Rate capability of a cryogenic stopping cell for uranium projectile fragments produced at 1000 MeV/u
| العنوان: | Rate capability of a cryogenic stopping cell for uranium projectile fragments produced at 1000 MeV/u |
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| المؤلفون: | Hans Geissel, R. Knöbel, S. Purushothaman, Julian Bergmann, Peter Dendooven, D. Blum, Christine Hornung, Y.K. Tanaka, M. Pfützner, Helmut Weick, M. Petrick, S. Ayet San Andrés, Ivan Miskun, C. Nociforo, Wayne Lippert, M. Diwisch, Christoph Scheidenberger, F. Heiße, M. Takechi, Moritz P. Reiter, J. Ebert, Ann-Kathrin Rink, Iain Moore, S. Pietri, E. Haettner, Timo Dickel, Florian Greiner, Johannes Lang, F. Amjad, A. Prochazka, C. Jesch, Ilkka Pohjalainen, J. S. Winfield, Wolfgang R. Plaß, Nasser Kalantar-Nayestanaki, X. Xu |
| المساهمون: | Research unit Nuclear & Hadron Physics, Research unit Medical Physics |
| المصدر: | Nuclear instruments & methods in physics research / B 376, 240-245 (2016). doi:10.1016/j.nimb.2015.12.016 Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms, 376, 240-245. ELSEVIER SCIENCE BV |
| سنة النشر: | 2016 |
| مصطلحات موضوعية: | Nuclear and High Energy Physics, EXTRACTION, Fission, Buffer gas, ION-CATCHER, 01 natural sciences, Space charge, Ion, HEAVY-IONS, Nuclear physics, MOBILITIES, Electric field, Ionization, 0103 physical sciences, Rate capability, ddc:530, SPECTROMETER, 010306 general physics, Nuclear Experiment, Instrumentation, SUPER-FRS, HIGH-PRECISION EXPERIMENTS, ta114, 010308 nuclear & particles physics, Chemistry, Projectile, BEAMS, PERFORMANCE, GAS CELL, Extraction efficiency, Extraction time, Cryogenic gas-filled stopping cell, Atomic physics, Beam (structure) |
| الوصف: | At the Low-Energy Branch (LEB) of the Super-FRS at FAIR, projectile and fission fragments will be produced at relativistic energies, separated in-flight, energy-bunched, slowed down and thermalized in a cryogenic stopping cell (CSC) filled with ultra-pure He gas. The fragments are extracted from the stopping cell using a combination of DC and RF electric fields and gas flow. A prototype CSC for the LEB has been developed and successfully commissioned at the FRS Ion Catcher at GSI. Ionization of He buffer gas atoms during the stopping of energetic ions creates a region of high space charge in the stopping cell. The space charge decreases the extraction efficiency of stopping cells since the high amount of charge distorts the applied DC electric drag fields. Thus the understanding of space charge effects is of great importance to make full use of the high yields at future RIB facilities such as the Super-FRS at FAIR. For this purpose a detailed study of space charge effects in the CSC was performed using experiments and simulations. The dependence of the extraction efficiency, the extraction time and the temporal ion extraction profile on the intensity of the impinging beam and the electric field strength was studied for two different U-238 projectile fragments produced at 1000 MeV/u and separated with the FRS. Good agreement between experiments and simulations was found. (C) 2015 Elsevier B.V. All rights reserved. |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 0168-583X |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3480e82a9b4262e3ee4a6fbbb910f8d5Test https://hdl.handle.net/11370/dd05c4fe-077f-49ba-9640-e7eb21a48d42Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....3480e82a9b4262e3ee4a6fbbb910f8d5 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 0168583X |
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