Search

Your search keyword '"Blake I"' showing total 14 results
Start Over Author "Blake I" Publication Type Reports
14 results on '"Blake I"'

1. PLUMED Tutorials: a collaborative, community-driven learning ecosystem

Author

Tribello, Gareth A., Bonomi, Massimiliano, Bussi, Giovanni, Camilloni, Carlo, Armstrong, Blake I., Arsiccio, Andrea, Aureli, Simone, Ballabio, Federico, Bernetti, Mattia, Bonati, Luigi, Brookes, Samuel G. H., Brotzakis, Z. Faidon, Capelli, Riccardo, Ceriotti, Michele, Chan, Kam-Tung, Cossio, Pilar, Dasetty, Siva, Donadio, Davide, Ensing, Bernd, Ferguson, Andrew L., Fraux, Guillaume, Gale, Julian D., Gervasio, Francesco Luigi, Giorgino, Toni, Herringer, Nicholas S. M., Hocky, Glen M., Hoff, Samuel E., Invernizzi, Michele, Languin-Cattöen, Olivier, Leone, Vanessa, Limongelli, Vittorio, Lopez-Acevedo, Olga, Marinelli, Fabrizio, Martinez, Pedro Febrer, Masetti, Matteo, Mehdi, Shams, Michaelides, Angelos, Murtada, Mhd Hussein, Parrinello, Michele, Piaggi, Pablo M., Pietropaolo, Adriana, Pietrucci, Fabio, Pipolo, Silvio, Pritchard, Claire, Raiteri, Paolo, Raniolo, Stefano, Rapetti, Daniele, Rizzi, Valerio, Rydzewski, Jakub, Salvalaglio, Matteo, Schran, Christoph, Seal, Aniruddha, Zadeh, Armin Shayesteh, Silva, Tomás F. D., Spiwok, Vojtěch, Stirnemann, Guillaume, Sucerquia, Daniel, Tiwary, Pratyush, Valsson, Omar, Vendruscolo, Michele, Voth, Gregory A., White, Andrew D., and Wu, Jiangbo

Subjects
Physics - Physics Education, Physics - Chemical Physics, Physics - Computational Physics
Abstract

In computational physics, chemistry, and biology, the implementation of new techniques in a shared and open source software lowers barriers to entry and promotes rapid scientific progress. However, effectively training new software users presents several challenges. Common methods like direct knowledge transfer and in-person workshops are limited in reach and comprehensiveness. Furthermore, while the COVID-19 pandemic highlighted the benefits of online training, traditional online tutorials can quickly become outdated and may not cover all the software's functionalities. To address these issues, here we introduce ``PLUMED Tutorials'', a collaborative model for developing, sharing, and updating online tutorials. This initiative utilizes repository management and continuous integration to ensure compatibility with software updates. Moreover, the tutorials are interconnected to form a structured learning path and are enriched with automatic annotations to provide broader context. This paper illustrates the development, features, and advantages of PLUMED Tutorials, aiming to foster an open community for creating and sharing educational resources., Comment: 26 pages, 5 figures

Published
2024

2. Initial measurement of reactor antineutrino oscillation at SNO+

Author

Collaboration, SNO, Allega, A., Anderson, M. R., Andringa, S., Askins, M., Asner, D. M., Auty, D. J., Bacon, A., Baker, J., Barão, F., Barros, N., Bayes, R., Beier, E. W., Bezerra, T. S., Bialek, A., Biller, S. D., Blucher, E., Caden, E., Callaghan, E. J., Chen, M., Cheng, S., Cleveland, B., Cookman, D., Corning, J., Cox, M. A., Dehghani, R., Deloye, J., Depatie, M. M., Di Lodovico, F., Dima, C., Dittmer, J., Dixon, K. H., Esmaeilian, M. S., Falk, E., Fatemighomi, N., Ford, R., Gaur, A., González-Reina, O. I., Gooding, D., Grant, C., Grove, J., Hall, S., Hallin, A. L., Hallman, D., Heintzelman, W. J., Helmer, R. L., Hewitt, C., Howard, V., Hreljac, B., Hu, J., Huang, P., Hunt-Stokes, R., Hussain, S. M. A., Inácio, A. S., Jillings, C. J., Kaluzienski, S., Kaptanoglu, T., Khan, H., Kladnik, J., Klein, J. R., Kormos, L. L., Krar, B., Kraus, C., Krauss, C. B., Kroupová, T., Lake, C., Lebanowski, L., Lefebvre, C., Lozza, V., Luo, M., Maio, A., Manecki, S., Maneira, J., Martin, R. D., McCauley, N., McDonald, A. B., Mills, C., Milton, G., Colina, A. Molina, Morris, D., Morton-Blake, I., Mubasher, M., Naugle, S., Nolan, L. J., O'Keeffe, H. M., Gann, G. D. Orebi, Page, J., Paleshi, K., Parker, W., Paton, J., Peeters, S. J. M., Pickard, L., Quenallata, B., Ravi, P., Reichold, A., Riccetto, S., Rose, J., Rosero, R., Semenec, I., Simms, J., Skensved, P., Smiley, M., Smith, J., Svoboda, R., Tam, B., Tseng, J., Vázquez-Jáuregui, E., Veinot, J. G. C., Virtue, C. J., Ward, M., Weigand, J. J., Wilson, J. R., Wilson, J. D., Wright, A., Yang, S., Yeh, M., Ye, Z., Yu, S., Zhang, Y., Zuber, K., and Zummo, A.

Subjects
High Energy Physics - Experiment, Nuclear Experiment
Abstract

The SNO+ collaboration reports its first spectral analysis of long-baseline reactor antineutrino oscillation using 114 tonne-years of data. Fitting the neutrino oscillation probability to the observed energy spectrum yields constraints on the neutrino mass-squared difference $\Delta m^2_{21}$. In the ranges allowed by previous measurements, the best-fit $\Delta m^2_{21}$ is (8.85$^{+1.10}_{-1.33}$) $\times$ 10$^{-5}$ eV$^2$. This measurement is continuing in the next phases of SNO+ and is expected to surpass the present global precision on $\Delta m^2_{21}$ with about three years of data.

Published
2024
Full Text
View/download PDF

3. Event-by-Event Direction Reconstruction of Solar Neutrinos in a High Light-Yield Liquid Scintillator

Author

Allega, A., Anderson, M. R., Andringa, S., Antunes, J., Askins, M., Auty, D. J., Bacon, A., Baker, J., Barros, N., Barão, F., Bayes, R., Beier, E. W., Bezerra, T. S., Bialek, A., Biller, S. D., Blucher, E., Caden, E., Callaghan, E. J., Chen, M., Cheng, S., Cleveland, B., Cookman, D., Corning, J., Cox, M. A., Dehghani, R., Deloye, J., Depatie, M. M., Di Lodovico, F., Dittmer, J., Dixon, K. H., Falk, E., Fatemighomi, N., Ford, R., Gaur, A., Ganzálaz-Reina, O. I., Gooding, D., Grant, C., Grove, J., Hall, S., Hallin, A. L., Heintzelman, W. J., Helmer, R. L., Hewitt, C., Hreljac, B., Howard, V., Hu, J., Hunt-Stokes, R., Hussain, S. M. A., Inácio, A. S., Jillings, C. J., Kaluzienski, S., Kaptanoglu, T., Khaghani, P., Khan, H., Klein, J. R., Kormos, L. L., Krar, B., Kraus, C., Krauss, C. B., Kroupová, T., Lake, C., Lebanowski, L., Lee, J., Lefebvra, C., Lin, Y. H., Lozza, V., Luo, M., Maio, A., Manecki, S., Maneira, J., Martin, R. D., McCauley, N., McDonald, A. B., Mills, C., Milton, G., Morton-Blake, I., Mubasher, M., Colina, A. Molina, Morris, D., Naugle, S., Nolan, L. J., O'Keeffe, H. M., Gann, G. D. Orebi, Page, J., Paleshi, K., Parker, W., Paton, J., Peeters, S. J. M., Pickard, L., Ravi, P., Reichold, A., Riccetto, S., Rigan, M., Rose, J., Rosero, R., Rumleskie, J., Semenec, I., Skensvard, P., Smiley, M., Smith, J., Svoboda, R., Tam, B., Tseng, J., Valder, S., Vázquez-Jáuregui, E., Virtue, C. J., Wang, J., Ward, M., Wilson, J. R., Wilson, J. D., Wright, A., Yanez, J. P., Yang, S., Yeh, M., Ye, Z., Yu, S., Zhang, Y., Zuber, K., and Zummo, A.

Subjects
High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract

The direction of individual $^8$B solar neutrinos has been reconstructed using the SNO+ liquid scintillator detector. Prompt, directional Cherenkov light was separated from the slower, isotropic scintillation light using time information, and a maximum likelihood method was used to reconstruct the direction of individual scattered electrons. A clear directional signal was observed, correlated with the solar angle. The observation was aided by a period of low primary fluor concentration that resulted in a slower scintillator decay time. This is the first time that event-by-event direction reconstruction in high light-yield liquid scintillator has been demonstrated in a large-scale detector., Comment: 6 pages, 6 figures. Accepted manuscript by PRD

Published
2023
Full Text
View/download PDF

4. Evidence of Antineutrinos from Distant Reactors using Pure Water at SNO+

Author

Collaboration, SNO, Allega, A., Anderson, M. R., Andringa, S., Antunes, J., Askins, M., Auty, D. J., Bacon, A., Barros, N., Barao, F., Bayes, R., Beier, E. W., Bezerra, T. S., Bialek, A., Biller, S. D., Blucher, E., Caden, E., Callaghan, E. J., Cheng, S., Chen, M., Cleveland, B., Cookman, D., Corning, J., Cox, M. A., Dehghani, R., Deloye, J., Deluce, C., Depatie, M. M., Dittmer, J., Dixon, K. H., Di Lodovico, F., Falk, E., Fatemighomi, N., Ford, R., Frankiewicz, K., Gaur, A., Gonzalez-Reina, O. I., Gooding, D., Grant, C., Grove, J., Hallin, A. L., Hallman, D., Heintzelman, W. J., Helmer, R. L., Hu, J., Hunt-Stokes, R., Hussain, S. M. A., Inacio, A. S., Jillings, C. J., Kaluzienski, S., Kaptanoglu, T., Khaghani, P., Khan, H., Klein, J. R., Kormos, L. L., Krar, B., Kraus, C., Krauss, C. B., Kroupova, T., Lam, I., Land, B. J., Lawson, I., Lebanowski, L., Lee, J., Lefebvre, C., Lidgard, J., Lin, Y. H., Lozza, V., Luo, M., Maio, A., Manecki, S., Maneira, J., Martin, R. D., McCauley, N., McDonald, A. B., Mills, C., Morton-Blake, I., Naugle, S., Nolan, L. J., O'Keeffe, H. M., Gann, G. D. Orebi, Page, J., Parker, W., Paton, J., Peeters, S. J. M., Pickard, L., Ravi, P., Reichold, A., Riccetto, S., Richardson, R., Rigan, M., Rose, J., Rosero, R., Rumleskie, J., Semenec, I., Skensved, P., Smiley, M., Svoboda, R., Tam, B., Tseng, J., Turner, E., Valder, S., Virtue, C. J., Vazquez-Jauregui, E., Wang, J., Ward, M., Wilson, J. R., Wilson, J. D., Wright, A., Yanez, J. P., Yang, S., Yeh, M., Yu, S., Zhang, Y., Zuber, K., and Zummo, A.

Subjects
Nuclear Experiment, High Energy Physics - Experiment
Abstract

The SNO+ Collaboration reports the first evidence of reactor antineutrinos in a Cherenkov detector. The nearest nuclear reactors are located 240~km away in Ontario, Canada. This analysis uses events with energies lower than in any previous analysis with a large water Cherenkov detector. Two analytical methods are used to distinguish reactor antineutrinos from background events in 190 days of data and yield consistent evidence for antineutrinos with a combined significance of 3.5$\sigma$., Comment: v2: add missing author, add link to supplemental material v3: minor updates to match PRL publication

Published
2022
Full Text
View/download PDF

5. A multi-cubic-kilometre neutrino telescope in the western Pacific Ocean

Author

Ye, Z. P., Hu, F., Tian, W., Chang, Q. C., Chang, Y. L., Cheng, Z. S., Gao, J., Ge, T., Gong, G. H., Guo, J., Guo, X. X., He, X. G., Huang, J. T., Jiang, K., Jiang, P. K., Jing, Y. P., Li, H. L., Li, J. L., Li, L., Li, W. L., Li, Z., Liao, N. Y., Lin, Q., Liu, F., Liu, J. L., Liu, X. H., Miao, P., Mo, C., Morton-Blake, I., Peng, T., Sun, Z. Y., Tang, J. N., Tang, Z. B., Tao, C. H., Tian, X. L., Wang, M. X., Wang, Y., Wei, H. D., Wei, Z. Y., Wu, W. H., Xian, S. S., Xiang, D., Xu, D. L., Xue, Q., Yang, J. H., Yang, J. M., Yu, W. B., Zeng, C., Zhang, F. Y. D., Zhang, T., Zhang, X. T., Zhang, Y. Y., Zhi, W., Zhong, Y. S., Zhou, M., Zhu, X. H., and Zhuang, G. J.

Subjects
Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics, High Energy Physics - Experiment
Abstract

Next-generation neutrino telescopes with significantly improved sensitivity are required to pinpoint the sources of the diffuse astrophysical neutrino flux detected by IceCube and uncover the century-old puzzle of cosmic ray origins. A detector near the equator will provide a unique viewpoint of the neutrino sky, complementing IceCube and other neutrino telescopes in the Northern Hemisphere. Here we present results from an expedition to the north-eastern region of the South China Sea, in the western Pacific Ocean. A favorable neutrino telescope site was found on an abyssal plain at a depth of $\sim$ 3.5km. At depths below 3km, the sea current speed, water absorption and scattering lengths for Cherenkov light, were measured to be $v_{\mathrm{c}}<$10cm/s, $\lambda_{\mathrm{abs} }\simeq$ 27m and $\lambda_{\mathrm{sca} }\simeq$ 63m, respectively. Accounting for these measurements, we present the design and expected performance of a next-generation neutrino telescope, TRopIcal DEep-sea Neutrino Telescope (TRIDENT). With its advanced photon-detection technology and large dimensions, TRIDENT expects to observe the IceCube steady source candidate NGC 1068 with 5$\sigma$ significance within 1 year of operation. This level of sensitivity will open a new arena for diagnosing the origin of cosmic rays and probing fundamental physics over astronomical baselines., Comment: 34 pages,12 figures. Correspondence should be addressed to D. L. Xu: donglianxu@sjtu.edu.cn

Published
2022

6. Improved search for invisible modes of nucleon decay in water with the SNO+ detector

Author

Collaboration, SNO, Allega, A., Anderson, M. R., Andringa, S., Askins, M., Auty, D. J., Bacon, A., Barros, N., Barão, F., Bayes, R., Beier, E. W., Bezerra, T. S., Bialek, A., Biller, S. D., Blucher, E., Caden, E., Callaghan, E. J., Cheng, S., Chen, M., Chkvorets, O., Cleveland, B., Cookman, D., Corning, J., Cox, M. A., Dehghani, R., Deluce, C., Depatie, M. M., Dittmer, J., Dixon, K. H., Di Lodovico, F., Falk, E., Fatemighomi, N., Ford, R., Frankiewicz, K., Gaur, A., González-Reina, O. I., Gooding, D., Grant, C., Grove, J., Hallin, A. L., Hallman, D., Hartnell, J., Heintzelman, W. J., Helmer, R. L., Hu, J., Hunt-Stokes, R., Hussain, S. M. A., Inácio, A. S., Jillings, C. J., Kaptanoglu, T., Khaghani, P., Khan, H., Klein, J. R., Kormos, L. L., Krar, B., Kraus, C., Krauss, C. B., Kroupová, T., Lam, I., Land, B. J., Lawson, I., Lebanowski, L., Lee, J., Lefebvre, C., Lidgard, J., Lin, Y. H., Lozza, V., Luo, M., Maio, A., Manecki, S., Maneira, J., Martin, R. D., McCauley, N., McDonald, A. B., Meyer, M., Mills, C., Morton-Blake, I., Naugle, S., Nolan, L. J., O'Keeffe, H. M., Gann, G. D. Orebi, Page, J., Parker, W., Paton, J., Peeters, S. J. M., Pickard, L., Ravi, P., Reichold, A., Riccetto, S., Richardson, R., Rigan, M., Rose, J., Rumleskie, J., Semenec, I., Skensved, P., Smiley, M., Svoboda, R., Tam, B., Tseng, J., Turner, E., Valder, S., Veinot, J. G. C., Virtue, C. J., Vázquez-Jáuregui, E., Wang, J., Ward, M., Weigand, J. J., Wilson, J. D., Wilson, J. R., Wright, A., Yanez, J. P., Yang, S., Yeh, M., Yu, S., Zhang, T., Zhang, Y., Zuber, K., and Zummo, A.

Subjects
High Energy Physics - Experiment
Abstract

This paper reports results from a search for single and multi-nucleon disappearance from the $^{16}$O nucleus in water within the \snoplus{} detector using all of the available data. These so-called "invisible" decays do not directly deposit energy within the detector but are instead detected through their subsequent nuclear de-excitation and gamma-ray emission. New limits are given for the partial lifetimes: $\tau(n\rightarrow inv) > 9.0\times10^{29}$ years, $\tau(p\rightarrow inv) > 9.6\times10^{29}$ years, $\tau(nn\rightarrow inv) > 1.5\times10^{28}$ years, $\tau(np\rightarrow inv) > 6.0\times10^{28}$ years, and $\tau(pp\rightarrow inv) > 1.1\times10^{29}$ years at 90\% Bayesian credibility level (with a prior uniform in rate). All but the ($nn\rightarrow inv$) results improve on existing limits by a factor of about 3.

Published
2022
Full Text
View/download PDF

7. Optical calibration of the SNO+ detector in the water phase with deployed sources

Author

Collaboration, SNO, Anderson, M. R., Andringa, S., Askins, M., Auty, D. J., Barão, F., Barros, N., Bayes, R., Beier, E. W., Bialek, A., Biller, S. D., Blucher, E., Boulay, M., Caden, E., Callaghan, E. J., Caravaca, J., Chen, M., Chkvorets, O., Cleveland, B., Cookman, D., Corning, J., Cox, M. A., Deluce, C., Depatie, M. M., Di Lodovico, F., Dittmer, J., Falk, E., Fatemighomi, N., Fischer, V., Ford, R., Frankiewicz, K., Gaur, A., Gilje, K., González-Reina, O. I., Gooding, D., Grant, C., Grove, J., Hallin, A. L., Hallman, D., Hartnell, J., Heintzelman, W. J., Helmer, R. L., Hu, J., Hunt-Stokes, R., Hussain, S. M. A., Inácio, A. S., Jillings, C. J., Kaptanoglu, T., Khaghani, P., Khan, H., Klein, J. R., Kormos, L. L., Krar, B., Kraus, C., Krauss, C. B., Kroupová, T., Lam, I., Land, B. J., LaTorre, A., Lawson, I., Lebanowski, L., Lefebvre, C., Li, A., Lidgard, J., Lin, Y. H., Liu, Y., Lozza, V., Luo, M., Maio, A., Manecki, S., Maneira, J., Martin, R. D., McCauley, N., McDonald, A. B., Meyer, M., Mills, C., Morton-Blake, I., Nae, S., Nirkko, M., Nolan, L. J., O'Keeffe, H. M., Gann, G. D. Orebi, Page, J., Parker, W., Paton, J., Peeters, S. J. M., Pershing, T., Pickard, L., Prior, G., Ravi, P., Reichold, A., Riccetto, S., Richardson, R., Rigan, M., Rose, J., Rumleskie, J., Semenec, I., Shaker, F., Sharma, M. K., Skensved, P., Smiley, M., Stainforth, R., Svoboda, R., Tam, B., Tseng, J., Turner, E., Valder, S., Vázquez-Jáuregui, E., Veinot, J. G. C., Virtue, C. J., Wang, J., Ward, M., Weigand, J. J., Wilson, J. R., Wright, A., Yanez, J. P., Yeh, M., Yu, S., Zhang, T., Zhang, Y., Zuber, K., and Zummo, A.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment, Nuclear Experiment
Abstract

SNO+ is a large-scale liquid scintillator experiment with the primary goal of searching for neutrinoless double beta decay, and is located approximately 2 km underground in SNOLAB, Sudbury, Canada. The detector acquired data for two years as a pure water Cherenkov detector, starting in May 2017. During this period, the optical properties of the detector were measured in situ using a deployed light diffusing sphere, with the goal of improving the detector model and the energy response systematic uncertainties. The measured parameters included the water attenuation coefficients, effective attenuation coefficients for the acrylic vessel, and the angular response of the photomultiplier tubes and their surrounding light concentrators, all across different wavelengths. The calibrated detector model was validated using a deployed tagged gamma source, which showed a 0.6% variation in energy scale across the primary target volume., Comment: Accepted by JINST (30 pages, 19 figures)

Published
2021
Full Text
View/download PDF

8. The SNO+ Experiment

Author

Collaboration, SNO, Albanese, V., Alves, R., Anderson, M. R., Andringa, S., Anselmo, L., Arushanova, E., Asahi, S., Askins, M., Auty, D. J., Back, A. R., Back, S., Barão, F., Barnard, Z., Barr, A., Barros, N., Bartlett, D., Bayes, R., Beaudoin, C., Beier, E. W., Berardi, G., Bialek, A., Biller, S. D., Blucher, E., Bonventre, R., Boulay, M., Braid, D., Caden, E., Callaghan, E. J., Caravaca, J., Carvalho, J., Cavalli, L., Chauhan, D., Chen, M., Chkvorets, O., Clark, K. J., Cleveland, B., Connors, C., Cookman, D., Coulter, I. T., Cox, M. A., Cressy, D., Dai, X., Darrach, C., Davis-Purcell, B., Deluce, C., Depatie, M. M., Descamps, F., Di Lodovico, F., Dittmer, J., Doxtator, A., Duhaime, N., Duncan, F., Dunger, J., Earle, A. D., Fabris, D., Falk, E., Farrugia, A., Fatemighomi, N., Felber, C., Fischer, V., Fletcher, E., Ford, R., Frankiewicz, K., Gagnon, N., Gaur, A., Gauthier, J., Gibson-Foster, A., Gilje, K., González-Reina, O. I., Gooding, D., Gorel, P., Graham, K., Grant, C., Grove, J., Grullon, S., Guillian, E., Hall, S., Hallin, A. L., Hallman, D., Hans, S., Hartnell, J., Harvey, P., Hedayatipour, M., Heintzelman, W. J., Heise, J., Helmer, R. L., Hodak, B., Hodak, M., Hood, M., Horne, D., Hreljac, B., Hu, J., Hussain, S. M. A., Iida, T., Inácio, A. S., Jackson, C. M., Jelley, N. A., Jillings, C. J., Jones, C., Jones, P. G., Kamdin, K., Kaptanoglu, T., Kaspar, J., Keeter, K., Kefelian, C., Khaghani, P., Kippenbrock, L., Klein, J. R., Knapik, R., Kofron, J., Kormos, L. L., Korte, S., Krar, B., Kraus, C., Krauss, C. B., Kroupová, T., Labe, K., Lafleur, F., Lam, I., Lan, C., Land, B. J., Lane, R., Langrock, S., Larochelle, P., Larose, S., LaTorre, A., Lawson, I., Lebanowski, L., Lefeuvre, G. M., Leming, E. J., Li, A., Li, O., Lidgard, J., Liggins, B., Liimatainen, P., Lin, Y. H., Liu, X., Liu, Y., Lozza, V., Luo, M., Maguire, S., Maio, A., Majumdar, K., Manecki, S., Maneira, J., Martin, R. D., Marzec, E., Mastbaum, A., Mathewson, A., McCauley, N., McDonald, A. B., McFarlane, K., Mekarski, P., Meyer, M., Miller, C., Mills, C., Mlejnek, M., Mony, E., Morissette, B., Morton-Blake, I., Mottram, M. J., Nae, S., Nirkko, M., Nolan, L. J., Novikov, V. M., O'Keeffe, H. M., O'Sullivan, E., Gann, G. D. Orebi, Parnell, M. J., Paton, J., Peeters, S. J. M., Pershing, T., Petriw, Z., Petzoldt, J., Pickard, L., Pracsovics, D., Prior, G., Prouty, J. C., Quirk, S., Read, S., Reichold, A., Riccetto, S., Richardson, R., Rigan, M., Ritchie, I., Robertson, A., Robertson, B. C., Rose, J., Rosero, R., Rost, P. M., Rumleskie, J., Schumaker, M. A., Schwendener, M. H., Scislowski, D., Secrest, J., Seddighin, M., Segui, L., Seibert, S., Semenec, I., Shaker, F., Shantz, T., Sharma, M. K., Shokair, T. M., Sibley, L., Sinclair, J. R., Singh, K., Skensved, P., Smiley, M., Sonley, T., Sörensen, A., St-Amant, M., Stainforth, R., Stankiewicz, S., Strait, M., Stringer, M. I., Stripay, A., Svoboda, R., Tacchino, S., Tam, B., Tanguay, C., Tatar, J., Tian, L., Tolich, N., Tseng, J., Tseung, H. W. C., Turner, E., Van Berg, R., Vázquez-Jáuregui, E., Veinot, J. G. C., Virtue, C. J., von Krosigk, B., Walker, J. M. G., Walker, M., Wallig, J., Walton, S. C., Wang, J., Ward, M., Wasalski, O., Waterfield, J., Weigand, J. J., White, R. F., Wilson, J. R., Winchester, T. J., Woosaree, P., Wright, A., Yanez, J. P., Yeh, M., Zhang, T., Zhang, Y., Zhao, T., Zuber, K., and Zummo, A.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment, Nuclear Experiment
Abstract

The SNO+ experiment is located 2 km underground at SNOLAB in Sudbury, Canada. A low background search for neutrinoless double beta ($0\nu\beta\beta$) decay will be conducted using 780 tonnes of liquid scintillator loaded with 3.9 tonnes of natural tellurium, corresponding to 1.3 tonnes of $^{130}$Te. This paper provides a general overview of the SNO+ experiment, including detector design, construction of process plants, commissioning efforts, electronics upgrades, data acquisition systems, and calibration techniques. The SNO+ collaboration is reusing the acrylic vessel, PMT array, and electronics of the SNO detector, having made a number of experimental upgrades and essential adaptations for use with the liquid scintillator. With low backgrounds and a low energy threshold, the SNO+ collaboration will also pursue a rich physics program beyond the search for $0\nu\beta\beta$ decay, including studies of geo- and reactor antineutrinos, supernova and solar neutrinos, and exotic physics such as the search for invisible nucleon decay. The SNO+ approach to the search for $0\nu\beta\beta$ decay is scalable: a future phase with high $^{130}$Te-loading is envisioned to probe an effective Majorana mass in the inverted mass ordering region., Comment: 61 pages, 23 figures, 4 tables

Published
2021
Full Text
View/download PDF

9. Development, characterisation, and deployment of the SNO+ liquid scintillator

Author

Collaboration, SNO, Anderson, M. R., Andringa, S., Anselmo, L., Arushanova, E., Asahi, S., Askins, M., Auty, D. J., Back, A. R., Barnard, Z., Barros, N., Bartlett, D., Barão, F., Bayes, R., Beier, E. W., Bialek, A., Biller, S. D., Blucher, E., Bonventre, R., Boulay, M., Braid, D., Caden, E., Callaghan, E. J., Caravaca, J., Carvalho, J., Cavalli, L., Chauhan, D., Chen, M., Chkvorets, O., Clark, K. J., Cleveland, B., Cookman, D., Connors, C., Coulter, I. T., Cox, M. A., Cressy, D., Dai, X., Darrach, C., Davis-Purcell, B., Deluce, C., Depatie, M. M., Descamps, F., Dittmer, J., Di Lodovico, F., Duhaime, N., Duncan, F., Dunger, J., Earle, A. D., Fabris, D., Falk, E., Farrugia, A., Fatemighomi, N., Fischer, V., Fletcher, E., Ford, R., Frankiewicz, K., Gagnon, N., Gaur, A., Gilje, K., González-Reina, O. I., Gooding, D., Gorel, P., Graham, K., Grant, C., Grove, J., Grullon, S., Guillian, E., Hall, S., Hallin, A. L., Hallman, D., Hans, S., Hartnell, J., Harvey, P., Hedayatipour, M., Heintzelman, W. J., Heise, J., Helmer, R. L., Horne, D., Hreljac, B., Hu, J., Hussain, A. S. M., Iida, T., Inácio, A. S., Jackson, M., Jelley, N. A., Jillings, C. J., Jones, C., Jones, P. G., Kamdin, K., Kaptanoglu, T., Kaspar, J., Keeter, K., Kefelian, C., Khaghani, P., Kippenbrock, L., Klein, J. R., Knapik, R., Kofron, J., Kormos, L. L., Korte, S., Krar, B., Kraus, C., Krauss, C. B., Kroupova, T., Labe, K., Lafleur, F., Lam, I., Lan, C., Land, B. J., Lane, R., Langrock, S., LaTorre, A., Lawson, I., Lebanowski, L., Lefeuvre, G. M., Leming, E. J., Li, A., Lidgard, J., Liggins, B., Lin, Y. H., Liu, X., Liu, Y., Lozza, V., Luo, M., Maguire, S., Maio, A., Majumdar, K., Manecki, S., Maneira, J., Martin, R. D., Marzec, E., Mastbaum, A., Mauel, J., McCauley, N., McDonald, A. B., Mekarski, P., Meyer, M., Miller, C., Mills, C., Mlejnek, M., Mony, E., Morton-Blake, I., Mottram, M. J., Nae, S., Nirkko, M., Nolan, L. J., Novikov, V. M., O'Keeffe, H. M., O'Sullivan, E., Gann, G. D. Orebi, Parnell, M. J., Paton, J., Peeters, S. J. M., Pershing, T., Petriw, Z., Petzoldt, J., Pickard, L., Pracsovics, D., Prior, G., Prouty, J. C., Quirk, S., Reichold, A., Riccetto, S., Richardson, R., Rigan, M., Robertson, A., Rose, J., Rosero, R., Rost, P. M., Rumleskie, J., Schumaker, M. A., Schwendener, M. H., Scislowski, D., Secrest, J., Seddighin, M., Segui, L., Seibert, S., Semenec, I., Shaker, F., Shantz, T., Sharma, M. K., Shokair, T. M., Sibley, L., Sinclair, J. R., Singh, K., Skensved, P., Smiley, M., Sonley, T., Stainforth, R., Strait, M., Stringer, M. I., Svoboda, R., Sörensen, A., Tam, B., Tatar, J., Tian, L., Tolich, N., Tseng, J., Tseung, H. W. C., Turner, E., Van Berg, R., Veinot, J. G. C., Virtue, C. J., von Krosigk, B., Vázquez-Jáuregui, E., Walker, J. M. G., Walker, M., Walton, S. C., Wang, J., Ward, M., Wasalski, O., Waterfield, J., Weigand, J. J., White, R. F., Wilson, J. R., Winchester, T. J., Woosaree, P., Wright, A., Yanez, J. P., Yeh, M., Zhang, T., Zhang, Y., Zhao, T., Zuber, K., and Zummo, A.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract

A liquid scintillator consisting of linear alkylbenzene as the solvent and 2,5-diphenyloxazole as the fluor was developed for the SNO+ experiment. This mixture was chosen as it is compatible with acrylic and has a competitive light yield to pre-existing liquid scintillators while conferring other advantages including longer attenuation lengths, superior safety characteristics, chemical simplicity, ease of handling, and logistical availability. Its properties have been extensively characterized and are presented here. This liquid scintillator is now used in several neutrino physics experiments in addition to SNO+., Comment: 21 pages, 10 figures

Published
2020
Full Text
View/download PDF

10. Measurement of neutron-proton capture in the SNO+ water phase

Author

Collaboration, The SNO, Anderson, M. R., Andringa, S., Askins, M., Auty, D. J., Barros, N., Barão, F., Bayes, R., Beier, E. W., Bialek, A., Biller, S. D., Blucher, E., Bonventre, R., Boulay, M., Caden, E., Callaghan, E. J., Caravaca, J., Chauhan, D., Chen, M., Chkvorets, O., Cleveland, B., Cox, M. A., Depatie, M. M., Dittmer, J., Di Lodovico, F., Earle, A. D., Falk, E., Fatemighomi, N., Fischer, V., Fletcher, E., Ford, R., Frankiewicz, K., Gilje, K., Gooding, D., Grant, C., Grove, J., Hallin, A. L., Hallman, D., Hans, S., Hartnell, J., Harvey, P., Heintzelman, W. J., Helmer, R. L., Horne, D., Hreljac, B., Hu, J., Hussain, A. S. M., Inácio, A. S., Jillings, C. J., Kaptanoglu, T., Khaghani, P., Klein, J. R., Knapik, R., Kormos, L. L., Krar, B., Kraus, C., Krauss, C. B., Kroupova, T., Lam, I., Land, B. J., LaTorre, A., Lawson, I., Lebanowski, L., Leming, E. J., Li, A., Lidgard, J., Liggins, B., Lin, Y. H., Liu, Y., Lozza, V., Luo, M., Maguire, S., Maio, A., Manecki, S., Maneira, J., Martin, R. D., Marzec, E., Mastbaum, A., McCauley, N., McDonald, A. B., Mekarski, P., Meyer, M., Mills, C., Morton-Blake, I., Nae, S., Nirkko, M., Nolan, L. J., O'Keeffe, H. M., Gann, G. D. Orebi, Parnell, M. J., Paton, J., Peeters, S. J. M., Pershing, T., Pickard, L., Prior, G., Reichold, A., Riccetto, S., Richardson, R., Rigan, M., Rose, J., Rosero, R., Rost, P. M., Rumleskie, J., Semenec, I., Shaker, F., Sharma, M. K., Singh, K., Skensved, P., Smiley, M., Stringer, M. I., Svoboda, R., Tam, B., Tian, L., Tseng, J., Turner, E., Van Berg, R., Veinot, J. G. C., Virtue, C. J., Vázquez-Jáuregui, E., Walton, S. C., Wang, J., Ward, M., Weigand, J. J., Wilson, J. R., Woosaree, P., Wright, A., Yanez, J. P., Yeh, M., Zhang, T., Zhang, Y., Zuber, K., and Zummo, A.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment, Nuclear Experiment
Abstract

The SNO+ experiment collected data as a low-threshold water Cherenkov detector from September 2017 to July 2019. Measurements of the 2.2-MeV $\gamma$ produced by neutron capture on hydrogen have been made using an Am-Be calibration source, for which a large fraction of emitted neutrons are produced simultaneously with a 4.4-MeV $\gamma$. Analysis of the delayed coincidence between the 4.4-MeV $\gamma$ and the 2.2-MeV capture $\gamma$ revealed a neutron detection efficiency that is centered around 50% and varies at the level of 1% across the inner region of the detector, which to our knowledge is the highest efficiency achieved among pure water Cherenkov detectors. In addition, the neutron capture time constant was measured and converted to a thermal neutron-proton capture cross section of $336.3^{+1.2}_{-1.5}$ mb.

Published
2020
Full Text
View/download PDF

11. Search for invisible modes of nucleon decay in water with the SNO+ detector

Author

Collaboration, SNO, Anderson, M., Andringa, S., Arushanova, E., Asahi, S., Askins, M., Auty, D. J., Back, A. R., Barnard, Z., Barros, N., Bartlett, D., Barão, F., Bayes, R., Beier, E. W., Bialek, A., Biller, S. D., Blucher, E., Bonventre, R., Boulay, M., Braid, D., Caden, E., Callaghan, E. J., Caravaca, J., Carvalho, J., Cavalli, L., Chauhan, D., Chen, M., Chkvorets, O., Clark, K. J., Cleveland, B., Connors, C., Coulter, I. T., Cressy, D., Dai, X., Darrach, C., Davis-Purcell, B., Depatie, M. M., Descamps, F., Di Lodovico, F., Duhaime, N., Duncan, F., Dunger, J., Falk, E., Fatemighomi, N., Fischer, V., Fletcher, E., Ford, R., Gagnon, N., Gilje, K., Gorel, P., Graham, K., Grant, C., Grove, J., Grullon, S., Guillian, E., Hallin, A. L., Hallman, D., Hans, S., Hartnell, J., Harvey, P., Hedayatipour, M., Heintzelman, W. J., Heise, J., Helmer, R. L., Hernández-Hernández, J. L., Hreljac, B., Hu, J., Iida, T., Inácio, A. S., Jackson, C. M., Jelley, N. A., Jillings, C. J., Jones, C., Jones, P. G., Kamdin, K., Kaptanoglu, T., Kaspar, J., Keeter, K., Kefelian, C., Khaghani, P., Kippenbrock, L., Klein, J. R., Knapik, R., Kofron, J., Kormos, L. L., Krar, B., Kraus, C., Krauss, C. B., Kroupova, T., Labe, K., Lam, I., Lan, C., Land, B. J., Lane, R., Langrock, S., LaTorre, A., Lawson, I., Lebanowski, L., Lefeuvre, G. M., Leming, E. J., Li, A., Lidgard, J., Liggins, B., Liu, X., Liu, Y., Lozza, V., Luo, M., Maguire, S., Maio, A., Majumdar, K., Manecki, S., Maneira, J., Martin, R. D., Marzec, E., Mastbaum, A., McCauley, N., McDonald, A. B., McMillan, J. E., Mekarski, P., Meyer, M., Miller, C., Mlejnek, M., Mony, E., Morton-Blake, I., Mottram, M. J., Nae, S., Nirkko, M., Novikov, V., O'Keeffe, H. M., O'Sullivan, E., Gann, G. D. Orebi, Parnell, M. J., Paton, J., Peeters, S. J. M., Pershing, T., Petriw, Z., Pickard, L., Pracsovics, D., Prior, G., Prouty, J. C., Quirk, S., Reichold, A., Richardson, R., Rigan, M., Robertson, A., Rose, J., Rosero, R., Rost, P. M., Rumleskie, J., Schumaker, M. A., Schwendener, M. H., Scislowski, D., Secrest, J., Seddighin, M., Segui, L., Seibert, S., Semenec, I., Shantz, T., Shokair, T. M., Sibley, L., Sinclair, J. R., Singh, K., Skensved, P., Sonley, T., Stainforth, R., Strait, M., Stringer, M. I., Svoboda, R., Sörensen, A., Tam, B., Tatar, J., Tian, L., Tolich, N., Tseng, J., Tseung, H. W. C., Turner, E., Van Berg, R., Veinot, J. G. C., Virtue, C. J., von Krosigk, B., Vázquez-Jáuregui, E., Walker, J. M. G., Walker, M., Wang, J., Wasalski, O., Waterfield, J., Weigand, J. J., White, R. F., Wilson, J. R., Winchester, T. J., Woosaree, P., Wright, A., Yanez, J. P., Yeh, M., Zhao, T., Zuber, K., and Zummo, A.

Subjects
High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract

This paper reports results from a search for nucleon decay through 'invisible' modes, where no visible energy is directly deposited during the decay itself, during the initial water phase of SNO+. However, such decays within the oxygen nucleus would produce an excited daughter that would subsequently de-excite, often emitting detectable gamma rays. A search for such gamma rays yields limits of $2.5 \times 10^{29}$ y at 90% Bayesian credibility level (with a prior uniform in rate) for the partial lifetime of the neutron, and $3.6 \times 10^{29}$ y for the partial lifetime of the proton, the latter a 70% improvement on the previous limit from SNO. We also present partial lifetime limits for invisible dinucleon modes of $1.3\times 10^{28}$ y for $nn$, $2.6\times 10^{28}$ y for $pn$ and $4.7\times 10^{28}$ y for $pp$, an improvement over existing limits by close to three orders of magnitude for the latter two., Comment: 13 pages, 6 figures

Published
2018
Full Text
View/download PDF

12. Measurement of the $^8$B Solar Neutrino Flux in SNO+ with Very Low Backgrounds

Author

Collaboration, The SNO, Anderson, M., Andringa, S., Asahi, S., Askins, M., Auty, D. J., Barros, N., Bartlett, D., Barão, F., Bayes, R., Beier, E. W., Bialek, A., Biller, S. D., Blucher, E., Bonventre, R., Boulay, M., Caden, E., Callaghan, E. J., Caravaca, J., Chauhan, D., Chen, M., Chkvorets, O., Cleveland, B., Connors, C., Coulter, I. T., Depatie, M. M., Di Lodovico, F., Duncan, F., Dunger, J., Falk, E., Fischer, V., Fletcher, E., Ford, R., Gagnon, N., Gilje, K., Grant, C., Grove, J., Hallin, A. L., Hallman, D., Hans, S., Hartnell, J., Heintzelman, W. J., Helmer, R. L., Hernández-Hernández, J. L., Hreljac, B., Hu, J., Inácio, A. S., Jillings, C. J., Kaptanoglu, T., Khaghani, P., Klein, J. R., Knapik, R., Kormos, L. L., Krar, B., Kraus, C., Krauss, C. B., Kroupova, T., Lam, I., Land, B. J., Lane, R., LaTorre, A., Lawson, I., Lebanowski, L., Leming, E. J., Li, A., Lidgard, J., Liggins, B., Liu, Y., Lozza, V., Luo, M., Maguire, S., Maio, A., Manecki, S., Maneira, J., Martin, R. D., Marzec, E., Mastbaum, A., McCauley, N., McDonald, A. B., Mekarski, P., Meyer, M., Mlejnek, M., Morton-Blake, I., Nae, S., Nirkko, M., O'Keeffe, H. M., Gann, G. D. Orebi, Parnell, M. J., Paton, J., Peeters, S. J. M., Pershing, T., Pickard, L., Pracsovics, D., Prior, G., Reichold, A., Richardson, R., Rigan, M., Rose, J., Rosero, R., Rumleskie, J., Semenec, I., Singh, K., Skensved, P., Stringer, M. I., Svoboda, R., Tam, B., Tian, L., Tseng, J., Turner, E., Van Berg, R., Veinot, J. G. C., Virtue, C. J., Vázquez-Jáuregui, E., Wang, J., Weigand, J. J., Wilson, J. R., Woosaree, P., Wright, A., Yanez, J. P., Yeh, M., Zuber, K., and Zummo, A.

Subjects
High Energy Physics - Experiment
Abstract

A measurement of the $^8$B solar neutrino flux has been made using a 69.2 kt-day dataset acquired with the SNO+ detector during its water commissioning phase. At energies above 6 MeV the dataset is an extremely pure sample of solar neutrino elastic scattering events, owing primarily to the detector's deep location, allowing an accurate measurement with relatively little exposure. In that energy region the best fit background rate is $0.25^{+0.09}_{-0.07}$ events/kt-day, significantly lower than the measured solar neutrino event rate in that energy range, which is $1.03^{+0.13}_{-0.12}$ events/kt-day. Also using data below this threshold, down to 5 MeV, fits of the solar neutrino event direction yielded an observed flux of $2.53^{+0.31}_{-0.28}$(stat.)$^{+0.13}_{-0.10}$(syst.)$\times10^6$ cm$^{-2}$s$^{-1}$, assuming no neutrino oscillations. This rate is consistent with matter enhanced neutrino oscillations and measurements from other experiments., Comment: 7 pages, 4 figures

Published
2018
Full Text
View/download PDF

14. Development and fabrication of sealed silver-zinc cells, phase 1

Author

Blake, I. C and Donnel, C. P., III

Subjects
Auxiliary Systems
Abstract

A facility was designed, constructed and equipped for the production of prismatic alkaline rechargeable battery cells using inorganic (ceramic) separators. This unique facility is environmentally controlled and contains separate areas for electrode fabrication, separator processing, cell assembly, cell finishing and testing. An initial production run of 125 sealed silver zinc cells, using inorganic separators, was made in the facility in order to provide samples for baseline performance tests. Ten of these cells were given performance characterization and life cycle tests.

Published
1973

Catalog

Books, media, physical & digital resources
See catalog results