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4. Room temperature deposition of superconducting niobium nitride films by ion beam assisted sputtering.

Author

Polakovic, Tomas, Lendinez, Sergi, Pearson, John E., Hoffmann, Axel, Yefremenko, Volodymyr, Chang, Clarence L., Armstrong, Whitney, Hafidi, Kawtar, Karapetrov, Goran, and Novosad, Valentine

Subjects
SUPERCONDUCTING composites, ION beams
Abstract

We use room temperature ion beam assisted sputtering to deposit niobium nitride thin films. Electrical and structural characterizations were performed by electric transport and magnetization measurements at variable temperatures, X-ray diffraction, and atomic force microscopy. Compared to reactive sputtering of niobium nitride, films sputtered in the presence of an ion beam show a remarkable increase in the superconducting critical temperature Tc, while exhibiting lower sensitivity to nitrogen concentration during deposition. Thickness dependence of the superconducting critical temperature is comparable to films prepared by conventional methods at high substrate temperatures and is consistent with behavior driven by quantum size effects or weak localization. [ABSTRACT FROM AUTHOR]

Published
2018
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5. Measurement of the generalized form factors near threshold via $\gamma^* p \to n\pi^+$ at high $Q^2$

Author

Park, Kijun, Gothe, Ralf, Adhikari, Krishna, Adikaram-Mudiyanselage, Dasuni, Anghinolfi, Marco, Baghdasaryan, Hovhannes, Ball, Jacques, Battaglieri, Marco, Baturin, Vitaly, Bedlinskiy, Ivan, Bennett, Robert, Biselli, Angela, Bookwalter, Craig, Boyarinov, Sergey, Branford, Derek, Briscoe, William, Brooks, William, Burkert, Volker, Carman, Daniel, Celentano, Andrea, Chandavar, Shloka, Charles, Gabriel, Cole, Philip, Contalbrigo, Marco, Crede, Volker, D'Angelo, Annalisa, Daniel, Aji, Dashyan, Natalya, De Vita, Raffaella, De Sanctis, Enzo, Deur, Alexandre, Djalali, Chaden, Doughty, David, Dupre, Raphael, Alaoui, Ahmed El, Elfassi, Lamiaa, Eugenio, Paul, Fedotov, Gleb, Fradi, Ahmed, Gabrielyan, Marianna, Gevorgyan, Nerses, Gilfoyle, Gerard, Giovanetti, Kevin, Girod, Francois-Xavier, Goetz, John, Gohn, Wesley, Golovach, Evgeny, Graham, Lewis, Griffioen, Keith, Guidal, Michel, Guo, Lei, Hafidi, Kawtar, Hakobyan, Hayk, Hanretty, Charles, Heddle, David, Hicks, Kenneth, Holtrop, Maurik, Ilieva, Yordanka, Ireland, David, Ishkhanov, Boris, Isupov, Evgeny, Jenkins, David, Jo, Hyon-Suk, Joo, Kyungseon, Khandaker, Mahbubul, Khetarpal, Puneet, Kim, Andrey, Kim, Wooyoung, Klein, Andreas, Klein, Franz, Kubarovsky, A., Kubarovsky, Valery, Kuhn, Sebastian, Kuleshov, Sergey, Kvaltine, Nicholas, Livingston, Kenneth, Lu, Haiyun, MacGregor, Ian, Markov, Nikolai, Mayer, Michael, McKinnon, Bryan, Mestayer, Mac, Meyer, Curtis, Mineeva, Taisiya, Mirazita, Marco, Mokeev, Viktor, Moutarde, Herve, Espitia, Edwin Munevar, Nadel-Turonski, Pawel, Nasseripour, Rakhsha, Niccolai, Silvia, Niculescu, Gabriel, Niculescu, Maria-Ioana, Osipenko, Mikhail, Ostrovidov, Alexander, Paolone, Michael, Pappalardo, Luciano, Paremuzyan, Rafayel, Park, Seungkyung, Pereira, Sergio, Phelps, Evan, Pisano, Silvia, Pogorelko, Oleg, Pozdnyakov, Sergey, Price, John, Procureur, Sebastien, Prok, Yelena, Ricco, Giovanni, Rimal, Dipak, Ripani, Marco, Ritchie, Barry, Rosner, Guenther, Rossi, Patrizia, Sabatie, Franck, Saini, Mukesh, Salgado, Carlos, Schott, Diane, Schumacher, Reinhard, Seraydaryan, Heghine, Sharabian, Youri, Smith, Elton, Smith, Gregory, Sober, Daniel, Sokhan, Daria, Stepanyan, Samuel, Stepanyan, Stepan, Stoler, Paul, Strakovski, Igor, Strauch, Steffen, Taiuti, Mauro, Tang, Wei, Taylor, Charles, Tian, Ye, Tkachenko, Svyatoslav, Trivedi, Arjun, Ungaro, Maurizio, Vernarsky, Brian, Vlasov, Alexander, Voutier, Eric, Watts, Daniel, Weygand, Dennis, Wood, Michael, Zachariou, Nicholas, Zhao, Bo, Zhao, Zhiwen, Kalantarians, N., Hyde, C. E., Département de Physique Nucléaire (ex SPhN) (DPHN), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), CLAS, and Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

We report the first extraction of the pion-nucleon multipoles near the production threshold for the $n\pi^+$ channel at relatively high momentum transfer ($Q^2$ up to 4.2 $\rm{GeV^2}$). The dominance of the s-wave transverse multipole ($E_{0+}$), expected in this region, allowed us to access the generalized form factor $G_1$ within the light-cone sum rule (LCSR) framework as well as the axial form factor $G_A$. The data analyzed in this work were collected by the nearly $4\pi$ CEBAF Large Acceptance Spectrometer (CLAS) using a 5.754 $\rm{GeV}$ electron beam on a proton target. The differential cross section and the $\pi-N$-multipole $E_{0+}/G_D$ were measured using two different methods, the LCSR and a direct multipole fit. The results from the two methods are found to be consistent and almost $Q^2$ independent., Comment: 17pages, 22 figures, Journal article (Physical Review C)

Published
2012
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6. Measurement of ep->ep $\pi^0$ beam spin asymmetries above the resonance region

Author

Masi, Rita, Garcon, Michel, Zhao, Bo, Amaryan, Moscov, Amaryan, Moskov, Ambrozewicz, Pawel, Anghinolfi, Marco, Asryan, Gegham, Avagyan, Harutyun, Baghdasaryan, Hovhannes, Baillie, Nathan, Ball, J. P., Ball, Jacques, Ball, James, Baltzell, Nathan, Baturin, Vitaly, Battaglieri, Marco, Bedlinskiy, Ivan, Bellis, Matthew, Benmouna, Nawal, Berman, Barry, Bertin, Pierre, Biselli, Angela, Blaszczyk, Lukasz, Bouchigny, Sylvain, Boyarinov, Sergey, Bradford, Robert, Branford, Derek, Briscoe, William, Brooks, William, Bultmann, S., Bueltmann, Stephen, Burkert, Volker, Butuceanu, Cornel, Calarco, John, Careccia, Sharon, Carman, Daniel, Casey, Liam, Chen, Shifeng, Cheng, Lu, Cole, Philip, Collins, Patrick, Coltharp, Philip, Crabb, Donald, Crede, Volker, Dashyan, Natalya, Sanctis, Enzo, Vita, Raffaella, Degtiarenko, Pavel, Deur, Alexandre, Dharmawardane, Kahanawita, Dickson, Richard, Djalali, Chaden, Dodge, Gail, Donnelly, Joseph, Doughty, David, Dugger, Michael, Dzyubak, Oleksandr, Egiyan, Hovanes, Egiyan, Kim, Elfassi, Lamiaa, Elouadrhiri, Latifa, Eugenio, Paul, Fedotov, Gleb, Feldman, Gerald, Fradi, Ahmed, Funsten, Herbert, Gavalian, Gagik, Gilfoyle, Gerard, Giovanetti, Kevin, Girod, Francois-Xavier, Goetz, John, Gonenc, Atilla, Gothe, Ralf, Griffioen, Keith, Guidal, Michel, Guler, Nevzat, Guo, Lei, Gyurjyan, Vardan, Hafidi, Kawtar, Hakobyan, Hayk, Hanretty, Charles, Hersman, F., Hicks, Kenneth, Hleiqawi, Ishaq, Holtrop, Maurik, Hyde, Charles, Ilieva, Yordanka, Ireland, David, Ishkhanov, Boris, Isupov, Evgeny, Ito, Mark, Jenkins, David, Jo, Hyon-Suk, Johnstone, John, Joo, Kyungseon, Juengst, Henry, Kalantarians, Narbe, Kellie, James, Khandaker, Mahbubul, Kim, Wooyoung, Klein, Andreas, Klein, Franz, Klimenko, Alexei, Kossov, Mikhail, Krahn, Zebulun, Kramer, Laird, Kubarovsky, Valery, Kuhn, Joachim, Kuhn, Sebastian, Kuleshov, Sergey, Lachniet, Jeff, Laget, Jean, Langheinrich, Jorn, Lawrence, David, Lee, Tsung-Shung, Livingston, Kenneth, Lu, Haiyun, Maccormick, Marion, Markov, Nikolai, Mattione, Paul, Mazouz, Malek, Mckinnon, Bryan, Mecking, Bernhard, Mestayer, Mac, Meyer, Curtis, Mibe, Tsutomu, Michel, Bernard, Mikhaylov, Konstantin, Mirazita, Marco, Miskimen, Rory, Mokeev, Viktor, Moreno, Brahim, Moriya, Kei, Morrow, Steven, Moteabbed, Maryam, Munevar Espitia, Edwin, Mutchler, Gordon, Nadel-Turonski, Pawel, Nasseripour, Rakhsha, Niccolai, Silvia, Niculescu, Gabriel, Niculescu, Maria-Ioana, Niczyporuk, Bogdan, Niroula, Megh, Niyazov, Rustam, Nozar, Mina, Osipenko, Mikhail, Ostrovidov, Alexander, Park, Kijun, Pasyuk, Evgueni, Paterson, Craig, Pereira, Sergio, Pierce, Joshua, Pivnyuk, Nikolay, Pocanic, Dinko, Pogorelko, Oleg, Pozdnyakov, Sergey, Price, John, Procureur, Sebastien, Prok, Yelena, Protopopescu, Dan, Raue, Brian, Ricco, Giovanni, Ripani, Marco, Ritchie, Barry, Ronchetti, Federico, Rosner, Guenther, Rossi, Patrizia, Sabatie, Franck, Salamanca, Julian, Salgado, Carlos, Santoro, Joseph, Sapunenko, Vladimir, Schumacher, Reinhard, Serov, Vladimir, Sharabian, Youri, Sharov, Dmitri, Shvedunov, Nikolay, Smith, Elton, Smith, Lee, Sober, Daniel, Sokhan, Daria, Stavinsky, Aleksey, Stepanyan, Samuel, Stepanyan, Stepan, Stokes, Burnham, Stoler, Paul, Strakovski, Igor, Strauch, Steffen, Taiuti, Mauro, Tedeschi, David, Tkabladze, Avtandil, Tkachenko, Svyatoslav, Tur, Clarisse, Ungaro, Maurizio, Vineyard, Michael, Vlassov, Alexander, Voutier, Eric, Watts, Daniel, Weinstein, Lawrence, Weygand, Dennis, Williams, Michael, Wolin, Elliott, Wood, Michael, Yegneswaran, Amrit, Zana, Lorenzo, Zhang, Jixie, Zhiwen Zhao, Département de Physique Nucléaire (ex SPhN) (DPHN), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), CLAS, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS)

Subjects
12.40.Vv, 13.40.Gp, 13.60.Hb, 13.60.Le, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, Nuclear Experiment
Abstract

5 pages, 6 figures; The beam spin asymmetry (BSA) in the exclusive reaction ep->ep pi0 was measured with the CEBAF 5.77 GeV polarized electron beam and Large Acceptance Spectrometer(CLAS). The xB, Q2, t and phi dependences of the pi0 BSA are presented in the deep inelastic regime. The asymmetries are fitted with a sin(phi) function and their amplitudes are extracted. Overall, they are of the order of 0.04 - 0.11 and roughly independent of t. This is the signature of a non-zero longitudinal-transverse interference. The implications concerning the applicability of a formalism based on generalized parton distributions, as well as the extension of a Regge formalism at high photon virtualities, are discussed.

Published
2008
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7. Phenomenology of the deuteron electromagnetic form factors

Author

Abbott, David, Ahmidouch, Abdellah, Anklin, H., Arvieux, J., Ball, James P., Beedoe, Shelton, Beise, Elizabeth, Bimbot, Louis, Boeglin, Werner, Breuer, Herbert, Carlini, Roger, Chant, Nicholas, Danagoulian, Samuel, Dow, K., Ducret, Jean-Eric, Dunne, Jim, Ewell, Lars, Eyraud, L., Furget, C., Garcon, Michel, Gilman, Ron, Glashausser, Charles, Gueye, Paul, Gustafsson, Kenneth, Hafidi, Kawtar, Honegger, A., Jourdan, J., Kox, Serge, Kumbartzki, Gerfried, Lu, L., Lung, Allison, Markowitz, Pete, Mcintyre, Justin, Meekins, David, Merchez, F., Mitchell, Joseph, Mohring, R., Mtingwa, S., Mrktchyan, H., Pitz, D., Qin, Liming, Ronald Ransome, R Eal, J. -S, Roos, Philip, Rutt, Paul, Sawafta, Reyad, Stepanyan, Stepan, Tieulent, Raphael, Tomasi-Gustafsson, E., Turchinetz, William, Vansyoc, K., Volmer, J., Voutier, E., Williamson, Claude, Wood, Stephen, Yan, Chen, Zhao, Jianguo, Zhao, W., Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), and JLAB t20

Subjects
Physics, Nuclear and High Energy Physics, Range (particle radiation), 010308 nuclear & particles physics, Scattering, Nuclear Theory, FOS: Physical sciences, Charge (physics), Polarization (waves), 01 natural sciences, Characterization (materials science), Computational physics, Deuterium, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Tensor, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment
Abstract

A rigorous extraction of the deuteron charge form factors from tensor polarization data in elastic electron-deuteron scattering, at given values of the 4-momentum transfer, is presented. Then the world data for elastic electron-deuteron scattering is used to parameterize, in three different ways, the three electromagnetic form factors of the deuteron in the 4-momentum transfer range 0-7 fm^-1. This procedure is made possible with the advent of recent polarization measurements. The parameterizations allow a phenomenological characterization of the deuteron electromagnetic structure. They can be used to remove ambiguities in the form factors extraction from future polarization data., 18 pages (LaTeX), 2 figures Feb. 25: minor changes of content and in Table I

Published
2000

8. Dynamics Of Hadronization From Nuclear Semi Inclusive Deep Inelastic Scattering.

Author

Hafidi, Kawtar

Subjects
*INELASTIC scattering, *CELL nuclei, *NUCLEAR physics, *ATTENUATION (Physics), *ELECTRON beams, *PIONS, *CARBON, *IRON, *DEUTERIUM, *NUCLEAR research
Abstract

The CLAS experiment E02-104, part of the EG2 run at Jefferson Lab, was performed to study the hadronization process using semi inclusive deep inelastic scattering off nuclei. Electron beam energy of 5 GeV and the CLAS large acceptance detector were used to study charged pion production. The high luminosity available at Jefferson Lab and the CLAS large acceptance are key factors for such measurements allowing high statistics and therefore multidimensional analyses of the data. Both the multiplicity ratio and the transverse momentum broadening for carbon, iron and lead relative to deuterium are measured. Preliminary results for positive pions are discussed. © 2006 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2006
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9. THE SEARCH FOR THE ONSET OF COLOR TRANSPARENCY: A STATUS REPORT.

Author

DUTTA, DIPANGKAR and HAFIDI, KAWTAR

Subjects
*HADRONS, *QUANTUM chromodynamics, *NUCLEAR physics experiments, *FACTORIZATION, *NUCLEAR size (Physics), *PARTICLES (Nuclear physics)
Abstract

Color transparency (CT) refers to the vanishing of the hadron-nucleon interaction for hadrons produced inside a nucleus in high momentum exclusive processes. We briefly review the concept behind this unique quantum chromodynamics (QCD) phenomenon, the experimental search for its onset and the recent progress made at intermediate energies. [ABSTRACT FROM AUTHOR]

Published
2012
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