First ultracold neutrons produced at TRIUMF

TUCAN Collaboration

doi:10.1103/PhysRevC.99.025503

First ultracold neutrons produced at TRIUMF

TUCAN Collaboration

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

26 Scopus citations

Abstract

We installed a source for ultracold neutrons at a new, dedicated spallation target at TRIUMF. The source was originally developed in Japan and uses a superfluid-helium converter cooled to 0.9K. During an extensive test campaign in November 2017, we extracted up to 325000 ultracold neutrons after a one-minute irradiation of the target, over three times more than previously achieved with this source. The corresponding ultracold-neutron density in the whole production and guide volume is 5.3cm-3. The storage lifetime of ultracold neutrons in the source was initially 37 s and dropped to 24 s during the 18 days of operation. During continuous irradiation of the spallation target, we were able to detect a sustained ultracold-neutron rate of up to 1500s-1. Simulations of UCN production, UCN transport, temperature-dependent UCN yield, and temperature-dependent storage lifetime show excellent agreement with the experimental data and confirm that the ultracold-neutron-upscattering rate in superfluid helium is proportional to T7.

Original language	English
Article number	025503
Journal	Physical Review C
Volume	99
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevC.99.025503
State	Published - Feb 27 2019
Externally published	Yes

Funding

We would like to thank B. Hitti and C. Dick for supplying us with liquid helium; C. Marshall, T. Hessels, and S. Horn for engineering support; C. Remon, D. Morris, and the TRIUMF Controls Group for support with controls and DAQ; and the TRIUMF Operations Group for delivering beam to the spallation target. This work was supported by the Canada Foundation for Innovation (CFI), the Canada Research Chairs program, the Japan Society for the Promotion of Science (JSPS), the Natural Sciences and Engineering Research Council of Canada (NSERC), and Research Manitoba. Computations were performed on the Cedar supercomputer of WestGrid and Compute Canada.

Funders	Funder number
Canada Foundation for Innovation
Japan Society for the Promotion of Science
Natural Sciences and Engineering Research Council of Canada
Natural Sciences and Engineering Research Council of Canada
Canada Foundation for Innovation
Japan Society for the Promotion of Science
Canada Research Chairs

Access to Document

10.1103/PhysRevC.99.025503

Cite this

@article{33cde696f90249588a2b4c373811c07f,

title = "First ultracold neutrons produced at TRIUMF",

abstract = "We installed a source for ultracold neutrons at a new, dedicated spallation target at TRIUMF. The source was originally developed in Japan and uses a superfluid-helium converter cooled to 0.9K. During an extensive test campaign in November 2017, we extracted up to 325000 ultracold neutrons after a one-minute irradiation of the target, over three times more than previously achieved with this source. The corresponding ultracold-neutron density in the whole production and guide volume is 5.3cm-3. The storage lifetime of ultracold neutrons in the source was initially 37 s and dropped to 24 s during the 18 days of operation. During continuous irradiation of the spallation target, we were able to detect a sustained ultracold-neutron rate of up to 1500s-1. Simulations of UCN production, UCN transport, temperature-dependent UCN yield, and temperature-dependent storage lifetime show excellent agreement with the experimental data and confirm that the ultracold-neutron-upscattering rate in superfluid helium is proportional to T7.",

author = "{TUCAN Collaboration} and S. Ahmed and E. Altiere and T. Andalib and B. Bell and Bidinosti, {C. P.} and E. Cudmore and M. Das and Davis, {C. A.} and B. Franke and M. Gericke and P. Giampa and P. Gnyp and S. Hansen-Romu and K. Hatanaka and T. Hayamizu and B. Jamieson and D. Jones and S. Kawasaki and T. Kikawa and M. Kitaguchi and W. Klassen and A. Konaka and E. Korkmaz and F. Kuchler and M. Lang and L. Lee and T. Lindner and Madison, {K. W.} and Y. Makida and J. Mammei and R. Mammei and Martin, {J. W.} and R. Matsumiya and E. Miller and K. Mishima and T. Momose and T. Okamura and S. Page and R. Picker and E. Pierre and Ramsay, {W. D.} and L. Rebenitsch and F. Rehm and W. Schreyer and Shimizu, {H. M.} and S. Sidhu and A. Sikora and J. Smith and I. Tanihata and B. Thorsteinson",

note = "Publisher Copyright: {\textcopyright} 2019 American Physical Society.",

year = "2019",

month = feb,

day = "27",

doi = "10.1103/PhysRevC.99.025503",

language = "English",

volume = "99",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "2",

}

TY - JOUR

T1 - First ultracold neutrons produced at TRIUMF

AU - TUCAN Collaboration

AU - Ahmed, S.

AU - Altiere, E.

AU - Andalib, T.

AU - Bell, B.

AU - Bidinosti, C. P.

AU - Cudmore, E.

AU - Das, M.

AU - Davis, C. A.

AU - Franke, B.

AU - Gericke, M.

AU - Giampa, P.

AU - Gnyp, P.

AU - Hansen-Romu, S.

AU - Hatanaka, K.

AU - Hayamizu, T.

AU - Jamieson, B.

AU - Jones, D.

AU - Kawasaki, S.

AU - Kikawa, T.

AU - Kitaguchi, M.

AU - Klassen, W.

AU - Konaka, A.

AU - Korkmaz, E.

AU - Kuchler, F.

AU - Lang, M.

AU - Lee, L.

AU - Lindner, T.

AU - Madison, K. W.

AU - Makida, Y.

AU - Mammei, J.

AU - Mammei, R.

AU - Martin, J. W.

AU - Matsumiya, R.

AU - Miller, E.

AU - Mishima, K.

AU - Momose, T.

AU - Okamura, T.

AU - Page, S.

AU - Picker, R.

AU - Pierre, E.

AU - Ramsay, W. D.

AU - Rebenitsch, L.

AU - Rehm, F.

AU - Schreyer, W.

AU - Shimizu, H. M.

AU - Sidhu, S.

AU - Sikora, A.

AU - Smith, J.

AU - Tanihata, I.

AU - Thorsteinson, B.

PY - 2019/2/27

Y1 - 2019/2/27

N2 - We installed a source for ultracold neutrons at a new, dedicated spallation target at TRIUMF. The source was originally developed in Japan and uses a superfluid-helium converter cooled to 0.9K. During an extensive test campaign in November 2017, we extracted up to 325000 ultracold neutrons after a one-minute irradiation of the target, over three times more than previously achieved with this source. The corresponding ultracold-neutron density in the whole production and guide volume is 5.3cm-3. The storage lifetime of ultracold neutrons in the source was initially 37 s and dropped to 24 s during the 18 days of operation. During continuous irradiation of the spallation target, we were able to detect a sustained ultracold-neutron rate of up to 1500s-1. Simulations of UCN production, UCN transport, temperature-dependent UCN yield, and temperature-dependent storage lifetime show excellent agreement with the experimental data and confirm that the ultracold-neutron-upscattering rate in superfluid helium is proportional to T7.

AB - We installed a source for ultracold neutrons at a new, dedicated spallation target at TRIUMF. The source was originally developed in Japan and uses a superfluid-helium converter cooled to 0.9K. During an extensive test campaign in November 2017, we extracted up to 325000 ultracold neutrons after a one-minute irradiation of the target, over three times more than previously achieved with this source. The corresponding ultracold-neutron density in the whole production and guide volume is 5.3cm-3. The storage lifetime of ultracold neutrons in the source was initially 37 s and dropped to 24 s during the 18 days of operation. During continuous irradiation of the spallation target, we were able to detect a sustained ultracold-neutron rate of up to 1500s-1. Simulations of UCN production, UCN transport, temperature-dependent UCN yield, and temperature-dependent storage lifetime show excellent agreement with the experimental data and confirm that the ultracold-neutron-upscattering rate in superfluid helium is proportional to T7.

UR - http://www.scopus.com/inward/record.url?scp=85062456444&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.99.025503

DO - 10.1103/PhysRevC.99.025503

M3 - Article

AN - SCOPUS:85062456444

SN - 2469-9985

VL - 99

JO - Physical Review C

JF - Physical Review C

IS - 2

M1 - 025503

ER -

First ultracold neutrons produced at TRIUMF

Abstract

Funding

Access to Document

Other files and links

Fingerprint

Cite this