Radiation from Relativistic Electrons in Periodic Structures "RREPS-19"

Session

Crystal-assisted Processes

7

19 Sept 2019, 14:40

3. Recent advances of crystal channeling in accelerating science.

Yury Chesnokov (Institute for High Energy Physics of NRC Kurchatov Institute (R)

19/09/2019, 14:40

Crystal-assisted processes

Oral

A.G. Afonin, M.Yu.Chesnokov, Yu.A.Chesnokov, V.A.Maisheev, A.A.Yanovich,
Institute for High-Energy Physics (IHEP) in National Research Center “Kurchatov Institute”,
Protvino, Moscow region, 142281 Russia

Ideas of use the particle channeling in bent crystals for steer the beams have been checked up and advanced in many experiments. Recently, a curved single crystal was tested at the LHC...

71. MEASUREMENTS OF CHARGE OF PARTICLES BY A SEMICONDUCTOR DETECTOR

Alexander Shchagin (Kharkov Institute of Physics and Technology)

19/09/2019, 15:00

Crystal-assisted processes

Oral

Usually, magnetic field is used for identification of different accelerated particles. This method is sensitive to the relation Z/M, where Z and M are the charge and mass of the particles respectively. Here, we propose to apply measurements of ionization loss that depends mainly on Z for identification of particles. Recently, we observed carbon ions +6C and its fragments with Z=1,2,3,4,5 of...

79. Possible method of spatial sizes measurement of relativistic electrons beam with small longitudinal bunch length

Prof. Igor Vnukov (Belgorod National Research University)

19/09/2019, 15:20

Crystal-assisted processes

Oral

Possibility of practical realization suggested earlier methodic of electron beam sizes determination for electron bunches with short length by measurement of two-dimensional angular distributions of relativistic electrons coherent emission in a crystal for two distances between a crystal, where the radiation is born, and a coordinate detector [1] is analyzed. As an emission source the...

69. APPLICATION OF SEMICONDUCTOR DETECTORS WITH SMOOTHLY TUNABLE THICKNESS IN SPACE TELESCOPE OF RELATIVISTIC CHARGED PARTICLES

Dr Alexander Shchagin (Kharkov Institute of Physics and Technology)

19/09/2019, 16:00

Crystal-assisted processes

Oral

Space telescopes of charged particles consist of stack of Si detectors and are intended for measurements of energy and direction of motion the particles. The detectors are as Si slabs supplied by permanent bias voltage [1]. We proposed [2] application of Si detectors with smoothly varying by the bias voltage thickness of the depleted zone in the telescope. The application of such detectors...

77. Scintillation Signal Strong Enhancement in an Axially Oriented Lead Tungstate Crystal

Marco Romagnoni (Universita e INFN, Ferrara (IT))

19/09/2019, 16:20

Crystal-assisted processes

Oral

The interaction between a 120 GeV/c electron beam and a 4 mm thick lead tungstate scintillator was investigated at H4 beamline of SPS, in CERN North Area. The high Z target material was chosen in order to provide intense fields (E≈10^11 V/cm). In the beam rest frame, the internal electric fields are enhanced by a Lorentz factor. Thus, the effective field perceived by electrons exceeded...

75. Manufacturing of Silicon Crystals for Steering of Ultra-High Energy Particle Beams

andrea mazzolari (INFN Ferrara)

19/09/2019, 16:40

Crystal-assisted processes

Oral

Physics of interaction between X-rays or gamma beams and crystals have been worldwide investigated at synchrotron where electrons with energy from tens of MeV to few GeV circulating in storage rings produces X-ray beams which are delivered to extracted lines.
Since the ’70, physics of interaction between bent crystals and heavy particles (protons or ions) is investigated at various worldwide...

83. Angular anisotropy of multiple scattering in a crystal

Alexei Sytov (Universita e INFN, Ferrara (IT))

19/09/2019, 17:00

Crystal-assisted processes

Oral

Multiple Coulomb scattering in a crystal is anisotropic due to the presence of the coherent part in the Coulomb scattering cross section. This part depends on the crystal alignment and can be either increased or suppressed by the choice of the crystal alignment. As the result, the r.m.s. multiple scattering angle depends on the crystal orientation.

For the investigation of this process the...