrated in a 0.18um CMOS process. Housed in a standard VFQFPN52 package, the GPS radio needs just a few external passive components for the input matching network and one external reference for the Synthesizer. The GPS receiver chain down-converts a Coarse/Acquisitions L1 signal with NF=5.3dB, conversion gain 81dB, Image Reject > 32dB. The synthesizer features a phase noise of –95dBc/Hz @1MHz offset and a total integrated phase noise of <7°rms in the [500-Hz -1.5-MHz] band. The one reported here is the smallest and most integrated GPS radio ever reported so far

R&D towards the module and service structure design for the ATLAS inner tracker at the super LHC (SLHC)

We have designed modules and a service structure of silicon microstrip detectors as a part of the ATLAS inner tracker for the SLHC project on the basis of a modular and replaceable concept. Six modules have been completed with common components and by similar procedures. Single module tests and four-module combined tests were performed at each site and have been compared for crosschecking. Details of the module design and electrical performance are presented. A half-module was irradiated up to 5 × 1014 1-MeV neq/cm2 using 24-GeV protons at the CERN PS. Its electrical performance was investigated before and after irradiation. The design of an eight-module structure, which is insertable to and is replaceable from the overall structure, has also been reporte

Design and assembly of double-sided silicon strip module prototypes for the ATLAS upgrade strip tracker.

The LHC foresees a peak luminosity increase of up to $\sim 5\times 10^{34}\,\rm{cm}^{-2}\,\rm{s}^{-1}$ from $\sim$2022 with an integrated luminosity of $\sim 3000\,\rm{fb^{-1}}$ before 2030. The current ATLAS Inner Detector will not stand the predicted radiation levels nor the expected large increase in the hit occupancy rates. A new inner tracker must therefore be designed, built and installed in a relatively short time-scale. The current layout assumes an all-silicon tracker with pixel detectors for the innermost layers and strip modules at higher radii. Major constraints are the requirements of radiation-hard sensors, efficient power distribution, minimum material budget, affordable cost, and fast and reliable production. This note reports on the design of double-sided silicon strip modules for the short-strip region of the upgraded ATLAS inner tracker. The different components of the module are described. The thermal performance is discussed. The assembly sequence of first module prototypes is explained in detail

Electrical results of double-sided silicon strip modules for the ATLAS Upgrade Strip Tracker

A double-sided silicon strip module has been designed for the short-strip barrel region of the future ATLAS inner tracker for the High Luminosity LHC. University of Geneva and KEK have produced first module prototypes with common components and similar assembly procedures and jigs. This note reports on the electrical performance of the modules tested. The data acquisition system is described. Results from individual and combined module readout are shown

The silicon-tungsten tracker of the DAMPE mission

The DArk Matter Particle Explorer (DAMPE) is a high energy astroparticle satellite mission designed to detect electron, photon and cosmic rays with high precision for Dark Matter search, cosmic ray flux and composition measurement and gamma-ray astronomy. One of the key components of the DAMPE payload is the Silicon-Tungsten Tracker (STK), consisting of 6 tracking planes, each plane is made of 2 orthogonal layers of single-sided silicon micro-strip detectors. Three layers of 1 mm thick tungsten plates are interleaved with the tracking planes to serve as photon converter. Besides precise track reconstruction for charge particles and converted photons, the STK will also measure the charge of the incoming cosmic ray, and provide pre-shower information to improve particle identification. After intensive design, prototyping, test and production efforts by the STK collaboration, the construction of the STK has been completed. An Engineering and Qualification Model (EQM) has been produced in April 2014 and passed space qualification tests, as well as extensively tested at with particle beams at CERN. The Flight Model (FM) has been produced in April 2015 and successfully integrated into the DAMPE payload in June 2015, after passing the environmental acceptance test. The DAMPE satellite is scheduled to be launched at the end of 2015

The DAMPE silicon–tungsten tracker

The DArk Matter Particle Explorer (DAMPE) is a spaceborne astroparticle physics experiment, launched on 17 December 2015. DAMPE will identify possible dark matter signatures by detecting electrons and photons in the 5GeV-10TeV energy range. It will also measure the flux of nuclei up to 100 TeV, for the study of the high energy cosmic ray origin and propagation mechanisms. DAMPE is composed of four sub-detectors: a plastic strip scintillator, a silicon-tungsten tracker-converter (STK), a BGO imaging calorimeter and a neutron detector. The STK is composed of six tracking planes of 2 orthogonal layers of single-sided micro-strip detectors, for a total detector surface of ca. 7m2. The STK has been extensively tested for space qualification. Also, numerous beam tests at CERN have been done to study particle detection at silicon module level, and at full detector level. After description of the DAMPE payload and its scientific mission, we will describe the STK characteristics and assembly. We will then focus on some results of single ladder performance tests done with particle beams at CERN

The DAMPE silicon tungsten tracker

The DArk Matter Particle Explorer (DAMPE) satellite has been successfully launched on the 17th December 2015. It is a powerful space detector designed for the identification of possible Dark Matter signatures thanks to its capability to detect electrons and photons with an unprecedented energy resolution in an energy range going from few GeV up to 10 TeV. Moreover, the DAMPE satellite will contribute to a better understanding of the propagation mechanisms of high energy cosmic rays measuring the nuclei flux up to 100 TeV. DAMPE is composed of four sub-detectors: a plastic strip scintillator, a silicon-tungsten tracker-converter (STK), a BGO imaging calorimeter and a neutron detector. The STK is made of twelve layers of single-sided AC-coupled silicon micro-strip detectors for a total silicon area of about 7 $m^2$ . To promote the conversion of incident photons into electron-positron pairs, tungsten foils are inserted into the supporting structure. In this document, a detailed description of the STK construction and its performance on orbit are reported