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1. Particle Physics at the European Spallation Source

Author

Abele, H., Alekou, A., Algora, A., Andersen, K., Baessler, S., Barron-Palos, L., Barrow, J., Baussan, E., Bentley, P., Berezhiani, Z., Bessler, Y., Bhattacharyya, A. K., Bianchi, A., Bijnens, J., Blanco, C., Kraljevic, N. Blaskovic, Blennow, M., Bodek, K., Bogomilov, M., Bohm, C., Bolling, B., Bouquerel, E., Brooijmans, G., Broussard, L. J., Buchan, O., Burgman, A., Calen, H., Carlile, C. J., Cederkall, J., Chanel, E., Christiansen, P., Cirigliano, V., Collar, J. I., Collins, M., Crawford, C. B., Morales, E. Cristaldo, Cupial, P., D'Alessi, L., Damian, J. I. M., Danared, H., Dancila, D., de Andre, J. P. A. M., Delahaye, J. P., Degenkolb, S., Di Julio, D. D., Dracos, M., Dunne, K., Efthymiopoulos, I., Ekelof, T., Eklund, L., Eshraqi, M., Esteban, I., Fanourakis, G., Farricker, A., Fernandez-Martinez, E., Ferreira, M. J., Fertl, M., Fierlinger, P., Folsom, B., Frank, A., Fratangelo, A., Friman-Gayer, U., Fukuda, T., Fynbo, H . O . U., Sosa, A. Garcia, Gazis, N., Galnander, B., Geralis, Th., Ghosh, M., Gokbulut, G., Gomez-Cadenas, J . J., Gonzalez-Alonso, M., Gonzalez, F., Halic, L., Happe, C., Heil, P., Heinz, A., Herde, H., Holl, M., Jenke, T., Jenssen, M., Jericha, E., Johansson, H. T., Johansson, R., Johansson, T., Kamyshkov, Y., Topaksu, A. Kayis, Kildetoft, B., Kirch, K., Klicek, B., Klinkby, E., Kolevatov, R., Konrad, G., Koziol, M., Krhac, K., Kupsc, A., Lacny, L., Larizgoitia, L., Lewis, C. M., Lindroos, M., Lychagin, E., Lytken, E., Maiano, C., Marciniewski, P., Markaj, G., Markisch, B., Marrelli, C., Martins, C., Meirose, B., Mezzetto, M., Milas, N., Milstead, D., Monrabal, F., Muhrer, G., Nepomuceno, A., Nesvizhevsky, V., Nilsson, T., Novella, P., Oglakci, M., Ohlsson, T., Olvegard, M., Oskarsson, A., Ota, T., Park, J., Patrzalek, D., Perrey, H., Persoz, M., Petkov, G., Piegsa, F. M., Pistillo, C., Poussot, P., Privitera, P., Rataj, B., Ries, D., Rizzi, N., Rosauro-Alcaraz, S., Rozpedzik, D., Saiang, D., Santoro, V., Schmidt, U., Schober, H., Schulthess, I., Silverstein, S., Simon, A., Sina, H., Snamina, J., Snow, W. M., Soldner, T., Stavropoulos, G., Stipcevic, M., Szybinski, B., Takibayev, A., Tang, Z., Tarkeshian, R., Theroine, C., Thorne, J., Terranova, F., Thomas, J., Tolba, T., Torres-Sanchez, P., Trachanas, E., Tsenov, R., Uggerhoj, U. I., Vankova-Kirilova, G., Vassilopoulos, N., Wagner, R., Wang, X., Wildner, E., Wolke, M., Wurtz, J., Yiu, S. C., Yoon, S. G., Young, A. R., Zanini, L., Zejma, J., Zerzion, D., Zimmer, O., Zormpa, O., and Zou, Y.

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

Presently under construction in Lund, Sweden, the European Spallation Source (ESS) will be the world's brightest neutron source. As such, it has the potential for a particle physics program with a unique reach and which is complementary to that available at other facilities. This paper describes proposed particle physics activities for the ESS. These encompass the exploitation of both the neutrons and neutrinos produced at the ESS for high precision (sensitivity) measurements (searches)., Comment: 121 pages, updated version after referee comments

Published
2022
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2. Temperature dependence of the probability of 'small heating' and total losses of ucns on the surface of fomblin oils of different molecular mass

Author

Cherniavsky, S. M., Lychagin, E. V., Muzychka, A. Yu., Nekhaev, G. V., Nesvizhevsky, V. V., Reynaud, S., Strelkov, A. V., and Turlybekuly, K.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

We measured the temperature dependence of the probability of small heating and total losses of UCNs on the PFPE Fomblin Y surface with various molecular masses Mw=2800, 3300, 6500 amu in the temperature range of 100-300 K. The probability of small heating sharply decreases with increasing Mw and decreasing temperature. The probability of total loss weakly decreases with decreasing temperature and takes the minimum value at Mw=3300 amu. As this oil provides a homogeneous surface with minimal probabilities of small heating and total losses of UCNs, it is the preferred candidate for experiments on measuring the neutron lifetime.

Published
2019
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3. Temperature dependence of the probability of 'small heating' and spectrum of UCNs up-scattered on the surface of Fomblin oil Y-HVAC 18/8

Author

Nesvizhevsky, V. V., Voronin, A. Yu., Lambrecht, A., Reynaud, S., Lychagin, E. V., Muzychka, A. Yu., Nekhaev, G. V., and Strelkov, A. V.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

We performed precision measurements of the probability of small heating and spectrum of UCNs up-scattered on the surface of hydrogen-free oil Fomblin Y-HVAC 18/8 as a function of temperature. The probability is well reproducible, does not depend on sample thickness and does not evolve in time. It is equal (9.8+-0.2)10^(-6) at the ambient temperature. The spectrum coincides with those measured with solid-surface and nanoparticle samples. Indirect arguments indicate that spectrum shape weakly depends on temperature. Measured experimental data can be satisfactory described both within the model of near-surface nanodroplets and the model of capillary waves.

Published
2016

4. UCN sources at external beams of thermal neutrons. An example of PIK reactor

Author

Lychagin, E. V., Mityukhlyaev, V. A., Muzychka, A. Yu., Nekhaev, G. V., Nesvizhevsky, V. V., Onegin, M. S., Sharapov, E. I., and Strelkov, A. V.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

We consider ultracold neutron (UCN) sources based on a new method of UCN production in superfluid helium (4He). The PIK reactor is chosen as a perspective example of the application of this idea, which consists of installing a 4He UCN source in a beam of thermal or cold neutrons and surrounding the source with a moderator-reflector, which plays the role of a source of cold neutrons (CNs) feeding the UCN source. The CN flux in the source can be several times larger than the incident flux, due to multiple neutron reflections from the moderator-reflector. We show that such a source at the PIK reactor would provide an order of magnitude larger density and production rate than an analogous source at the ILL reactor. We estimate parameters of a 4He source with solid methane (CH4) or/and liquid deuterium (D2) moderator-reflector. We show that such a source with CH4 moderator-reflector at the PIK reactor would provide the UCN density of ~1x10^5 1/cm^3, and the UCN production rate of ~2x10^7 1/s. These values are respectively 1000 and 20 times larger than those for the most intense UCN user source. The UCN density in a source with D2 moderator-reflector would reach the value of ~2x10^5 1/cm^3, and the UCN production rate would be equal ~8x10^7 1/s. Installation of such sources in beams of CNs with equal flux would slightly increase the density and production rate., Comment: 15 pages, 14 figures

Published
2015
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5. Quantum levitation of nanoparticles seen with ultracold neutrons

Author

Nesvizhevsky, V. V., Voronin, A. Yu., Lambrecht, A., Reynaud, S., Lychagin, E. V., Muzychka, A. Yu., and Strelkov, A. V.

Subjects
Condensed Matter - Other Condensed Matter, Quantum Physics
Abstract

Analyzing new experiments with ultracold neutrons (UCNs) we show that physical adsorption of nanoparticles/nano-droplets, levitating in high-excited states in a deep and broad potential well formed by van der Waals/Casimir-Polder (vdW/CP) forces results in new effects on a cross-road of fundamental interactions, neutron, surface and nanoparticle physics. Accounting for the interaction of UCNs with nanoparticles explains a recently discovered intriguing small heating of UCNs in traps. It might be relevant to the striking conflict of the neutron lifetime experiments with smallest reported uncertainties by adding false effects there., Comment: 5 pages, 4 figures

Published
2012
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6. Quasi-specular albedo of cold neutrons from powder of nanoparticles

Author

Cubitt, R., Lychagin, E. V., Muzychka, A. Yu., Nekhaev, G. V., Nesvizhevsky, V. V., Pignol, G., Protasov, K. V., and Strelkov, A. V.

Subjects
Nuclear Experiment
Abstract

We predicted and observed for the first time the quasi-specular albedo of cold neutrons at small incidence angles from a powder of nanoparticles. This albedo (reflection) is due to multiple neutron small-angle scattering. The reflection angle as well as the half-width of angular distribution of reflected neutrons is approximately equal to the incidence angle. The measured reflection probability was equal to ~30% within the detector angular size that corresponds to 40-50% total calculated probability of quasi-specular reflection.

Published
2009
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7. Particle physics at the European Spallation Source

Author

Abele, H, Alekou, A, Algora, A, Andersen, K, Baessler, S, Barron-Palos, L, Barrow, J, Baussan, E, Bentley, P, Berezhiani, Z, Bessler, Y, Bhattacharyya, A, Bianchi, A, Bijnens, J, Blanco, C, Kraljevic, N, Blennow, M, Bodek, K, Bogomilov, M, Bohm, C, Bolling, B, Bouquerel, E, Brooijmans, G, Broussard, L, Buchan, O, Burgman, A, Calen, H, Carlile, C, Cederkall, J, Chanel, E, Christiansen, P, Cirigliano, V, Collar, J, Collins, M, Crawford, C, Morales, E, Cupial, P, D'Alessi, L, Damian, J, Danared, H, Dancila, D, de Andre, J, Delahaye, J, Degenkolb, S, Di Julio, D, Dracos, M, Dunne, K, Efthymiopoulos, I, Ekelof, T, Eklund, L, Eshraqi, M, Esteban, I, Fanourakis, G, Farricker, A, Fernandez-Martinez, E, Ferreira, M, Fertl, M, Fierlinger, P, Folsom, B, Frank, A, Fratangelo, A, Friman-Gayer, U, Fukuda, T, Fynbo, H, Sosa, A, Gazis, N, Galnander, B, Geralis, T, Ghosh, M, Gokbulut, G, Gomez-Cadenas, J, Gonzalez-Alonso, M, Gonzalez, F, Halic, L, Happe, C, Heil, P, Heinz, A, Herde, H, Holl, M, Jenke, T, Jenssen, M, Jericha, E, Johansson, H, Johansson, R, Johansson, T, Kamyshkov, Y, Topaksu, A, Kildetoft, B, Kirch, K, Klicek, B, Klinkby, E, Kolevatov, R, Konrad, G, Koziol, M, Krhac, K, Kupsc, A, Lacny, L, Larizgoitia, L, Lewis, C, Lindroos, M, Lychagin, E, Lytken, E, Maiano, C, Marciniewski, P, Markaj, G, Markisch, B, Marrelli, C, Martins, C, Meirose, B, Mezzetto, M, Milas, N, Milstead, D, Monrabal, F, Muhrer, G, Nepomuceno, A, Nesvizhevsky, V, Nilsson, T, Novella, P, Oglakci, M, Ohlsson, T, Olvegard, M, Oskarsson, A, Ota, T, Park, J, Patrzalek, D, Perrey, H, Persoz, M, Petkov, G, Piegsa, F, Pistillo, C, Poussot, P, Privitera, P, Rataj, B, Ries, D, Rizzi, N, Rosauro-Alcaraz, S, Rozpedzik, D, Saiang, D, Santoro, V, Schmidt, U, Schober, H, Schulthess, I, Silverstein, S, Simon, A, Sina, H, Snamina, J, Snow, W, Soldner, T, Stavropoulos, G, Stipcevic, M, Szybinski, B, Takibayev, A, Tang, Z, Tarkeshian, R, Theroine, C, Thorne, J, Terranova, F, Thomas, J, Tolba, T, Torres-Sanchez, P, Trachanas, E, Tsenov, R, Uggerhoj, U, Vankova-Kirilova, G, Vassilopoulos, N, Wagner, R, Wang, X, Wildner, E, Wolke, M, Wurtz, J, Yiu, S, Yoon, S, Young, A, Zanini, L, Zejma, J, Zerzion, D, Zimmer, O, Zormpa, O, Zou, Y, Abele H., Alekou A., Algora A., Andersen K., Baessler S., Barron-Palos L., Barrow J., Baussan E., Bentley P., Berezhiani Z., Bessler Y., Bhattacharyya A. K., Bianchi A., Bijnens J., Blanco C., Kraljevic N. B., Blennow M., Bodek K., Bogomilov M., Bohm C., Bolling B., Bouquerel E., Brooijmans G., Broussard L. J., Buchan O., Burgman A., Calen H., Carlile C. J., Cederkall J., Chanel E., Christiansen P., Cirigliano V., Collar J. I., Collins M., Crawford C. B., Morales E. C., Cupial P., D'Alessi L., Damian J. I. M., Danared H., Dancila D., de Andre J. P. A. M., Delahaye J. P., Degenkolb S., Di Julio D. D., Dracos M., Dunne K., Efthymiopoulos I., Ekelof T., Eklund L., Eshraqi M., Esteban I., Fanourakis G., Farricker A., Fernandez-Martinez E., Ferreira M. J., Fertl M., Fierlinger P., Folsom B., Frank A., Fratangelo A., Friman-Gayer U., Fukuda T., Fynbo H. O. U., Sosa A. G., Gazis N., Galnander B., Geralis T., Ghosh M., Gokbulut G., Gomez-Cadenas J. J., Gonzalez-Alonso M., Gonzalez F., Halic L., Happe C., Heil P., Heinz A., Herde H., Holl M., Jenke T., Jenssen M., Jericha E., Johansson H. T., Johansson R., Johansson T., Kamyshkov Y., Topaksu A. K., Kildetoft B., Kirch K., Klicek B., Klinkby E., Kolevatov R., Konrad G., Koziol M., Krhac K., Kupsc A., Lacny L., Larizgoitia L., Lewis C. M., Lindroos M., Lychagin E., Lytken E., Maiano C., Marciniewski P., Markaj G., Markisch B., Marrelli C., Martins C., Meirose B., Mezzetto M., Milas N., Milstead D., Monrabal F., Muhrer G., Nepomuceno A., Nesvizhevsky V., Nilsson T., Novella P., Oglakci M., Ohlsson T., Olvegard M., Oskarsson A., Ota T., Park J., Patrzalek D., Perrey H., Persoz M., Petkov G., Piegsa F. M., Pistillo C., Poussot P., Privitera P., Rataj B., Ries D., Rizzi N., Rosauro-Alcaraz S., Rozpedzik D., Saiang D., Santoro V., Schmidt U., Schober H., Schulthess I., Silverstein S., Simon A., Sina H., Snamina J., Snow W. M., Soldner T., Stavropoulos G., Stipcevic M., Szybinski B., Takibayev A., Tang Z., Tarkeshian R., Theroine C., Thorne J., Terranova F., Thomas J., Tolba T., Torres-Sanchez P., Trachanas E., Tsenov R., Uggerhoj U. I., Vankova-Kirilova G., Vassilopoulos N., Wagner R., Wang X., Wildner E., Wolke M., Wurtz J., Yiu S. C., Yoon S. G., Young A. R., Zanini L., Zejma J., Zerzion D., Zimmer O., Zormpa O., Zou Y., Abele, H, Alekou, A, Algora, A, Andersen, K, Baessler, S, Barron-Palos, L, Barrow, J, Baussan, E, Bentley, P, Berezhiani, Z, Bessler, Y, Bhattacharyya, A, Bianchi, A, Bijnens, J, Blanco, C, Kraljevic, N, Blennow, M, Bodek, K, Bogomilov, M, Bohm, C, Bolling, B, Bouquerel, E, Brooijmans, G, Broussard, L, Buchan, O, Burgman, A, Calen, H, Carlile, C, Cederkall, J, Chanel, E, Christiansen, P, Cirigliano, V, Collar, J, Collins, M, Crawford, C, Morales, E, Cupial, P, D'Alessi, L, Damian, J, Danared, H, Dancila, D, de Andre, J, Delahaye, J, Degenkolb, S, Di Julio, D, Dracos, M, Dunne, K, Efthymiopoulos, I, Ekelof, T, Eklund, L, Eshraqi, M, Esteban, I, Fanourakis, G, Farricker, A, Fernandez-Martinez, E, Ferreira, M, Fertl, M, Fierlinger, P, Folsom, B, Frank, A, Fratangelo, A, Friman-Gayer, U, Fukuda, T, Fynbo, H, Sosa, A, Gazis, N, Galnander, B, Geralis, T, Ghosh, M, Gokbulut, G, Gomez-Cadenas, J, Gonzalez-Alonso, M, Gonzalez, F, Halic, L, Happe, C, Heil, P, Heinz, A, Herde, H, Holl, M, Jenke, T, Jenssen, M, Jericha, E, Johansson, H, Johansson, R, Johansson, T, Kamyshkov, Y, Topaksu, A, Kildetoft, B, Kirch, K, Klicek, B, Klinkby, E, Kolevatov, R, Konrad, G, Koziol, M, Krhac, K, Kupsc, A, Lacny, L, Larizgoitia, L, Lewis, C, Lindroos, M, Lychagin, E, Lytken, E, Maiano, C, Marciniewski, P, Markaj, G, Markisch, B, Marrelli, C, Martins, C, Meirose, B, Mezzetto, M, Milas, N, Milstead, D, Monrabal, F, Muhrer, G, Nepomuceno, A, Nesvizhevsky, V, Nilsson, T, Novella, P, Oglakci, M, Ohlsson, T, Olvegard, M, Oskarsson, A, Ota, T, Park, J, Patrzalek, D, Perrey, H, Persoz, M, Petkov, G, Piegsa, F, Pistillo, C, Poussot, P, Privitera, P, Rataj, B, Ries, D, Rizzi, N, Rosauro-Alcaraz, S, Rozpedzik, D, Saiang, D, Santoro, V, Schmidt, U, Schober, H, Schulthess, I, Silverstein, S, Simon, A, Sina, H, Snamina, J, Snow, W, Soldner, T, Stavropoulos, G, Stipcevic, M, Szybinski, B, Takibayev, A, Tang, Z, Tarkeshian, R, Theroine, C, Thorne, J, Terranova, F, Thomas, J, Tolba, T, Torres-Sanchez, P, Trachanas, E, Tsenov, R, Uggerhoj, U, Vankova-Kirilova, G, Vassilopoulos, N, Wagner, R, Wang, X, Wildner, E, Wolke, M, Wurtz, J, Yiu, S, Yoon, S, Young, A, Zanini, L, Zejma, J, Zerzion, D, Zimmer, O, Zormpa, O, Zou, Y, Abele H., Alekou A., Algora A., Andersen K., Baessler S., Barron-Palos L., Barrow J., Baussan E., Bentley P., Berezhiani Z., Bessler Y., Bhattacharyya A. K., Bianchi A., Bijnens J., Blanco C., Kraljevic N. B., Blennow M., Bodek K., Bogomilov M., Bohm C., Bolling B., Bouquerel E., Brooijmans G., Broussard L. J., Buchan O., Burgman A., Calen H., Carlile C. J., Cederkall J., Chanel E., Christiansen P., Cirigliano V., Collar J. I., Collins M., Crawford C. B., Morales E. C., Cupial P., D'Alessi L., Damian J. I. M., Danared H., Dancila D., de Andre J. P. A. M., Delahaye J. P., Degenkolb S., Di Julio D. D., Dracos M., Dunne K., Efthymiopoulos I., Ekelof T., Eklund L., Eshraqi M., Esteban I., Fanourakis G., Farricker A., Fernandez-Martinez E., Ferreira M. J., Fertl M., Fierlinger P., Folsom B., Frank A., Fratangelo A., Friman-Gayer U., Fukuda T., Fynbo H. O. U., Sosa A. G., Gazis N., Galnander B., Geralis T., Ghosh M., Gokbulut G., Gomez-Cadenas J. J., Gonzalez-Alonso M., Gonzalez F., Halic L., Happe C., Heil P., Heinz A., Herde H., Holl M., Jenke T., Jenssen M., Jericha E., Johansson H. T., Johansson R., Johansson T., Kamyshkov Y., Topaksu A. K., Kildetoft B., Kirch K., Klicek B., Klinkby E., Kolevatov R., Konrad G., Koziol M., Krhac K., Kupsc A., Lacny L., Larizgoitia L., Lewis C. M., Lindroos M., Lychagin E., Lytken E., Maiano C., Marciniewski P., Markaj G., Markisch B., Marrelli C., Martins C., Meirose B., Mezzetto M., Milas N., Milstead D., Monrabal F., Muhrer G., Nepomuceno A., Nesvizhevsky V., Nilsson T., Novella P., Oglakci M., Ohlsson T., Olvegard M., Oskarsson A., Ota T., Park J., Patrzalek D., Perrey H., Persoz M., Petkov G., Piegsa F. M., Pistillo C., Poussot P., Privitera P., Rataj B., Ries D., Rizzi N., Rosauro-Alcaraz S., Rozpedzik D., Saiang D., Santoro V., Schmidt U., Schober H., Schulthess I., Silverstein S., Simon A., Sina H., Snamina J., Snow W. M., Soldner T., Stavropoulos G., Stipcevic M., Szybinski B., Takibayev A., Tang Z., Tarkeshian R., Theroine C., Thorne J., Terranova F., Thomas J., Tolba T., Torres-Sanchez P., Trachanas E., Tsenov R., Uggerhoj U. I., Vankova-Kirilova G., Vassilopoulos N., Wagner R., Wang X., Wildner E., Wolke M., Wurtz J., Yiu S. C., Yoon S. G., Young A. R., Zanini L., Zejma J., Zerzion D., Zimmer O., Zormpa O., and Zou Y.

Abstract

Presently under construction in Lund, Sweden, the European Spallation Source (ESS) will be the world's brightest neutron source. As such, it has the potential for a particle physics program with a unique reach and which is complementary to that available at other facilities. This paper describes proposed particle physics activities for the ESS. These encompass the exploitation of both the neutrons and neutrinos produced at the ESS for high precision (sensitivity) measurements (searches).

Published
2023

8. Storage of very cold neutrons in a trap with nano-structured walls

Author

Lychagin, E. V., Muzychka, A. Yu., Nesvizhevsky, V. V., Pignol, G., Protasov, K. V., and Strelkov, A. V.

Subjects
Nuclear Experiment
Abstract

We report on storage of Very Cold Neutrons (VCN) in a trap with walls containing powder of diamond nanoparticles. The efficient VCN reflection is provided by multiple diffusive elastic scattering of VCN at single nanoparticles in powder. The VCN storage times are sufficiently long for accumulating large density of neutrons with complete VCN energy range of up to a few times 10(-4) eV. Methods for further improvements of VCN storage times are discussed.

Published
2008
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9. The reflection of very cold neutrons from diamond powder nanoparticles

Author

Nesvizhevsky, V. V., Lychagin, E. V., Muzychka, A. Yu., Strelkov, A. V., Pignol, G., and Protasov, K. V.

Subjects
Nuclear Experiment
Abstract

We study possibility of efficient reflection of very cold neutrons (VCN) from powders of nanoparticles. In particular, we measured the scattering of VCN at a powder of diamond nanoparticles as a function of powder sample thickness, neutron velocity and scattering angle. We observed extremely intense scattering of VCN even off thin powder samples. This agrees qualitatively with the model of independent nanoparticles at rest. We show that this intense scattering would allow us to use nanoparticle powders very efficiently as the very first reflectors for neutrons with energies within a complete VCN range up to $10^{-4}$ eV.

Published
2008
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10. Particle physics at the European Spallation Source

Author

Abele, H., primary, Alekou, A., additional, Algora, A., additional, Andersen, K., additional, Baeßler, S., additional, Barron-Pálos, L., additional, Barrow, J., additional, Baussan, E., additional, Bentley, P., additional, Berezhiani, Z., additional, Beßler, Y., additional, Bhattacharyya, A.K., additional, Bianchi, A., additional, Bijnens, J., additional, Blanco, C., additional, Kraljevic, N. Blaskovic, additional, Blennow, M., additional, Bodek, K., additional, Bogomilov, M., additional, Bohm, C., additional, Bolling, B., additional, Bouquerel, E., additional, Brooijmans, G., additional, Broussard, L.J., additional, Buchan, O., additional, Burgman, A., additional, Calén, H., additional, Carlile, C.J., additional, Cederkall, J., additional, Chanel, E., additional, Christiansen, P., additional, Cirigliano, V., additional, Collar, J.I., additional, Collins, M., additional, Crawford, C.B., additional, Morales, E. Cristaldo, additional, Cupiał, P., additional, D’Alessi, L., additional, Damian, J.I. M., additional, Danared, H., additional, Dancila, D., additional, de André, J.P.A.M., additional, Delahaye, J.P., additional, Degenkolb, S., additional, Di Julio, D.D., additional, Dracos, M., additional, Dunne, K., additional, Efthymiopoulos, I., additional, Ekelöf, T., additional, Eklund, L., additional, Eshraqi, M., additional, Esteban, I., additional, Fanourakis, G., additional, Farricker, A., additional, Fernandez-Martinez, E., additional, Ferreira, M.J., additional, Fertl, M., additional, Fierlinger, P., additional, Folsom, B., additional, Frank, A., additional, Fratangelo, A., additional, Friman-Gayer, U., additional, Fukuda, T., additional, Fynbo, H.O.U., additional, Sosa, A. Garcia, additional, Gazis, N., additional, Gålnander, B., additional, Geralis, Th., additional, Ghosh, M., additional, Gokbulut, G., additional, Gomez-Cadenas, J.J., additional, Gonzalez-Alonso, M., additional, Gonzalez, F., additional, Halić, L., additional, Happe, C., additional, Heil, P., additional, Heinz, A., additional, Herde, H., additional, Holl, M., additional, Jenke, T., additional, Jenssen, M., additional, Jericha, E., additional, Johansson, H.T., additional, Johansson, R., additional, Johansson, T., additional, Kamyshkov, Y., additional, Topaksu, A. Kayis, additional, Kildetoft, B., additional, Kirch, K., additional, Kliček, B., additional, Klinkby, E., additional, Kolevatov, R., additional, Konrad, G., additional, Kozioł, M., additional, Krhač, K., additional, Kupść, A., additional, Łacny, Ł., additional, Larizgoitia, L., additional, Lewis, C.M., additional, Lindroos, M., additional, Lychagin, E., additional, Lytken, E., additional, Maiano, C., additional, Marciniewski, P., additional, Markaj, G., additional, Märkisch, B., additional, Marrelli, C., additional, Martins, C., additional, Meirose, B., additional, Mezzetto, M., additional, Milas, N., additional, Milstead, D., additional, Monrabal, F., additional, Muhrer, G., additional, Nepomuceno, A., additional, Nesvizhevsky, V., additional, Nilsson, T., additional, Novella, P., additional, Oglakci, M., additional, Ohlsson, T., additional, Olvegård, M., additional, Oskarsson, A., additional, Ota, T., additional, Park, J., additional, Patrzalek, D., additional, Perrey, H., additional, Persoz, M., additional, Petkov, G., additional, Piegsa, F.M., additional, Pistillo, C., additional, Poussot, P., additional, Privitera, P., additional, Rataj, B., additional, Ries, D., additional, Rizzi, N., additional, Rosauro-Alcaraz, S., additional, Rozpedzik, D., additional, Saiang, D., additional, Santoro, V., additional, Schmidt, U., additional, Schober, H., additional, Schulthess, I., additional, Silverstein, S., additional, Simón, A., additional, Sina, H., additional, Snamina, J., additional, Snow, W.M., additional, Soldner, T., additional, Stavropoulos, G., additional, Stipčević, M., additional, Szybiński, B., additional, Takibayev, A., additional, Tang, Z., additional, Tarkeshian, R., additional, Theroine, C., additional, Thorne, J., additional, Terranova, F., additional, Thomas, J., additional, Tolba, T., additional, Torres-Sánchez, P., additional, Trachanas, E., additional, Tsenov, R., additional, Uggerhøj, U.I., additional, Vankova-Kirilova, G., additional, Vassilopoulos, N., additional, Wagner, R., additional, Wang, X., additional, Wildner, E., additional, Wolke, M., additional, Wurtz, J., additional, Yiu, S.C., additional, Yoon, S.G., additional, Young, A.R., additional, Zanini, L., additional, Zejma, J., additional, Zerzion, D., additional, Zimmer, O., additional, Zormpa, O., additional, and Zou, Y., additional

Published
2023
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11. Particle physics at the European Spallation Source

Author

Abele, H., Alekou, A., Algora, A., Andersen, K., Baessler, S., Barron-Palos, L., Barrow, J., Baussan, E., Bentley, P., Berezhiani, Z., Bessler, Y., Bhattacharyya, A. K., Bianchi, A., Bijnens, J., Blanco, C., Kraljevic, N. Blaskovic, Blennow, M., Bodek, K., Bogomilov, M., Bohm, C., Bolling, B., Bouquerel, E., Brooijmans, G., Broussard, L. J., Buchan, O., Burgman, A., Calén, Hans, Carlile, Colin J., Cederkall, J., Chanel, E., Christiansen, P., Cirigliano, V., Collar, J. I., Collins, M., Crawford, C. B., Morales, E. Cristaldo, Cupial, P., D'Alessi, L., Damian, J. I. M., Danared, H., Dancila, Dragos, de Andre, J. P. A. M., Delahaye, J. P., Degenkolb, S., Di Julio, D. D., Dracos, M., Dunne, K., Efthymiopoulos, I., Ekelöf, Tord, Eklund, Lars, Eshraqi, M., Esteban, I., Fanourakis, G., Farricker, A., Fernandez-Martinez, E., Ferreira, J., Fertl, M., Fierlinger, P., Folsom, B., Frank, A., Fratangelo, A., Friman-Gayer, U., Fukuda, T., Fynbo, H. O. U., Sosa, A. Garcia, Gazis, N., Galnander, B., Geralis, Th., Ghosh, M., Gokbulut, G., Gomez-Cadenas, J. J., Gonzalez-Alonso, M., Gonzalez, F., Halic, L., Happe, C., Heil, P., Heinz, A., Herde, H., Holl, M., Jenke, T., Jenssen, M., Jericha, E., Johansson, H. T., Johansson, R., Johansson, Tord, Kamyshkov, Y., Topaksu, A. Kayis, Kildetoft, B., Kirch, K., Klicek, B., Klinkby, E., Kolevatov, R., Konrad, G., Koziol, M., Krhac, K., Kupść, Andrzej, Lacny, L., Larizgoitia, L., Lewis, C. M., Lindroos, M., Lychagin, E., Lytken, E., Maiano, C., Marciniewski, Pawel, Markaj, G., Markisch, B., Marrelli, C., Martins, C., Meirose, B., Mezzetto, M., Milas, N., Milstead, D., Monrabal, F., Muhrer, G., Nepomuceno, A., Nesvizhevsky, V., Nilsson, T., Novella, P., Oglakci, M., Ohlsson, T., Olvegård, Maja, Oskarsson, A., Ota, T., Park, J., Patrzalek, D., Perrey, H., Persoz, M., Petkov, G., Piegsa, F. M., Pistillo, C., Poussot, P., Privitera, P., Rataj, B., Ries, D., Rizzi, N., Rosauro-Alcaraz, S., Rozpedzik, D., Saiang, D., Santoro, V., Schmidt, U., Schober, H., Schulthess, I., Silverstein, S., Simon, A., Sina, H., Snamina, J., Snow, W. M., Soldner, T., Stavropoulos, G., Stipcevic, M., Szybinski, B., Takibayev, A., Tang, Z., Tarkeshian, R., Theroine, C., Thorne, J., Terranova, F., Thomas, J., Tolba, T., Torres-Sanchez, P., Trachanas, E., Tsenov, R., Uggerhoj, U. I., Vankova-Kirilova, G., Vassilopoulos, N., Wagner, R., Wang, X., Wildner, E., Wolke, Magnus, Wurtz, J., Yiu, S. C., Yoon, S. G., Young, A. R., Zanini, L., Zejma, J., Zerzion, D., Zimmer, O., Zormpa, O., Zou, Ye, Abele, H., Alekou, A., Algora, A., Andersen, K., Baessler, S., Barron-Palos, L., Barrow, J., Baussan, E., Bentley, P., Berezhiani, Z., Bessler, Y., Bhattacharyya, A. K., Bianchi, A., Bijnens, J., Blanco, C., Kraljevic, N. Blaskovic, Blennow, M., Bodek, K., Bogomilov, M., Bohm, C., Bolling, B., Bouquerel, E., Brooijmans, G., Broussard, L. J., Buchan, O., Burgman, A., Calén, Hans, Carlile, Colin J., Cederkall, J., Chanel, E., Christiansen, P., Cirigliano, V., Collar, J. I., Collins, M., Crawford, C. B., Morales, E. Cristaldo, Cupial, P., D'Alessi, L., Damian, J. I. M., Danared, H., Dancila, Dragos, de Andre, J. P. A. M., Delahaye, J. P., Degenkolb, S., Di Julio, D. D., Dracos, M., Dunne, K., Efthymiopoulos, I., Ekelöf, Tord, Eklund, Lars, Eshraqi, M., Esteban, I., Fanourakis, G., Farricker, A., Fernandez-Martinez, E., Ferreira, J., Fertl, M., Fierlinger, P., Folsom, B., Frank, A., Fratangelo, A., Friman-Gayer, U., Fukuda, T., Fynbo, H. O. U., Sosa, A. Garcia, Gazis, N., Galnander, B., Geralis, Th., Ghosh, M., Gokbulut, G., Gomez-Cadenas, J. J., Gonzalez-Alonso, M., Gonzalez, F., Halic, L., Happe, C., Heil, P., Heinz, A., Herde, H., Holl, M., Jenke, T., Jenssen, M., Jericha, E., Johansson, H. T., Johansson, R., Johansson, Tord, Kamyshkov, Y., Topaksu, A. Kayis, Kildetoft, B., Kirch, K., Klicek, B., Klinkby, E., Kolevatov, R., Konrad, G., Koziol, M., Krhac, K., Kupść, Andrzej, Lacny, L., Larizgoitia, L., Lewis, C. M., Lindroos, M., Lychagin, E., Lytken, E., Maiano, C., Marciniewski, Pawel, Markaj, G., Markisch, B., Marrelli, C., Martins, C., Meirose, B., Mezzetto, M., Milas, N., Milstead, D., Monrabal, F., Muhrer, G., Nepomuceno, A., Nesvizhevsky, V., Nilsson, T., Novella, P., Oglakci, M., Ohlsson, T., Olvegård, Maja, Oskarsson, A., Ota, T., Park, J., Patrzalek, D., Perrey, H., Persoz, M., Petkov, G., Piegsa, F. M., Pistillo, C., Poussot, P., Privitera, P., Rataj, B., Ries, D., Rizzi, N., Rosauro-Alcaraz, S., Rozpedzik, D., Saiang, D., Santoro, V., Schmidt, U., Schober, H., Schulthess, I., Silverstein, S., Simon, A., Sina, H., Snamina, J., Snow, W. M., Soldner, T., Stavropoulos, G., Stipcevic, M., Szybinski, B., Takibayev, A., Tang, Z., Tarkeshian, R., Theroine, C., Thorne, J., Terranova, F., Thomas, J., Tolba, T., Torres-Sanchez, P., Trachanas, E., Tsenov, R., Uggerhoj, U. I., Vankova-Kirilova, G., Vassilopoulos, N., Wagner, R., Wang, X., Wildner, E., Wolke, Magnus, Wurtz, J., Yiu, S. C., Yoon, S. G., Young, A. R., Zanini, L., Zejma, J., Zerzion, D., Zimmer, O., Zormpa, O., and Zou, Ye

Abstract

Presently under construction in Lund, Sweden, the European Spallation Source (ESS) will be the world’s brightest neutron source. As such, it has the potential for a particle physics program with a unique reach and which is complementary to that available at other facilities. This paper describes proposed particle physics activities for the ESS. These encompass the exploitation of both the neutrons and neutrinos produced at the ESS for high precision (sensitivity) measurements (searches).

Published
2023
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22. Effect of particle sizes on the efficiency of fluorinated nanodiamond neutron reflectors

Author

Aleksenskii, A., Bleuel, M., Bosak, A., Chumakova, A., Dideikin, A., Dubois, M., Korobkina, E., Lychagin, E., Muzychka, A., Nekhaev, G., Nesvizhevsky, V., Nezvanov, A., Schweins, R., Shvidchenko, A., Strelkov, A., Turlybekuly, K., Vul, A., Zhernenkov, K., Institut de Chimie de Clermont-Ferrand (ICCF), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne (UCA)-Institut national polytechnique Clermont Auvergne (INP Clermont Auvergne), and Université Clermont Auvergne (UCA)-Université Clermont Auvergne (UCA)

Subjects
Chemistry, detonation nanodiamonds, [CHIM]Chemical Sciences, nanopowder, reflectors of slow neutrons, QD1-999, Monte Carlo, Article, size separation of nanodiamonds, fluorination, albedo
Abstract

International audience; Over a decade ago, it was confirmed that detonation nanodiamond (DND) powders reflect very cold neutrons (VCNs) diffusively at any incidence angle and that they reflect cold neutrons quasi-specularly at small incidence angles. In the present publication, we report the results of a study on the effect of particle sizes on the overall efficiency of neutron reflectors made of DNDs. To perform this study, we separated, by centrifugation, the fraction of finer DND nanoparticles (which are referred to as S-DNDs here) from a broad initial size distribution and experimentally and theoretically compared the performance of such a neutron reflector with that from deagglomerated fluorinated DNDs (DF-DNDs). Typical commercially available DNDs with the size of ~4.3 nm are close to the optimum for VCNs with a typical velocity of ~50 m/s, while smaller and larger DNDs are more efficient for faster and slower VCN velocities, respectively. Simulations show that, for a realistic reflector geometry, the replacement of DF-DNDs (a reflector with the best achieved performance) by S-DNDs (with smaller size DNDs) increases the neutron albedo in the velocity range above ~60 m/s. This increase in the albedo results in an increase in the density of faster VCNs in such a reflector cavity of up to ~25% as well as an increase in the upper boundary of the velocities of efficient VCN reflection.

Published
2021
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23. Scientific program of DERICA—prospective accelerator and storage ring facility for radioactive ion beam research

Author

Grigorenko, L V, primary, Sharkov, B Yu, additional, Fomichev, A S, additional, Barabanov, A L, additional, Barth, W, additional, Bezbakh, A A, additional, Bogomolov, S L, additional, Golovkov, M S, additional, Gorshkov, A V, additional, Dmitriev, S N, additional, Eremin, V K, additional, Ershov, S N, additional, Zhukov, M V, additional, Kalagin, I V, additional, Karpov, A V, additional, Katayama, T, additional, Kiselev, O A, additional, Korsheninnikov, A A, additional, Krupko, S A, additional, Kulevoy, T V, additional, Litvinov, Yu A, additional, Lychagin, E V, additional, Maksimkin, I P, additional, Meshkov, I N, additional, Mukha, I G, additional, Nikolskii, E Yu, additional, Parfenova, Yu L, additional, Parkhomchuk, V V, additional, Polozov, S M, additional, Pfutzner, M, additional, Sidorchuk, S I, additional, Simon, H, additional, Slepnev, R S, additional, Ter-Akopian, G M, additional, Trubnikov, G V, additional, Chudoba, V, additional, Scheidenberger, C, additional, Sharov, P G, additional, Shatunov, P Yu, additional, Shatunov, Yu M, additional, Shvetsov, V N, additional, Shulgina, N B, additional, Yukhimchuk, A A, additional, and Yaramyshev, S, additional

Published
2019
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29. A direct measurement of the neutron-neutron scattering length

Author

Mitchell,G. E., Furman,W. I., Lychagin,E. V., Muzichka,A. Yu., Nekhaev,G. V., Strelkov,A. V., Sharapov,E. I., Shvetsov,V. N., Levakov,B. G., Litvin,V. I., Lyzhin,A. E., Magda,E. P., Crawford,B. E., Stephenson,S. L., Howell,C. R., and Tornow,W

Subjects
Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Nuclear Experiment
Abstract

A direct measurement of nn-scattering by colliding free neutrons has never been performed. Indirect measurements continue to provide inconsistent results, leaving the issue of charge symmetry in the nuclear force unresolved. At present the Russian pulsed reactor YAGUAR is the best neutron source for such a measurement. A neutron moderator is installed in the central through channel and the scattered neutrons are detected at a distance of 12 m from the reactor. An instantaneous value of 1.1 × 10(18)/cm²s was obtained for the thermal neutron flux density. The experiment will be performed by the DIANNA Collaboration as ISTC project No. 2286.

Published
2005

31. Current Status of the Experiment on Direct Measurement of Neutron-Neutron Scattering Length at the Reactor YAGUAR

Author

Furman, W. I., primary, Muzichka, A. Yu., additional, Crawford, B. E., additional, Howell, C. R., additional, Kandiev, Ya., additional, Levakov, B. G., additional, Litvin, V. I., additional, Lychagin, E. V., additional, Lyzhin, A. E., additional, Mitchell, G. E., additional, Nekhaev, G. V., additional, Sharapov, E. I., additional, Shvetsov, V. N., additional, Stephenson, S. L., additional, Strelkov, A. V., additional, Tchernukhin, Yu. I., additional, Tornow, W., additional, Dashdorj, Dugersuren, additional, Agvaanluvsan, Undraa, additional, and Mitchell, Gary E., additional

Published
2009
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33. Neutron Studies of Impurity Gels of Heavy Water and Deuterium in Superfluid He-II

Author

Mezhov-Deglin, L. P., primary, Efimov, V. B., additional, Lokhov, A. V., additional, Levchenko, A. A., additional, Kolmakov, G. V., additional, Abdurakhimov, L. V., additional, Brazhnikov, M. Y., additional, Lebedeva, E. V., additional, May, R., additional, Nesvizhevsky, V. V., additional, Muzychka, A. V., additional, Lychagin, E. V., additional, and Strelkov, A. V., additional

Published
2007
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34. UCN Source at an External Beam of Thermal Neutrons.

Author

Lychagin, E. V., Muzychka, A. Yu., Nekhaev, G. V., Nesvizhevsky, V. V., Sharapov, E. I., and Strelkov, A. V.

Subjects
*ULTRACOLD neutrons, *SUPERFLUIDITY, *LIQUID helium, *METHANE, *THERMAL analysis, *NEUTRON flux
Abstract

We propose a new method for production of ultracold neutrons (UCNs) in superfluid helium. The principal idea consists in installing a helium UCN source into an external beam of thermal or cold neutrons and in surrounding this source with a solid methane moderator/reflector cooled down to ~4 K. The moderator plays the role of an external source of cold neutrons needed to produce UCNs. The flux of accumulated neutrons could exceed the flux of incident neutrons due to their numerous reflections from methane; also the source size could be significantly larger than the incident beam diameter. We provide preliminary calculations of cooling of neutrons. These calculations show that such a source being installed at an intense source of thermal or cold neutrons like the ILL or PIK reactor or the ESS spallation source could provide the UCN density 105 cm−3, the production rate 107 UCN/s−1. Main advantages of such an UCN source include its low radiative and thermal load, relatively low cost, and convenient accessibility for any maintenance. We have carried out an experiment on cooling of thermal neutrons in a methane cavity. The data confirm the results of our calculations of the spectrum and flux of neutrons in the methane cavity. [ABSTRACT FROM AUTHOR]

Published
2015
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35. Direct measurement of the neutron neutron scattering cross section at the reactor YAGUAR

Author

Furman, W I, primary, Lychagin, E V, additional, Muzichka, A Yu, additional, Nekhaev, G V, additional, Safronov, Yu V, additional, Strelkov, A V, additional, Sharapov, E I, additional, Shvetsov, V N, additional, Levakov, B G, additional, Litvin, V I, additional, Lyzhin, A E, additional, Magda, E P, additional, Howell, C R, additional, Mitchell, G E, additional, Tornow, W, additional, Crawford, B E, additional, Stephenson, S L, additional, and Bowman, C D, additional

Published
2002
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36. AN INVESTIGATION INTO THE ORIGIN OF SMALL ENERGY CHANGES (~ 10-7eV) OF ULTRACOLD NEUTRONS IN TRAPS.

Author

KARTASHOV, D. G., LYCHAGIN, E. V., MUZYCHKA, A. Yu., NESVIZHEVSKY, V. V., NEKHAEV, G. V., and STRELKOV, A. V.

Subjects
*ULTRACOLD neutrons, *COLD neutrons, *NANOPARTICLES, *NANOSTRUCTURED materials, *PARTICLES, *NANOSCIENCE
Abstract

We studied the phenomenon of relatively small changes in the energy of ultracold neutrons (UCN) (when compared to thermal motion energy) when these are reflected on a surface. The changes observed involved both increases in UCN energy (their heating) and decreases (cooling) of the order of ~ 10-7 eV. The probability values of this process on various surfaces ranged between 10-8 and 10-5 per one collision; the probability of such a small heating was many times larger than that of such a small cooling. We measured the spectra of such heated neutrons and the dependence of small heating probability on the temperature of sample out-gazing. We found that out-gazing of samples in vacuum at a temperature of 500–600 K could increase the small heating probability on stainless steel surface by a factor of ~ 100; and on copper surface by a factor of ~ 10. We observed, for the first time, extremely intensive small heating of UCN on powder of diamond nanoparticles. Neither small heating of UCN, nor nanoparticles could be found on a sapphire single crystal surface. This set of experimental data indicates that the inelastic scattering of UCN on weakly bound nanoparticles at a surface in a state of thermal motion is responsible for the process investigated. [ABSTRACT FROM AUTHOR]

Published
2007
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37. Direct nn-Scattering Measurement With the Pulsed Reactor YAGUAR.

Author

Mitchell, G. E., Furman, W. I., Lychagin, E. V., Muzichka, A. Yu., Nekhaev, G. V., Strelkov, A. V., Sharapov, E. I., Shvetsov, V. N., Chernuhin, Yu. I., Levakov, B. G., Litvin, V. I., Lyzhin, A. E., Magda, E. P., Crawford, B. E., Stephenson, S. L., Howell, C. R., and Tornow, W.

Subjects
NEUTRONS, PULSED reactors, NUCLEAR reactors, THERMAL neutrons, NEUTRON flux
Abstract

Although crucial for resolving the issue of charge symmetry in the nuclear force, direct measurement of nn-scattering by colliding free neutrons has never been performed. At present the Russian pulsed reactor YAGUAR is the best neutron source for performing such a measurement. It has a through channel where the neutron moderator is installed. The neutrons are counted by a neutron detector located 12 m from the reactor. In preliminary experiments an instantaneous value of 1.1 x 1018 /cm²s was obtained for the thermal neutron flux density. The experiment will be performed by the DIANNA Collaboration as International Science & Technology Center (ISTC) project No. 2286. [ABSTRACT FROM AUTHOR]

Published
2005
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41. Particle Physics at the European Spallation Source

Author

Abele, H., Alekou, A., Algora, A., Andersen, K., Baeßler, S., Barron-Pálos, L., Barrow, J., Baussan, E., Bentley, P., Berezhiani, Z., Beßler, Y., Bhattacharyya, A. K., Bianchi, A., Bijnens, J., Blanco, C., Blaskovic Kraljevic, N., Blennow, M., Bodek, K., Bogomilov, M., Bohm, C., Bolling, B., Bouquerel, E., Brooijmans, G., Broussard, L. J., Buchan, O., Burgman, A., Calén, H., Carlile, C. J., Cederkall, J., Chanel, E., Christiansen, P., Cirigliano, V., Collar, J. I., Collins, M., Crawford, C. B., Cristaldo Morales, E., Cupiał, P., D Alessi, L., Damian, J. I. M., Danared, H., Dancila, D., André, J. P. A. M., Delahaye, J. P., Degenkolb, S., Di Julio, D. D., Dracos, M., Dunne, K., Efthymiopoulos, I., Ekelöf, T., Eklund, L., Eshraqi, M., Esteban, I., Fanourakis, G., Farricker, A., Fernandez-Martinez, E., Ferreira, M. J., Fertl, M., Fierlinger, P., Folsom, B., Frank, A., Fratangelo, A., Friman-Gayer, U., Fukuda, T., Fynbo, H. O. U., Sosa, A. Garcia, Gazis, N., Gålnander, B., Geralis, Th, Monojit Ghosh, Gokbulut, G., Gomez-Cadenas, J. J., Gonzalez-Alonso, M., Gonzalez, F., Halić, L., Happe, C., Heil, P., Heinz, A., Herde, H., Holl, M., Jenke, T., Jenssen, M., Jericha, E., Johansson, H. T., Johansson, R., Johansson, T., Kamyshkov, Y., Kayis Topaksu, A., Kildetoft, B., Kirch, K., Kliček, B., Klinkby, E., Kolevatov, R., Konrad, G., Kozioł, M., Krhač, K., Kupść, A., Łacny, Ł., Larizgoitia, L., Lewis, C. M., Lindroos, M., Lychagin, E., Lytken, E., Maiano, C., Marciniewski, P., Markaj, G., Märkisch, B., Marrelli, C., Martins, C., Meirose, B., Mezzetto, M., Milas, N., Milstead, D., Monrabal, F., Muhrer, G., Nepomuceno, A., Nesvizhevsky, V., Nilsson, T., Novella, P., Oglakci, M., Ohlsson, T., Olvegård, M., Oskarsson, A., Ota, T., Park, J., Patrzalek, D., Perrey, H., Persoz, M., Petkov, G., Piegsa, F. M., Pistillo, C., Poussot, P., Privitera, P., Rataj, B., Ries, D., Rizzi, N., Rosauro-Alcaraz, S., Rozpedzik, D., Saiang, D., Santoro, V., Schmidt, U., Schober, H., Schulthess, I., Silverstein, S., Simón, A., Sina, H., Snamina, J., Snow, W. M., Soldner, T., Stavropoulos, G., Stipčević, M., Szybiński, B., Takibayev, A., Tang, Z., Tarkeshian, R., Theroine, C., Thorne, J., Terranova, F., Thomas, J., Tolba, T., Torres-Sánchez, P., Trachanas, E., Tsenov, R., Uggerhøj, U. I., Vankova-Kirilova, G., Vassilopoulos, N., Wagner, R., Wang, X., Wildner, E., Wolke, M., Wurtz, J., Yiu, S. C., Yoon, S. G., Young, A. R., Zanini, L., Zejma, J., Zerzion, D., Zimmer, O., Zormpa, O., Zou, Y., and HEP, INSPIRE

Subjects
Physics - Instrumentation and Detectors, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], hep-ex, FOS: Physical sciences, hep-ph, Instrumentation and Detectors (physics.ins-det), nucl-ex, High Energy Physics - Experiment, High Energy Physics - Phenomenology, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), [PHYS.PHYS.PHYS-INS-DET] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], fission, Nuclear Physics - Experiment, Nuclear Experiment (nucl-ex), Detectors and Experimental Techniques, Nuclear Experiment, physics.ins-det, activity report, Particle Physics - Experiment, Particle Physics - Phenomenology
Abstract

Presently under construction in Lund, Sweden, the European Spallation Source (ESS) will be the world's brightest neutron source. As such, it has the potential for a particle physics program with a unique reach and which is complementary to that available at other facilities. This paper describes proposed particle physics activities for the ESS. These encompass the exploitation of both the neutrons and neutrinos produced at the ESS for high precision (sensitivity) measurements (searches)., Comment: 121 pages

42. Neutron physics at JINR: 60 years of the I M Frank Laboratory of Neutron Physics

Author

Lychagin, E V, Kozlenko, D P, Sedyshev, P V, and Shvetsov, V N

Abstract

26 March 2016 marked since the Joint Institute for Nuclear Research was founded in 1956 and within which the Laboratory of Neutron Physics was established. Already four years later, in 1960, the world's first pulsed fast reactor (known by its Russian acronym as IBR) operating in the periodic mode was put into operation, followed in 1984 by IBR-2. The research achievements over the last decade are summarized, the state-of-the-art laboratory hardware is discussed, and the prospects for the future are reviewed.

Published
2016
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43. Geometric Aspects of the Quantization of a Rigid Body

Author

Raffaele Vitolo, Marco Modugno, C. Tejero Prieto, B. Kruglikov, V. Lychagin, E. Straume, Modugno, M, TEJERO PRIETO, C, and Vitolo, Raffaele

Subjects
Geometric quantization, Physics, Classical mechanics, Line bundle, Quantization (signal processing), Complex line, Simply connected space, Magnetic monopole, Configuration space, Rigid body
Abstract

In this paper we review our results on the quantization of a rigid body. The fact that the configuration space is not simply connected yields two inequivalent quantizations. One of the quantizations allows us to recover classically double-valued wave functions as single valued sections of a non-trivial complex line bundle. This reopens the problem of a physical interpretation of these wave functions.

Published
2009
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44. Powders of Diamond Nanoparticles as a Promising Material for Reflectors of Very Cold and Cold Neutrons.

Author

Lychagin E, Dubois M, and Nesvizhevsky V

Abstract

More than 15 years ago, the study of nanodiamond (ND) powders as a material for designing reflectors of very cold neutrons (VCNs) and cold neutrons (CNs) began. Such reflectors can significantly increase the efficiency of using such neutrons and expand the scope of their application for solving applied and fundamental problems. This review considers the principle of operation of VCN and CN reflectors based on ND powders and their advantages. Information is presented on the performed experimental and theoretical studies of the effect of the size, structure, and composition of NDs on the efficiency of reflectors. Methods of chemical and mechanical treatments of powders in order to modify their chemical composition and structure are discussed. The aim is to avoid, or at least to decrease, the neutron inelastic scatterers and absorbers (mainly hydrogen atoms but also metallic impurities and nitrogen) as well as to enhance coherent elastic scattering (to destroy ND clusters and sp 2 carbon shells on the ND surface that result from the preparation of NDs). Issues requiring further study are identified. They include deeper purification of NDs from impurities that can be activated in high radiation fluxes, the stability of NDs in high radiation fluxes, and upscaling methods for producing larger quantities of ND powders. Possible ways of solving these problems are proposed.

Published
2024
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45. Effect of Nanodiamond Sizes on the Efficiency of the Quasi-Specular Reflection of Cold Neutrons.

Author

Bosak A, Dubois M, Korobkina E, Lychagin E, Muzychka A, Nekhaev G, Nesvizhevsky V, Nezvanov A, Saerbeck T, Schweins R, Strelkov A, Turlybekuly K, and Zhernenkov K

Abstract

Nanomaterials can intensively scatter and/or reflect radiation. Such processes and materials are of theoretical and practical interest. Here, we study the quasi-specular reflections (QSRs) of cold neutrons (CNs) and the reflections of very cold neutrons (VCNs) from nanodiamond (ND) powders. The fluorination of ND increased its efficiency by removing/replacing hydrogen, which is otherwise the dominant cause of neutron loss due to incoherent scattering. The probability of the diffuse reflection of VCNs increased for certain neutron wavelengths by using appropriate ND sizes. Based on model concepts of the interaction of CNs with ND, and in reference to our previous work, we assume that the angular distribution of quasi-specularly reflected CNs is narrower, and that the probability of QSRs of longer wavelength neutrons increases if we increase the characteristic sizes of NDs compared to standard detonation nanodiamonds (DNDs). However, the probability of QSRs of CNs with wavelengths below the cutoff of ~4.12 Å decreases due to diffraction scattering on the ND crystal lattice. We experimentally compared the QSRs of CNs from ~4.3 nm and ~15.0 nm ND. Our qualitative conclusions and numerical estimates can help optimize the parameters of ND for specific practical applications based on the QSRs of CNs.

Published
2023
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46. Clustering of Diamond Nanoparticles, Fluorination and Efficiency of Slow Neutron Reflectors.

Author

Aleksenskii A, Bleuel M, Bosak A, Chumakova A, Dideikin A, Dubois M, Korobkina E, Lychagin E, Muzychka A, Nekhaev G, Nesvizhevsky V, Nezvanov A, Schweins R, Shvidchenko A, Strelkov A, Turlybekuly K, Vul' A, and Zhernenkov K

Abstract

Neutrons can be an instrument or an object in many fields of research. Major efforts all over the world are devoted to improving the intensity of neutron sources and the efficiency of neutron delivery for experimental installations. In this context, neutron reflectors play a key role because they allow significant improvement of both economy and efficiency. For slow neutrons, Detonation NanoDiamond (DND) powders provide exceptionally good reflecting performance due to the combination of enhanced coherent scattering and low neutron absorption. The enhancement is at maximum when the nanoparticle diameter is close to the neutron wavelength. Therefore, the mean nanoparticle diameter and the diameter distribution are important. In addition, DNDs show clustering, which increases their effective diameters. Here, we report on how breaking agglomerates affects clustering of DNDs and the overall reflector performance. We characterize DNDs using small-angle neutron scattering, X-ray diffraction, scanning and transmission electron microscopy, neutron activation analysis, dynamical light scattering, infra-red light spectroscopy, and others. Based on the results of these tests, we discuss the calculated size distribution of DNDs, the absolute cross-section of neutron scattering, the neutron albedo, and the neutron intensity gain for neutron traps with DND walls.

Published
2021
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47. Fluorination of Diamond Nanoparticles in Slow Neutron Reflectors Does Not Destroy Their Crystalline Cores and Clustering While Decreasing Neutron Losses.

Author

Bosak A, Dideikin A, Dubois M, Ivankov O, Lychagin E, Muzychka A, Nekhaev G, Nesvizhevsky V, Nezvanov A, Schweins R, Strelkov A, Vul' A, and Zhernenkov K

Abstract

If the wavelength of radiation and the size of inhomogeneities in the medium are approximately equal, the radiation might be intensively scattered in the medium and reflected from its surface. Such efficient nanomaterial reflectors are of great scientific and technological interest. In previous works, we demonstrated a significant improvement in the efficiency of reflection of slow neutrons from a powder of diamond nanoparticles by replacing hydrogen located on the surface of nanoparticles with fluorine and removing the residual sp 2 amorphous shells of nanoparticles via the fluorination process. In this paper, we study the mechanism of this improvement using a set of complementary experimental techniques. To analyze the data on a small-angle scattering of neutrons and X-rays in powders of diamond nanoparticles, we have developed a model of discrete-size diamond nanospheres. Our results show that fluorination does not destroy either the crystalline cores of nanoparticles or their clustering in the scale range of 0.6-200 nm. This observation implies that it does not significantly affect the neutron scattering properties of the powder. We conclude that the overall increase in reflectivity from the fluorinated nanodiamond powder is primarily due to the large reduction of neutron losses in the powder caused by the removal of hydrogen contaminations.

Published
2020
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