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arXiv · 1308.4610

V2:Performance of the solid deuterium ultra-cold neutron source at the pulsed reactor TRIGA Mainz

J. Karch·Yu. Sobolev·M. Beck·K. Eberhardt·G. Hampel·W. Heil·R. Kieser·T. Reich·N. Trautmann·M. Ziegner
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Abstract

The performance of the solid deuterium ultra-cold neutron source at the pulsed reactor TRIGA Mainz with a maximum peak energy of 10 MJ is described. The solid deuterium converter with a volume of V=160 cm3 (8 mol), which is exposed to a thermal neutron fluence of 4.5x10^13 n/cm2, delivers up to 550 000 UCN per pulse outside of the biological shield at the experimental area. UCN densities of ~ 10/cm3 are obtained in stainless steel bottles of V ~ 10 L resulting in a storage efficiency of ~20%. The measured UCN yields compare well with the predictions from a Monte Carlo simulation developed to model the source and to optimize its performance for the upcoming upgrade of the TRIGA Mainz into a user facility for UCN physics.

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J. Karch, Yu. Sobolev, M. Beck, K. Eberhardt, G. Hampel, W. Heil, R. Kieser, T. Reich, N. Trautmann, M. Ziegner. 2013-08-21. V2:Performance of the solid deuterium ultra-cold neutron source at the pulsed reactor TRIGA Mainz. https://doi.org/10.1140/epja%2Fi2014-14078-9

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