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

Regular Article - Experimental Physics

Abstract

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.

Keywords

Thermal Neutron Storage Volume Electron Beam Welding Cold Neutron Reactor Pulse 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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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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