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Optimisation of the scintillation light collection and uniformity for the SoLid experiment

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Abstract
This paper presents a comprehensive optimisation study to maximise the light collection efficiency of scintillating cube elements used in the SoLid detector. Very short baseline reactor experiments, like SoLid, look for active to sterile neutrino oscillation signatures in the anti-neutrino energy spectrum as a function of the distance to the core and energy. Performing a precise search requires high light yield of the scintillating elements and uniformity of the response in the detector volume. The SoLid experiment uses an innovative hybrid technology with two different scintillators: polyvinyltoluene scintillator cubes and (LiF)-Li-6:ZnS(Ag) screens. A precision test bench based on a Bi-207 calibration source has been developed to study improvements on the energy resolution and uniformity of the prompt scintillation signal of antineutrino interactions. A trigger system selecting the 1 MeV conversion electrons provides a Gaussian energy peak and allows for precise comparisons of the different detector configurations that were considered to improve the SoLid detector light collection. The light collection efficiency is influenced by the choice of wrapping material, the position of the 6LiF:ZnS(Ag) screen, the type of fibre, the number of optical fibres and the type of mirror at the end of the fibre. This study shows that large gains in light collection efficiency are possible compared to the SoLid SM1 prototype. The light yield for the SoLid detector is expected to be at least 52 +/- 2 photo-avalanches per MeV per cube, with a relative non-uniformity of 6 %, demonstrating that the required energy resolution of at least 14 % at 1 MeV can be achieved.
Keywords
Detector design and construction technologies and materials, Neutrino, detectors, Scintillators and scintillating fibres and light guides

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MLA
Abreu, Y., et al. “Optimisation of the Scintillation Light Collection and Uniformity for the SoLid Experiment.” JOURNAL OF INSTRUMENTATION, vol. 13, 2018.
APA
Abreu, Y., Amhis, Y., Beaumont, W., Bongrand, M., Boursette, D., Castle, B., … Yermia, F. (2018). Optimisation of the scintillation light collection and uniformity for the SoLid experiment. JOURNAL OF INSTRUMENTATION, 13.
Chicago author-date
Abreu, Y, Y Amhis, W Beaumont, M Bongrand, D Boursette, BC Castle, K Clark, et al. 2018. “Optimisation of the Scintillation Light Collection and Uniformity for the SoLid Experiment.” JOURNAL OF INSTRUMENTATION 13.
Chicago author-date (all authors)
Abreu, Y, Y Amhis, W Beaumont, M Bongrand, D Boursette, BC Castle, K Clark, B Coupe, D Cussans, A De Roeck, D Durand, M Fallot, L Ghys, L Giot, K Graves, B Guillon, D Henaff, B Hosseini, S Ihantola, S Jenzer, S Kalcheva, LN Kalousis, Mathieu Labare, G Lehaut, S Manley, L Manzanillas, J Mermans, Ianthe Michiels, Céline Moortgat, D Newbold, J Park, V Pestel, K Petridis, I Pinera, L Popescu, Dirk Ryckbosch, N Ryder, D Saunders, M-H Schune, M Settimo, L Simard, A Vacheret, Giel Vandierendonck, S Van Dyck, P Van Mulders, N Van Remortel, S Vercaemer, M Verstraeten, B Viaud, A Weber, and F Yermia. 2018. “Optimisation of the Scintillation Light Collection and Uniformity for the SoLid Experiment.” JOURNAL OF INSTRUMENTATION 13.
Vancouver
1.
Abreu Y, Amhis Y, Beaumont W, Bongrand M, Boursette D, Castle B, et al. Optimisation of the scintillation light collection and uniformity for the SoLid experiment. JOURNAL OF INSTRUMENTATION. 2018;13.
IEEE
[1]
Y. Abreu et al., “Optimisation of the scintillation light collection and uniformity for the SoLid experiment,” JOURNAL OF INSTRUMENTATION, vol. 13, 2018.
@article{8620603,
  abstract     = {This paper presents a comprehensive optimisation study to maximise the light collection efficiency of scintillating cube elements used in the SoLid detector. Very short baseline reactor experiments, like SoLid, look for active to sterile neutrino oscillation signatures in the anti-neutrino energy spectrum as a function of the distance to the core and energy. Performing a precise search requires high light yield of the scintillating elements and uniformity of the response in the detector volume. The SoLid experiment uses an innovative hybrid technology with two different scintillators: polyvinyltoluene scintillator cubes and (LiF)-Li-6:ZnS(Ag) screens. A precision test bench based on a Bi-207 calibration source has been developed to study improvements on the energy resolution and uniformity of the prompt scintillation signal of antineutrino interactions. A trigger system selecting the 1 MeV conversion electrons provides a Gaussian energy peak and allows for precise comparisons of the different detector configurations that were considered to improve the SoLid detector light collection. The light collection efficiency is influenced by the choice of wrapping material, the position of the 6LiF:ZnS(Ag) screen, the type of fibre, the number of optical fibres and the type of mirror at the end of the fibre. This study shows that large gains in light collection efficiency are possible compared to the SoLid SM1 prototype. The light yield for the SoLid detector is expected to be at least 52 +/- 2 photo-avalanches per MeV per cube, with a relative non-uniformity of 6 %, demonstrating that the required energy resolution of at least 14 % at 1 MeV can be achieved.},
  articleno    = {P09005},
  author       = {Abreu, Y and Amhis, Y and Beaumont, W and Bongrand, M and Boursette, D and Castle, BC and Clark, K and Coupe, B and Cussans, D and De Roeck, A and Durand, D and Fallot, M and Ghys, L and Giot, L and Graves, K and Guillon, B and Henaff, D and Hosseini, B and Ihantola, S and Jenzer, S and Kalcheva, S and Kalousis, LN and Labare, Mathieu and Lehaut, G and Manley, S and Manzanillas, L and Mermans, J and Michiels, Ianthe and Moortgat, Céline and Newbold, D and Park, J and Pestel, V and Petridis, K and Pinera, I and Popescu, L and Ryckbosch, Dirk and Ryder, N and Saunders, D and Schune, M-H and Settimo, M and Simard, L and Vacheret, A and Vandierendonck, Giel and Van Dyck, S and Van Mulders, P and Van Remortel, N and Vercaemer, S and Verstraeten, M and Viaud, B and Weber, A and Yermia, F},
  issn         = {1748-0221},
  journal      = {JOURNAL OF INSTRUMENTATION},
  keywords     = {Detector design and construction technologies and materials,Neutrino,detectors,Scintillators and scintillating fibres and light guides},
  language     = {eng},
  pages        = {26},
  title        = {Optimisation of the scintillation light collection and uniformity for the SoLid experiment},
  url          = {http://dx.doi.org/10.1088/1748-0221/13/09/P09005},
  volume       = {13},
  year         = {2018},
}

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