Journal article

The HERMES polarized hydrogen and deuterium gas target in the HERA electron storage ring


Authors listAirapetian, A; Akopov, N; Akopov, Z; Amarian, M; Andrus, A; Aschenauer, EC; Augustyniak, W; Avakian, R; Avetissian, A; Avetissian, E; Bailey, P; Balin, D; Baumgarten, C; Beckmann, M; Belostotski, S; Bianchi, N; Blok, HP; Böttcher, H; Borissov, A; Borysenko, A; Bouwhuis, M; Braun, B; Brüll, A; Bryzgalov, V; Capitani, GP; Capiluppi, M; Chen, T; Ciullo, G; Contalbrigo, M; Court, G; Dalpiaz, PF; De Leo, R; Demey, M; De Nardo, L; De Sanctis, E; Devitsin, E; Di Nezza, P; Düren, M; Ehrenfried, M; Elalaoui-Moulay, A; Elbakian, G; Ellinghaus, F; Elschenbroich, U; Fabbri, R; Fantoni, A; Fechtchenko, A; Felawka, L; Frullani, S; Gapienko, G; Gapienko, V; Garibaldi, F; Garrow, K; Gavrilov, G; Gharibyan, V; Graw, G; Grebeniouk, O; Gregor, IM; Hadjidakis, C; Haeberli, W; Hafidi, K; Hartig, M; Hasch, D; Heesbeen, D; Henoch, M; Hertenberger, R; Hesselink, WHA; Hillenbrand, A; Hoek, M; Holler, Y; Hommez, B; Hristova, I; Iarygin, G; Ivanilov, A; Izotov, A; Jackson, HE; Jgoun, A; Kaiser, R; Kinney, E; Kisselev, A; Kobayashi, T; Koch, N; Kolster, H; Kopytin, M; Korotkov, V; Kozlov, V; Krauss, B; Krivokhijine, VG; Lagamba, L; Lapikás, L; Laziev, A; Lenisa, P; Liebing, P; Linden-Levy, LA; Lorenzon, W; Lu, H; Lu, J; Lu, S; Ma, BQ; Malheu, B; Makins, NCR; Mao, Y; Marianski, B; Marukyan, H; Mexner, V; Meyners, N; Mussa, R; Mikloukho, O; Miller, CA; Miyachi, Y; Muccifora, V; Nagaitsev, A; Nappi, E; Naryshkin, Y; Nass, A; Negodaev, M; Nowak, WD; Oganessyan, K; Ohsuga, H; Osborne, A; Pickert, N; Potterveld, DH; Raithel, M; Reggiani, D; Reimer, PE; Reischl, A; Reolon, AR; Riedl, C; Rith, K; Rosner, G; Rostomyan, A; Rubacek, L; Rubin, J; Ryckbosch, D; Salomatin, Y; Sanjiev, I; Savin, I; Schill, C; Schnell, G; Schüler, KP; Seele, J; Seidl, R; Seitz, B; Shanidze, R; Shearer, C; Shibata, TA; Shutov, V; Sinram, K; Sommer, W; Stancari, M; Statera, M; Steffens, E; Steijger, JJM; Stenzel, H; Stewart, J; Stinzing, F; Tait, P; Tanaka, H; Taroian, S; Tchuiko, B; Terkulov, A; Trzeinski, A; Tytgat, M; Vandenbroucke, A; van der Nati, P; van der Steenhoven, G; van Haarlem, Y; Vetterli, MC; Vikhrov, V; Vincter, MG; Vogel, C; Volmer, J; Wang, S; Wendland, J; Wilbert, J; Wise, T; Smit, GY; Ye, Y; Ye, Z; Yen, S; Zihlmann, B; Zupranski, P

Publication year2005

Pages68-101

JournalNuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Volume number540

Issue number1

ISSN0168-9002

eISSN1872-9576

DOI Linkhttps://doi.org/10.1016/j.nima.2004.11.020

PublisherElsevier


Abstract
The HERMES hydrogen and deuterium nuclear-polarized gas targets have been in use since 1996 with the polarized electron beam of HERA at DESY to study the spin structure of the nucleon. Polarized atoms from a Stern-Gerlach Atomic Beam Source are injected into a storage cell internal to the HERA electron ring. Atoms diffusing from the center of the storage cell into a side tube are analyzed to determine the atomic fraction and the atomic polarizations. The atoms have a nuclear polarization, the axis of which is defined by an external magnetic holding field. The holding field was longitudinal during 1996-2000, and was changed to transverse in 2001. The design of the target is described, the method for analyzing the target polarization is outlined, and the performance of the target in the various running periods is presented. (c) 2004 Elsevier B.V. All rights reserved.



Citation Styles

Harvard Citation styleAirapetian, A., Akopov, N., Akopov, Z., Amarian, M., Andrus, A., Aschenauer, E., et al. (2005) The HERMES polarized hydrogen and deuterium gas target in the HERA electron storage ring, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 540(1), pp. 68-101. https://doi.org/10.1016/j.nima.2004.11.020

APA Citation styleAirapetian, A., Akopov, N., Akopov, Z., Amarian, M., Andrus, A., Aschenauer, E., Augustyniak, W., Avakian, R., Avetissian, A., Avetissian, E., Bailey, P., Balin, D., Baumgarten, C., Beckmann, M., Belostotski, S., Bianchi, N., Blok, H., Böttcher, H., Borissov, A., ...Zupranski, P. (2005). The HERMES polarized hydrogen and deuterium gas target in the HERA electron storage ring. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 540(1), 68-101. https://doi.org/10.1016/j.nima.2004.11.020



Keywords


atomic beam sourcedetection of atomic beamsINTERNAL TARGETNUCLEAR-POLARIZATIONpolarimeterspolarized targetsRELAXATION MAGNETIQUE DATOMESspin polarized hydrogen

Last updated on 2025-02-04 at 04:02