Showing papers by "C.A. Baker published in 2003"
TL;DR: In this paper, the absolute production rate of ultracold neutrons (UCN) produced by the interaction of a cold neutron beam with superfluid helium has been measured over an incident energy range of 0.7 to 4ÕmeV.
65 citations
TL;DR: In this paper, the authors presented a crystal-barrel data set for p p→ωπ + π − π 0 at rest, with ω → π+ π−π−π−0.7±2.
35 citations
University of Zurich1, University of Bonn2, Rutherford Appleton Laboratory3, University of Mainz4, University of Paris5, Karlsruhe Institute of Technology6, Ludwig Maximilian University of Munich7, Queen Mary University of London8, University of California, Berkeley9, CERN10, University of California, Los Angeles11, University of Freiburg12, Hungarian Academy of Sciences13, University of Ljubljana14, University of Illinois at Urbana–Champaign15, University of Silesia in Katowice16, Ruhr University Bochum17, Carnegie Mellon University18, University of Hamburg19, Uppsala University20
TL;DR: In this paper, the authors used the Crystal Barrel detector at LEAR to study the annihilation of antiprotons and protons at rest into neutral particles, and determined the annihilation frequencies for final states containing π 0, η, η ′ and ω mesons using a liquid and a room temperature, 12 bar gaseous hydrogen target.
15 citations
01 Apr 2003-Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
TL;DR: In this paper, surface barrier detectors and PIN diode detectors have been tested and proven to work well at temperatures as low as 80mK and they have been combined with a layer of 6 LiF which converts neutrons to charged particles.
Abstract: As part of an R&D programme for the development of a next-generation experiment to measure the neutron electric dipole moment, in which ultra-cold neutrons (UCN) are produced and stored in superfluid 4 He (superthermal source), we have developed cryogenic detectors of UCN that can operate in situ within the superfluid. Surface barrier detectors and PIN diode detectors have been tested and proven to work well at temperatures as low as 80 mK. When combined with a layer of 6 LiF which converts neutrons to charged particles, these detectors form a reliable UCN detection system which has been tested in liquid helium down to 430 mK. The detectors have operated within superfluid helium for periods of up to 30 days with no signs of degradation. The development of this detection system has enabled us to measure the flux of UCN from a superthermal UCN source with no intervening transmission windows which can attenuate the flux. The addition of thin films of magnetically aligned iron also enables these detectors to be used in situ for neutron spin-polarisation analysis.
10 citations