Conveners
FEL-based study and THz radiation application: Part I
- Oleg Potaturkin (Institute of automation SB RAS)
FEL-based study and THz radiation application: Part II
- Alexander Shkurinov (Faculty of Physics and International Laser Center, Lomonosov Moscow State University, Moscow, Russia)
FEL-based study and THz radiation application: Part III
- Oleg Shevchenko (BINP)
Prof.
Valery Shastin
(IPM RAS)
06/07/2016, 10:20
THz radiation aplication
Invited Oral
FEL-based optical pump-probe technique is usually applied for study of highly non-equilibrium electrons in semiconductors and in particularly for the relaxation of donor or acceptor bound excited states. Here we are focused on intervalley elastic scattering that is typical for donors in silicon crystal. As shown such process results in an additional feature in a pump-probe response that has...
Dr
Sergey Pavlov
(German Aerospace Center)
06/07/2016, 11:00
THz radiation aplication
Invited Oral
The analysis of ateroid’s surface grains allows to match remote observations and modeling of its history and current properties with laboratory experiments. Mass spectrometry and electron microscopy of the dust enables detailed study of the history of asteroidal regolith and compare the results with theoretical considerations of the evolution of rubble piles in the inner solar system. A...
Dr
Vitaly Kubarev
(BINP)
06/07/2016, 11:30
THz radiation aplication
Invited Oral
Methods of single-pulse high-resolution spectroscopy based on powerful tunable radiation of terahertz NovoFEL, ultra-fast technique, and strong magnetic field of superconducting solenoid are presented in the report
Ms
Yulia Choporova
(Budker Institute of Nuclear Physics)
06/07/2016, 13:00
THz radiation aplication
Invited Oral
A one-color pump-probe system has been commissioned at the Novosibirsk free electron laser facility. Results of current experiments on the study of dynamical absorption of semiconductors will be described.
Mr
Vasily Gerasimov
(Budker Institute of Nuclear Physics SB RAS)
06/07/2016, 13:20
THz radiation aplication
Oral
Terahertz surface plasmons propagated along real metal-dielectric structures, as well as their propagation through the macroscopic air gapes between two conducting surfaces, have been studied. The experimental results obtained using terahertz radiation of Novosibirsk free-electron laser and comparison with theory will be presented
Dr
Sergey Pavlov
(German Aerospace Center)
06/07/2016, 13:40
THz radiation aplication
Oral
In the last decade the use of infrared free electron laser facilities enabled observation of inelastic light (Raman) scattering in THz frequency range. Raman-active intracenter donor transitions in silicon fall into the THz range and serve as outgoing resonances in electronic Stokes scattering. At photon fluxes above 1E24 photon/cm2/s donor-related Raman stimulated emission occurs in the range...
Mr
Nils Dessmann
(Humboldt-University Berlin)
06/07/2016, 14:00
THz radiation aplication
Oral
Cooled germanium (Ge) photoconductive detectors are one of the most sensitive detectors at terahertz (THz) frequencies. They are widely used in laboratory spectroscopy and imaging experiments. The speed of a Ge photoconductive detector is set by technical limitations such as the bias circuit, the geometry of the detector crystal and the electric field applied to the .detector. The recovery...
Dr
Vitaly Kubarev
(BINP)
06/07/2016, 14:20
THz radiation aplication
Oral
Threshold conditions, plasma parameters, autooscillations and their stabilization in terahertz optical discharge on NovoFEL are considered in the report
Dr
Young Uk Jeong
(Korea Atomic Energy Research Institute)
06/07/2016, 15:00
THz radiation aplication
Invited Oral
Small-scale accelerator-based radiation sources have been used for developing advanced technologies and exploring new science with high convenience and low cost. Sometimes they are competitive comparing with giant facilities like X-ray free-electron lasers (X-FELs). We have developed a laboratory-scale ultrashort electron accelerator for investigating femtosecond dynamics of atoms or molecules...
Dr
Sergey Kovalev
(HZDR)
06/07/2016, 15:40
THz radiation aplication
Oral
Timing jitter and power instabilities are crucial parameters which greatly reduce the applicability of accelerator driven light sources for time-resolved experiments. In this contribution we present a technique that allows achieving few 10 fs time-resolution in experiments operating at cw repetition rates of up to 100 kHz at presents of timing jitter in order of ps. As we show on the example...
Mr
Andreas Pohl
(Humboldt-University Berlin)
06/07/2016, 16:00
THz radiation aplication
Oral
Coherent synchrotron radiation (CSR) is emitted from bunches of relativistic electrons in a storage ring. The CSR spectrum depends on the shape of the electron bunch from which the CSR radiation is emitted. Instantaneous monitoring of the form and duration of the field transients in CSR pulses is important for applications in pump-probe studies of carrier dynamics in semiconductors and...
Dr
Alexander Kozlov
(Voevodsky Institute of chemical kinetics and combustion SB RAS)
06/07/2016, 16:20
THz radiation aplication
Oral
The present report describes a new phenomenon - short-term exposure of water with focused terahertz radiation of free electron laser leads to the formation of nanoparticle suspension (hydrosol). Composition of the particles formed corresponds to the material of metal containers used in the experiment. Fractional and elemental composition of the particles was determined by atomic force (AFM),...
