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The Muon Spectrometer of the ATLAS Experiment at CERN is composed of Thin Gap Chambers (TGC) and Monitoring Drift Tubes (MDT) technologies. TGCs are arranged in 6 Big Wheels and 2 Small Wheels. Gain stability and efficiency are required to be monitored during the Large Hadron Collider (LHC) operation (runs). A Charge monitoring board is identified as a solution to measure gain and efficiency during runs for the forthcoming High Luminosity upgrade. Specifications and topology are proposed with preliminary results as a demonstration of feasibility.

Atomic nuclei can be used as spatial analyzers of the hadronization process in semi-inclusive deep inelastic scattering. The study of this process using fully-identified final state hadrons began with the HERMES program in the late 1990s, and is now continuing at Jefferson Lab. In the measurement described here, electrons and positive pions were measured from a 5 GeV electron beam incident on targets of liquid deuterium, C, Fe, and Pb using CLAS in Hall B. The broadening of the transverse momentum of positive pions has been studied in detail as a function of multiple kinematic variables, and interpreted in terms of the transport of the struck quark through the nuclear systems. New insights are being obtained into the hadronization process from these studies; and experiments of this type can be relevant for the interpretation of jet quenching and proton-nucleus collisions at RHIC and LHC. These measurements will be extended in the next few years with the approved JLab experiment E12-06-117, and later at a future Electron-Ion Collider., Comment: 3 pages, 2 figures; proceedings of the 19th Particles & Nuclei International Conference (PANIC), 2011, with one updated figure

The preliminary results are presented for Jefferson Lab experiment E02‐104 which was performed in the CLAS detector at Thomas Jefferson National Accelerator Facility. During the experiment, data on semi‐inclusive production of hadrons in deep‐inelastic scattering of a lepton off nuclei were acquired. These data provide important information about the space‐time development of in‐medium hadronizaton as well as give an opportunity to investigate the fragmentation processes in the nuclear medium. Transverse momentum broadening and hadronic multiplicity ratios for positively charged pions were measured as multidimensional functions of kinematic variables from different nuclear targets.

Over the past decade, new data from HERMES, Jefferson Lab, Fermilab, and RHIC that connect to parton propagation and hadron formation have become available. Semi-inclusive DIS on nuclei, the Drell-Yan reaction, and heavy-ion collisions all bring different kinds of information on parton propagation within a medium, while the most direct information on hadron formation comes from the DIS data. Over the next decade one can hope to begin to understand these data within a unified picture. We briefly survey the most relevant data and the common elements of the physics picture, then highlight the new Jefferson Lab data, and close with a prospective for the future., Comment: Invited talk delivered at the Sixth International Conference on Perspectives in Hadronic Physics, ICTP, Trieste, Italy, 12-16 May 2008. 8 pages, 5 figures

The propagation of colored quarks through strongly interacting systems, and their subsequent evolution into color-singlet hadrons, are phenomena that showcase unique facets of Quantum Chromodynamics (QCD). Medium-stimulated gluon bremsstrahlung, a fundamental QCD process, induces broadening of the transverse momentum of the parton, and creates partonic energy loss manifesting itself in experimental observables that are accessible in high energy interactions in hot and cold systems. The formation of hadrons, which is the dynamical enforcement of the QCD confinement principle, is very poorly understood on the basis of fundamental theory, although detailed models such as the Lund string model or cluster hadronization models can generally be tuned to capture the main features of hadronic final states. With the advent of the technical capability to study hadronic final states from lepton scattering with good particle identification and at high luminosity, a new opportunity has appeared. Study of the characteristics of parton propagation and hadron formation as they unfold within atomic nuclei are now being used to understand the coherence and spatial features of these processes and to refine new experimental tools that will be used in future experiments. Fixed-target data on nuclei with lepton and hadron beams, and collider experiments involving nuclei, all make essential contact with these topics and they elucidate different aspects of these same themes. In this paper, a survey of the most relevant recent data and its potential interpretation will be followed by descriptions of planned experiments at Jefferson Lab following the completion of the 12 GeV upgrade, and feasible measurements at a future Electron-Ion Collider., Proceedings contribution to the "The 10th Latin American Symposium on Nuclear Physics and Applications" in Montevideo, Uruguay, November 29-30, 2013; slightly updated and with a more complete list of references