Zobrazeno 1 - 10
of 89
pro vyhledávání: '"Ispirian, K. A."'
The production of gamma-ray Cherenkov-transition radiation (GCTR) by charged particles in the photon energy region 0.8 - 2 MeV is studied theoretically using the results of the recent discovery that in the above mentioned region the dielectric consta
Externí odkaz:
http://arxiv.org/abs/1302.5208
Autor:
Ispirian, K. A., Ispiryan, M. K.
A method is suggested to produce, with the help of colliding laser photons with bunches of relativistic ions having two energy levels, both intense beams of monochromatic polarized X-ray fluorescence photons and significant number of X-ray entangled
Externí odkaz:
http://arxiv.org/abs/1004.0297
After a short review of modern beam monitors, ionization and proportional counters and discussion on the necessity to have thinner wires, we propose and consider construction and parameters of nanotube particle beam monitors and counters
Externí odkaz:
http://arxiv.org/abs/0908.2471
Autor:
Ispirian, K. A., Ispiryan, M. K.
Without developing a correct theory, the rate of the production of entangled photon pairs in the X-ray region by high energy electrons is estimated for experimental parameters used in a few experiments on X-ray parametric down conversion. Taking into
Externí odkaz:
http://arxiv.org/abs/0906.4830
It is shown that the charged particles are refracted and reflected on the boundary of field free and laser field regions in vacuum. Simple and transparent estimates are given which show the possibility of channeling of charged and neutral particles h
Externí odkaz:
http://arxiv.org/abs/0707.0148
Autor:
NA59 Collaboration, Apyan, A., Avakian, R. O., Badelek, B., Ballestrero, S., Biino, C., Birol, I., Cenci, P., Connell, S. H., Eichblatt, S., Fonseca, T., Freund, A., Gorini, B., Groess, R., Ispirian, K., Ketel, T. J., Kononets, Yu. V., Lopez, A., Mangiarotti, A., van Rens, B., Sellschop, J. P. F., Shieh, M., Sona, P., Strakhovenko, V., Uggerhoj, E., Uggerhoj, U. I., Unel, G., Velasco, M., Vilakazi, Z. Z., Wessely, O.
Publikováno v:
Phys.Rev.ST Accel.Beams 11:041001,2008
The processes of coherent bremsstrahlung (CB) and coherent pair production (CPP) based on aligned crystal targets have been studied in the energy range 20-170 GeV. The experimental arrangement allowed for measurements of single photon properties of t
Externí odkaz:
http://arxiv.org/abs/hep-ex/0512017
Results on the Coherent Interaction of High Energy Electrons and Photons in Oriented Single Crystals
Autor:
NA59 Collaboration, Apyan, A., Avakian, R. O., Badelek, B., Ballestrero, S., Biino, C., Birol, I., Cenci, P., Connell, S. H., Eichblatt, S., Fonseca, T., Freund, A., Gorini, B., Groess, R., Ispirian, K., Ketel, T. J., Kononets, Yu. V., Lopez, A., Mangiarotti, A., van Rens, B., Sellschop, J. P. F., Shieh, M., Sona, P., Strakhovenko, V., Uggerhoj, E., Uggerhoj, U. I., Unel, G., Velasco, M., Vilakazi, Z. Z., Wessely, O.
Publikováno v:
Nucl.Instrum.Meth. B234 (2005) 128-137
The CERN-NA-59 experiment examined a wide range of electromagnetic processes for multi-GeV electrons and photons interacting with oriented single crystals. The various types of crystals and their orientations were used for producing photon beams and
Externí odkaz:
http://arxiv.org/abs/hep-ex/0506050
Autor:
NA59 Collaboration, Apyan, A., Avakian, R. O., Badelek, B., Ballestrero, S., Biino, C., Birol, I., Cenci, P., Connell, S. H., Eichblatt, S., Fonseca, T., Freund, A., Gorini, B., Groess, R., Ispirian, K., Ketel, T. J., Kononets, Yu. V., Lopez, A., Mangiarotti, A., van Rens, B., Sellschop, J. P. F., Shieh, M., Sona, P., Strakhovenko, V., Uggerhoj, E., Uggerhoj, U. I., Unel, G., Velasco, M., Vilakazi, Z. Z., Wessely, O.
We present new results regarding the features of high energy photon emission by an electron beam of 178 GeV penetrating a 1.5 cm thick single Si crystal aligned at the Strings-Of-Strings (SOS) orientation. This concerns a special case of coherent bre
Externí odkaz:
http://arxiv.org/abs/hep-ex/0406026
Autor:
NA59 Collaboration, Apyan, A., Avakian, R. O., Badelek, B., Ballestrero, S., Biino, C., Birol, I., Cenci, P., Connell, S. H., Eichblatt, S., Fonseca, T., Freund, A., Gorini, B., Groess, R., Ispirian, K., Ketel, T. J., Kononets, Yu. V., Lopez, A., Mangiarotti, A., van Rens, B., Sellschop, J. P. F., Shieh, M., Sona, P., Strakhovenko, V., Uggerhoj, E., Uggerhoj, U. I., Unel, G., Velasco, M., Vilakazi, Z. Z., Wessely, O.
We present the first experimental results on the use of a thick aligned Si crystal acting as a quarter wave plate to induce a degree of circular polarisation in a high energy linearly polarised photon beam. The linearly polarised photon beam is produ
Externí odkaz:
http://arxiv.org/abs/hep-ex/0306041
Autor:
NA59 Collaboration, Apyan, A., Avakian, R. O., Badelek, B., Ballestrero, S., Biino, C., Birol, I., Cenci, P., Connell, S. H., Eichblatt, S., Fonseca, T., Freund, A., Gorini, B., Groess, R., Ispirian, K., Ketel, T. J., Kononets, Yu. V., Lopez, A., Mangiarotti, A., van Rens, B., Sellschop, J. P. F., Shieh, M., Sona, P., Strakhovenko, V., Uggerhoj, E., Uggerhoj, U. I., Unel, G., Velasco, M., Vilakazi, Z. Z., Wessely, O.
The cross section for coherent pair production by linearly polarised photons in the 20-170 GeV energy range was measured for photon aligned incidence on ultra-high quality diamond and germanium crystals. The theoretical description of coherent bremss
Externí odkaz:
http://arxiv.org/abs/hep-ex/0306028