A new facility for fundamental particle physics: The high-intensity ultracold neutron source at the Paul Scherrer Institute

Lauss, B.

doi:10.1063/1.3700622

Cited by 27 publications

(17 citation statements)

References 4 publications

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“…The experiment was performed at the beam line PF2/EDM [79,80] of the Institut Laue-Langevin (ILL) in Grenoble, France, and at the UCN source at the Paul Scherrer Institute in Villigen, Switzerland [15][16][17][18]. The vacuum in the sample tubes was typically 1 × 10 −6 mbar.…”

Section: Data Collectionmentioning

confidence: 99%

“…(1) The total number of neutrons, which is permanently increased by improving the intensity of the present source of ultracold neutrons (UCN) 1 at PSI [15][16][17][18][19]. This source is based on a very cold moderator-converter using solid deuterium (sD 2 ) [20][21][22][23][24][25][26][27][28][29][30][31][32][33] at a temperature around 5 K. (4) The initial polarization of the neutrons, which is increased to ∼100% by means of a superconductive solenoid with a field of 5 T [34].…”

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confidence: 99%

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Losses and depolarization of ultracold neutrons on neutron guide and storage materials

et al. 2017

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At Institut Laue-Langevin (ILL) and Paul Scherrer Institute (PSI), we have measured the losses and depolarization probabilities of ultracold neutrons on various materials: (i) nickel-molybdenum alloys with weight percentages of 82/18, 85/15, 88/12, 91/9, and 94/6 and natural nickel Ni100, (ii) nickel-vanadium NiV93/7, (iii) copper, and (iv) deuterated polystyrene (dPS). For the different samples, storage-time constants up to ∼460 s were obtained at room temperature. The corresponding loss parameters for ultracold neutrons, η, varied between 1.0 × 10 −4 and 2.2 × 10 −4 . All η values are in agreement with theory except for dPS, where anomalous losses at room temperature were established with four standard deviations. The depolarization probabilities per wall collision β measured with unprecedented sensitivity varied between 0.7 × 10 −6 and 9.0 × 10 −6 . Our depolarization result for copper differs from other experiments by 4.4 and 15.8 standard deviations. The β values of the paramagnetic NiMo alloys over molybdenum content show an increase of β with increasing Mo content. This is in disagreement with expectations from literature. Finally, ferromagnetic behavior of NiMo alloys at room temperature was found for molybdenum contents of 6.5 at.% or less and paramagnetic behavior for more than 8.7 at.%. This may contribute to solving an ambiguity in literature.

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Section: Data Collectionmentioning

confidence: 99%

mentioning

confidence: 99%

Losses and depolarization of ultracold neutrons on neutron guide and storage materials

et al. 2017

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“…At the Paul Scherrer Institute (PSI), Villigen, Switzerland a new UCN source was constructed and has been in operation since 2011 [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

An ultracold neutron storage bottle for UCN density measurements

Bison

Burri

Daum

et al. 2016

Nuclear Instruments and Methods in Physics Research Section A:

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“…Finally the detector's sensitivity to backgrounds, needs to be well known or measurable during periods without UCN. In order to determine the detector's performance, the detector has been benchmarked against a Cascade UCN detector [1] using the UCN source at the Paul Scherrer Institute (PSI) in Switzerland [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Characterization of a scintillating lithium glass ultra-cold neutron detector

et al. 2017

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A6 Li glass based scintillation detector developed for the TRIUMF neutron electric dipole moment experiment was characterized using the ultra-cold neutron source at the Paul Scherrer Institute (PSI). The data acquisition system for this detector was demonstrated to perform well at rejecting backgrounds. An estimate of the absolute efficiency of background rejection of 99.7 ± 0.1% is made. For variable ultra-cold neutron rate (varying from < 1 kHz to approx. 100 kHz per channel) and background rate seen at the Paul Scherrer Institute, we estimate that the absolute detector efficiency is 89.7 +1.3 −1.9 %. Finally a comparison with a commercial Cascade detector was performed for a specific setup at the West-2 beamline of the ultra-cold neutron source at PSI.

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A new facility for fundamental particle physics: The high-intensity ultracold neutron source at the Paul Scherrer Institute

Cited by 27 publications

References 4 publications

Losses and depolarization of ultracold neutrons on neutron guide and storage materials

Losses and depolarization of ultracold neutrons on neutron guide and storage materials

An ultracold neutron storage bottle for UCN density measurements

Characterization of a scintillating lithium glass ultra-cold neutron detector

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