Abstract
AbstractThe beam windows of high-energy beam lines are important, and it is sometimes difficult to design because it is necessary to ensure particle propagation with minimum disturbance and fulfill mechanical requirements at the same time. The upstream decay pipe window of the long baseline neutrino facility at Fermilab has an extremely large diameter (1.8 m), with a thickness of only 1.5 mm to separate the helium atmosphere in the decay pipe and the nitrogen atmosphere on the other side. Furthermore, the center of this dish-shaped window is expected to be a 200-mm-diameter beryllium dish welded to the outside aluminum alloy A6061, and this welded combination must withstand extreme conditions of a 2.4-MW, high-energy proton beam without leakage. These severe conditions make the design of this window an unprecedented challenge. This paper describes the static thermal-structural analyses based on which the structure has been optimized, as well as dynamic analyses for understanding the shockwave effects originating in the beam. After optimization, the maximum von Mises stresses in the window decreased significantly in both normal operation and accident cases, making our design very reasonable.
Publisher
Springer Science and Business Media LLC
Subject
Nuclear Energy and Engineering,Nuclear and High Energy Physics
Reference26 articles.
1. Long-Baseline Neutrino Facility (LBNF)/DUNE Conceptual Design Report. September 29, (2017)
2. V. Papadimitriou, K. Ammigan, J. Anderson Jr. et al., Design of the LBNF beamline. Fermilab-Conf-16-163-AD (2017). arXiv:1704.04471
3. J. Heise, The Sanford Underground Research Facility at Homestake. J. Phys. Conf. Ser. 606, 012015 (2015). https://doi.org/10.1088/1742-6596/606/1/012015
4. S.M. Matthews, H. Crannell, J.T. O’Brien et al., A composite thin vacuum window for the CLAS photon tagger at Jefferson lab. Nucl. Instrum. Meth. A 421, 23–30 (1999). https://doi.org/10.1016/S0168-9002(98)00910-3
5. M. Mapes, W.J. Leonhardt, Design of large aperture low mass vacuum windows. J. Vac. Sci. Technol. A 11(4), 1587–1592 (1993). https://doi.org/10.1116/1.578509
Cited by
2 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献