Zobrazeno 1 - 10
of 55
pro vyhledávání: '"Hunter, E. 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:
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
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
The temperature of a nonneutral plasma confined in a Penning-Malmberg trap can be determined by slowly lowering one side of the trap's electrostatic axial confinement barrier; the temperature is inferred from the rate at which particles escape the tr
Externí odkaz:
http://arxiv.org/abs/2002.11216
The local magnetic field in a Penning-Malmberg trap is found by measuring the temperatures that result when electron plasmas are illuminated by microwaves pulses. Multiple heating resonances are observed as the pulse frequencies are swept. The many r
Externí odkaz:
http://arxiv.org/abs/1912.04358