Nonlinear effects induced in the normalized ion density in a linear trap system for a large ion cloud

2018 ◽  
Vol 53 (10) ◽  
pp. 927-933
Author(s):  
Laura Pedrosa-Rodriguez ◽  
D.A. Outerelo ◽  
Francisco J. Diaz-Otero
Keyword(s):  
Nonlinear Effects ◽  
Ion Density ◽  
Linear Trap ◽  
Trap System ◽  
Ion Cloud

A simulation study of excitation contour of a linear trap with spatial harmonics

2021 ◽  
pp. 146906672110201
Author(s):  
NV Konenkov
Keyword(s):  
Ion Trap ◽  
Theoretical Description ◽  
Resonance Peak ◽  
Linear Ion Trap ◽  
Linear Trap ◽  
Ion Fragmentation ◽  
Excitation Time ◽  
Detailed Simulation ◽  
Trajectory Method ◽  
Ion Cloud

The process of nonlinear resonant excitation of ion oscillations in a linear trap is studied. There is still no detailed simulation of the resonance peak in the literature. We propose to use the excitation contour to describe the collective ion resonance. The excitation contour is a resonant mass peak obtained by the trajectory method with the Gaussian distribution of the initial coordinates and velocities. The following factors are considered: excitation time, low order hexapole and octopole harmonics with amplitudes A3 and A4, the depth of the initial ion cloud position. These multipoles are used for selective ion ejection from linear ion trap. All these factors affect the ion yield and the shape of the contours. Obtained data can be useful for control of such processes as ion fragmentation, ion isolation, ion activation, and ion ejection. Simulated resonance peaks are important for the theoretical description of the ion collective nonlinear resonances.

scholarly journals ESTIMATION OF SPACE CHARGE INFLUENCE ON RESOLUTION OF ION-MOBILITY SPECTROMETER

2021 ◽  
Vol 31 (4) ◽  
pp. 41-54
Author(s):  
I. V. Kurnin ◽  
Keyword(s):  
Space Charge ◽  
Numerical Solution ◽  
Analytical Model ◽  
Ion Mobility ◽  
Ion Density ◽  
Ion Mobility Spectrometer ◽  
Reaction Region ◽  
Ion Cloud ◽  
Comparison Of The Results

The paper presents an analytical model describing the dynamics of ion cloud, taking into account the action of space charge during a motion in ion mobility spectrometer — starting from the reaction region, where the shutter forms an ion pulse, and the further drift of the formed ion pulse towards the collector. The presented model lets to estimate the degree of influence of the space charge on possible ion losses and the resolution of ion mobility spectrometer. The effect of the space charge becomes noticeable, starting with the ion density of 106 cm–3. Comparison of the results obtained using the analytical model with the results of numerical solution of the initial equations shows that they practically coincide.

Progress and research at the Shanghai EBIT

2008 ◽  
Vol 86 (1) ◽  
pp. 321-325 ◽  
Author(s):  
W Hu ◽  
Y Fu ◽  
P Gong ◽  
K Yao ◽  
D Lu ◽  
...  
Keyword(s):  
Charge State ◽  
Beam Diameter ◽  
Short Discussion ◽  
Preliminary Measurement ◽  
Ion Density ◽  
X Ray ◽  
Operational Conditions ◽  
Charge State Distributions ◽  
Ion Cloud ◽  
Electron Beam Diameter

In this report, a brief description of the current progress at the Shanghai EBIT project is presented. This is followed by a short discussion of the measurement of various parameters (electron beam diameter and ion density) under a number of operational conditions. A brief introduction to di-electronic recombination measurements for highly ionized xenon is given. Next, we present a preliminary measurement of the time dependence of xenon X-ray emission lines. Finally, a comparison of calculated and experimental charge-state distributions is given. This shows the influence of multi-electron capture and different distributions of the ion cloud on the charge state distribution.PACS Nos.: 41.85.–p; 34.80.Kw; 34.80Lx

Multiple Crossover Effects and Nonlinear Effects on Socio-Cultural Adjustment

2004 ◽  
Author(s):  
Riki Takeuchi ◽  
David P. Lepak ◽  
Sophia Marinova ◽  
Seokhwa Yun
Keyword(s):  
Nonlinear Effects ◽  
Cultural Adjustment ◽  
Crossover Effects

Nonlinear effects in a plasma

1966 ◽  
Vol 90 (11) ◽  
pp. 435-489 ◽  
Author(s):  
Vadim N. Tsytovich
Keyword(s):  
Nonlinear Effects

Nonlinear effects in metals under anomalous-skin conditions

1980 ◽  
Vol 130 (2) ◽  
pp. 357 ◽  
Author(s):  
T.S. Velichkina ◽  
O.I. Vasil'eva ◽  
A.N. Izrailenko ◽  
I.A. Yakovlev
Keyword(s):  
Nonlinear Effects ◽  
Skin Conditions

Some problems of investigation of nonlinear effects in elastomers with long cyclic destruction

2019 ◽  
pp. 77-88
Author(s):  
V.I. Dyrda ◽  
◽  
S.M. Grebenyuk ◽  
S.P. Sokol ◽  
S.B. Slobodian ◽  
...  
Keyword(s):  
Nonlinear Effects

Ultrashort pulses propagation through different approaches of the Split-Step Fourier method

2018 ◽  
Vol 1 (3) ◽  
pp. 2
Author(s):  
José Stênio De Negreiros Júnior ◽  
Daniel Do Nascimento e Sá Cavalcante ◽  
Jermana Lopes de Moraes ◽  
Lucas Rodrigues Marcelino ◽  
Francisco Tadeu De Carvalho Belchior Magalhães ◽  
...  
Keyword(s):  
Energy Conservation ◽  
Optical Pulse ◽  
Time Window ◽  
Fourier Method ◽  
Ultrashort Pulses ◽  
Nonlinear Effects ◽  
Single Mode ◽  
Time Algorithm ◽  
Optical Pulses ◽  
Running Time

Simulating the propagation of optical pulses in a single mode optical fiber is of fundamental importance for studying the several effects that may occur within such medium when it is under some linear and nonlinear effects. In this work, we simulate it by implementing the nonlinear Schrödinger equation using the Split-Step Fourier method in some of its approaches. Then, we compare their running time, algorithm complexity and accuracy regarding energy conservation of the optical pulse. We note that the method is simple to implement and presents good results of energy conservation, besides low temporal cost. We observe a greater precision for the symmetrized approach, although its running time can be up to 126% higher than the other approaches, depending on the parameters set. We conclude that the time window must be adjusted for each length of propagation in the fiber, so that the error regarding energy conservation during propagation can be reduced.

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