Skip to main content
SpringerLink
Log in

Do unpolarized electrons affect the polarization of a stored beam?

  • Published:
Hyperfine Interactions Aims and scope Submit manuscript

Abstract

We present a short overview of the PAX physics case for polarized antiprotons. In order to progress towards a stored polarized antiproton beam, it is crucial to understand the interaction of polarized protons with unpolarized electrons. Therefore investigations that address in particular the contributions of electrons to the polarization buildup of a stored proton beam are presented here in more detail. The measurement of the depolarizing p e cross section settled a long-standing controversy about the role of electrons in the polarization buildup of a stored beam by spin-filtering. Instead of studying the buildup of polarization in an initially unpolarized beam, here the inverse situation was investigated by observation of the depolarization of an initially polarized beam. For the first time, electrons in the electron cooler have been used as a target to study their depolarizing effect on a 49.3 MeV proton beam orbiting in COSY. The foreseen spin-filtering experiments at COSY–Jülich and at the AD of CERN are briefly discussed as well.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. Rathmann, F. [PAX Collaboration]: In: Imai, K., Murakami, T., Saito, N., Tanida, K. (eds.) Proceedings of the 17th international spin physics symposium, Kyoto, Japan, 2006. AIP Conf. Proc., vol. 915, p. 924 (2007)

  2. Lenisa, P. (Ferrara University, Italy), Rathmann, F. (Forschungszentrum Jülich, Germany) [PAX Collaboration]: Technical proposal for antiproton–proton scattering experiments with polarization. Available from http://arXiv:hep-ex/0505054 (2005). An update of this proposal can be found at the PAX website http://www.fz-juelich.de/ikp/pax

  3. The reports from the various committees can be found at the PAX collaboration website at http://www.fz-juelich.de/ikp/pax

  4. Rathmann, F., et al.: Phys. Rev. Lett. 94, 014801 (2005)

    Article  ADS  Google Scholar 

  5. Garishvili, A., et al.: MOPCH083. In: Biscari, C., Owen, H., Petit-Jean-Genaz, Ch., Poole, J., Thomason, J. (eds.) Proc. of the EPAC 2006, Edinbough, Scotland, p. 223 (2006). ISBN 92-9083-278-9 and ISBN 978-92-9083-278-2. Available from http://accelconf.web.cern.ch/AccelConf/e06/

  6. Krisch, A.D., Lin, A.M.T., Chamberlain, O. (eds.): In: Proc. of the workshop on polarized antiprotons, Bodega Bay, CA, 1985. AIP Conf. Proc., vol. 145. AIP, New York (1986)

    Google Scholar 

  7. Grosnick, D.P., et al.: Nucl. Instrum. Methods A 290, 269 (1990)

    Article  ADS  Google Scholar 

  8. Spinka, H., et al.: In: Stephenson, E.J., Vigdor, S.E. (eds.) Proc. of the 8th int. symp. on polarization phenomena in nuclear physics, Bloomington, Indiana, 1994. AIP Conf. Proc., vol. 339, p. 713. AIP, Woodbury (1995)

  9. Martin, A., et al.: Nucl. Phys. A 487, 563 (1988)

    Article  ADS  Google Scholar 

  10. Birsa, R., et al.: Phys. Lett. B 155, 437 (1985)

    Article  ADS  Google Scholar 

  11. Niinikoski, T.O., Rossmanith, R.: Nucl. Instrum. Methods A 255, 460 (1987)

    Article  ADS  Google Scholar 

  12. Cameron, P., et al.: In: Makdisi, Y.I., Luccio, A.U., MacKay, W.W. (eds.) Proc. of the 15th int. spin physics symp., Upton, New York, 2002. AIP Conf. Proc., vol. 675, p. 781. AIP, Melville (2003)

  13. Rathmann, F., et al.: Phys. Rev. Lett. 71, 1379 (1993)

    Article  ADS  Google Scholar 

  14. Arenhövel, H.: Eur. Phys. J. A 34, 303 (2007)

    Article  ADS  Google Scholar 

  15. Walcher, T., et al.. Eur. Phys. J. A 34, 447 (2007)

    Article  ADS  Google Scholar 

  16. Milstein, I., Salnikov, S.G., Strakhovenko, V.M.: Nucl. Instrum. Methods B 266, 3453 (2008)

    Article  ADS  Google Scholar 

  17. Lenisa, P. (Ferrara University, Italy), Rathmann, F. (Forschungszentrum Jülich, Germany) [PAX Collaboration]: Letter-of-intent for spin filtering studies at COSY. Available from the PAX website http://www.fz-juelich.de/ikp/pax/

  18. Nass, A., et al. [PAX Collaboration]: In: Imai, K., Murakami, T., Saito, N., Tanida, K. (eds.) Proceedings of the 17th international spin physics symposium, Kyoto, Japan, 2006. AIP Conf. Proc., vol. 915, p. 1002 (2007)

  19. Lenisa, P. (Ferrara University, Italy), Rathmann, F. (Forschungszentrum Jülich, Germany) [PAX Collaboration]: Letter-of-intent for measurement of the spin-dependence of the \({\bar p}p\) interaction at the AD-ring (2005). Available from http://arXiv:hep-ex/0512021

Download references

Author information

Authors and Affiliations

  1. Institut für Kernphysik and Jülich Center for Hadron Physics, Forschungszentrum Jülich, 52425, Jülich, Germany

    Frank Rathmann

Authors
  1. Frank Rathmann
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Frank Rathmann.

Additional information

For the ANKE and PAX collaborations.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Rathmann, F. Do unpolarized electrons affect the polarization of a stored beam?. Hyperfine Interact 194, 159–164 (2009). https://doi.org/10.1007/s10751-009-0044-3

Download citation

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s10751-009-0044-3

Keywords

PACS

Search

Navigation