Speaker
Dr
Vardan Margaryan
(Institute of Applied Problems of Physics of NAS RA, 0014, Hr. Nersisyan str. 25, Yerevan, Armenia)
Description
In the works [1,2] it was first observed that the phenomenon of the full pumping of X-rays from transmitted direction to the reflection direction in single quartz crystals in the Laue geometry under the influence of the temperature gradient or acoustic vibrations. In work [3] it was experimentally and theoretically shown that with the help of an acoustic field and temperature gradient it is possible to control the focus location of the diffracted radiation in the space and time.
For the purpose of obtaining a monochromator and a lens with controllable parameters in the range of hard X-rays (30-200 keV) the diffraction of X-radiation in Laue geometry form a quartz single crystal under the influence of a temperature gradient is considered. It is experimentally considered the dependence of the intensity of the diffracted X-radiation of 40 keV from the reflecting atomic planes (10-11) upon the temperature gradient value. The experiment was carried out on the white beam X-ray of Mo anode radiation. As a sample was used quartz single crystal of X-cut with the thickness of 6mm. It was observed the intensity increase of the reflected beam up to 35 times, simultaneously the focusing effect of the reflected beam was observed.
Литература
[1] A.R. Mkrtchyan, M.A. Navasardian, V.K. Mirzoyan 1982, JETP Letters, Vol. 8, No. 11, 677-680,
[2] A.R. Mkrtchyan, M.A. Navasardian, R.G. Gabrielyan and etc. 1983, JETP Letters, Vol. 9, No. 11 , 1181.
[3] Mkrtchyan A.R., Navasardian M.A., Gabrielyan R.G., Kocharian L.A. and Kuzmin R.N. //Solid State Communications. Vol. 59, P. 147,1986.
Primary authors
Dr
Vahan Kocharyan
(Institute of Applied Problems of Physics of NAS RA, 0014, Hr. Nersisyan str. 25, Yerevan, Armenia. National Research Tomsk Polytechnic University 634050, Lenin Avenue 30, Tomsk, Russia.)
Dr
Vardan Margaryan
(Institute of Applied Problems of Physics of NAS RA, 0014, Hr. Nersisyan str. 25, Yerevan, Armenia)
Co-authors
Alexey Gogolev
Mr
Muradyan Tigran
(Institute of Applied Problems of Physics of NAS RA, 0014, Hr. Nersisyan str. 25, Yerevan)
Dr
Poghos Grigoryan
(Institute of Applied Problems of Physics of NAS RA, 0014, Hr. Nersisyan str. 25, Yerevan)
Mr
Sargis Khlopuzyan
(Institute of Applied Problems of Physics of NAS RA, 0014, Hr. Nersisyan str. 25, Yerevan)
