G. Tassielli - Academia.edu (original) (raw)

Papers by G. Tassielli

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2015

2015 6th International Workshop on Advances in Sensors and Interfaces (IWASI), 2015

Astroparticle, Particle and Space Physics, Detectors and Medical Physics Applications - Proceedings of the 9th Conference, 2006

The trigger system for the Barrel Muon Spectrometer of the ATLAS experiment at LHC will be realiz... more The trigger system for the Barrel Muon Spectrometer of the ATLAS experiment at LHC will be realized with 1116 Resistive Plate Chambers1 (RPC) units for a total surface of about 4000 m2. The difficulty in accessing the apparatus after the installation has been completed demands a rigorous quality control (Quality Assurance) for each detector. To achieve this task three different

2007 2nd International Workshop on Advances in Sensors and Interface, 2007

ABSTRACT The counting of the consecutive ionization clusters in a drift chamber is a very promisi... more ABSTRACT The counting of the consecutive ionization clusters in a drift chamber is a very promising technique for particle identification purposes. Although this technique features a number of advantages, the bottleneck for its implementation is represented by the difficulties in realizing a low cost, high-speed electronic interface. In fact, typical time separation between each ionization act in a helium-based gas mixture is from a few ns to a few tens of ns. Thus the read-out interface has to be able to process such a high-speed signals. It will be demonstrated that a read-out channel composed of a fast, large bandwidth preamplifier and of a large conversion rate Analog-to-Digital converter fullfil all the requirements for cluster counting. The recent scaled CMOS integrated circuit technologies allows to realize such a low-cost high-speed front-end, opening the possibility of realizing efficient cluster-counter-based detectors. In this paper, a CMOS 0.13 mum integrated readout circuit, including a fast preamplifier (with a -3B bandwidth of 500 MHz) and lGS/s-6bit ADC is designed for the central tracker of a future collider (ILC, super-B). The performance and the design issues associated to this architecture are discussed.

IEEE Symposium Conference Record Nuclear Science 2004., 2004

The ATLAS Level-1 Muon Trigger will be crucial for the online selection of events with high trans... more The ATLAS Level-1 Muon Trigger will be crucial for the online selection of events with high transverse momentum muons and for its correct association to the bunch-crossing corresponding to the detected events. This system uses dedicated coarse granularity and fast detectors capable of providing measurements in two orthogonal projections. The Resistive Plate Chambers (RPCs) are used in the barrel region (|η| <1). The associated trigger electronics is based on a custom chip, the Coincidence Matrix, that performs space coincidences within programmable roads and time gates. The system is highly redundant and communicates with the ATLAS Level-1 trigger Processor with the MUCTPI Interface. The trigger electronics provides also the Readout of the RPCs. Preliminary results achieved with a full trigger tower with production detectors in the H8 test beam at CERN will be shown. In particular preliminary results on the integration of the barrel muon trigger electronics with the MUCTPI interface and with the ATLAS DAQ system will be discussed.

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2012

We present a novel low mass drift chamber concept, developed in order to fulfill the stringent re... more We present a novel low mass drift chamber concept, developed in order to fulfill the stringent requirements imposed by the experiments for extremely rare processes, which require high resolutions (order of 100-200 keV/c) for particle momenta in a range (50-100 MeV/c) totally dominated by the multiple scattering contribution.

Nuclear Physics B - Proceedings Supplements, 2014

ABSTRACT We developed a high performance full chain for drift chamber signals processing. The Fro... more ABSTRACT We developed a high performance full chain for drift chamber signals processing. The Front End electronics is a multistage amplifier board based on high performance commercial devices. In addition a fast readout algorithm for Cluster Counting and Timing purposes has been implemented on a Xilinx-Virtex 4 core FPGA. The algorithm analyzes and stores data coming from a Helium based drift tube and represents the outcome of balancing between efficiency and high speed performance.

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2006

A detailed description of a dedicated facility built in the Lecce INFN and Physics Department Hig... more A detailed description of a dedicated facility built in the Lecce INFN and Physics Department High Energy Laboratory to test part of the Resistive Plate Counters (RPC) of the ATLAS barrel muon spectrometer is presented. In this cosmic ray test stand the chambers are operated for the first time, after being assembled and equipped with all required services for gas and electrical connections. A complete set of measurements is performed on each chamber in order to certificate its quality and performances before the installation in the experiment.

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2009

Precision measurements at the International Linear Collider on physics channels of crucial intere... more Precision measurements at the International Linear Collider on physics channels of crucial interest are demanding for resolution of the order of dp T =p 2 T ¼ 10 À5 GeV À1 c up to momenta as high as 50 GeV c À1 . A light weight He-based drift chamber with full stereo wires is proposed together with a cluster counting technique, performing potentially better than state-of-the-art TPCs. Detailed studies on the implementation of cluster counting and realization of custom front-end electronics is in advancement.

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2004

The main results of the quality assurance tests performed on the Resistive Plate Chamber used by ... more The main results of the quality assurance tests performed on the Resistive Plate Chamber used by the ATLAS experiment at LHC as muon trigger chambers are reported and discussed. These are dark current, gas volume tomography, gas tightness, efficiency, and noise rate.

We describe the design and functionality of the cosmic ray teststand built at INFN Lecce for ATLA... more We describe the design and functionality of the cosmic ray teststand built at INFN Lecce for ATLAS RPC quality control assurance.