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Beam-Induced Nuclear Depolarization in a Gaseous Polarized-Hydrogen Target

1999; American Physical Society; Volume: 82; Issue: 6 Linguagem: Inglês

10.1103/physrevlett.82.1164

1092-0145

K. Ackerstaff, A. Airapetian, Н. Акопов, M. Amarian, E. C. Aschenauer, H. Avakian, R. Avakian, A. Avetissian, B. Bains, C. Baumgarten, M. Beckmann, S. L. Belostotski, J. Belz, T. Benisch, S. Bernreuther, N. Bianchi, J. Blouw, H. Böttcher, A. Borissov, J. Brack, S. Brauksiepe, B. Braun, B. Bray, S. Brons, W. Brückner, A. Brüll, E. E. W. Bruins, H. J. Bulten, R. V. Cadman, G. P. Capitani, Paul Carter, P. Chumney, E. Cisbani, G.R. Court, P.F. Dalpiaz, E. De Sanctis, D. De Schepper, E. Devitsin, P. K. A. de Witt Huberts, P. Di Nezza, M. Düren, A. Dvoredsky, G. Elbakian, A. Fantoni, A. Fechtchenko, M. Ferstl, D. Fick, K. Fiedler, B. W. Filippone, H. Fischer, B. Fox, J. Franz, S. Frabetti, S. Frullani, M.-A. Funk, N. Gagunashvili, H. Gao, Y. Gärber, F. Garibaldi, G. Gavrilov, P. Geiger, V. Gharibyan, V. Giordjian, A. Golendukhin, G. Graw, O. Grebeniouk, P. W. Green, L. G. Greeniaus, C. Großhauser, A. Gute, W. Haeberli, O. Hansen, D. Hasch, O. Häusser, R. Henderson, T. Henkes, M. Henoch, R. Hertenberger, Y. Holler, R. J. Holt, W. Hoprich, H. Ihssen, M. Iodice, A. Izotov, H. E. Jackson, A. Jgoun, R. Kaiser, E. Kinney, A. Kisselev, P. Kitching, Hisao Kobayashi, N. Koch, K. Königsmann, M. Kolstein, H. Kolster, В. А. Коротков, W. Korsch, В. Козлов, L. H. Kramer, V. G. Krivokhijine, G. S. Kyle, W. Lachnit, W. Lorenzon, N. C. R. Makins, S. I. Manaenkov, F. K. Martens, J. W. Martin, F. Masoli, A.O. Mateos, M. McAndrew, K. McIlhany, R. D. McKeown, F. Meißner, A. Metz, N. Meyners, O. Mikloukho, C. A. Miller, Meredith Miller, R. Milner, Valeri Valentinovitch Mitsyn, A. Most, R. Mozzetti, V. Muccifora, А. Нагайцев, Y. Naryshkin, A. M. Nathan, F. Neunreither, M. Niczyporuk, W.‐D. Nowak, M. Nupieri, H. Ogami, T. G. O’Neill, B. Owen, V. Papavassiliou, S. F. Pate, M. Pitt, S. Potashov, D. H. Potterveld, G. Rakness, A. Reali, R. Redwine, A. R. Reolon, R. A. Ristinen, K. Rith, H. F. Roloff, P. Rossi, S. Rudnitsky, M. Ruh, D. Ryckbosch, Y. Sakemi, I. Savin, Friedrich Schmidt, H. Schmitt, G. Schnell, K. P. Schüler, A. Schwind, T.-A. Shibata, T. Shin, V. Shutov, C. Simani, A. Simon, K. Sinram, P. Slavich, J. Sowiński, M. Spengos, E. Steffens, J. Stenger, J. Stewart, F. Stock, U. Stoesslein, M. Sutter, H. Tallini, S. Taroian, A. Terkulov, B. Tipton, M. Tytgat, G. M. Urciuoli, J. J. van Hunen, J. van den Brand, J. van den Brand, G. van der Steenhoven, M. C. Vetterli, M. G. Vincter, E. Volk, W. Wander, S. E. Williamson, T. Wise, K. Woller, S. Yoneyama, K. Zapfe-Düren, H. Zohrabian,

Superconducting Materials and Applications

Spin-polarized atomic hydrogen is used as a gaseous polarized-proton target in high-energy and nuclear-physics experiments operating with internal beams in storage rings. When such beams are intense and bunched, this type of target can be depolarized by a resonant interaction with the transient magnetic field generated by the beam bunches. This effect has been studied with the HERA positron beam in the HERMES experiment at DESY. Resonances have been observed and a simple analytic model has been used to explain their shape and position. Operating conditions for the experiment have been found where there is no significant target depolarization due to this effect.