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Your search keyword '"Virtue P"' showing total 21 results
Start Over Author "Virtue P" Topic physics - instrumentation and detectors
21 results on '"Virtue P"'

1. Accessing new physics with an undoped, cryogenic CsI CEvNS detector for COHERENT at the SNS

Author

Barbeau, P. S., Belov, V., Bernardi, I., Bock, C., Bolozdynya, A., Bouabid, R., Browning, J., Cabrera-Palmer, B., Conley, E., da Silva, V., Daughhetee, J., Detwiler, J., Ding, K., Durand, M. R., Efremenko, Y., Elliott, S. R., Erlandson, A., Fabris, L., Febbraro, M., Galindo-Uribarri, A., Green, M. P., Hakenmüller, J., Heath, M. R., Hedges, S., Johnson, B. A., Johnson, T., Khromov, A., Konovalov, A., Kozlova, E., Kumpan, A., Kyzylova, O., Link, J. M., Liu, J., Major, A., Mann, K., Markoff, D. M., Mattingly, J., Mueller, P. E., Newby, J., Ogoi, N., O'Reilly, J., Parno, D. S., Pérez-Loureiro, D., Penttila, S. I., Pershey, D., Prior, C. G., Queen, J., Rapp, R., Ray, H., Razuvaeva, O., Reyna, D., Rich, G. C., Rudik, D., Runge, J., Salvat, D. J., Sander, J., Scholberg, K., Shakirov, A., Simakov, G., Snow, W. M., Sosnovtsev, V., Stringer, M., Subedi, T., Suh, B., Sur, B., Tayloe, R., Tellez-Giron-Flores, K., Tsai, Y. -T., Vanderwerp, J., van Nieuwenhuizen, E. E., Varner, R. L., Virtue, C. J., Visser, G., Walkup, K., Ward, E. M., Wongjirad, T., Yang, Y., Yoo, J., Yu, C. -H., and Zaalishvili, A.

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

We consider the potential for a 10-kg undoped cryogenic CsI detector operating at the Spallation Neutron Source to measure coherent elastic neutrino-nucleus scattering and its sensitivity to discover new physics beyond the standard model. Through a combination of increased event rate, lower threshold, and good timing resolution, such a detector would significantly improve on past measurements. We considered tests of several beyond-the-standard-model scenarios such as neutrino non-standard interactions and accelerator-produced dark matter. This detector's performance was also studied for relevant questions in nuclear physics and neutrino astronomy, namely the weak charge distribution of CsI nuclei and detection of neutrinos from a core-collapse supernova.

Published
2023

2. 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
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3. COHERENT Collaboration data release from the measurements of CsI[Na] response to nuclear recoils

Author

Akimov, D., An, P., Awe, C., Barbeau, P. S., Becker, B., Belov, V., Bernardi, I., Blackston, M. A., Bock, C., Bolozdynya, A., Browning, J., Cabrera-Palmer, B., Chernyak, D., Conley, E., Daughhetee, J., Detwiler, J., Ding, K., Durand, M. R., Efremenko, Y., Elliott, S. R., Fabris, L., Febbraro, M., Rosso, A. Gallo, Galindo-Uribarri, A., Green, M. P., Heath, M. R., Hedges, S., Hoang, D., Hughes, M., Johnson, T., Khromov, A., Konovalov, A., Kozlova, E., Kumpan, A., Li, L., Link, J. M., Liu, J., Mann, K., Markoff, D. M., Mastroberti, J., Mueller, P. E., Newby, J., Parno, D. S., Penttila, S. I., Pershey, D., Rapp, R., Ray, H., Raybern, J., Razuvaeva, O., Reyna, D., Rich, G. C., Ross, J., Rudik, D., Runge, J., Salvat, D. J., Salyapongse, A. M., Sander, J., Scholberg, K., Shakirov, A., Simakov, G., Sinev, G., Snow, W. M., Sosnovtsev, V., Suh, B., Tayloe, R., Tellez-Giron-Flores, K., Tolstukhin, I., Ujah, E., Vanderwerp, J., Varner, R. L., Virtue, C. J., Visser, G., Wongjirad, T., Yang, Y., Yen, Y. -R., Yoo, J., Yu, C. -H., and Zettlemoyer, J.

Subjects
Physics - Instrumentation and Detectors
Abstract

Description of the data release 10.13139/OLCF/1969085 (https://doi.ccs.ornl.gov/ui/doi/426) from the measurements of the CsI[Na] response to low energy nuclear recoils by the COHERENT collaboration. The release corresponds to the results published in "D. Akimov et al 2022 JINST 17 P10034". We share the data in the form of raw ADC waveforms, provide benchmark values, and share plots to enhance the transparency and reproducibility of our results. This document describes the contents of the data release as well as guidance on the use of the data.

Published
2023

4. The COHERENT Experimental Program

Author

Akimov, D., Alawabdeh, S., An, P., Arteaga, A., Awe, C., Barbeau, P. S., Barry, C., Becker, B., Belov, V., Bernardi, I., Blackston, M. A., Blokland, L., Bock, C., Bodur, B., Bolozdynya, A., Bouabid, R., Bracho, A., Browning, J., Cabrera-Palmer, B., Chen, N., Chernyak, D., Conley, E., Daughhetee, J., Daughtry, J., Day, E., Coello, M. del Valle, Detwiler, J., Ding, K., Durand, M. R., Efremenko, Y., Elliott, S. R., Fabris, L., Febbraro, M., Fox, W., Galambos, J., Rosso, A. Gallo, Galindo-Uribarri, A., Gilbert, C., Green, M. P., Hansen, K. R., Harris, B., Heath, M. R., Hedges, S., Henderson, R., Hoang, D., Hughes, C., Hughes, M., Iverson, E., Jairam, P., Johnson, B. A., Johnson, T., Kaufman, L., Khromov, A., Konovalov, A., Koros, J., Kozlova, E., Kumpan, A., Li, L., Librande, J. T., Link, J. M., Liu, J., Major, A., Mann, K., Markoff, D. M., Mastroberti, J., Mattingly, J., McGoldrick, O., McIntyre, M., Melikyan, Y. A., Mishra, M., Mueller, P. E., Newby, J., Parno, D. S., Penne, A., Penttila, S. I., Pershey, D., Prior, C., Radford, D., Rahman, F., Rapp, R., Ray, H., Raybern, J., Razuvaeva, O., Reyna, D., Rich, G. C., Rimal, D., Ross, J., Rouzky, A., Rudik, D., Runge, J., Salvat, D. J., Salyapongse, A. M., Sander, J., Scholberg, K., Siehien, P., Shakirov, A., Simakov, G., Sinev, G., Snow, W. M., Sosnovstsev, V., Steele, J., Hjelmstad, A. Strasbaugh, Subedi, T., Suh, B., Tayloe, R., Tellez-Giron-Flores, K., Thornton, R. T., Tolstukhin, I., Trotter, S., Tsai, F., Tsai, Y. -T., Ujah, E., Vanderwerp, J., van Nieuwenhuizen, E., Varner, R. L., Vasquez, S., Virtue, C. J., Visser, G., Walkup, K., Wang, J., Ward, E. M., Wiseman, C., Wongjirad, T., Wu, D., Yang, J., Yang, Y., Yen, Y. -R., Yoo, J., Yu, C. -H., Zettlemoyer, J., and Zhang, S.

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

The COHERENT experiment located in Neutrino Alley at the Spallation Neutron Source (SNS), Oak Ridge National Laboratory (ORNL), has made the world's first two measurements of coherent elastic neutrino-nucleus scattering (CEvNS), on CsI and argon, using neutrinos produced at the SNS. The COHERENT collaboration continues to pursue CEvNS measurements on various targets as well as additional studies of inelastic neutrino-nucleus interactions, searches for accelerator-produced dark matter (DM) and physics beyond the Standard Model, using the uniquely high-quality and high-intensity neutrino source available at the SNS. This white paper describes primarily COHERENT's ongoing and near-future program at the SNS First Target Station (FTS). Opportunities enabled by the SNS Second Target Station (STS) for the study of neutrino physics and development of novel detector technologies are elaborated in a separate white paper., Comment: 38 papers, 24 figures; Snowmass contribution

Published
2022

5. Monitoring the SNS basement neutron background with the MARS detector

Author

COHERENT Collaboration, Akimov, D., An, P., Awe, C., Barbeau, P. S., Becker, B., Belov, V., Bernardi, I., Blackston, M. A., Bock, C., Bolozdynya, A., Browning, J., Cabrera-Palmer, B., Chernyak, D., Conley, E., Daughhetee, J., Detwiler, J., Ding, K., Durand, M. R., Efremenko, Y., Elliott, S. R., Fabris, L., Febbraro, M., Rosso, A. Gallo, Galindo-Uribarri, A., Green, M. P., Heath, M. R., Hedges, S., Hoang, D., Hughes, M., Johnson, B. A., Johnson, T., Khromov, A., Konovalov, A., Kozlova, E., Kumpan, A., Li, L., Link, J. M., Liu, J., Mann, K., Markoff, D. M., Mastroberti, J., Mueller, P. E., Newby, J., Parno, D. S., Penttila, S. I., Pershey, D., Rapp, R., Ray, H., Raybern, J., Razuvaeva, O., Reyna, D., Rich, G. C., Ross, J., Rudik, D., Runge, J., Salvat, D. J., Salyapongse, A. M., Scholberg, K., Shakirov, A., Simakov, G., Sinev, G., Snow, W. M., Sosnovstsev, V., Suh, B., Tayloe, R., Tellez-Giron-Flores, K., Tolstukhin, I., Ujah, E., Vanderwerp, J., Varner, R. L., Virtue, C. J., Visser, G., Wongjirad, T., Yen, Y. -R., Yoo, J., Yu, C. -H., and Zettlemoyer, J.

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

We present the analysis and results of the first dataset collected with the MARS neutron detector deployed at the Oak Ridge National Laboratory Spallation Neutron Source (SNS) for the purpose of monitoring and characterizing the beam-related neutron (BRN) background for the COHERENT collaboration. MARS was positioned next to the COH-CsI coherent elastic neutrino-nucleus scattering detector in the SNS basement corridor. This is the basement location of closest proximity to the SNS target and thus, of highest neutrino flux, but it is also well shielded from the BRN flux by infill concrete and gravel. These data show the detector registered roughly one BRN per day. Using MARS' measured detection efficiency, the incoming BRN flux is estimated to be $1.20~\pm~0.56~\text{neutrons}/\text{m}^2/\text{MWh}$ for neutron energies above $\sim3.5$ MeV and up to a few tens of MeV. We compare our results with previous BRN measurements in the SNS basement corridor reported by other neutron detectors.

Published
2021
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6. Measurement of scintillation response of CsI[Na] to low-energy nuclear recoils by COHERENT

Author

Akimov, D., An, P., Awe, C., Barbeau, P. S., Becker, B., Belov, V., Bernardi, I., Blackston, M. A., Bock, C., Bolozdynya, A., Browning, J., Cabrera-Palmer, B., Chernyak, D., Conley, E., Daughhetee, J., Detwiler, J., Ding, K., Durand, M. R., Efremenko, Y., Elliott, S. R., Fabris, L., Febbraro, M., Rosso, A. Gallo, Galindo-Uribarri, A., Green, M. P., Heath, M. R., Hedges, S., Hoang, D., Hughes, M., Johnson, T., Khromov, A., Konovalov, A., Kozlova, E., Kumpan, A., Li, L., Link, J. M., Liu, J., Mann, K., Markoff, D. M., Mastroberti, J., Melikyan, Y. A., Mueller, P. E., Newby, J., Parno, D. S., Penttila, S. I., Pershey, D., Rapp, R., Ray, H., Raybern, J., Razuvaeva, O., Reyna, D., Rich, G. C., Ross, J., Rudik, D., Runge, J., Salvat, D. J., Salyapongse, A. M., Scholberg, K., Shakirov, A., Simakov, G., Sinev, G., Snow, W. M., Sosnovstsev, V., Suh, B., Tayloe, R., Tellez-Giron-Flores, K., Tolstukhin, I., Ujah, E., Vanderwerp, J., Varner, R. L., Virtue, C. J., Visser, G., Wongjirad, T., Yen, Y. -R., Yoo, J., Yu, C. -H., and Zettlemoyer, J.

Subjects
Physics - Instrumentation and Detectors
Abstract

We present results of several measurements of CsI[Na] scintillation response to 3-60 keV energy nuclear recoils performed by the COHERENT collaboration using tagged neutron elastic scattering experiments and an endpoint technique. Earlier results, used to estimate the coherent elastic neutrino-nucleus scattering (CEvNS) event rate for the first observation of this process achieved by COHERENT at the Spallation Neutron Source (SNS), have been reassessed. We discuss corrections for the identified systematic effects and update the respective uncertainty values. The impact of updated results on future precision tests of CEvNS is estimated. We scrutinize potential systematic effects that could affect each measurement. In particular we confirm the response of the H11934-200 Hamamatsu photomultiplier tube (PMT) used for the measurements presented in this study to be linear in the relevant signal scale region., Comment: The version accepted by JINST. The changes made as a result of the peer review process: 1. Section 8 "Global CsI[Na] QF data fit" is expanded. The main fit result and its uncertainty is NOT CHANGED. An alternative fit is now shown in Figure 14, Figure 15 is added to further validate the assumptions in the main fit. 2. The Appendix B is restructured for clarity

Published
2021

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
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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
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9. A D$_{2}$O detector for flux normalization of a pion decay-at-rest neutrino source

Author

COHERENT Collaboration, Akimov, D., An, P., Awe, C., Barbeau, P. S., Becker, B., Belov, V., Bernardi, I., Blackston, M. A., Blokland, L., Bolozdynya, A., Cabrera-Palmer, B., Chernyak, D., Conley, E., Daughhetee, J., Day, E., Detwiler, J., Ding, K., Durand, M. R., Efremenko, Y., Elliott, S. R., Fabris, L., Febbraro, M., Rosso, A. Gallo, Galindo-Uribarri, A., Green, M. P., Heath, M. R., Hedges, S., Hoang, D., Hughes, M., Johnson, T., Khromov, A., Konovalov, A., Koros, J., Kozlova, E., Kumpan, A., Li, L., Link, J. M., Liu, J., Markoff, D. M., Mann, K., Mueller, P. E., Newby, J., Parno, D. S., Penttila, S. I., Pershey, D., Rapp, R., Ray, H., Raybern, J., Razuvaeva, O., Reyna, D., Rich, G. C., Ross, J., Rudik, D., Runge, J., Salvat, D. J., Salyapongse, A. M., Scholberg, K., Shakirov, A., Simakov, G., Sinev, G., Snow, W. M., Sosnovstsev, V., Suh, B., Tayloe, R., Tellez-Giron-Flores, K., Tolstukhin, I., Ujah, E., Vanderwerp, J., Varner, R. L., Virtue, C. J., Visser, G., Ward, E. M., Wiseman, C., Wongjirad, T., Yen, Y. -R., Yoo, J., Yu, C. -H., and Zettlemoyer, J.

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

We report on the technical design and expected performance of a 592 kg heavy-water-Cherenkov detector to measure the absolute neutrino flux from the pion-decay-at-rest neutrino source at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory (ORNL). The detector will be located roughly 20 m from the SNS target and will measure the neutrino flux with better than 5% statistical uncertainty in 2 years. This heavy-water detector will serve as the first module of a two-module detector system to ultimately measure the neutrino flux to 2-3% at both the First Target Station and the planned Second Target Station of the SNS. This detector will significantly reduce a dominant systematic uncertainty for neutrino cross-section measurements at the SNS, increasing the sensitivity of searches for new physics., Comment: As accepted to JINST

Published
2021
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10. 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
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11. Development of a $^{83\mathrm{m}}$Kr source for the calibration of the CENNS-10 Liquid Argon Detector

Author

COHERENT Collaboration, Akimov, D., An, P., Awe, C., Barbeau, P. S., Becker, B., Belov, V., Bernardi, I., Blackston, M. A., Blokland, L., Bolozdynya, A., Cabrera-Palmer, B., Chen, N., Chernyak, D., Conley, E., Daughhetee, J., Coello, M. del Valle, Detwiler, J. A., Durand, M. R., Efremenko, Y., Elliott, S. R., Fabris, L., Febbraro, M., Fox, W., Galindo-Uribarri, A., Rosso, A. Gallo, Green, M. P., Hansen, K. S., Heath, M. R., Hedges, S., Hughes, M., Johnson, T., Khromov, A., Konovalov, A., Kozlova, E., Kumpan, A., Li, L., Librande, J. T., Link, J. M., Liu, J., Mann, K., Markoff, D. M., McGoldrick, O., Mueller, P. E., Newby, J., Parno, D. S., Pentilla, S., Pershey, D., Radford, D., Rapp, R., Ray, H., Raybern, J., Razuvaeva, O., Reyna, D., Rich, G. C., Rudik, D., Runge, J., Salvat, D. J., Scholberg, K., Shakirov, A., Simakov, G., Snow, W. M., Sosnovtsev, V., Suh, B., Tayloe, R., Tellez-Giron-Flores, K., Thornton, R. T., Tolstukhin, I., Vanderwerp, J., Varner, R. L., Venkataraman, R., Virtue, C. J., Visser, G., Wiseman, C., Wongjirad, T., Yang, J., Yen, Y. -R., Yoo, J., Yu, C. -H., and Zettlemoyer, J.

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

We report on the preparation of and calibration measurements with a $^{83\mathrm{m}}$Kr source for the CENNS-10 liquid argon detector. $^{83\mathrm{m}}$Kr atoms generated in the decay of a $^{83}$Rb source were introduced into the detector via injection into the Ar circulation loop. Scintillation light arising from the 9.4 keV and 32.1 keV conversion electrons in the decay of $^{83\mathrm{m}}$Kr in the detector volume were then observed. This calibration source allows the characterization of the low-energy response of the CENNS-10 detector and is applicable to other low-energy-threshold detectors. The energy resolution of the detector was measured to be 9$\%$ at the total $^{83\mathrm{m}}$Kr decay energy of 41.5 keV. We performed an analysis to separately calibrate the detector using the two conversion electrons at 9.4 keV and 32.1 keV, Comment: v2: As accepted to JINST

Published
2020
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12. 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
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13. Sensitivity of the COHERENT Experiment to Accelerator-Produced Dark Matter

Author

COHERENT Collaboration, Akimov, D., An, P., Awe, C., Barbeau, P. S., Becker, B., Belov, V., Blackston, M. A., Bolozdynya, A., Cabrera-Palmer, B., Chen, N., Conley, E., Cooper, R. L., Daughhetee, J., Coello, M. del Valle, Detwiler, J. A., Durand, M. R., Efremenko, Y., Elliott, S. R., Fabris, L., Febbraro, M., Fox, W., Galindo-Uribarri, A., Green, M. P., Hansen, K. S., Heath, M. R., Hedges, S., Johnson, T., Kaemingk, M., Kaufman, L. J., Khromov, A., Konovalov, A., Kozlova, E., Kumpan, A., Li, L., Librande, J. T., Link, J. M., Liu, J., Mann, K., Markoff, D. M., Moreno, H., Mueller, P. E., Newby, J., Parno, D. S., Penttila, S., Pershey, D., Radford, D., Rapp, R., Ray, H., Raybern, J., Razuvaeva, O., Reyna, D., Rich, G. C., Rudik, D., Runge, J., Salvat, D. J., Scholberg, K., Shakirov, A., Simakov, G., Sinev, G., Snow, W. M., Sosnovtsev, V., Suh, B., Tayloe, R., Tellez-Giron-Flores, K., Thornton, R. T., Tolstukhin, I., Vanderwerp, J., Varner, R. L., Virtue, C. J., Visser, G., Wiseman, C., Wongjirad, T., Yang, J., Yen, Y. -R., Yoo, J., Yu, C. -H., and Zettlemoyer, J.

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

The COHERENT experiment is well poised to test sub-GeV dark matter models using low-energy recoil detectors sensitive to coherent elastic neutrino-nucleus scattering (CEvNS) in the $\pi$-DAR neutrino beam produced by the Spallation Neutron Source. We show how a planned 750-kg liquid argon scintillation detector would place leading limits on scalar light dark matter models, over two orders of magnitude of dark matter mass, for dark matter particles produced through vector and leptophobic portals in the absence of other effects beyond the standard model. The characteristic timing structure of a $\pi$-DAR beam allows a unique opportunity for constraining systematic uncertainties on the standard model background in a time window where signal is not expected, enhancing expected sensitivity. Additionally, we discuss future prospects, further increasing the discovery potential of CEvNS detectors. Such methods would test the calculated thermal dark matter abundance for all couplings $\alpha'\leq1$ within the vector portal model over an order of magnitude of dark matter masses.

Published
2019
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14. 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
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15. COHERENT 2018 at the Spallation Neutron Source

Author

Akimov, D., Albert, J. B., An, P., Awe, C., Barbeau, P. S., Becker, B., Belov, V., Blackston, M. A., Bolozdynya, A., Brown, A., Burenkov, A., Cabrera-Palmer, B., Cervantes, M., Collar, J. I., Cooper, R. J., Cooper, R. L., Daughhetee, J., Dean, D. J., Coello, M. del Valle, Detwiler, J. A., D'Onofrio, M., Efremenko, Y., Elliott, S. R., Erkela, E., Etenko, A., Fabris, L., Febbraro, M., Fields, N., Fox, W., Galindo-Uribarri, A., Green, M. P., Heath, M. R., Hedges, S., Iverson, E. B., Kaemingk, M., Kaufman, L. J., Klein, S. R., Khromov, A., Ki, S., Konovalov, A., Kovalenko, A., Kumpan, A., Li, L., Lu, W., Mann, K., Melikyan, Y., Markoff, D. M., Moreno, H., Mueller, P. E., Naumov, P., Newby, J., Parno, D. S., Penttila, S., Perumpilly, G., Radford, D., Rapp, R., Ray, H., Raybern, J., Reyna, D., Rich, G. C., Rimal, D., Rudik, D., Salvat, D. J., Scholberg, K., Scholz, B., Sinev, G., Snow, W. M., Sosnovtsev, V., Shakirov, A., Suh, B., Tayloe, R., Thornton, R. T., Tolstukhin, I., Vanderwerp, J., Varner, R. L., Virtue, C. J., Yoo, J., Yu, C. -H., and Zettlemoyer, J.

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

The primary goal of the COHERENT collaboration is to measure and study coherent elastic neutrino-nucleus scattering (CEvNS) using the high-power, few-tens-of-MeV, pulsed source of neutrinos provided by the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory (ORNL). The COHERENT collaboration reported the first detection of CEvNS [Akimov:2017ade] using a CsI[Na] detector. At present the collaboration is deploying four detector technologies: a CsI[Na] scintillating crystal, p-type point-contact germanium detectors, single-phase liquid argon, and NaI[Tl] crystals. All detectors are located in the neutron-quiet basement of the SNS target building at distances 20-30 m from the SNS neutrino source. The simultaneous measurement in all four COHERENT detector subsystems will test the $N^2$ dependence of the cross section and search for new physics. In addition, COHERENT is measuring neutrino-induced neutrons from charged- and neutral-current neutrino interactions on nuclei in shielding materials, which represent a non-negligible background for CEvNS as well as being of intrinsic interest. The Collaboration is planning as well to look for charged-current interactions of relevance to supernova and weak-interaction physics. This document describes concisely the COHERENT physics motivations, sensitivity, and next plans for measurements at the SNS to be accomplished on a few-year timescale., Comment: 22 pages, 14 figures

Published
2018

16. The search for neutron-antineutron oscillations at the Sudbury Neutrino Observatory

Author

SNO Collaboration, Aharmim, B., Ahmed, S. N., Anthony, A. E., Barros, N., Beier, E. W., Bellerive, A., Beltran, B., Bergevin, M., Biller, S. D., Boudjemline, K., Boulay, M. G., Cai, B., Chan, Y. D., Chauhan, D., Chen, M., Cleveland, B. T., Cox, G. A., Dai, X., Deng, H., Detwiler, J. A., Doe, P. J., Doucas, G., Drouin, P. -L., Duncan, F. A., Dunford, M., Earle, E. D., Elliott, S. R., Evans, H. C., Ewan, G. T., Farine, J., Fergani, H., Fleurot, F., Ford, R. J., Formaggio, J. A., Gagnon, N., Goon, J. TM., Graham, K., Guillian, E., Habib, S., Hahn, R. L., Hallin, A. L., Hallman, E. D., Harvey, P. J., Hazama, R., Heintzelman, W. J., Heise, J., Helmer, R. L., Hime, A., Howard, C., Huang, M., Jagam, P., Jamieson, B., Jelley, N. A., Jerkins, M., Keeter, K. J., Klein, J. R., Kormos, L. L., Kos, M., Kruger, A., Kraus, C., Krauss, C. B., Kutter, T., Kyba, C. C. M., Lange, R., Law, J., Lawson, I. T., Lesko, K. T., Leslie, J. R., Levine, I., Loach, J. C., MacLellan, R., Majerus, S., Mak, H. B., Maneira, J., Martin, R. D., McCauley, N., McDonald, A. B., McGee, S. R., Miller, M. L., Monreal, B., Monroe, J., Nickel, B. G., Noble, A. J., O'Keeffe, H. M., Oblath, N. S., Okada, C. E., Ollerhead, R. W., OrebiGann, G. D., Oser, S. M., Ott, R. A., Peeters, S. J. M., Poon, A. W. P., Prior, G., Reitzner, S. D., Rielage, K., Robertson, B. C., Robertson, R. G. H., Schwendener, M. H., Secrest, J. A., Seibert, S. R., Simard, O., Simpson, J. J., Sinclair, D., Skensved, P., Sonley, T. J., Stonehill, L. C., Tesic, G., Tolich, N., Tsui, T., Van Berg, R., VanDevender, B. A., Virtue, C. J., Wall, B. L., Waller, D., Tseung, H. Wan Chan, Wark, D. L., Wendland, J., West, N., Wilkerson, J. F., Wilson, J. R., Wright, A., Yeh, M., Zhang, F., and Zuber, K.

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

Tests on $B-L$ symmetry breaking models are important probes to search for new physics. One proposed model with $\Delta(B-L)=2$ involves the oscillations of a neutron to an antineutron. In this paper a new limit on this process is derived for the data acquired from all three operational phases of the Sudbury Neutrino Observatory experiment. The search was concentrated in oscillations occurring within the deuteron, and 23 events are observed against a background expectation of 30.5 events. These translate to a lower limit on the nuclear lifetime of $1.48\times 10^{31}$ years at 90% confidence level (CL) when no restriction is placed on the signal likelihood space (unbounded). Alternatively, a lower limit on the nuclear lifetime was found to be $1.18\times 10^{31}$ years at 90% CL when the signal was forced into a positive likelihood space (bounded). Values for the free oscillation time derived from various models are also provided in this article. This is the first search for neutron-antineutron oscillation with the deuteron as a target., Comment: 14 pages, 8 figures

Published
2017
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17. Current Status and Future Prospects of the SNO+ Experiment

Author

Collaboration, SNO, Andringa, S., Arushanova, E., Asahi, S., Askins, M., Auty, D. J., Back, A. R., Barnard, Z., Barros, N., Beier, E. W., Bialek, A., Biller, S. D., Blucher, E., Bonventre, R., Braid, D., Caden, E., Callaghan, E., Caravaca, J., Carvalho, J., Cavalli, L., Chauhan, D., Chen, M., Chkvorets, O., Clark, K., Cleveland, B., Coulter, I. T., Cressy, D., Dai, X., Darrach, C., Davis-Purcell, B., Deen, R., Depatie, M. M., Descamps, F., Di Lodovico, F., Duhaime, N., Duncan, F., Dunger, J., Falk, E., Fatemighomi, N., Ford, R., Gorel, P., Grant, C., Grullon, S., Guillian, E., Hallin, A. L., Hallman, D., Hans, S., Hartnell, J., Harvey, P., Hedayatipour, M., Heintzelman, W. J., Helmer, R. L., Hreljac, B., Hu, J., Iida, T., Jackson, C. M., Jelley, N. A., Jillings, C., Jones, C., Jones, P. G., Kamdin, K., Kaptanoglu, T., Kaspar, J., Keener, P., Khaghani, P., Kippenbrock, L., Klein, J. R., Knapik, R., Kofron, J. N., Kormos, L. L., Korte, S., Kraus, C., Krauss, C. B., Labe, K., Lam, I., Lan, C., Land, B. J., Langrock, S., LaTorre, A., Lawson, I., Lefeuvre, G. M., Leming, E. J., Lidgard, J., Liu, X., Liu, Y., Lozza, V., Maguire, S., Maio, A., Majumdar, K., Manecki, S., Maneira, J., Marzec, E., Mastbaum, A., McCauley, N., McDonald, A. B., McMillan, J. E., Mekarski, P., Miller, C., Mohan, Y., Mony, E., Mottram, M. J., Novikov, V., O'Keeffe, H. M., O'Sullivan, E., Gann, G. D. Orebi, Parnell, M. J., Peeters, S. J. M., Pershing, T., Petriw, Z., Prior, G., Prouty, J. C., Quirk, S., Reichold, A., 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., Shantz, T., Shokair, T. M., Sibley, L., Sinclair, J. R., Singh, K., Skensved, P., Soerensen, A., Sonley, T., Stainforth, R., Strait, M., Stringer, M. I., Svoboda, R., Tatar, J., Tian, L., Tolich, N., Tseng, J., Tseung, H. W. C., Van Berg, R., Vázquez-Jáuregui, E., Virtue, C., von Krosigk, B., Walker, J. M. G., Walker, M., Wasalski, O., Waterfield, J., White, R. F., Wilson, J. R., Winchester, T. J., Wright, A., Yeh, M., Zhao, T., and Zuber, K.

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

SNO+ is a large liquid scintillator-based experiment located 2km underground at SNOLAB, Sudbury, Canada. It reuses the Sudbury Neutrino Observatory detector, consisting of a 12m diameter acrylic vessel which will be filled with about 780 tonnes of ultra-pure liquid scintillator. Designed as a multipurpose neutrino experiment, the primary goal of SNO+ is a search for the neutrinoless double-beta decay (0$\nu\beta\beta$) of 130Te. In Phase I, the detector will be loaded with 0.3% natural tellurium, corresponding to nearly 800 kg of 130Te, with an expected effective Majorana neutrino mass sensitivity in the region of 55-133 meV, just above the inverted mass hierarchy. Recently, the possibility of deploying up to ten times more natural tellurium has been investigated, which would enable SNO+ to achieve sensitivity deep into the parameter space for the inverted neutrino mass hierarchy in the future. Additionally, SNO+ aims to measure reactor antineutrino oscillations, low-energy solar neutrinos, and geoneutrinos, to be sensitive to supernova neutrinos, and to search for exotic physics. A first phase with the detector filled with water will begin soon, with the scintillator phase expected to start after a few months of water data taking. The 0$\nu\beta\beta$ Phase I is foreseen for 2017., Comment: Published in "Neutrino Masses and Oscillations" of Advances in High Energy Physics (Hindawi)

Published
2015
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18. Coherent Scattering Investigations at the Spallation Neutron Source: a Snowmass White Paper

Author

Akimov, D., Bernstein, A., Barbeau, P., Barton, P., Bolozdynya, A., Cabrera-Palmer, B., Cavanna, F., Cianciolo, V., Collar, J., Cooper, R. J., Dean, D., Efremenko, Y., Etenko, A., Fields, N., Foxe, M., Figueroa-Feliciano, E., Fomin, N., Gallmeier, F., Garishvili, I., Gerling, M., Green, M., Greene, G., Hatzikoutelis, A., Henning, R., Hix, R., Hogan, D., Hornback, D., Jovanovic, I., Hossbach, T., Iverson, E., Klein, S. R., Khromov, A., Link, J., Louis, W., Lu, W., Mauger, C., Marleau, P., Markoff, D., Martin, R. D., Mueller, P., Newby, J., Orrell, J., O'Shaughnessy, C., Pentilla, S., Patton, K., Poon, A. W., Radford, D., Reyna, D., Ray, H., Scholberg, K., Sosnovtsev, V., Tayloe, R., Vetter, K., Virtue, C., Wilkerson, J., Yoo, J., and Yu, C. H.

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

The Spallation Neutron Source (SNS) at Oak Ridge National Laboratory, Tennessee, provides an intense flux of neutrinos in the few tens-of-MeV range, with a sharply-pulsed timing structure that is beneficial for background rejection. In this white paper, we describe how the SNS source can be used for a measurement of coherent elastic neutrino-nucleus scattering (CENNS), and the physics reach of different phases of such an experimental program (CSI: Coherent Scattering Investigations at the SNS)., Comment: Snowmass white paper

Published
2013

19. Systematic study of trace radioactive impurities in candidate construction materials for EXO-200

Author

Leonard, D. S., Grinberg, P., Weber, P., Baussan, E., Djurcic, Z., Keefer, G., Piepke, A., Pocar, A., Vuilleumier, J. -L., Vuilleumier, J. -M., Akimov, D., Bellerive, A., Bowcock, M., Breidenbach, M., Burenkov, A., Conley, R., Craddock, W., Danilov, M., DeVoe, R., Dixit, M., Dolgolenko, A., Ekchtout, I., Fairbank Jr., W., Farine, J., Fierlinger, P., Flatt, B., Gratta, G., Green, M., Hall, C., Hall, K., Hallman, D., Hargrove, C., Herbst, R., Hodgson, J., Jeng, S., Kolkowitz, S., Kovalenko, A., Kovalenko, D., LePort, F., Mackay, D., Moe, M., Díez, M. Montero, Neilson, R., Odian, A., O'Sullivan, K., Ounalli, L., Prescott, C. Y., Rowson, P. C., Schenker, D., Sinclair, D., Skarpaas, K., Smirnov, G., Stekhanov, V., Strickland, V., Virtue, C., Wamba, K., and Wodin, J.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

The Enriched Xenon Observatory (EXO) will search for double beta decays of 136Xe. We report the results of a systematic study of trace concentrations of radioactive impurities in a wide range of raw materials and finished parts considered for use in the construction of EXO-200, the first stage of the EXO experimental program. Analysis techniques employed, and described here, include direct gamma counting, alpha counting, neutron activation analysis, and high-sensitivity mass spectrometry., Comment: 32 pages, 6 figures. Expanded introduction, added missing table entry. Accepted for publication in Nucl. Instrum. Meth. A

Published
2007
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20. A linear RFQ ion trap for the Enriched Xenon Observatory

Author

Flatt, B., Green, M., Wodin, J., DeVoe, R., Fierlinger, P., Gratta, G., LePort, F., Diez, M. Montero, Neilson, R., OSullivan, K., Pocar, A., Waldman, S., Baussan, E., Breidenbach, M., Conley, R., Fairbank Jr., W., Farine, J., Hall, C., Hall, K., Hallman, D., Hargrove, C., Hauger, M., Hodgson, J., Juget, F., Leonard, D. S., Mackay, D., Martin, Y., Mong, B., Odian, A., Ounalli, L., Piepke, A., Prescott, C. Y., Rowson, P. C., Skarpass, K., Schenker, D., Sinclair, D., Strickland, V., Virtue, C., Vuilleuimier, J. -L., Vuilleuimier, J. -M., Wamba, K., and Weber, P.

Subjects
Physics - Instrumentation and Detectors
Abstract

The design, construction, and performance of a linear radio-frequency ion trap (RFQ) intended for use in the Enriched Xenon Observatory (EXO) are described. EXO aims to detect the neutrinoless double-beta decay of $^{136}$Xe to $^{136}$Ba. To suppress possible backgrounds EXO will complement the measurement of decay energy and, to some extent, topology of candidate events in a Xe filled detector with the identification of the daughter nucleus ($^{136}$Ba). The ion trap described here is capable of accepting, cooling, and confining individual Ba ions extracted from the site of the candidate double-beta decay event. A single trapped ion can then be identified, with a large signal-to-noise ratio, via laser spectroscopy., Comment: 18 pages, pdflatex, submitted to NIM A

Published
2007
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21. A liquid xenon ionization chamber in an all-fluoropolymer vessel

Author

EXO Collaboration, LePort, F., Pocar, A., Bartoszek, L., DeVoe, R., Fierlinger, P., Flatt, B., Gratta, G., Green, M., Koffas, T., Diez, M. Montero, Neilson, R., O'Sullivan, K., Waldman, S., Wodin, J., Woisard, D., Baussan, E., Breidenbach, M., Conley, R., Fairbank Jr., W., Farine, J., Hall, C., Hall, K., Hallman, D., Hargrove, C., Hodgson, J., Jeng, S., Leonard, D. S., Mackay, D., Martin, Y., Odian, A., Ounalli, L., Piepke, A., Prescott, C. Y., Rowson, P. C., Skarpaas, K., Schenker, D., Sinclair, D., Stekhanov, V., Strickland, V., Virtue, C., Vuilleumier, J. -L., Vuilleumier, J. -M., Wamba, K., and Weber, P.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

A novel technique has been developed to build vessels for liquid xenon ionization detectors entirely out of ultra-clean fluoropolymer. We describe the advantages in terms of low radioactivity contamination, provide some details of the construction techniques, and show the energy resolution achieved with a prototype all-fluoropolymer ionization detector., Comment: 12 pages, 9 figures

Published
2006
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