Zobrazeno 1 - 10
of 191
pro vyhledávání: '"Van der Werf D. P."'
Autor:
Adrich, P., Blumer, P., Caratsch, G., Chung, M., Cladé, P., Comini, P., Crivelli, P., Dalkarov, O., Debu, P., Douillet, A., Drapier, D., Froelich, P., Garroum, N., Guellati-Khelifa, S., Guyomard, J., Hervieux, P-A., Hilico, L., Indelicato, P., Jonsell, S., Karr, J-P., Kim, B., Kim, S., Kim, E-S., Ko, Y. J., Kosinski, T., Kuroda, N., Latacz, B. M., Lee, B., Lee, H., Lee, J., Lim, E., Liszkay, L., Lunney, D., Manfredi, G., Mansoulié, B., Matusiak, M., Nesvizhevsky, V., Nez, F., Niang, S., Ohayon, B., Park, K., Paul, N., Pérez, P., Regenfus, C., Reynaud, S., Roumegou, C., Roussé, J-Y., Sacquin, Y., Sadowski, G., Sarkisyan, J., Sato, M., Schmidt-Kaler, F., Staszczak, M., Szymczyk, K., Tanaka, T. A., Tuchming, B., Vallage, B., Voronin, A., van der Werf, D. P., Won, D., Wronka, S., Yamazaki, Y., Yoo, K-H., Yzombard, P.
Publikováno v:
European Physical Journal C 83, 1004 (2023)
We report on the first production of an antihydrogen beam by charge exchange of 6.1 keV antiprotons with a cloud of positronium in the GBAR experiment at CERN. The antiproton beam was delivered by the AD/ELENA facility. The positronium target was pro
Externí odkaz:
http://arxiv.org/abs/2306.15801
Autor:
Baker, C. J., Bertsche, W., Capra, A., Cesar, C. L., Charlton, M., Christensen, A. J., Collister, R., Mathad, A. Cridland, Eriksson, S., Evans, A., Evetts, N., Fabbri, S., Fajans, J., Friesen, T., Fujiwara, M. C., Gill, D. R., Grandemange, P., Granum, P., Hangst, J. S., Hayden, M. E., Hodgkinson, D., Isaac, C. A., Johnson, M. A., Jones, J. M., Jones, S. A., Khramov, A., Kurchaninov, L., Madsen, N., Maxwell, D., McKenna, J. T. K., Menary, S., Momose, T., Mullan, P. S., Munich, J. J., Olchanski, K., Peszka, J., Powell, A., Rasmussen, C. O., Sacramento, R. L., Sameed, M., Sarid, E., Silveira, D. M., So, C., Starko, D. M., Stutter, G., Tharp, T. D., Thompson, R. I., Torkzaban, C., van der Werf, D. P., Wurtele, J. S.
The ALPHA Collaboration, based at the CERN Antiproton Decelerator, has recently implemented a novel beamline for low-energy ($\lesssim$ 100 eV) positron and antiproton transport between cylindrical Penning traps that have strong axial magnetic fields
Externí odkaz:
http://arxiv.org/abs/2211.09838
Autor:
Blumer, P., Charlton, M., Chung, M., Clade, P., Comini, P., Crivelli, P., Dalkarov, O., Debu, P., Dodd, L., Douillet, A., Guellati, S., Hervieux, P. -A, Hilico, L., Indelicato, P., Janka, G., Jonsell, S., Karr, J. -P., Kim, B. H., Kim, E. S., Kim, S. K., Ko, Y., Kosinski, T., Kuroda, N., Latacz, B. M., Lee, B., Lee, H., Lee, J., Leitee, A. M. M., Leveque, K., Lim, E., Liszkay, L., Lotrus, P., Lunney, D., Manfredi, G., Mansoulie, B., Matusiak, M., Mornacchi, G., Nesvizhevsky, V., Nez, F., Niang, S., Nishi, R., Ohayon, B., Park, K., Paul, N., Perez, P., Procureur, S., Radics, B., Regenfus, C., Reymond, J. -M., Reynaud, S., Rousse, J. -Y., Rousselle, O., Rubbia, A., Rzadkiewicl, J., Sacquin, Y., Schmidt-Kaler, F., Staszczak, M., Szymczyk, K., Tanaka, T., Tuchming, B., Vallage, B., Voronin, A., van der Werf, D. P., Wolf, S., Won, D., Wronka, S., Yamazaki, Y., Yoo, K. H., Yzombard, P., Baker, C. J.
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A, Volume 1040, 2022, 167263
We present a description of the GBAR positron (e+) trapping apparatus, which consists of a three stage Buffer Gas Trap (BGT) followed by a High Field Penning Trap (HFT), and discuss its performance. The overall goal of the GBAR experiment is to measu
Externí odkaz:
http://arxiv.org/abs/2205.04530
Autor:
Capra, A., Amole, C., Ashkezari, M. D., Baquero-Ruiz, M., Bertsche, W., Butler, E., Cesar, C. L., Charlton, M., Eriksson, S., Fajans, J., Friesen, T., Fujiwara, M. C., Gill, D. R., Gutierrez, A., Hangst, J. S., Hardy, W. N., Hayden, M. E., Isaac, C. A., Jonsell, S., Kurchaninov, L ., Little, A., McKenna, J. T. K., Menary, S., Napoli, S. C., Nolan, P., Olchanski, K., Olin, A., Povilus, A., Pusa, P., Robicheaux, F., Sarid, E., Silveira, D. M., So, C., Tharp, T. D., Thompson, R. I., van der Werf, D. P., Vendeiro, Z., Wurtele, J. S., Zhmoginov, A. I., Charman, A. E.
Publikováno v:
Hyperfine Interact 238, 9 (2017)
The ALPHA collaboration has successfully demonstrated the production and the confinement of cold antihydrogen, $\overline{\mathrm{H}}$. An analysis of trapping data allowed a stringent limit to be placed on the electric charge of the simplest antiato
Externí odkaz:
http://arxiv.org/abs/2107.08152
Autor:
Charlton, M., Choi, J. J., Chung, M., Clade, P., Comini, P., Crepin, P-P., Crivelli, P., Dalkarov, O., Debu, P., Dodd, L., Douillet, A., Guellati-Khelifa, S., Hervieux, P-A., Hilico, L., Husson, A., Indelicato, P., Janka, G., Jonsell, S., Karr, J-P., Kim, B. H., Kim, E-S., Kim, S. K., Ko, Y., Kosinski, T., Kuroda, N., Latacz, B., Lee, H., Lee, J., Leite, A. M. M., Leveque, K., Lim, E., Liszkay, L., Lotrus, P., Louvradoux, T., Lunney, D., Manfredi, G., Mansoulie, B., Matusiak, M., Mornacchi, G., Nesvizhevsky, V. V., Nez, F., Niang, S., Nishi, R., Nourbaksh, S., Park, K. H., Paul, N., Perez, P., Procureur, S., Radics, B., Regenfus, C., Rey, J-M., Reymond, J-M., Reynaud, S., Rousse, J-Y., Rousselle, O., Rubbia, A., Rzadkiewicz, J., Sacquin, Y., Schmidt-Kaler, F., Staszczak, M., Tuchming, B., Vallage, B., Voronin, A., Welker, A., van der Werf, D. P., Wolf, S., Won, D., Wronka, S., Yamazaki, Y., Yoo, K-H.
Publikováno v:
Nucl. Instrum. Methods Phys. Res. A 985, 164657 (2021)
For the GBAR (Gravitational Behaviour of Antihydrogen at Rest) experiment at CERN's Antiproton Decelerator (AD) facility we have constructed a source of slow positrons, which uses a low-energy electron linear accelerator (linac). The driver linac pro
Externí odkaz:
http://arxiv.org/abs/2006.05966
Autor:
Amole, C., Ashkezari, M. D., Baquero-Ruiz, M., Bertsche, W., Butler, E., Capra, A., Cesar, C. L., Charlton, M., Deller, A., Evetts, N., Eriksson, S., Fajans, J., Friesen, T., Fujiwara, M. C., Gill, D. R., Gutierrez, A., Hangst, J. S., Hardy, W. N., Hayden, M. E., Isaac, C. A., Jonsell, S., Kurchaninov, L., Little, A., Madsen, N., McKenna, J. T. K., Menary, S., Napoli, S. C., Olchanski, K., Olin, A., Pusa, P., Rasmussen, C. Ø., Robicheaux, F., Sarid, E., Silveira, D. M., So, C., Stracka, S., Tharp, T., Thompson, R. I., van der Werf, D. P., Wurtele, J. S.
Publikováno v:
New J. Phys. 16 013037 (2014)
We demonstrate a novel detection method for the cyclotron resonance frequency of an electron plasma in a Penning-Malmberg trap. With this technique, the electron plasma is used as an in situ diagnostic tool for measurement of the static magnetic fiel
Externí odkaz:
http://arxiv.org/abs/1405.0692
Autor:
Amole, C., Andresen, G. B., Ashkezari, M. D., Baquero-Ruiz, M., Bertsche, W., Butler, E., Cesar, C. L., Chapman, S., Charlton, M., Deller, A., Eriksson, S., Fajans, J., Friesen, T., Fujiwara, M. C., Gill, D. R., Gutierrez, A., Hangst, J. S., Hardy, W. N., Hayden, M. E., Humphries, A. J., Hydomako, R., Kurchaninov, L., Jonsell, S., Madsen, N., Menary, S., Nolan, P., Olchanski, K., Olin, A., Povilus, A., Pusa, P., Robicheaux, F., Sarid, E., Silveira, D. M., So, C., Storey, J. W., Thompson, R. I., van der Werf, D. P., Wurtele, J. S.
Publikováno v:
New J. Phys., 14 015010, 2012
Recently, antihydrogen atoms were trapped at CERN in a magnetic minimum (minimum-B) trap formed by superconducting octupole and mirror magnet coils. The trapped antiatoms were detected by rapidly turning off these magnets, thereby eliminating the mag
Externí odkaz:
http://arxiv.org/abs/1201.3944
Autor:
ALPHA Collaboration, Andresen, G. B., Ashkezari, M. D., Baquero-Ruiz, M., Bertsche, W., Butler, E., Cesar, C. L., Deller, A., Eriksson, S., Fajans, J., Friesen, T., Fujiwara, M. C., Gill, D. R., Gutierrez, A., Hangst, J. S., Hardy, W. N., Hayano, R. S., Hayden, M. E., Humphries, A. J., Hydomako, R., Jonsell, S., Kemp, S., Kurchaninov, L., Madsen, N., Menary, S., Nolan, P., Olchanski, K., Olin, A., Pusa, P., Rasmussen, C. Ø., Robicheaux, F., Sarid, E., Silveira, D. M., So, C., Storey, J. W., Thompson, R. I., van der Werf, D. P., Wurtele, J. S., Yamazaki, Y.
Publikováno v:
Nature Phys.7:558-564,2011
Atoms made of a particle and an antiparticle are unstable, usually surviving less than a microsecond. Antihydrogen, made entirely of antiparticles, is believed to be stable, and it is this longevity that holds the promise of precision studies of matt
Externí odkaz:
http://arxiv.org/abs/1104.4982
Autor:
Andresen, G. B., Ashkezari, M. D., Baquero-Ruiz, M., Bertsche, W., Bowe, P. D., Butler, E., Cesar, C. L., Chapman, S., Charlton, M., Deller, A., Eriksson, S., Fajans, J., Friesen, T., Fujiwara, M. C., Gill, D. R., Gutierrez, A., Hangst, J. S., Hardy, W. N., Hayden, M. E., Humphries, A. J., Hydomako, R., Jonsell, S., Madsen, N., Menary, S., Nolan, P., Olin, A., Povilus, A., Pusa, P., Robicheaux, F., Sarid, E., Silveira, D. M., So, C., Storey, J. W., Thompson, R. I., van der Werf, D. P., Wurtele, J. S., Yamazaki, Y.
Publikováno v:
Phys. Rev. Lett., 106 145001, (2011)
Charges in cold, multiple-species, non-neutral plasmas separate radially by mass, forming centrifugally-separated states. Here, we report the first detailed measurements of such states in an electron-antiproton plasma, and the first observations of t
Externí odkaz:
http://arxiv.org/abs/1104.4841
Autor:
ALPHA Collaboration, Fujiwara, M. C., Andresen, G. B., Ashkezari, M. D., Baquero-Ruiz, M., Bertsche, W., Bray, C. C., Butler, E., Cesar, C. L., Chapman, S., Charlton, M., Fajans, J., Friesen, T., Gill, D. R., Hangst, J. S., Hardy, W. N., Hayano, R. S., Hayden, M. E., Humphries, A. J., Hydomako, R., Jonsell, S., Kurchaninov, L., Lambo, R., Madsen, N., Menary, S., Nolan, P., Olchanski, K., Olin, A., Povilus, A., Pusa, P., Robicheaux, F., Sarid, E., Silveira, D. M., So, C., Storey, J. W., Thompson, R. I., van der Werf, D. P., Wilding, D., Wurtele, J. S., Yamazaki, Y.
Publikováno v:
Proceedings of the Fifth Meeting on CPT and Lorentz Symmetry, Ed. V.A. Kostelecky, pp. 50-54, World Scientific (2011)
ALPHA is an experiment at CERN, whose ultimate goal is to perform a precise test of CPT symmetry with trapped antihydrogen atoms. After reviewing the motivations, we discuss our recent progress toward the initial goal of stable trapping of antihydrog
Externí odkaz:
http://arxiv.org/abs/1104.4661