نتایج جستجو برای: nitrogen laser
تعداد نتایج: 300775 فیلتر نتایج به سال:
To explore the validity of theories forwarded to explain the dynamics of hydrodynamic perturbations on high Mach number blast waves, we have studied the decay rate of perturbations on blast waves traveling through nitrogen gas. In our experiments, 1 kJ pulses from the Z-Beamlet laser at Sandia National Laboratories illuminated solid targets immersed in gas and created blast waves. The polytropi...
Background and purpose: Prevention of dental caries is one of the primary goals in dentistry. Application of fluoride decreased dental demineralization but the preventive ability of this fluoride is limited. Nowadays different investigations into dental erosion focused on the preventive effect of laser irradiation. The purpose of this applied study was to assess the effect of diode laser (&lamb...
We gauged the internal energy transfer for two dissociative ion decomposition channels in matrix-assisted laser desorption ionization (MALDI) using the benzyltriphenylphosphonium (BTP) thermometer ion [PhCH 2PPh 3] (+). Common MALDI matrixes [alpha-cyano-4-hydroxycinnamic acid (CHCA), 3,5-dimethoxy-4-hydroxycinnamic acid (sinapinic acid, SA), and 2,5-dihydroxycinnamic acid (DHB)] were studied w...
Time-resolved study of laser emission in nitrogen gas pumped by two near IR femtosecond laser pulses
The time profile of a lasing signal at 391.4 nm emitted by weakly ionized gas nitrogen molecules low pressure is measured under double excitation with intense femtosecond laser pulses 800 nm. An abrupt decrease in emission occurs the arrival second pulse. It explained transfer population from ground to first excited ionic level and disruption coherence, terminating conditions for V-scheme witho...
The paper describes new combined heating capability of the IPMech RAS inductively coupled plasma facility VGU-4. A 200 W ytterbium laser was added to as a source radiative heating. cylindrical specimen made Buran orbital vehicle’s heat-shielding tile material with black low catalytic coating exposed subsonic pure nitrogen jet and radiation. surface temperature reached 1325 ∘C during convective ...
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