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Large enhancement of deuteron polarization with frequency modulated microwaves

1996; Elsevier BV; Volume: 372; Issue: 3 Linguagem: Inglês

10.1016/0168-9002(95)01376-8

1872-9576

B. Adeva, E. Arık, S. Ahmad, A. Arvidson, B. Badełek, M. Ballintijn, G. Bardin, G. Baum, P. Berglund, L. Betev, I. Bird, R. Birsa, P. Björkholm, B. E. Bonner, N. de Botton, M. Boutemeur, F. Bradamante, A. Bressan, A. Brüll, J. Buchanan, S. Bültmann, E. Burtin, C. Cavata, Jiahui Chen, J.M. Clement, M. Clocchiatti, M. Corcoran, Donald G. Crabb, J. Cranshaw, J. Çuhadar, S. Dalla Torre, A. Deshpande, R. van Dantzig, Donal B. Day, S. Dhawan, C. Dulya, A. Dyring, S. Eichblatt, J.C. Faivre, D. Fasching, F. Feinstein, Christian Fernandéz, B. Frois, C. Garabatos, J. A. Garzón, T. Gaussiran, M. Giorgi, E. von Goeler, I.A. Golutvin, A. Gómez, G. Gracia, N. De Groot, M. Große Perdekamp, E. Gülmez, D. von Harrach, T. Hasegawa, P. Hautle, N. Hayashi, C. A. Heusch, N. Horikawa, V. W. Hughes, G. Igo, S. Ishimoto, T. Iwata, M. de Jong, E.M. Kabuß, T. Kageya, R. Kaiser, A. Karev, H.J. Kessler, T. Ketel, I. Kiryushin, A. Kishi, Yu. Kisselev, L. Klostermann, D. Krämer, V. G. Krivokhijine, V. Kukhtin, J. Kyynäräinen, M. Lamanna, U. Landgraf, K. Lau, T. Layda, J.M. Le Goff, F. Lehar, A. de Lesquen, J. Lichtenstadt, T. Lindqvist, M. Litmaath, S. Lopez-Ponte, M. Löwe, A. Magnon, G.K. Mallot, F. Marie, A. Martin, J. Martino, T. Matsuda, B. Mayes, J. S. McCarthy, K. Medved, G. van Middelkoop, D. H. Miller, Jason W. Mitchell, K. Mori, J. Moromisato, G. S. Mutchler, А. Нагайцев, J. Nassalski, L. Naumann, B.S. Neganov, T. Niinikoski, J.E.J. Oberski, A. Ogawa, S. Okumi, C. Özben, A. Penzo, Carlos A. Pérez, F. Perrot-Kunne, D. Peshekhonov, R. Piegaia, L. Pinsky, S. Platchkov, M. Pló, D. Pose, H. Postma, J. Pretz, T. Pussieux, J. Pyrlik, İskender Atilla Reyhancan, J.M. Rieubland, A. Rijllart, J. B. Roberts, S. E. Rock, Miguel Á. Rodríguez, E. Rondio, O. Rondon, L. Ropelewski, A. Rosado, I. Sabo, J. Saborido, G. Salvato, A. Sandacz, D. A. Sanders, I. Savin, P. Schiavon, K. P. Schüler, R. E. Segel, R. Seitz, Yannis K. Semertzidis, С. В. Сергеев, F. Sever, P. Shanahan, E. P. Sichtermann, G.I. Smirnov, A. Staude, A. Steinmetz, H. B. Stuhrmann, K.M. Teichert, F. Tessarotto, Walter Thiel, M. Velasco, J. Vogt, R. Voss, R. Weinstein, C. Whitten, Regine Willumeit–Römer, R. Windmolders, W. Wiślicki, A. Witzmann, A. Yáñez, N. Zamiatin, A. Zanetti, J. Zhao,

Particle physics theoretical and experimental studies

We report a large enhancement of 1.7 in deuteron polarization up to values of 0.6 due to frequency modulation of the polarizing microwaves in a two liters polarized target using the method of dynamic nuclear polarization. This target was used during a deep inelastic polarized muon-deuteron scattering experiment at CERN. Measurements of the electron paramagnetic resonance absorption spectra show that frequency modulation gives rise to additional microwave absorption in the spectral wings. Although these results are not understood theoretically, they may provide a useful testing ground for the deeper understanding of dynamic nuclear polarization.