A prospective pulsed source of ultracold neutrons for experiments in fundamental neutron physics

Regular Article - Experimental Physics


Since their discovery, ultracold neutrons (UCNs) have been a unique tool for the investigation of fundamental properties of the free neutron and its interactions. The succesfull installation of a new pulsed superthermal source for ultracold neutrons based on solid deuterium at the TRIGA Mainz reactor is described. In a combination of solid hydrogen acting as pre-moderator and a solid deuterium converter of around 160 cm3, this new UCN source should provide at the experimental area ≥ 370000 UCN to the storage volume with the reactor operated in the pulse mode. In a storage experiment, a UCN density of 18 ± 2 UCN/cm3 was measured applying 1.5 $ pulses with a nominal power of 7 MJ. Assuming a linear behaviour of the UCN output as a function of reactor power this corresponds to a UCN density of 25 ± 3 UCN/cm3 for 2 $ (10 MJ) pulses.


Thermal Neutron Storage Volume Electron Beam Welding Cold Neutron Reactor Pulse 
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  1. 1.
    V.K. Ignatovich, The Physics of Ultracold Neutrons (Oxford Science Publications, Clarendon Press, Oxford, 1990).Google Scholar
  2. 2.
    R. Golub, D.J. Richardson, S.K. Lamoreaux, Ultra-Cold Neutrons (Adam Hilger, Bristol, 1991).Google Scholar
  3. 3.
    S. Arzumanov, L. Bondarenko, S. Chernyavsky et al., Phys. Lett. B 483, 15 (2000).ADSCrossRefGoogle Scholar
  4. 4.
    A.P. Serebrov, V.E. Varlamov, A.G. Kharitonov et al., Phys. Rev. C 78, 035505 (2008).ADSCrossRefGoogle Scholar
  5. 5.
    C.A. Baker, D.D. Doyle, P. Geltenbort et al., Phys. Rev. Lett. 97, 131801 (2006).ADSCrossRefGoogle Scholar
  6. 6.
    A. Steyerl, H. Nagel, F.-X. Schreiber et al., Phys. Lett. A 116, 347 (1986).ADSCrossRefGoogle Scholar
  7. 7.
    D. Dubbers, M.G. Schmidt, Rev. Mod. Phys. 83, 1111 (2011).ADSCrossRefGoogle Scholar
  8. 8.
    U. Trinks, F.J. Hartmann, S. Paul, W. Schott, Nucl. Instrum. Methods Phys. Res. A 440, 666 (2000).ADSCrossRefGoogle Scholar
  9. 9.
    Y. Masuda, T. Kitagaki, K. Hatanaka et al., Phys. Rev. Lett. 89, 284801 (2002).ADSCrossRefGoogle Scholar
  10. 10.
    A. Saunders, M. Makela, Y. Bagdasarova et al., Rev. Sci. Instrum. 84, 013304 (2013).ADSCrossRefGoogle Scholar
  11. 11.
    E.I. Korobkina, B.W. Wehring, A.I. Hawari et al., Nucl. Instrum. Methods Phys. Res. A 579, 530 (2007).ADSCrossRefGoogle Scholar
  12. 12.
    A. Anghel, F. Atchison, B. Blau et al., Nucl. Instrum. Methods Phys. Res. A 611, 272 (2009).ADSCrossRefGoogle Scholar
  13. 13.
    O. Zimmer, F.M. Piegsa, S.N. Ivanov, Phys. Rev. Lett. 107, 134801 (2011).ADSCrossRefGoogle Scholar
  14. 14.
    A.P. Serebrov, V.A. Mityuklaev, A.A. Zakharov et al., Nucl. Instrum. Methods Phys. Res. A 611, 276 (2009).ADSCrossRefGoogle Scholar
  15. 15.
    R. Golub, J.M. Pendlebury, Phys. Lett. A 53, 133 (1975).ADSCrossRefGoogle Scholar
  16. 16.
    H. Menke, N. Trautmann, W.J. Krebs, Kerntechnik 17, 281 (1975).Google Scholar
  17. 17.
    A. Frei, Y. Sobolev, I. Altarev et al., Eur. Phys. J. A 34, 119 (2007).ADSCrossRefGoogle Scholar
  18. 18.
    Th. Lauer, Investigation of a superthermal ultracold neutron source based on a solid deuterium converter for the TRIGA Mainz reactor, Dissertation, Universität Mainz (2010).Google Scholar
  19. 19.
    Z.-Ch. Yu, S.S. Malik, R. Golub, Z. Phys. B 62, 137 (1986).ADSCrossRefGoogle Scholar
  20. 20.
    R.E. MacFarlane, Cold moderator scattering kernel methods, Form 836, Los Alamos National Laboratory, 10/1996.Google Scholar
  21. 21.
    J.R. Granada, Nucl. Instrum. Methods Phys. Res. B 256, 164 (2008).ADSCrossRefGoogle Scholar
  22. 22.
    I. Altarev, F. Atchison, M. Daum et al., Phys. Rev. Lett. 100, 014801 (2008).ADSCrossRefGoogle Scholar

Copyright information

© SIF, Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  1. 1.Forschungs-Neutronenquelle Heinz Maier-Leibnitz (FRM-II)GarchingGermany

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