Zobrazeno 1 - 10
of 1 284
pro vyhledávání: '"Hunter, P. D."'
Autor:
Amsler, C., Breuker, H., Bumbar, M., Chesnevskaya, S., Costantini, G., Ferragut, R., Giammarchi, M., Gligorova, A., Gosta, G., Higaki, H., Hori, M., Hunter, E. D., Killian, C., Kraxberger, V., Kuroda, N., Lanz, A., Leali, M., Maero, G., Malbrunot, C., Mascagna, V., Matsuda, Y., Maeckel, V., Migliorati, S., Murtagh, D. J., Nagata, Y., Nanda, A., Nowak, L., Rome, M., Simon, M. C., Tajima, M., Toso, V., Ulmer, S., Venturelli, L., Weiser, A., Widmann, E., Yamazaki, Y.
The Antiproton Decelerator (AD) at CERN provides antiproton bunches with a kinetic energy of 5.3 MeV. The Extra-Low ENergy Antiproton ring at CERN, commissioned at the AD in 2018, now supplies a bunch of electron-cooled antiprotons at a fixed energy
Externí odkaz:
http://arxiv.org/abs/2403.09268
Autor:
Fisher, Zachary F., Kim, Younghoon, Pipiras, Vladas, Crawford, Christopher, Petrie, Daniel J., Hunter, Michael D., Geier, Charles F.
How best to model structurally heterogeneous processes is a foundational question in the social, health and behavioral sciences. Recently, Fisher et al., (2022) introduced the multi-VAR approach for simultaneously estimating multiple-subject multivar
Externí odkaz:
http://arxiv.org/abs/2311.08658
Autor:
Lanz, A., Amsler, C., Breuker, H., Bumbar, M., Chesnevskaya, S., Costantini, G., Ferragut, R., Giammarchi, M., Gligorova, A., Gosta, G., Higaki, H., Hunter, E. D., Killian, C., Kraxberger, V., Kuroda, N., Leali, M., Maero, G., Malbrunot, C., Mascagna, V., Matsuda, Y., Mäckel, V., Migliorati, S., Murtagh, D. J., Nanda, A., Nowak, L., Gustafsson, F. Parnefjord, Rheinfrank, S., Romé, M., Simon, M. C., Tajima, M., Toso, V., Uggerhøj, U., Ulmer, S., Venturelli, L., Weiser, A., Widmann, E., Yamazaki, Y., Zmeskal, J.
The ASACUSA-Cusp collaboration has recently upgraded the positron system to improve the production of antihydrogen. Previously, the experiment suffered from contamination of the vacuum in the antihydrogen production trap due to the transfer of positr
Externí odkaz:
http://arxiv.org/abs/2307.06133
Autor:
Murtagh, D. J., Amsler, C., Breuker, H., Bumbar, M., Chesnevskaya, S., Costantini, G., Ferragut, R., Giammarchi, M., Gligorova, A., Gosta, G., Higaki, H., Hunter, E. D., Killian, C., Kraxberger, V., Kuroda, N., Lanz, A., Leali, M., Maero, G., Mal\-bru\-not, C., Mascagna, V., Matsuda, Y., Mäckel, V., Migliorati, S., Nanda, A., Nowak, L., Gustafsson, F. Parnefjord, Rheinfrank, S., Romé, M., Simon, M. C., Tajima, M., Toso, V., Ulmer, S., Venturelli, L., Weiser, A., Widmann, E., Wolz, T., Yamazaki, Y., Zmeskal, J.
The ASACUSA Cusp experiment requires the production of dense positron plasmas with a high repetition rate to produce a beam of antihydrogen. In this work, details of the positron production apparatus used for the first observation of the antihydrogen
Externí odkaz:
http://arxiv.org/abs/2306.12707
Publikováno v:
Rev. Sci. Instrum. 94, 103301 (2023)
A low energy proton source for non-neutral plasma experiments was developed. Electrons from a hot filament ionize H$_2$ gas inside a geometrically compensated Penning trap to produce protons via dissociative ionization. A rotating wall electric field
Externí odkaz:
http://arxiv.org/abs/2306.09003
Autor:
Hunter, E. D., Amsler, C., Breuker, H., Bumbar, M., Chesnevskaya, S., Costantini, G., Ferragut, R., Giammarchi, M., Gligorova, A., Gosta, G., Higaki, H., Killian, C., Kraxberger, V., Kuroda, N., Lanz, A., Leali, M., Maero, G., Malbrunot, C., Mascagna, V., Matsuda, Y., Mäckel, V., Migliorati, S., Murtagh, D. J., Nanda, A., Nowak, L., Gustafsson, F. Parnefjord, Rheinfrank, S., Romé, M., Simon, M. C., Tajima, M., Toso, V., Ulmer, S., Venturelli, L., Weiser, A., Widmann, E., Yamazaki, Y., Zmeskal, J.
Methods for reducing the radius, temperature, and space charge of nonneutral plasma are usually reported for conditions which approximate an ideal Penning Malmberg trap. Here we show that (1) similar methods are still effective under surprisingly adv
Externí odkaz:
http://arxiv.org/abs/2306.00862
The detection of photons with energies greater than a few tenths of an MeV, interacting via Compton scattering and/or pair production, faces a number of difficulties. The reconstruction of single-scatter Compton events can only determine the directio
Externí odkaz:
http://arxiv.org/abs/2206.08676
Autor:
Kraxberger, V., Amsler, C., Breuker, H., Chesnevskaya, S., Costantini, G., Ferragut, R., Giammarchi, M., Gligorova, A., Gosta, G., Higaki, H., Hunter, E. D., Killian, C., Kletzl, V., Kuroda, N., Lanz, A., Leali, M., Mäckel, V., Maero, G., Malbrunot, C., Mascagna, V., Matsuda, Y., Migliorati, S., Murtagh, D. J., Nagata, Y., Nanda, A., Nowak, L., Pasino, E., Romé, M., Simon, M. C., Tajima, M., Toso, V., Ulmer, S., Venturelli, L., Weiser, A., Widmann, E., Wolz, T., Yamazaki, Y., Zmeskal, J.
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A, Volume 1045, 2023
The goal of the ASACUSA (Atomic Spectroscopy And Collisions Using Slow Antiprotons) CUSP experiment at CERN's Antiproton Decelerator is to measure the ground state hyperfine splitting of antihydrogen in order to test whether CPT invariance is broken.
Externí odkaz:
http://arxiv.org/abs/2204.11572
Autor:
Amsler, C., Breuker, H., Chesnevskaya, S., Costantini, G., Ferragut, R., Giammarchi, M., Gligorova, A., Gosta, G., Higaki, H., Hunter, E. D., Killian, C., Kletzl, V., Kraxberger, V., Kuroda, N., Lanz, A., Leali, M., Mäckel, V., Maero, G., Malbrunot, C., Mascagna, V., Matsuda, Y., Migliorati, S., Murtagh, D. J., Nagata, Y., Nanda, A., Nowak, L., Pasino, E., Romé, M., Simon, M. C., Tajima, M., Toso, V., Ulmer, S., Venturelli, L., Weiser, A., Widmann, E., Wolz, T., Yamazaki, Y., Zmeskal, J.
Magnetized nonneutral plasma composed of electrons or positrons couples to the local microwave environment via cyclotron radiation. The equilibrium plasma temperature depends on the microwave energy density near the cyclotron frequency. Fine copper m
Externí odkaz:
http://arxiv.org/abs/2203.14890
Autor:
Hunter, E. D., Amsler, C., Breuker, H., Chesnevskaya, S., Costantini, G., Ferragut, R., Giammarchi, M., Gligorova, A., Gosta, G., Higaki, H., Kanai, Y., Killian, C., Kletzl, V., Kraxberger, V., Kuroda, N., Lanz, A., Leali, M., Mäckel, V., Maero, G., Malbrunot, C., Mascagna, V., Matsuda, Y., Migliorati, S., Murtagh, D. J., Nagata, Y., Nanda, A., Nowak, L., Pasino, E., Romé, M., Simon, M. C., Tajima, M., Toso, V., Ulmer, S., Uggerhøj, U., Venturelli, L., Weiser, A., Widmann, E., Wolz, T., Yamazaki, Y., Zmeskal, J.
The ASACUSA collaboration produces a beam of antihydrogen atoms by mixing pure positron and antiproton plasmas in a strong magnetic field with a double cusp geometry. The positrons cool via cyclotron radiation inside the cryogenic trap. Low positron
Externí odkaz:
http://arxiv.org/abs/2201.01256