Proton beam defocusing in AWAKE: comparison of simulations and measurements

In 2017, AWAKE demonstrated the seeded self-modulation (SSM) of a 400 GeV proton beam from the Super Proton Synchrotron (SPS) at CERN. The angular distribution of the protons deflected due to SSM is a quantitative measure of the process, which agrees with simulations by the two-dimensional (axisymme...

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Detalles Bibliográficos
Autores principales: Gorn, A.A., Turner, M., Adli, E., Agnello, R., Aladi, M., Andrebe, Y., Apsimon, O., Apsimon, R., Bachmann, A.-M, Baistrukov, M.A., Batsch, F., Bergamaschi, M., Blanchard, P., Burrows, P.N., Buttenschön, B., Caldwell, A., Chappell, J., Chevallay, E., Chung, M., Cooke, D.A., Damerau, H., Davut, C., Demeter, G., Deubner, L.H., Dexter, A., Djotyan, G.P., Doebert, S., Farmer, J., Fasoli, A., Fedosseev, V.N., Fiorito, R., Fonseca, R.A., Friebel, F., Furno, I., Garolfi, L., Gessner, S., Goddard, B., Gorgisyan, I., Granados, E., Granetzny, M., Grulke, O., Gschwendtner, E., Hafych, V., Hartin, A., Henderson, J.R., Howling, A., Hüther, M., Jacquier, R., Kargapolov, I. Yu, Kedves, M. Á, Keeble, F., Kelisani, M.D., Kim, S.-Y, Kraus, F., Krupa, M., Lefevre, T., Liang, L., Liu, S., Lotov, K.V., Martyanov, M., Mazzoni, S., Medina Godoy, D., Minakov, V.A., Moody, J.T., Morales Guzmán, P.I., Moreira, M., Nechaeva, T., Panuganti, H., Pardons, A., Peña Asmus, F., Perera, A., Petrenko, A., Pucek, J., Ráczkevi, B., Ramjiawan, R.L., Rey, S., Ruhl, H., Saberi, H., Schmitz, O., Senes, E., Sherwood, P., Spitsyn, R.I., Tuev, P.V., Velotti, F., Verra, L., Verzilov, V.A., Welsch, C.P., Williamson, B., Wing, M., Wolfenden, J., Woolley, B., Xia, G., Zepp, M., G. Zevi Della Porta
Lenguaje:eng
Publicado: 2020
Materias:
physics.plasm-ph
Other Fields of Physics
physics.acc-ph
Accelerators and Storage Rings
Acceso en línea:http://cds.cern.ch/record/2729756
Descripción
Sumario:In 2017, AWAKE demonstrated the seeded self-modulation (SSM) of a 400 GeV proton beam from the Super Proton Synchrotron (SPS) at CERN. The angular distribution of the protons deflected due to SSM is a quantitative measure of the process, which agrees with simulations by the two-dimensional (axisymmetric) particle-in-cell code LCODE. Agreement is achieved for beam populations between $10^{11}$ and $3 \times 10^{11}$ particles, various plasma density gradients ($-20 \div 20\%$) and two plasma densities ($2\times 10^{14} \text{cm}^{-3}$ and $7 \times 10^{14} \text{cm}^{-3}$). The agreement is reached only in the case of a wide enough simulation box (at least five plasma wavelengths).

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