Production of ultracold neutrons from cryogenic 2H2, O2, and C2H4 converters

F. Atchison; B. Blau; K. Bodek; B. van den Brandt; T. Bryś; M. Daum; P. Fierlinger; P. Geltenbort; P. Hautle; R. Henneck; S. Heule; A. Holley; M. Kasprzak; K. Kirch; A. Knecht; J. A. Konter; M. Kuźniak; C.-Y. Liu; A. Pichlmaier; C. Plonka; Y. Pokotilovski; A. Saunders; D. Tortorella; M. Wohlmuther; A. R. Young; J. Zejma; G. Zsigmond

doi:10.1209/0295-5075/95/12001

Production of ultracold neutrons from cryogenic ²H₂, O₂, and C²H₄ converters

F. Atchison¹, B. Blau¹, K. Bodek², B. van den Brandt¹, T. Bryś¹, M. Daum¹, P. Fierlinger^1,3, P. Geltenbort⁴, P. Hautle¹, R. Henneck¹, S. Heule^1,3, A. Holley⁵, M. Kasprzak^1,6, K. Kirch¹, A. Knecht^1,3, J. A. Konter¹, M. Kuźniak^1,2, C.-Y. Liu⁷, A. Pichlmaier¹, C. Plonka⁴, Y. Pokotilovski⁸, A. Saunders⁹, D. Tortorella¹⁰, M. Wohlmuther¹, A. R. Young⁵, J. Zejma² and G. Zsigmond¹

Published 14 June 2011 • Europhysics Letters Association
Europhysics Letters, Volume 95, Number 1 Citation F. Atchison et al 2011 EPL 95 12001 DOI 10.1209/0295-5075/95/12001

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Author affiliations

¹ Paul Scherrer Institut (PSI) - CH-5232 Villigen PSI, Switzerland

² Institute of Physics, Jagiellonian University - Cracow, Poland, EU

³ Institute of Physics, University of Zürich - Switzerland

⁴ Institut Laue-Langevin (ILL) - Grenoble, France, EU

⁵ North Carolina State University - Raleigh, NC, USA

⁶ Stefan Meyer Institut for subatomic Physics, Austrian Academy of Sciences - Vienna, Austria, EU

⁷ Indiana University - Bloomington, IN, USA

⁸ Joint Institute for Nuclear Research - Dubna, Russia

⁹ Los Alamos National Laboratory - Los Alamos, NM, USA

¹⁰ Technical University München - München, Germany, EU

¹¹ Present address: University of Fribourg - Fribourg, Switzerland

¹² Also at ETH Zürich - Zürich, Switzerland

Dates

Received 26 November 2010
Accepted 11 May 2011
Published 14 June 2011

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Abstract

Ultracold neutrons (UCN) have been produced using the cold neutron (CN) beam FUNSPIN at SINQ on cryogenic oxygen (O₂), tetradeuteromethane (C²H₄), and deuterium (²H₂) targets. The target cell (40 mm long, fiducial volume about 45 cm³) was operated between room temperature and 8 K and UCN were produced from gaseous, liquid and solid targets. UCN rates have been measured as a convolution of UCN production and transport out of the target and to the detector. At least within the accessible temperature range of this experiment, deuterium outperforms the other materials.

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