Channeling 2016

Session

S1.2: Channeling & Radiations in Crystals

26 Sept 2016, 11:20

Conveners

S1.2: Channeling & Radiations in Crystals

• FRANK ZIMMERMANN (CERN)

107. Effects of spatial coherency in coherent polarization radiation (transition radiation, Cherenkov radiation, parametric X-radiation).

Prof. Alexander Potylitsyn (Tomsk Polytechnic University)

26/09/2016, 11:20

Oral presentation

Processes of coherent radiation such as transition radiation, Cherenkov radiation, X-ray parametric radiation generated by «pancake-like» short electron bunches with any angle ψ between bunch axes and it’s velocity were investigated. There was shown that the angle of maximal radiation yield of transition radiation is determined by the tilt angle ψ for all cases even if such an angle is much...

74. Non-Dipolarity of Channeling Radiation at GeV Beam Energies

Dr Behnam Azadegan (Hakim Sabzevari University)

26/09/2016, 11:50

Oral presentation

The concept to create a non-conventional intense positron source by application of channeling radiation (CR) generated in a crystalline target by electrons of energy of several GeV was proposed in [1] and experimentally proven later on [2]. In a hybrid-source setup, the generation of radiation in a single radiator crystal is separated from the successive conversion into e+e̶ - pairs in an...

88. On the influence of the PWO crystal structure on the CMS ECAL performance

Prof. Alexander Lobko (Institute for Nuclear Problems, Belarusian State University)

26/09/2016, 12:05

Oral presentation

It was predicted and observed in 1980-th [1-6] that both electron-positron pair production by gamma-quanta and gamma-quanta emission by electrons and positrons are strongly enhanced at the energies exceeding tens of GeV in oriented crystals. Crystals are widely used in the electromagnetic calorimeters, e.g. the electromagnetic calorimeter ECAL of Compact Muon Solenoid at LHC is made of PWO...

176. Development of a compact laser-free accelerator-driven X-ray source based on channeling radiation

Philippe Piot (northern Illinois University & Fermilab)

26/09/2016, 12:20

Oral presentation

Channeling radiation produced from field-emitted electron bunches accelerated in a compact high-duty cycle accelerator could lead to the development of laser-free rugged X-ray sources [C. A. Brau, et al., Synchrotron Radiation News, 25, Issue 1 (2012)]. This type of source could have application in a variety of domains including in medical imaging and industry. In this paper we present our...

32. Induced Resonance Evolution of the channeling electron beam

Prof. Nikolay Kalashnikov (National Research Nuclear University Mephi)

26/09/2016, 12:35

Oral presentation

Induced Resonance Evolution of the channeling electron beam V.V. Ambartsumov1, N.P. Kalashnikov1 1 National Research Nuclear University MEPhI (Moscow Engineering Physics Institute). e-mail: vazgen993@yandex.ru; kalash@mephi.ru Abstract. The motion of channeling particles in the accompanying coordinate system can be considered as one-dimensional oscillator (in the case of planar...

67. Model of the Indirect Compression of Targets under Conditions at an Energy of 1.5 MJ

Dr Galina Vergunova (Lebedev Physical Institute)

26/09/2016, 12:50

Oral presentation

The possibility of the analysis and interpretation of the reported experiments with the megajoule National Ignition Facility (NIF) laser on the compression of capsules in indirect-irradiation targets by means of the one-dimensional RADIAN program in the spherical geometry has been studied. The results of the simulations are in satisfactory agreement with the measurements and correspond to the...