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SeveralPhaseModulatorsforDigitalShearography¥F.CHEN,Y.Y.HUNG(DepartmentofMechanicalEngineering,OaklandUniversity,RochesterHil... 相似文献
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A new quasi real-time method has been developed for the unambiguous determination of fractional value as well as algebraic sign of fringe orders in hologram interferemetry. Two reference beams are employed in this method. The first exposure is recorded with one reference beam while the second exposure is recorded with the other. In playback, both reference beams are used simultaneously. A calibrated phase shifting device in one reference beam allows for a uniform shifting of fringes and, hence, a means for determining fractional orders. 相似文献
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Self-Injection and Acceleration of Monoenergetic Electron Beams from Laser Wakefield Accelerators in a Highly Relativistic Regime
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H.Yoshitama ;T.Kameshima ;谷渝秋 ;郭仪 ;焦春晔 ;刘红杰 ;彭翰生 ;唐传铭 ;王小东 ;温贤伦 ;温天舒 ;吴玉迟 ;张保汉 ;朱启华 ;黄晓军 ;安维民 ;黄文会 ;唐传祥 ;林郁正 ;王小东 ;陈黎明 ;H.Kotaki ;M.Kando ;K.Nakajima 《中国物理快报》2008,25(8):2938-2941
Self-injection and acceleration of monoenergetic electron beams from laser wakefield accelerators are first investigated in the highly relativistic regime, using 100 TW class, 27 fs laser pulses. Quasi-monoenergetic multi- bunched beams with energies as high as multi-hundredMeV are observed with simultaneous measurements of side-scattering emissions that indicate the formation of self-channelfing and self-injection of electrons into a plasma wake, referred to as a 'bubble'. The three-dimensional particle-in-cell simulations confirmed multiple self-injection of electron bunches into the bubble and their beam acceleration with gradient of 1.5 GeV/cm. 相似文献
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在前文中[1],作者曾评论恒电位伏安法中静止球面电极扩散电流理论公式的验证问题。 相似文献
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YUN-LIANG LI CHEONG WAN LEE KING HUNG LEUNG GUO ZHONG HE DAVID LEE PHILLIPS 《Molecular physics》2013,111(16):2659-2663
We report ultraviolet resonance Raman spectra of bromoform (CHBr3) in cyclohexane solution. The resonance Raman spectra show significant intensity in the overtones of the nominal Br-C-Br symmetric bend (v 6), the nominal H-C-Br asymmetric bend (v3), the nominal Br-C-Br symmetric stretch (v 2) and the nominal Br-C-Br asymmetric stretch (v 5) vibrational modes suggesting that the short-time photodissociation dynamics have noticeable multidimensional character. The lack of strong combination bands between several of the Franck-Condon active modes suggests that more than one electronic transition contribute to the resonance Raman spectra. We briefly discuss the ultraviolet short-time photodissociation dynamics of bromoform and the potential implications for the secondary photodissociation reactions of the initially formed CHBr2 radical. 相似文献