Tübingen 2003 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 45: Instrumentation und Anwendungen VI

HK 45.2: Group Report

Thursday, March 20, 2003, 17:00–17:30, C

An intense ultra-cold neutron source at PSI — •A. Pichlmaier — Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland

A new high intensity source for ultra-cold neutrons (UCN) is being built at PSI. It uses the full intensity proton beam of the PSI ring cyclotron (2 mA, 590 MeV) in macro pulses of a few seconds length. Spallation neutrons are produced on a heavy metal target, moderated in D₂O, cooled and partially down-scattered into UCN in solid D₂. The UCN are extracted into a storage volume, where we expect UCN densities of 3000 cm⁻³ on average in a 2 m³ volume. The primary aim for the source is to provide UCN for a new precision search for a neutron electric dipole moment. We aim for an improvement of two orders of magnitude over the current best limit.