Zobrazeno 1 - 10
of 656
pro vyhledávání: '"Wichmann G"'
Autor:
Antognini, A., Ayres, N. J., Belosevic, I., Bondar, V., Eggenberger, A., Hildebrandt, M., Iwai, R., Kaplan, D. M., Khaw, K. S., Kirch, K., Knecht, A., Papa, A., Petitjean, C., Phillips, T. J., Piegsa, F. M., Ritjoho, N., Stoykov, A., Taqqu, D., Wichmann, G.
Publikováno v:
Phys. Rev. Lett. 125, 164802 (2020)
We demonstrate efficient transverse compression of a 12.5 MeV/c muon beam stopped in a helium gas target featuring a vertical density gradient and crossed electric and magnetic fields. The muon stop distribution extending vertically over 14 mm was re
Externí odkaz:
http://arxiv.org/abs/2003.11986
Autor:
Belosevic, I., Antognini, A., Bao, Y., Eggenberger, A., Hildebrandt, M., Iwai, R., Kaplan, D. M., Khaw, K. S., Kirch, K., Knecht, A., Papa, A., Petitjean, C., Phillips, T. J., Piegsa, F. M., Ritjoho, N., Stoykov, A., Taqqu, D., Wichmann, G.
Publikováno v:
Hyperfine Interact (2019) 240: 41
Experiments with muons ($\mu^{+}$) and muonium atoms ($\mu^{+}e^{-}$) offer several promising possibilities for testing fundamental symmetries. Examples of such experiments include search for muon electric dipole moment, measurement of muon $g-2$ and
Externí odkaz:
http://arxiv.org/abs/1901.04886
Autor:
Antognini, A., Bao, Y., Belosevic, I., Eggenberger, A., Hildebrandt, M., Iwai, R., Kaplan, D. M., Khaw, K. S., Kirch, K., Knecht, A., Papa, A., Petitjean, C., Phillips, T. J., Piegsa, F. M., Ritjoho, N., Stoykov, A., Taqqu, D., Wichmann, G.
Publikováno v:
Eur. Phys. J. C (2019) 79: 430
A novel device to compress the phase space of a muon beam by a factor of $10^{10}$ with a $10^{-3}$ efficiency is under development. A surface muon beam is stopped in a helium gas target consisting of several compression stages, wherein strong electr
Externí odkaz:
http://arxiv.org/abs/1811.08332
We report the observation of positronium excitation from the 2S to the 20P state. The Rydberg positronium atoms fly a distance of 40 mm before being field ionized and detected in a micro-channel plate. The time of flight can thus be measured and the
Externí odkaz:
http://arxiv.org/abs/1809.07854
We present the current status for the direct measurement of the positronium hyperfine structure using the $\text{2}^\text{3}\text{S}_\text{1} \rightarrow \text{2}^\text{1}\text{S}_\text{0}$ transition. This experiment, currently being commissioned at
Externí odkaz:
http://arxiv.org/abs/1805.05886
Autor:
Crivelli, P., Wichmann, G.
We present the status and the prospects of the ongoing efforts to improve the measurements of the 1S-2S transition in positronium and muonium. These purely leptonic systems represent ideal objects to test bound-state QED to high precision and the Sta
Externí odkaz:
http://arxiv.org/abs/1607.06398
We are developing a beam line which compresses the phase space of a standard surface $\mu^+$ beam by 10 orders of magnitude with an efficiency of $10^{-3}$. Phase space compression occurs in a He gas target and consists of three consecutive stages: T
Externí odkaz:
http://arxiv.org/abs/1607.06206
Autor:
Dietz, A. *, Wichmann, G., Kuhnt, T., Pfreundner, L., Hagen, R., Scheich, M., Kölbl, O., Hautmann, M.G., Strutz, J., Schreiber, F., Bockmühl, U., Schilling, V., Feyer, P., de Wit, M., Maschmeyer, G., Jungehülsing, M., Schroeder, U., Wollenberg, B., Sittel, C., Münter, M., Lenarz, T., Klussmann, J.P., Guntinas-Lichius, O., Rudack, C., Eich, H.T., Foerg, T., Preyer, S., Westhofen, M., Welkoborsky, H.J., Esser, D., Thurnher, D., Remmert, S., Sudhoff, H., Görner, M., Bünzel, J., Budach, V., Held, S., Knödler, M., Lordick, F., Wiegand, S., Vogel, K., Boehm, A., Flentje, M., Keilholz, U.
Publikováno v:
In Annals of Oncology October 2018 29(10):2105-2114
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Autor:
Wichmann, G., Antognini, A., Eggenberger, A., Kirch, K., Piegsa, F.M., Soler, U., Stahn, J., Taqqu, D.
Publikováno v:
In Nuclear Inst. and Methods in Physics Research, A 1 April 2016 814:33-38