scholarly journals Compatible stealth design of infrared and radar based on plasma absorption structure

2021 ◽  
Author(s):  
Zhiqiang Gao ◽  
Xu Cuilian ◽  
Xiaoxia Tian ◽  
Changhui Tian ◽  
Jiafu Wang ◽  
...  
Keyword(s):  
Plasma Absorption

scholarly journals Strong Waves from Pulsars and Morphologies in SNRs

1983 ◽  
Vol 101 ◽  
pp. 499-501
Author(s):  
Gregory Benford ◽  
Attilio Ferrari ◽  
Silvano Massaglia
Keyword(s):  
Large Amplitude ◽  
Crab Nebula ◽  
Surrounding Medium ◽  
Low Frequency ◽  
Optical Emission ◽  
Amplitude Wave ◽  
Surface Magnetic Field ◽  
Plasma Absorption ◽  
The Crab Nebula ◽  
Large Amplitude Wave

Canonical models for pulsars predict the emission of low–frequency waves of large amplitudes, produced by the rotation of a neutron star possessing a strong surface magnetic field. Pacini (1968) proposed this as the basic drain which yields to the pulsar slowing–down rate. The main relevance of the large amplitude wave (LAW) is the energetic link it provides between the pulsar and the surrounding medium. This role has been differently emphasized (Rees and Gunn, 1974; Ferrari, 1974), referring to absorption effects by relativistic particle acceleration and thermal heating, either close to the pulsar magnetosphere or in the nebula. It has been analyzed in the special case of the Crab Nebula, where observations are especially rich (Rees, 1971). As the Crab Nebula displays a cavity around the pulsar of dimension ∼1017cm, the function of the wave in sweeping dense gas away from the circumpulsar region is widely accepted. Absorption probably occurs at the inner edges of the nebula; i.e., where the wave pressure and the nebular pressure come into balance. Ferrari (1974) interpreted the wisps of the Crab Nebula as the region where plasma absorption occurs, damping the large amplitude wave and driving “parametric” plasma turbulence, thus trasferring energy to optical radiation powering the nebula. The mechanism has been extended to interpret the specific features of the “wisps” emission (Benford et al., 1978). Possibly the wave fills the nebula completely, permeating the space outside filaments with electromagnetic energy, continuously accelerating electrons for the extended radio and optical emission (Rees, 1971).

scholarly journals Radiation model of a xenon flash lamp in a laser amplifier pump cavity

2015 ◽  
Vol 3 ◽  
Author(s):  
Yongzhong Wu ◽  
Jianqiang Zhu ◽  
Zhixiang Zhang ◽  
Yangshuai Li
Keyword(s):  
Absorption Coefficient ◽  
Gain Coefficient ◽  
Flash Lamp ◽  
Laser Amplifier ◽  
Radiation Model ◽  
Test Technique ◽  
Xenon Flash Lamp ◽  
Simplifying Assumptions ◽  
Plasma Absorption ◽  
Xenon Flash

Understanding the radiation model of a flash lamp is essential for the reflector design of a laser amplifier. Reflector design often involves several simplifying assumptions, like a point or Lambertian source; either of these assumptions may lead to significant errors in the output distribution. In practice, source non-idealities usually result in sacrificing the amplifier’s gain coefficient. We propose a novel test technique for attaining the xenon flash lamp absolute spectral intensity at various angles of view, and then accurately predict radiation distributions and generate the reflector shape. It is shown that due to the absorption of emitted radiation by the lamp itself, the behavior of the radiation model at various wavelengths is different. Numerical results of xenon plasma absorption coefficient were compared with the measured data. A reasonable agreement was obtained for the absorption coefficient parameters. Thus, this work provides a useful analytical tool for the engineering design of laser amplifier reflectors using xenon flash lamps as pumps.

Multiphoton and plasma absorption measurements in CaF2 and UV fused silica at 473 nm

2021 ◽  
Vol 18 (3) ◽  
pp. 035401
Author(s):  
Ya V Grudtsyn ◽  
A V Koribut ◽  
A A Rogashevskii ◽  
Yu A Gerasimova ◽  
V A Trofimov ◽  
...  
Keyword(s):  
Fused Silica ◽  
Plasma Absorption ◽  
Absorption Measurements

Plasma Absorption of Cyanocobalamin Co 57

1974 ◽  
Vol 134 (6) ◽  
pp. 1019 ◽  
Author(s):  
Alfred Doscherholmen
Keyword(s):  
Plasma Absorption

Proximate and Elemental Analysis of Infant Formula

1982 ◽  
Vol 65 (6) ◽  
pp. 1488-1490
Author(s):  
James T Tanner
Keyword(s):  
Infant Formula ◽  
Elemental Analysis ◽  
Fiscal Year ◽  
Caloric Content ◽  
American Academy Of Pediatrics ◽  
Public Health Significance ◽  
Elemental Analyses ◽  
Health Significance ◽  
The Difference ◽  
Plasma Absorption

Abstract The Nutrient Surveillance Branch has been conducting a survey of infant formula products for Fiscal Year 1981. Each product has been carefully analyzed and the results compared to the label declaration and the minimum-maximum limits specified by the American Academy of Pediatrics’ Committee on Nutrition (CON/AAP). Proximate and elemental analyses were made. Protein, fat, ash, and total solids (moisture) were determined by AOAC methods. Osmolality, density, and fatty acids (linoleic) were also determined. Carbohydrates were calculated by difference and caloric content was calculated by using the general Atwater factors. Elemental analysis for Ca, P, Mg, Fe, Zn, Cu, Mn, Na, and K were performed by induction coupled plasma absorption spectroscopy. Chloride was assayed by potentiometric titration with AgNC3. A summary of the findings from the infant formula survey have been compared with CON/AAP recommendations. In general, there were only a few exceptions where the label claims and the CON/AAP requirements were not met. However, in none of these cases was the difference considered to be of public health significance.

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