A method for evaluating the transmission properties of ultracold-neutron guides

I. Altarev; A. Frei; P. Geltenbort; E. Gutsmiedl; F. J. Hartmann; A. R. Müller; S. Paul; C. Plonka; D. Tortorella

doi:10.1016/j.nima.2006.09.104

A method for evaluating the transmission properties of ultracold-neutron guides

I. Altarev, A. Frei, P. Geltenbort, E. Gutsmiedl, F. J. Hartmann, A. R. Müller, S. Paul, C. Plonka, D. Tortorella

Chair of Physics I

Technical University of Munich

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

A method for evaluating the properties of guides for ultracold neutrons (UCN) has been developed as an extension of the common technique for measuring UCN losses in the sample contained between two diaphragms. With two measurements at both ends of the guide one can evaluate both, the loss probability μ per wall collision and the probability f for diffuse scattering from the wall. A 3.4 m long aluminum tube coated with a double layer of stainless steel (thickness 500 nm) and beryllium (thickness 250 nm), proposed as a UCN guide for the Mini-D₂ UCN source at the FRM-II reactor at Garching, was tested. We obtained μ = (1.1 ± 0.1) × 10^{- 3} and f = 0.18 ± 0.04. Systematic errors and a possible improvement of the method are discussed.

Original language	English
Pages (from-to)	101-106
Number of pages	6
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	570
Issue number	1
DOIs	https://doi.org/10.1016/j.nima.2006.09.104
State	Published - 1 Jan 2007

Keywords

Neutron guide
UCN
Ultracold neutrons

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10.1016/j.nima.2006.09.104

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Altarev, I., Frei, A., Geltenbort, P., Gutsmiedl, E., Hartmann, F. J., Müller, A. R., Paul, S., Plonka, C., & Tortorella, D. (2007). A method for evaluating the transmission properties of ultracold-neutron guides. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 570(1), 101-106. https://doi.org/10.1016/j.nima.2006.09.104

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abstract = "A method for evaluating the properties of guides for ultracold neutrons (UCN) has been developed as an extension of the common technique for measuring UCN losses in the sample contained between two diaphragms. With two measurements at both ends of the guide one can evaluate both, the loss probability μ per wall collision and the probability f for diffuse scattering from the wall. A 3.4 m long aluminum tube coated with a double layer of stainless steel (thickness 500 nm) and beryllium (thickness 250 nm), proposed as a UCN guide for the Mini-D2 UCN source at the FRM-II reactor at Garching, was tested. We obtained μ = (1.1 ± 0.1) × 10- 3 and f = 0.18 ± 0.04. Systematic errors and a possible improvement of the method are discussed.",

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Altarev, I, Frei, A, Geltenbort, P, Gutsmiedl, E, Hartmann, FJ, Müller, AR, Paul, S, Plonka, C & Tortorella, D 2007, 'A method for evaluating the transmission properties of ultracold-neutron guides', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 570, no. 1, pp. 101-106. https://doi.org/10.1016/j.nima.2006.09.104

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AU - Altarev, I.

AU - Frei, A.

AU - Geltenbort, P.

AU - Gutsmiedl, E.

AU - Hartmann, F. J.

AU - Müller, A. R.

AU - Paul, S.

AU - Plonka, C.

AU - Tortorella, D.

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AB - A method for evaluating the properties of guides for ultracold neutrons (UCN) has been developed as an extension of the common technique for measuring UCN losses in the sample contained between two diaphragms. With two measurements at both ends of the guide one can evaluate both, the loss probability μ per wall collision and the probability f for diffuse scattering from the wall. A 3.4 m long aluminum tube coated with a double layer of stainless steel (thickness 500 nm) and beryllium (thickness 250 nm), proposed as a UCN guide for the Mini-D2 UCN source at the FRM-II reactor at Garching, was tested. We obtained μ = (1.1 ± 0.1) × 10- 3 and f = 0.18 ± 0.04. Systematic errors and a possible improvement of the method are discussed.

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A method for evaluating the transmission properties of ultracold-neutron guides

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