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Estimation of synchrotron-radiation background based on a real beam orbit
Phys. Rev. ST Accel. Beams 7, 072802 – Published 23 July, 2004
DOI: https://doi.org/10.1103/PhysRevSTAB.7.072802
Abstract
Some high-energy experiments have suffered from bitter experience on synchrotron-radiation background. As a measure, we have developed a new calculation method of synchrotron radiation based on a real beam orbit, aiming at quantitative estimations of synchrotron-radiation backgrounds, and the construction of a possible alarm system for the background. An explanation and a demonstration of our method are given.
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References (17)
- KEK Report No. 95-7, edited by N. Toge, 1995.
- Belle SVD Group, G. Alimonti et al., Nucl. Instrum. Methods Phys. Res., Sect. A 453, 71 (2000).
- SAD is a computer program for accelerator designs; http://acc-physics.kek.jp/SAD/sad.html.
- F. James, computer code MINUIT, version 94.1, 1994 (CERN Program Library Long Writeup D506).
- F. James and M. Roos, Comput. Phys. Commun. 10, 343 (1975).
- J. S. Schwinger, Phys. Rev. 75, 1912 (1949).
- S. Kawabata, Comput. Phys. Commun. 88, 309 (1995).
Typically, it takes 10 hours to obtain a wattage distribution per a magnet using SAD; while using our program, shorter than 1 s.
SAD can calculate electric field produced by a point charge according to the Feynman- Heaviside formula which is derived from Maxwell’s equations without any approximation.
- W. R. Nelson, H. Hirayama, and D. W. O. Rogers, SLAC Report No. SLAC-0265, 1985.
- Y. Namito, S. Ban, and H. Hirayama, Nucl. Instrum. Methods Phys. Res., Sect. A 349, 489 (1994).
- Y. Namito, H. Hirayama, and S. Ban, in Proceedings of the International Workshop on EGS4, Tsukuba, Japan, 1997 (KEK, Tsukuba, 1997).
- Y. Namito, H. Hirayama, and S. Ban, Radiat. Phys. Chem. 53, 283 (1998).
- H. Hirayama, Y. Namito, and S. Ban, KEK Internal Report No. 2000-3, 2000.
- Y. Namito and H. Hirayama, KEK Internal Report No. 2000-4, 2000.
- M. Yokoyama et al., IEEE Trans. Nucl. Sci. 48, 440 (2001).
- Belle SVD Group, Belle SVD2 Upgrade Technical Design Report (unpublished).