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Title: The CLAS12 RICH readout electronics: design, development and test

  1. Univ. degli Studi di Ferrara (Italy)
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
Report Number(s):
JLAB-PHY-17-2649; DOE/OR/23177-4385
DOE Contract Number:
Resource Type:
Country of Publication:
United States

Citation Formats

Turisini, Matteo Turisini. The CLAS12 RICH readout electronics: design, development and test. United States: N. p., 2017. Web. doi:10.2172/1428138.
Turisini, Matteo Turisini. The CLAS12 RICH readout electronics: design, development and test. United States. doi:10.2172/1428138.
Turisini, Matteo Turisini. Sat . "The CLAS12 RICH readout electronics: design, development and test". United States. doi:10.2172/1428138.
title = {The CLAS12 RICH readout electronics: design, development and test},
author = {Turisini, Matteo Turisini},
abstractNote = {},
doi = {10.2172/1428138},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Apr 01 00:00:00 EDT 2017},
month = {Sat Apr 01 00:00:00 EDT 2017}

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  • For decades, electron-proton scattering experiments have been providing a large amount of data on the proton structure function. However, because of the instability of free neutrons, fewer experiments have been able to study the neutron structure function. The BONuS collaboration at Jefferson Laboratory addresses this challenge by scattering electrons off a deuterium target, using a RTPC capable of detecting the low-momentum spectator protons near the target. Events of electrons scattering on almost free neutrons are selected by constraining the spectator protons to very low momenta and very backward scattering angles. In 2005, BONuS successfully measured the neutron structure with scatteringmore » electrons of up to 5.3 GeV energy. An extension of this measurement has been approved using the newly upgraded 12 GeV electron beam and CLAS12 (CEBAF Large Acceptance Spectrometer). For this new set of measurements, a new RTPC detector using GEM trackers is being developed to allow measurements of spectator protons with momenta as low as 70 MeV/c. The new RTPC will use a new readout electronic system, which is also used by other trackers in CLAS12. This thesis will present the first tests of this electronics using a previously built RTPC of similar design.« less
  • In this thesis, a search for second generation leptoquark is presented. It is based on the data collected at the Collider Detector at Fermilab with the Tevatron proton-antiproton collisions ofmore » $$\sqrt{s}$$ = 1.8 TeV. A total integrated luminosity of 110 pb-1 collected during runs in 1992-1995 is used. The search was performed on the charged dimuon plus dijet channel. No evidence for existence of leptoquark was found, and a new production cross section limit is set as a result of this analysis. Using the most recent theoretical calculation of pair leptoquark production [1], a new lower mass limit for second generation scalar leptoquark is extracted. The new limit excludes M(LQ2)< 202 GeV/c2. The Large Hadron Collider (LHC), a proton-proton collider with a center of mass energy ($$\sqrt{s}$$) of 14 TeV, is currently under the construction at CERN. It will be utilised to extend the searches for the leptoquarks to higher mass regions. As in CDF, tracking detectors are essential to identify charged leptons decaying from leptoquarks. A silicon strip tracking detector is being developed for the ATLAS experiment. A dense and fast readout system with a good signal to noise ratio and low power consumption are required with high luminosity and short event collision interval (25 ns) expected at the LHC. A description of a prototype front-end micro-electronic chip, the ADAM, for silicon strip detector readout application is presented. Results from a complete laboratory test as well as its performance on a test beam at CERN are reported.« less
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  • The ultra-rapid development undertaken by the Gulf States of Kuwait, Qatar, Saudi Arabia and the United Arab Emirates is different from that of other countries. After acquiring enormous financial resources in the early seventies, they decided to push ahead toward the goal of modern economies, while simultaneously providing a range of welfare services. Having small populations, they had to import not only technology but also the labor to manage the developmental process. Consequently, as the pace of development increased, so did the migrant populations. Thus, in 1980 nationals (except for Saudi Arabia) were a minority - Kuwaitis were 41.5%, Qatarismore » were 26% and the Emirate nationals were 24%. The development process gave rise to parallel labor market sectors where the welfare and capitalist sectors grew simultaneously. As the capitalist sector imported labor for its economic ventures, social services had to be expanded to cover them, thus incurring a further import of labor. Inevitably, all these societies are experiencing in the course of their rapid development considerable cultural change, not all of it planned or welcome. Each society expects to become economically modern while perserving the relatively unaltered traditional religious and authority structures.« less