排序方式: 共有20条查询结果,搜索用时 31 毫秒
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M. B. Gromov O. O. Ivashuk V. Y. Ionidi P. V. Karataev I. A. Kishin A. S. Kubankin A. N. Oleinik A. S. Chepurnov A. V. Shchagin 《Bulletin of the Lebedev Physics Institute》2016,43(11):319-322
A technique for measuring the spatial distribution of X-rays generated by a pyroelectric source is developed and tested. Anisotropy in the spatial distribution of X-rays from the surface perpendicular to the pyroelectric axis of the lithium niobate crystal depending on the piezoelectric crystal axis orientation was detected. The result obtained shows the necessity of considering the effect of piezoelectric properties of pyroelectric crystals on X-ray generation processes. 相似文献
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Kubo K Akemoto M Anderson S Aoki T Araki S Bane KL Blum P Corlett J Dobashi K Emma P Frisch J Fukuda M Guo Z Hasegawa K Hayano H Higo T Higurashi A Honda Y Iimura T Imai T Jobe K Kamada S Karataev P Kashiwagi S Kim E Kobuki T Kotseroglou T Kurihara Y Kuriki M Kuroda R Kuroda S Lee T Luo X McCormick DJ McKee B Mimashi T Minty M Muto T Naito T Naumenko G Nelson J Nguyen MN Oide K Okugi T Omori T Oshima T Pei G Potylitsyn A Qin Q Raubenheimer T Ross M Sakai H Sakai I Schmidt F Slaton T Smith H 《Physical review letters》2002,88(19):194801
Electron beams with the lowest, normalized transverse emittance recorded so far were produced and confirmed in single-bunch-mode operation of the Accelerator Test Facility at KEK. We established a tuning method of the damping ring which achieves a small vertical dispersion and small x-y orbit coupling. The vertical emittance was less than 1% of the horizontal emittance. At the zero-intensity limit, the vertical normalized emittance was less than 2.8 x 10(-8) rad m at beam energy 1.3 GeV. At high intensity, strong effects of intrabeam scattering were observed, which had been expected in view of the extremely high particle density due to the small transverse emittance. 相似文献
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Karataev P Araki S Hamatsu R Hayano H Muto T Naumenko G Potylitsyn A Terunuma N Urakawa J 《Physical review letters》2004,93(24):244802
An experiment on the investigation of optical diffraction radiation (ODR) from a slit target as a possible tool for noninvasive electron beam-size diagnostics has been performed at the KEK accelerator test facility. The experimental setup has been installed at the diagnostics section of the extraction line. We have performed the first incoherent ODR observation from a slit target. The measured angular distributions are in reasonable agreement with the theoretical expectation. The beam-size effect onto the ODR angular pattern has been observed. Moreover, the sensitivity to the beam size as small as 14 microm has been achieved. 相似文献
5.
Karataev P Aryshev A Boogert S Howell D Terunuma N Urakawa J 《Physical review letters》2011,107(17):174801
We represent the first experimental observation of the point spread function (PSF) of optical transition radiation (OTR) performed at KEK-Accelerator Test Facility extraction line. We have demonstrated that the PSF vertical polarization component has a central minimum with a two lobe distribution. However, the distribution width varied significantly with wavelength. We assume that we observed a severe effect from spherical or chromatic aberrations which are not taken into account in any existing theoretical model. We believe that the result of this work will encourage theoreticians to continue developing the theory as it is important for various transition radiation applications. Nonuniform distribution of the OTR PSF creates an opportunity for developing a submicrometer transverse beam size monitor. 相似文献
6.
L. P. Bulat I. A. Drabkin V. V. Karataev V. B. Osvenski? D. A. Pshena?-Severin 《Physics of the Solid State》2010,52(9):1836-1841
This paper reports on a theoretical and experimental investigation of the behavior of the electrical and thermal conductivities
of a nanostructured material based on Bi
x
Sb2 − x
Te3 solid solutions. The effect of boundary scattering has been taken into account by introducing the scattering mechanism with
a constant mean free path equal to the nanoparticle size. A comparison with the results of the measurements has demonstrated
that one can describe satisfactorily the experimental dependences of the electrical and thermal conductivities on the nanoparticle
size by using only the parameters of the initial solid solution and its pure constituents. The estimates have revealed that
the lattice thermal conductivity of nanostructured materials can be reduced by 20–30% as compared to the initial solid solution
with nanoparticle sizes of the order of 20 nm, which should produce a favorable effect on the magnitude of the thermoelectric
figure-of-merit. 相似文献
7.
Nicolas Delerue Sudhir Dixit Fred Gannaway David Howell Myriam Qurshi Grahame Blair Stewart Boogert Gary Boorman Chafik Driouichi Lawrence Deacon Alexander Aryshev Pavel Karataev Nobuhiro Terunuma Junji Urakawa Axel Brachmann Joe Frisch Marc Ross 《Pramana》2007,69(6):1147-1150
A new laser-wire has been installed in the extraction line of the ATF at KEK. It aims at demonstrating that laser-wires can
be used to measure micrometre scale beam size. In parallel, studies have been made to specify a laser suitable for the ILC
laser-wires.
相似文献
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Aleinik A. N. Andreyashkin M. Yu. Kalinin B. N. Karataev P. V. Naumenko G. A. Potylitsyn A. P. Saruev G. A. Sharafutdinov A. F. 《Russian Physics Journal》2001,44(3):292-298
The parameters of an experimental facility based on a 6-MeV microtron are given. In addition to the microtron, the facility includes a beam transport channel, a scattering chamber with a goniometer, detectors of different types, and a system of data collection and processing. A program of immediate future experimental investigations is outlined. 相似文献