Download Advanced Radiation Sources and Applications: Proceedings of by R. Avakian, K. Ispirian (auth.), Helmut Wiedemann (eds.) PDF

By R. Avakian, K. Ispirian (auth.), Helmut Wiedemann (eds.)

A NATO complicated examine Workshop on ”Advanced Radiation resources and purposes” used to be held from August 29 to September 2, 2004. Hosted by means of the Yerevan Physics Institute, Yerevan, Armenia, 30 invited researchers from former Soviet Union and NATO nations accumulated at Nor-Hamberd, Yerevan, at the slopes of Mount Aragats to debate contemporary theoretical in addition to expe- psychological advancements on technique of generating photons from regularly low strength electrons. Thismeetingbecamepossiblethroughthegenerousfundingprovidedbythe NATO technology Committee and the programme director Dr. Fausto Pedrazzini within the NATO Scienti?c and Environmental Affairs department. The workshop - rectors have been Robert Avakian, Yerevan Physics Institute, Armenia and Helmut Wiedemann, Stanford (USA). Robert Avakian supplied employees, logistics and - frastructure from the Yerevan Physics institute to guarantee a delicate execution of the workshop. targeted thank you is going to Mrs. Ivetta Keropyan for admin- trative and logistics aid to international viewers. The workshop was once held on the institute’s lodge in Nor-Hamberd at the slopes of Mount Aragats no longer faraway from the Yerevan cosmic ray station. The isolation and peaceable environment of the hotel supplied the heritage for a fruitful week of displays and discussions. Following our invites, 38 researchers during this ?eld got here to the workshop from Armenia, Belarus, Romania, Russia, Ukraine, Denmark, France, G- many and america. Commuting from Yerevan neighborhood scientists joined the day-by-day displays. Over a ?ve day interval forty shows have been given.

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Additional resources for Advanced Radiation Sources and Applications: Proceedings of the NATO Advanced Research Workshop, held in Nor-Hamberd, Yerevan, Armenia, August 29 - September 2, 2004

Example text

Angular distributions that was obtained by frequency integration of spectralangular distributions from Fig. 3 within integral limits 'Z/Zȼ=5·10-2 are presented in Fig. 4. For comparison, radiation angular distributions for crystal targets of four thicknesses in symmetrical Bragg geometry are displayed in Fig. 5. e. radiative length of a particle trajectory inside crystal) for Bragg geometry is L0/cosTB, where L0 is target thickness, so radiation intensity increases as function of a crystal thickness.

2 Focusing of channeling radiation In some cases, the extracted channeling radiation, shown in Fig. 3, may be focused if the crystal is smoothly bent. As an example, Fig. 4 shows the focusing of ChR extracted at a right angle from a cylindrically bent crystal. Positrons are channeling along the crystallographic planes denoted G by the reciprocal lattice vector g . A part of channeling radiation with the frequency ZChR equal to the Bragg frequency ZB and with the polarization in the plane of Fig.

A. Khizhnyak, A fine structure of parametric X-ray radiation from relativistic electrons in a crystal, Phys. Lett. A 148, 485-488 (1990). 21. -H. , B. , H. , S. , H. , F. , C. H. , O. Kettig, G. Kube, W. Lauth, H. Schope, Th. , Phys. Rev. Lett. 79, 2462-2465 (1997). 22. V. A. Khizhnyak, Differential properties of parametric X-ray radiation from a thin crystal, Nucl. Instr. and Meth. B 119, 115-122 (1996). 23. T. Ikeda, Y. Matsuda, H. H. Ohtsuki, Parametric X-ray radiation by relativistic channeled particles, Nucl.

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