Sympathetic cooling of positrons to cryogenic temperatures for antihydrogen production

Autor: C. J. Baker, W. Bertsche, A. Capra, C. L. Cesar, M. Charlton, A. Cridland Mathad, S. Eriksson, A. Evans, N. Evetts, S. Fabbri, J. Fajans, T. Friesen, M. C. Fujiwara, P. Grandemange, P. Granum, J. S. Hangst, M. E. Hayden, D. Hodgkinson, C. A. Isaac, M. A. Johnson, J. M. Jones, S. A. Jones, S. Jonsell, L. Kurchaninov, N. Madsen, D. Maxwell, J. T. K. McKenna, S. Menary, T. Momose, P. Mullan, K. Olchanski, A. Olin, J. Peszka, A. Powell, P. Pusa, C. Ø. Rasmussen, F. Robicheaux, R. L. Sacramento, M. Sameed, E. Sarid, D. M. Silveira, G. Stutter, C. So, T. D. Tharp, R. I. Thompson, D. P. van der Werf, J. S. Wurtele

Publikováno v: Nature Communications, Vol 12, Iss 1, Pp 1-8 (2021)

Positrons are key to the production of cold antihydrogen. Here the authors report the sympathetic cooling of positrons by interacting them with laser-cooled Be+ ions resulting in a three-fold reduction of the temperature of positrons for antihydrogen

Externí odkaz: https://doaj.org/article/6ecc6c4dbf8845aa90772d31cc0d11c7

Sympathetic cooling of positrons to cryogenic temperatures for antihydrogen production

Autor: T. D. Tharp, A. Evans, D. M. Silveira, N. Evetts, P. S. Mullan, Joel Fajans, G. Stutter, D. Hodgkinson, K. Olchanski, Jonathan Wurtele, Niels Madsen, M. C. Fujiwara, A. Powell, Francis Robicheaux, J. Peszka, P. Grandemange, M. Sameed, A. Capra, C. L. Cesar, T. Friesen, J. M. Jones, A. Olin, D. P. van der Werf, C. A. Isaac, J. T. K. McKenna, P. Granum, M. A. Johnson, J. S. Hangst, Leonid Kurchaninov, M. Charlton, S. Fabbri, R. L. Sacramento, Takamasa Momose, C. Ø. Rasmussen, C. J. Baker, Robert Thompson, S. Menary, Petteri Pusa, Chukman So, Svante Jonsell, Michael E. Hayden, W. Bertsche, A. Cridland Mathad, S. A. Jones, D. Maxwell, E. Sarid, Stefan Eriksson

Publikováno v: NATURE COMMUNICATIONS
ALPHA Collaboration 2021, ' Sympathetic cooling of positrons to cryogenic temperatures for antihydrogen production ', Nature Communications, vol. 12, no. 1, 6139 . https://doi.org/10.1038/s41467-021-26086-1
Baker, C J, Bertsche, W, Capra, A, Cesar, C L, Charlton, M, Mathad, A C, Eriksson, S, Evans, A, Evetts, N, Fabbri, S, Fajans, J, Friesen, T, Fujiwara, M C, Grandemange, P, Granum, P, Hangst, J S, Hayden, M E, Hodgkinson, D, Isaac, C A, Johnson, M A, Jones, J M, Jones, S A, Jonsell, S, Kurchaninov, L, Madsen, N, Maxwell, D, McKenna, J T K, Menary, S, Momose, T, Mullan, P, Olchanski, K, Olin, A, Peszka, J, Powell, A, Pusa, P, Rasmussen, C, Robicheaux, F, Sacramento, R L, Sameed, M, Sarid, E, Silveira, D M, Stutter, G, So, C, Tharp, T D, Thompson, R I, van der Werf, D P & Wurtele, J S 2021, ' Sympathetic cooling of positrons to cryogenic temperatures for antihydrogen production ', Nature Communications, vol. 12, 6139 . https://doi.org/10.1038/s41467-021-26086-1
Nature communications, vol 12, iss 1
Nature Communications, Vol 12, Iss 1, Pp 1-8 (2021)
Nature Communications

The positron, the antiparticle of the electron, predicted by Dirac in 1931 and discovered by Anderson in 1933, plays a key role in many scientific and everyday endeavours. Notably, the positron is a constituent of antihydrogen, the only long-lived ne

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::33fd4887c81927e3f7b99237c350e8fa

Laser cooling of antihydrogen atoms

Autor: C. L. Cesar, J. Peszka, D. Maxwell, E. Sarid, Stefan Eriksson, A. Olin, K. Olchanski, William Bertsche, G. Stutter, Leonid Kurchaninov, M. Charlton, M. C. Fujiwara, M. Sameed, Eric Hunter, A. Evans, A. Capra, J. J. Munich, J. T. K. McKenna, D. Hodgkinson, P. S. Mullan, P. Granum, A. Thibeault, J. M. Jones, J. S. Hangst, J. M. Michan, Michael E. Hayden, S. Menary, A. Cridland Mathad, D. P. van der Werf, S. A. Jones, N. Evetts, Chukman So, Niels Madsen, D. R. Gill, D. M. Silveira, A. Khramov, A. Christensen, Jonathan Wurtele, Walter Hardy, P. Knapp, C. Carruth, Joel Fajans, A. Powell, T. D. Tharp, T. Friesen, C. Ø. Rasmussen, C. A. Isaac, Francis Robicheaux, Takamasa Momose, R. L. Sacramento, M. A. Johnson, R. Collister, Robert Thompson, P. Grandemange, Svante Jonsell, D. M. Starko, Petteri Pusa, C. J. Baker

Publikováno v: Baker, C J, Bertsche, W, Capra, A, Carruth, C, Cesar, C L, Charlton, M, Christensen, A, Collister, R, Mathad, A C, Eriksson, S, Evans, A, Evetts, N, Fajans, J, Friesen, T, Fujiwara, M C, Gill, D R, Grandemange, P, Granum, P, Hangst, J S, Hardy, W N, Hayden, M E, Hodgkinson, D, Hunter, E, Isaac, C A, Johnson, M A, Jones, J M, Jones, S A, Jonsell, S, Khramov, A, Knapp, P, Kurchaninov, L, Madsen, N, Maxwell, D, McKenna, J T K, Menary, S, Michan, J M, Momose, T, Mullan, P S, Munich, J J, Olchanski, K, Olin, A, Peszka, J, Powell, A, Pusa, P, Rasmussen, C, Robicheaux, F, Sacramento, R L, Sameed, M, Sarid, E, Silveira, D M, Starko, D M, So, C, Stutter, G, Tharp, T D, Thibeault, A, Thompson, R I, van der Werf, D P & Wurtele, J S 2021, ' Laser cooling of antihydrogen atoms ', Nature, vol. 592, no. 7852, pp. 35-42 . https://doi.org/10.1038/s41586-021-03289-6
NATURE
Nature
ALPHA Collaboration 2021, ' Laser cooling of antihydrogen atoms ', Nature: international weekly journal of science, vol. 592, no. 7852, pp. 35-42 . https://doi.org/10.1038/s41586-021-03289-6
Nature, vol 592, iss 7852

The photon—the quantum excitation of the electromagnetic field—is massless but carries momentum. A photon can therefore exert a force on an object upon collision1. Slowing the translational motion of atoms and ions by application of such a force2

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::14546feda12fa3318c43875b6ae76824
https://pure.au.dk/portal/da/publications/laser-cooling-of-antihydrogen-atoms(e9a0c501-4c41-4aa1-a297-fd90d8150d1a).html

New Statistics, Old Schools: An Overview of Current Introductory Undergraduate and Graduate Statistics Pedagogy Practices

Autor: J Peszka, Lindsay A. Kennedy, Marc A. Sestir, Joanna G. Bartley

Publikováno v: Teaching of Psychology. :009862832110306

Background A philosophical shift in statistics regarding emphasis on “New Statistics” (NS; Cumming, G. (2014). The new statistics: Why and how. Psychological Science, 25(1), 7-29.) over conventional null hypothesis significance testing (NHST) rai

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::13ed7b18258385466e6c3510bf522148
https://doi.org/10.1177/00986283211030616

0180 Sleep, Sleepiness, and Sleep Hygiene Related to Nomophobia (No Mobile Phone Phobia)

Autor: J Peszka, B Moore, M Henderson, S Michelle, David F. Mastin, M Quattom, J Critton, B T Collins, M Sanders, N Abu-Halimeh

Publikováno v: Sleep. 43:A71-A71

Introduction Previously, active phone use at bedtime has been implicated in disrupted sleep and related complaints. To improve sleep, a recommendation following such findings is limiting phone use before and during bedtime. However, for those with th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b19b41be9256fa5c7079e2315dfa156c
https://doi.org/10.1093/sleep/zsaa056.178