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 meshes and cryogenic microwave absorbing material were used to lower the effective temperature of the radiation environment in ASACUSA's Cusp trap, resulting in significantly reduced plasma temperature.
Reducing the background temperature for cyclotron cooling in a cryogenic Penning-Malmberg trap / C. Amsler, H. Breuker, S. Chesnevskaya, G. Costantini, R. Ferragut, M. Giammarchi, A. Gligorova, G. Gosta, H. Higaki, E. Hunter, C. Killian, V. Kletzl, V. Kraxberger, N. Kuroda, A. Lanz, M. Leali, V. Maeckel, G. Maero, C. Malbrunot, V. Mascagna, Y. Matsuda, S. Migliorati, D. Murtagh, Y. Nagata, A. Nanda, L. Nowak, E. Pasino, M. Rome', M. Simon, M. Tajima, V. Toso, S. Ulmer, L. Venturelli, A. Weiser, E. Widmann, T. Wolz, Y. Yamazaki, J. Zmeskal. - In: PHYSICS OF PLASMAS. - ISSN 1070-664X. - 29:8(2022), pp. 083303.1-083303.13. [10.1063/5.0093360]
Reducing the background temperature for cyclotron cooling in a cryogenic Penning-Malmberg trap
M. Giammarchi;G. MaeroMembro del Collaboration Group
;E. PasinoMembro del Collaboration Group
;M. Rome'Membro del Collaboration Group
;
2022
Abstract
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 meshes and cryogenic microwave absorbing material were used to lower the effective temperature of the radiation environment in ASACUSA's Cusp trap, resulting in significantly reduced plasma temperature.
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