The HERMES recoil detector

Airapetian, A. et al. (2013) The HERMES recoil detector. Journal of Instrumentation, 8(05), P05012. (doi: 10.1088/1748-0221/8/05/P05012)

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For the final running period of HERA, a recoil detector was installed at the HERMES experiment to improve measurements of hard exclusive processes in charged-lepton nucleon scattering. Here, deeply virtual Compton scattering is of particular interest as this process provides constraints on generalised parton distributions that give access to the total angular momenta of quarks within the nucleon. The HERMES recoil detector was designed to improve the selection of exclusive events by a direct measurement of the four-momentum of the recoiling particle. It consisted of three components: two layers of double-sided silicon strip sensors inside the HERA beam vacuum, a two-barrel scintillating fibre tracker, and a photon detector. All sub-detectors were located inside a solenoidal magnetic field with a field strength of 1T. The recoil detector was installed in late 2005. After the commissioning of all components was finished in September 2006, it operated stably until the end of data taking at HERA end of June 2007. The present paper gives a brief overview of the physics processes of interest and the general detector design. The recoil detector components, their calibration, the momentum reconstruction of charged particles, and the event selection are described in detail. The paper closes with a summary of the performance of the detection system.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Mahon, Dr David and Murray, Dr Morgan and Hoek, Mr Matthias and Protopopescu, Dr Dan and Shearer, Dr Craig and Keri, Dr Tibor and Hill, Mr Gordon and Burns, Mr Jonathan and Bowles, Ms Jennifer and Clarkson, Mr Anthony and Kaiser, Professor Ralf and Lehmann, Dr Inti and Seitz, Dr Bjoern and Rosner, Professor Guenther
Authors: Airapetian, A., Aschenauer, E. C., Belostotski, S., Borisenko, A., Bowles, J., Brodski, I., Bryzgalov, V., Burns, J., Capitani, G. P., Carassiti, V., Ciullo, G., Clarkson, A., Contalbrigo, M., De Leo, R., De Sanctis, E., Diefenthaler, M., Di Nezza, P., Düren, M., Ehrenfried, M., Guler, H., Gregor, I. M., Hartig, M., Hill, G., Hoek, M., Holler, Y., Hristova, I., Jo, H. S., Kaiser, R., Keri, T., Kisselev, A., Krause, B., Krauss, B., Lagamba, L., Lehmann, I., Lenisa, P., Lu, S., Lu, X. -G., Lumsden, S., Mahon, D., Martinez de la Ossa, A., Murray, M., Mussgiller, A., Nowak, W. -D., Naryshkin, Y., Osborne, A., Pappalardo, L. L., Perez-Benito, R., Petrov, A., Pickert, N., Prahl, V., Protopopescu, D., Reinecke, M., Riedl, C., Rith, K., Rosner, G., Rubacek, L., Ryckbosch, D., Salomatin, Y., Schnell, G., Seitz, B., Shearer, C., Shutov, V., Statera, M., Steijger, J. J. M., Stenzel, H., Stewart, J., Stinzing, F., Trzcinski, A., Tytgat, M., Vandenbroucke, A., Van Haarlem, Y., Van Hulse, C., Varanda, M., Veretennikov, D., Vilardi, I., Vikhrov, V., Vogel, C., Yaschenko, S., Ye, Z., Yu, W., Zeiler, D., and Zihlmann, B.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Journal of Instrumentation
Publisher:IOP Publishing

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
570711Nuclear Physics GroupDavid IrelandScience & Technologies Facilities Council (STFC)ST/J000175/1P&A - PHYSICS & ASTRONOMY