80 research outputs found
The poetical works of Issac Watts : with the life of the author.
No full textMode of access: Internet
Optical emission studies of C2 species in laser-produced plasma from carbon
No full textOptical emission studies of C2 molecules in plasma obtained by Nd:YAG
laser ablation of graphite in a helium atmosphere are reported for irradiances in the
range (1–9:2/ x 1010 W cm−2. The characteristics of the spectral emission intensity
from the C2 (Swan band) species have been investigated as functions of the
distance from the target, ambient pressure and laser irradiance. Estimates of
vibrational temperatures of C2 species under various irradiance conditions are
made. Results of measurements performed under different ambient helium gas
pressures are also discussed
Optical emission studies of C2 species in laser-produced plasma from carbon
No full textOptical emission studies of C2 molecules in plasma obtained by Nd:YAG
laser ablation of graphite in a helium atmosphere are reported for irradiances in the
range (1–9:2/ x 1010 W cm−2. The characteristics of the spectral emission intensity
from the C2 (Swan band) species have been investigated as functions of the
distance from the target, ambient pressure and laser irradiance. Estimates of
vibrational temperatures of C2 species under various irradiance conditions are
made. Results of measurements performed under different ambient helium gas
pressures are also discussed
Twin peak distribution of electron emission profile and impact ionization of ambient molecules during laser ablation of silver target
No full textTwin peak distribution of electron emission profile and impact ionization of ambient molecules during laser ablation of silver target
No full textLaser-induced plasma generated from a silver target under partial vacuum conditions using the
fundamental output of nanosecond duration from a pulsed Nd:yttrium aluminum garnet laser is
studied using a Langmuir probe. The time of flight measurements show a clear twin peak
distribution in the temporal profile of electron emission. The first peak has almost the same duration
as the laser pulse while the second lasts for several microseconds. The prompt electrons are
energetic enough ('60 eV) to ionize the ambient gas molecules or atoms. The use of prompt
electron pulses as sources for electron impact excitation is demonstrated by taking nitrogen, carbon
dioxide, and argon as ambient gases.Cochin University of Science & Technolog
Fragmented: A BFA Thesis in Photography
No full textabstract: Abstract Fragmented: A BFA Thesis in Photography Joshua C. Hendrix I propose that one detailed, coherent thought is a conglomeration of smaller, incomplete shards of ideas. The ways that these ideas take shape is completely dependent on our current perceptions and the circumstances preceding and surrounding the formulation of the idea. This theory can also be applied to our interpretations of artwork, particularly art that is abstract or abstracted. While abstract photography is sometimes dismissed because photographs are supposed to capture the real world, I would argue that our individual perceptions and perspectives influence our responses to even realistic photographs. For this reason, I believe that abstract photography certainly does have unique value. My photographs are presented in five groups of four, and like thought fragments, though individually significant, they are much stronger when perceived in a group as a composite whole
Time resolved study of CN band emission from plasma generated by laser irradiation of graphite
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