Magnetron-sputtered Be coatings as reflectors for ultracold neutrons

T. Bryś; M. Daum; P. Fierlinger; A. Fomin; P. Geltenbort; R. Henneck; K. Kirch; A. Kharitonov; I. Krasnoshekova; M. Kuźniak; M. Lasakov; A. Pichlmaier; F. Raimondi; R. Schelldorfer; A. Serebrov; E. Siber; R. Tal'daev; V. Varlamov; A. Vasiliev; J. Wambach; O. Zherebtsov

doi:10.1016/j.nima.2005.06.063

Magnetron-sputtered Be coatings as reflectors for ultracold neutrons

T. Bryś
, M. Daum
, P. Fierlinger
, A. Fomin
, P. Geltenbort
, R. Henneck
, K. Kirch
, A. Kharitonov
, I. Krasnoshekova
, M. Kuźniak
, M. Lasakov
, A. Pichlmaier
, F. Raimondi
, R. Schelldorfer
, A. Serebrov
, E. Siber
, R. Tal'daev
, V. Varlamov
, A. Vasiliev
, J. Wambach

O. Zherebtsov

Paul Scherrer Institut
ETH Zurich
University of Zurich
Petersburg Nuclear Phys. Inst.
Institut Laue-Langevin

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

9 Scopus citations

Abstract

We describe the production, characterization and performance of magnetron-sputtered Be coatings on aluminum, copper and stainless steel substrates. The coating thickness is typically 300 nm. Small samples were characterized by means of Optical Microscopy (OM), Atomic Force Microscopy (AFM) and X-ray induced Photoelectron Spectroscopy (XPS) and Elastic Recoil Detection Analysis (ERDA). The coating quality and adhesion following thermal cycling and neutron irradiation were tested with respect to future applications as storage containers in Ultracold Neutron (UCN) sources. The fractional uncoated area was determined to be 10^-4 to 10^-5 by OM and XPS. These results were confirmed by foil transmission measurements with UCN in the energy range 180 to 230 neV. The storage time of a 250 l Be-coated Cu container was determined for UCN energies up to 60 neV at room temperature and around 90 K and the wall loss factor η extracted. We obtained η (90 K)=2.7×10^-5 and η(300 K)=1.1×10^-4 in good agreement with previously published results.

Original language	English
Pages (from-to)	429-447
Number of pages	19
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	551
Issue number	2-3
DOIs	https://doi.org/10.1016/j.nima.2005.06.063
State	Published - 11 Oct 2005
Externally published	Yes

Keywords

Atomic force microscopy
Beryllium coating
Neutron reflectivity
Neutron transmission
Storage of ultracold neutrons
X-ray induced photoelectron spectroscopy

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10.1016/j.nima.2005.06.063

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Bryś, T., Daum, M., Fierlinger, P., Fomin, A., Geltenbort, P., Henneck, R., Kirch, K., Kharitonov, A., Krasnoshekova, I., Kuźniak, M., Lasakov, M., Pichlmaier, A., Raimondi, F., Schelldorfer, R., Serebrov, A., Siber, E., Tal'daev, R., Varlamov, V., Vasiliev, A., ... Zherebtsov, O. (2005). Magnetron-sputtered Be coatings as reflectors for ultracold neutrons. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 551(2-3), 429-447. https://doi.org/10.1016/j.nima.2005.06.063

@article{2e117a85c2414a42b411593a2c94e26b,

title = "Magnetron-sputtered Be coatings as reflectors for ultracold neutrons",

abstract = "We describe the production, characterization and performance of magnetron-sputtered Be coatings on aluminum, copper and stainless steel substrates. The coating thickness is typically 300 nm. Small samples were characterized by means of Optical Microscopy (OM), Atomic Force Microscopy (AFM) and X-ray induced Photoelectron Spectroscopy (XPS) and Elastic Recoil Detection Analysis (ERDA). The coating quality and adhesion following thermal cycling and neutron irradiation were tested with respect to future applications as storage containers in Ultracold Neutron (UCN) sources. The fractional uncoated area was determined to be 10-4 to 10-5 by OM and XPS. These results were confirmed by foil transmission measurements with UCN in the energy range 180 to 230 neV. The storage time of a 250 l Be-coated Cu container was determined for UCN energies up to 60 neV at room temperature and around 90 K and the wall loss factor η extracted. We obtained η (90 K)=2.7×10-5 and η(300 K)=1.1×10-4 in good agreement with previously published results.",

keywords = "Atomic force microscopy, Beryllium coating, Neutron reflectivity, Neutron transmission, Storage of ultracold neutrons, X-ray induced photoelectron spectroscopy",

author = "T. Bry{\'s} and M. Daum and P. Fierlinger and A. Fomin and P. Geltenbort and R. Henneck and K. Kirch and A. Kharitonov and I. Krasnoshekova and M. Ku{\'z}niak and M. Lasakov and A. Pichlmaier and F. Raimondi and R. Schelldorfer and A. Serebrov and E. Siber and R. Tal'daev and V. Varlamov and A. Vasiliev and J. Wambach and O. Zherebtsov",

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doi = "10.1016/j.nima.2005.06.063",

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Bryś, T, Daum, M, Fierlinger, P, Fomin, A, Geltenbort, P, Henneck, R, Kirch, K, Kharitonov, A, Krasnoshekova, I, Kuźniak, M, Lasakov, M, Pichlmaier, A, Raimondi, F, Schelldorfer, R, Serebrov, A, Siber, E, Tal'daev, R, Varlamov, V, Vasiliev, A, Wambach, J & Zherebtsov, O 2005, 'Magnetron-sputtered Be coatings as reflectors for ultracold neutrons', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 551, no. 2-3, pp. 429-447. https://doi.org/10.1016/j.nima.2005.06.063

TY - JOUR

T1 - Magnetron-sputtered Be coatings as reflectors for ultracold neutrons

AU - Bryś, T.

AU - Daum, M.

AU - Fierlinger, P.

AU - Fomin, A.

AU - Geltenbort, P.

AU - Henneck, R.

AU - Kirch, K.

AU - Kharitonov, A.

AU - Krasnoshekova, I.

AU - Kuźniak, M.

AU - Lasakov, M.

AU - Pichlmaier, A.

AU - Raimondi, F.

AU - Schelldorfer, R.

AU - Serebrov, A.

AU - Siber, E.

AU - Tal'daev, R.

AU - Varlamov, V.

AU - Vasiliev, A.

AU - Wambach, J.

AU - Zherebtsov, O.

PY - 2005/10/11

Y1 - 2005/10/11

N2 - We describe the production, characterization and performance of magnetron-sputtered Be coatings on aluminum, copper and stainless steel substrates. The coating thickness is typically 300 nm. Small samples were characterized by means of Optical Microscopy (OM), Atomic Force Microscopy (AFM) and X-ray induced Photoelectron Spectroscopy (XPS) and Elastic Recoil Detection Analysis (ERDA). The coating quality and adhesion following thermal cycling and neutron irradiation were tested with respect to future applications as storage containers in Ultracold Neutron (UCN) sources. The fractional uncoated area was determined to be 10-4 to 10-5 by OM and XPS. These results were confirmed by foil transmission measurements with UCN in the energy range 180 to 230 neV. The storage time of a 250 l Be-coated Cu container was determined for UCN energies up to 60 neV at room temperature and around 90 K and the wall loss factor η extracted. We obtained η (90 K)=2.7×10-5 and η(300 K)=1.1×10-4 in good agreement with previously published results.

AB - We describe the production, characterization and performance of magnetron-sputtered Be coatings on aluminum, copper and stainless steel substrates. The coating thickness is typically 300 nm. Small samples were characterized by means of Optical Microscopy (OM), Atomic Force Microscopy (AFM) and X-ray induced Photoelectron Spectroscopy (XPS) and Elastic Recoil Detection Analysis (ERDA). The coating quality and adhesion following thermal cycling and neutron irradiation were tested with respect to future applications as storage containers in Ultracold Neutron (UCN) sources. The fractional uncoated area was determined to be 10-4 to 10-5 by OM and XPS. These results were confirmed by foil transmission measurements with UCN in the energy range 180 to 230 neV. The storage time of a 250 l Be-coated Cu container was determined for UCN energies up to 60 neV at room temperature and around 90 K and the wall loss factor η extracted. We obtained η (90 K)=2.7×10-5 and η(300 K)=1.1×10-4 in good agreement with previously published results.

KW - Atomic force microscopy

KW - Beryllium coating

KW - Neutron reflectivity

KW - Neutron transmission

KW - Storage of ultracold neutrons

KW - X-ray induced photoelectron spectroscopy

UR - https://www.scopus.com/pages/publications/25844461276

U2 - 10.1016/j.nima.2005.06.063

DO - 10.1016/j.nima.2005.06.063

M3 - Article

AN - SCOPUS:25844461276

SN - 0168-9002

VL - 551

SP - 429

EP - 447

JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

IS - 2-3

ER -

Magnetron-sputtered Be coatings as reflectors for ultracold neutrons

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Keywords

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