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Linearly polarised photon beams at ELSA and measurement of the beam asymmetry in \( \pi^{0}_{}\) photoproduction off the proton

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Abstract

At the electron accelerator ELSA a linearly polarised tagged photon beam is produced by coherent bremsstrahlung off a diamond crystal. Orientation and energy range of the linear polarisation can be deliberately chosen by accurate positioning of the crystal with a goniometer. The degree of polarisation is determined by the form of the scattered electron spectrum. Good agreement between experiment and expectations on the basis of the experimental conditions is obtained. Polarisation degrees of \(\ensuremath P_{\gamma}=40\) % are typically achieved at half of the primary electron energy. The determination of \(\ensuremath P_{\gamma}\) is confirmed by measuring the beam asymmetry, \( \Sigma\) , in \( \pi^{0}_{}\) photoproduction and by a comparison of the results to independent measurements using laser backscattering.

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References

  1. G. Knöchlein, D. Drechsel, L. Tiator, Z. Phys. A 352, 327 (1995).

    Google Scholar 

  2. D. Elsner, Eur. Phys. J. A 33, 147 (2007).

    Google Scholar 

  3. W.-T. Chiang, F. Tabakin, Phys. Rev. C 55, 2054 (1997).

  4. T. Nakano, Nucl. Phys. A 684, 71c (2001).

  5. O. Bartalini, Eur. Phys. J. A 26, 399 (2005).

    Google Scholar 

  6. D. Lohmann, Nucl. Instrum. Methods A 343, 494 (1994).

    Google Scholar 

  7. P.L. Cole, in Proceedings of GDH 2002, Genova, 3-6 July 2002 (World Scientific Publishing, 2003).

  8. W. Hillert, Eur. Phys. J. A 28, 139 (2006).

    Google Scholar 

  9. F.H. Dyson, H. Überall, Phys. Rev. 99, 604 (1955).

    Google Scholar 

  10. H. Überall, Phys. Rev. 103, 1055 (1956).

    Google Scholar 

  11. H. Überall, Phys. Rev. 107, 223 (1957).

    Google Scholar 

  12. H. Überall, Z. Naturforsch. 17a, 332 (1962).

  13. G. Diambrini Palazzi, Rev. Mod. Phys. 40, 611 (1968).

    Google Scholar 

  14. U. Timm, Fortschr. Phys. 17, 765 (1969).

    Google Scholar 

  15. K. Fornet-Ponse, The photon tagging system of the CB-experiment at ELSA, in preparation (2009).

  16. K. Livingston, in International Conference on Charged and Neutral Particles Channeling Phenomena, Proc. SPIE 5974, 59740G (2005).

  17. K. Livingston, The Stonehenge Technique. A new method of aligning crystals for linearly polarized photon production from coherent bremsstrahlung, in preparation (2009).

  18. F.A. Natter, Nucl. Instrum. Methods B 211, 465 (2003).

    Google Scholar 

  19. D. Elsner, doctoral thesis, Bonn (2006) http://hss.ulb. uni-bonn.de/diss\_online/math\_nat\_fak/2007/elsner\_ daniel/index.htm.

  20. G.R. Lynch, O.L. Dahl, Nucl. Instrum. Methods B 58, 6 (1991).

    Google Scholar 

  21. A.O. Hanson, Phys. Rev. 84, 634 (1951).

    Google Scholar 

  22. D.T. Cromer, J.T. Waber, Acta. Cryst. 18, 104 (1965).

    Google Scholar 

  23. L.I. Schiff, Phys. Rev. 83, 252 (1951).

    Google Scholar 

  24. E. Aker, Nucl. Instrum. Methods A 321, 69 (1992).

    Google Scholar 

  25. D. Drechsel, S.S. Kamalov, L. Tiator, Nucl. Phys. A 645, 145 (1999).

    Google Scholar 

  26. W.T. Chiang, S.N. Yang, L. Tiator, D. Drechsel, Nucl. Phys. A 700, 429 (2002).

    Google Scholar 

  27. A.V. Anisovich, Eur. Phys. J. A 25, 427 (2005).

    Google Scholar 

Download references

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Authors and Affiliations

  1. Physikalisches Institut der Universität Bonn, Bonn, Germany

    D. Elsner, B. Bantes, R. Ewald, F. Frommberger, K. Fornet-Ponse, W. Hillert, S. Höffgen, Frank Klein, Friedrich Klein, M. Konrad, D. Menze, C. Morales, M. Ostrick, H. Schmieden, B. Schoch, A. Süle & D. Walther

  2. Helmholtz-Institut für Strahlen- und Kernphysik der Universität Bonn, Bonn, Germany

    O. Bartholomy, D. E. Bayadilov, R. Beck, V. Crede, A. Ehmanns, K. Essig, I. Fabry, M. Fuchs, C. Funke, E. Gutz, P. Hoffmeister, I. Horn, J. Junkersfeld, H. Kalinowsky, E. Klempt, J. Lotz, D. V. Novinski, H. van Pee, A. V. Sarantsev, C. Schmidt, T. Szczepanek, U. Thoma, C. Weinheimer & C. Wendel

  3. Petersburg Nuclear Physics Institute, Gatchina, Russia

    D. E. Bayadilov, Y. A. Beloglazov, A. B. Gridnev, I. V. Lopatin, D. V. Novinski, A. V. Sarantsev & V. V. Sumachev

  4. KVI, University of Groningen, Groningen, The Netherlands

    R. Castelijns, H. Löhner, J. G. Messchendorp & S. Shende

  5. Department of Physics, Florida State University, Tallahassee, USA

    V. Crede

  6. Physikalisches Institut, Universität Basel, Basel, Switzerland

    I. Jaegle, M. Kotulla, B. Krusche & T. Mertens

  7. II. Physikalisches Institut, Universität Giessen, Giessen, Germany

    M. Kotulla, S. Lugert, V. Metag, M. Nanova, R. Novotny, L. M. Pant, M. Pfeiffer & D. Trnka

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  1. D. Elsner
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  2. B. Bantes
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  3. O. Bartholomy
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  4. D. E. Bayadilov
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  5. R. Beck
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  6. Y. A. Beloglazov
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  7. R. Castelijns
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  9. A. Ehmanns
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  10. K. Essig
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  11. R. Ewald
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  12. I. Fabry
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  13. F. Frommberger
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  14. K. Fornet-Ponse
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  15. M. Fuchs
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  16. C. Funke
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  17. A. B. Gridnev
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  18. E. Gutz
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  19. W. Hillert
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  20. S. Höffgen
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  21. P. Hoffmeister
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  22. I. Horn
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  23. I. Jaegle
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  24. J. Junkersfeld
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  25. H. Kalinowsky
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  26. Frank Klein
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  27. Friedrich Klein
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  28. E. Klempt
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  29. M. Konrad
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  30. M. Kotulla
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  31. B. Krusche
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  32. H. Löhner
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  33. I. V. Lopatin
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  34. J. Lotz
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  35. S. Lugert
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  36. D. Menze
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  37. T. Mertens
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  38. J. G. Messchendorp
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  39. V. Metag
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  40. C. Morales
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  41. M. Nanova
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  42. D. V. Novinski
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  43. R. Novotny
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  44. M. Ostrick
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  45. L. M. Pant
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  46. H. van Pee
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  47. M. Pfeiffer
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  48. A. V. Sarantsev
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  49. C. Schmidt
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  50. H. Schmieden
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  51. B. Schoch
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  52. S. Shende
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  53. A. Süle
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  54. V. V. Sumachev
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  55. T. Szczepanek
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  56. U. Thoma
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  57. D. Trnka
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  58. D. Walther
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  59. C. Weinheimer
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  60. C. Wendel
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The CBELSA/TAPS Collaboration

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Correspondence to D. Elsner.

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R. Krücken

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The CBELSA/TAPS Collaboration., Elsner, D., Bantes, B. et al. Linearly polarised photon beams at ELSA and measurement of the beam asymmetry in \( \pi^{0}_{}\) photoproduction off the proton. Eur. Phys. J. A 39, 373–381 (2009). https://doi.org/10.1140/epja/i2008-10708-1

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  • DOI: https://doi.org/10.1140/epja/i2008-10708-1

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