Pumping parameter

Small changes in the modulated pump parameters Q,f0 and in the pulse parameters 7), T2-f0 induce dramatic changes the output fields. Therefore... 

In the absence of noise, the system [179] describes the generation of a singlemode laser field interacting with a homogeneously broadened two-level medium [180]. The variables and parameters of the Lorenz system can be interpreted in terms of a laser system as q is the normalized electric field amplitude, the normalized polarization, q3 the normalized inversion, a = fe/y1 r = A+l, b = 72/71, with k the decay rate of the field in the cavity, yj and y2 the relaxation constants of the inversion and polarization, and A the pump parameter. Far-infrared lasers have been proposed as an example of a realization of the Lorenz system [162]. A detailed comparison of the dynamics of the system (42) and a far-infrared laser, plus a discussing the validity of the Lorenz system as laser model, can be found in Ref. 163. 

Figure 12. Excitation of the singular mode Ns as a function of the external pump parameter (phonon flux

Table 3.2. Values of polarization moments apo describing optical alignment in the ground (initial) state under linearly polarized Q-type absorption. It is assumed that the pumping parameter y = 1...

Table 3.5. The dependence of the intensity, anisotropy of polarization degree of polarization V and degree of circularity C on the pumping parameter x at the classical limit J — oo...

Fig. 3.9. Degree of polarization V or of circularity C as dependent on the angular momentum quantum number J for pumping parameter x = 0 (curve 1), 10 (curve 2), and oo (curve 3). The calculation was performed according to formulae from Table 3.6.

Fig. 3.21. Connection between the pumping parameter x-1 and the rate of collisional relaxation 7col in the fly-through region 7 < vp/ro (a), and the collisional region 7coi > vp/ro (b). a(jcoi) shows the calculated dependence of the exponent (3.33) on the collisional relaxation rate (c). The beam diameter is assumed to be 2ro = 3 mm.

Let us now consider the situation, discussed in Chapter 3, where the pumping parameter x = rp/7 is sufficiently large to create an anisotropic distribution of angular momenta in the ground state, as described by the... 

The developed mathematical model has been applied for calculation of processes in MHHP intended for vehicle air conditioning [4, 7]. Study of influence of the basic heat pump parameters (pressure of hydrogen charging, temperatures and coolant consumption, cycle time) on its power characteristics has been carried out. It was shown that the estimated data well agreed with experimental results. It was found that the developed model could be used for qualitative investigation of various parameters influence and approximate quantitative assessments. 

The calculation of up-pumping parameters for naphthalene relies on the determination of t(0) from low temperature Raman measurements of doorway vibration transitions. Quite recently Ye et al., used this experimental method to study RDX and y HMX single crystals [140]. Generally speaking, their lineshapes gave values of r(0) that were quite similar to was seen by Hess and Prasad with naphthalene. Thus the naphthalene model for up-pumping appears quite reasonable for RDX and HMX as well. The principle differences are that HMX and RDX have floppy NO2 groups that naphthalene does not, so in Eq. 

The signs of abnormal operation caused by cavitation are local knocking and a slight instability in pump parameters (current, pressure, flow), which can be detected from the control room. No local noise is generated apart from the noise of the pump motor forcing. 

The region of multiple stationary states extends for the pump parameter (equal to pa/pb) from Fi to F3 the line segments with positive slope, marked a and y, are branches of stable stationary states, the line segment with negative slope, marked P, is a branch of unstable stationary states. A system started at an unstable stationary state will proceed to a stable stationary state along... 

Fig. 1.2. Stationary states of the Schldgl model with fixed reactant and products pressures. Plot of the pressure of the intermediate px vs. the pump parameter (pa/pb). The branches of stable stationary states are labeled a and y and the branch of unstable stationary states is labeled p. The marginal stability points are at Fi and F3 and the system has two stable stationary states between these limits. The equistability point of the two stable stationary states is at F2...

The pump parameters Up, Ap and bp can either be calculated or taken from manufacturers documentation. For reciprocating pumps, the losses Ha and //ja both vary in an oscillatory manner with time and are not in phase. 

To fully assess the characteristics of speed manipulation, the now process must be combined with the pump parameters. Flow through a... 

Further requirements are a perfect distribution of the fibers in the suspension. The mixer speed, the line cross section, and the pump parameters have to be adjusted to it. 

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