Ion Motion Stability Diagram for Distorted Square Waveform Trapping Voltage

2002 ◽  
Vol 8 (3) ◽  
pp. 191-199 ◽  
Author(s):  
M. Sudakov ◽  
E. Nikolaev
Keyword(s):  
Ion Trap ◽  
Stability Diagram ◽  
Ion Trapping ◽  
Stable Region ◽  
Ion Motion ◽  
Motion Stability ◽  
Stability Diagrams ◽  
Duty Cycles ◽  
The Matrix ◽  
Considerable Length

Ion motion in a periodic radio frequency (RF) quadrupole electric field is analysed theoretically by the matrix method and direct trajectory calculation. General properties of the ion motion: stability condition, oscillation spectrum and secular frequency are derived analytically from the elements of the transformation matrix. Stability diagrams for ion motion in the Paul ion trap are presented for rectangular waveforms with different duty cycles (duration of pulse over period). Calculation of the secular frequencies of the ion motion in the ion trap is performed for the first time. The relation of radial and axial secular frequencies along the RF scan line was found to be practically identical in both the square waveform and harmonic voltage cases. Pulse shape distortions, due to resistive-inductive-capacitive filtering in real devices, are considered. Stability diagrams of ion motion in the ion trap with distorted voltage waveforms are calculated. Distortion of the waveform is shown to introduce minor changes in the diagram shape with respect to the diagram for an ideal square wave. Within the first stable region, distortion of the waveform does not lead to any auxiliary parametric resonances of the ion motion. Ion trapping with a pure random pulsed voltage is investigated by means of direct trajectory simulations. It is shown that, in this case, the ion motion can be conditionally stable for a considerable length of time.

Applications of the fractional calculus to study the physical theory of ion motion in a quadrupole ion trap

2017 ◽  
Vol 23 (5) ◽  
pp. 254-271 ◽  
Author(s):  
Sarkhosh S Chaharborj ◽  
Abbas Moameni
Keyword(s):  
Fractional Calculus ◽  
Ion Trap ◽  
Three Dimensional ◽  
Quadrupole Ion Trap ◽  
Stability Diagram ◽  
Mass Separation ◽  
Damping Force ◽  
Ion Motion ◽  
The One ◽  
Fractional Parameter

In this article, fractional calculus has been applied to study the motion of ions in a three-dimensional radio frequency quadrupole ion trap; we have called this arrangement a fractional quadrupole ion trap. The main purpose of the article is to show that by controlling the fractional parameter of a trapped ion, one can gain a more efficient mass separation. In what follows, we will see that with decreasing the fractional parameter, we can achieve a smaller first stability region. Note that a small stability diagram will result in a good and acceptable mass separation. Various methods can be proposed to obtain a desired ion acceleration with a sufficient accuracy for good mass separation, which is similar to the one obtained by a fractional ion trap. Some of these methods are using the effects of a damping force, a magnetic field or both on the confinement of particles in the quadrupole ion trap. The first stability regions are plotted for all of the aforementioned methods, and simulation results are provided to compare them with those for the fractional case.

Numerical analysis of trajectories in a Cassinian ion trap of second order with trap door ion inlet

2021 ◽  
Vol 27 (1) ◽  
pp. 3-12
Author(s):  
Bjoern Raupers ◽  
Hana Medhat ◽  
Juergen Grotemeyer ◽  
Frank Gunzer
Keyword(s):  
Ion Trap ◽  
Ion Traps ◽  
Second Order ◽  
Resolving Power ◽  
Periodic Pattern ◽  
Ion Motion ◽  
Trap Door ◽  
Mass Resolving Power ◽  
Long Time ◽  
The Fourier Transform

Ion traps like the Orbitrap are well known mass analyzers with very high resolving power. This resolving power is achieved with help of ions orbiting around an inner electrode for long time, in general up to a few seconds, since the mass signal is obtained by calculating the Fourier Transform of the induced signal caused by the ion motion. A similar principle is applied in the Cassinian Ion Trap of second order, where the ions move in a periodic pattern in-between two inner electrodes. The Cassinian ion trap has the potential to offer mass resolving power comparable to the Orbitrap with advantages regarding the experimental implementation. In this paper we have investigated the details of the ion motion analyzing experimental data and the results of different numerical methods, with focus on increasing the resolving power by increasing the oscillation frequency for ions in a high field ion trap. In this context the influence of the trap door, a tunnel through which the ions are injected into the trap, on the ion velocity becomes especially important.

Measurement of the effective electric field radius on Digital ion trap spectrometer

The Analyst ◽  
2021 ◽  
Author(s):  
Fuxing Xu ◽  
Weimin Wang ◽  
Bingjun Qian ◽  
Liuyu Jin ◽  
Chuanfan Ding
Keyword(s):  
Electric Field ◽  
Signal Intensity ◽  
Ion Trap ◽  
Great Influence ◽  
Mass Range ◽  
Ion Trapping ◽  
Fundamental Parameter ◽  
Digital Ion Trap ◽  
Effective Electric Field

The effective electric field radius is a fundamental parameter of ion trap which has great influence on ion trapping capability, signal intensity, mass range and some other properties of ion...

Axial ion motion within the quadrupole ion trap elucidated by dc pulse tomography

2000 ◽  
Vol 194 (2-3) ◽  
pp. 225-234 ◽  
Author(s):  
Carsten Weil ◽  
J.Mitchell Wells ◽  
H Wollnik ◽  
R.Graham Cooks
Keyword(s):  
Ion Trap ◽  
Quadrupole Ion Trap ◽  
Ion Motion

Stability of ion motion in the quadrupole ion trap driven by rectangular waveform voltages

2003 ◽  
Vol 230 (1) ◽  
pp. 65-70 ◽  
Author(s):  
Won-Wook Lee ◽  
Soon-Ki Min ◽  
Cha-Hwan Oh ◽  
Pill-Soo Kim ◽  
Seok-Ho Song ◽  
...  
Keyword(s):  
Ion Trap ◽  
Quadrupole Ion Trap ◽  
Ion Motion ◽  
Rectangular Waveform

Ion-Neutral Collision Effects on Ion Trapping and Pseudopotential Depth in Ion Trap Mass Spectrometry

2019 ◽  
Vol 30 (12) ◽  
pp. 2750-2755 ◽  
Author(s):  
Ming Li ◽  
Xinwei Liu ◽  
Xiaoyu Zhou ◽  
Zheng Ouyang
Keyword(s):  
Mass Spectrometry ◽  
Ion Trap ◽  
Ion Trapping ◽  
Ion Trap Mass Spectrometry

scholarly journals Electro-Optical Ion Trap for Experiments with Atom-Ion Quantum Hybrid Systems

2020 ◽  
Vol 10 (7) ◽  
pp. 2222 ◽  
Author(s):  
Elia Perego ◽  
Lucia Duca ◽  
Carlo Sias
Keyword(s):  
Hybrid Systems ◽  
Optical Lattice ◽  
Ion Trap ◽  
Optical Trap ◽  
Paul Trap ◽  
Electric Quadrupole ◽  
Ion Traps ◽  
Ion Trapping ◽  
Ion Collisions ◽  
Ion Interactions

In the development of atomic, molecular, and optical (AMO) physics, atom-ion hybrid systems are characterized by the presence of a new tool in the experimental AMO toolbox: atom-ion interactions. One of the main limitations in state-of-the-art atom-ion experiments is represented by the micromotion component of the ions’ dynamics in a Paul trap, as the presence of micromotion in atom-ion collisions results in a heating mechanism that prevents atom-ion mixtures from undergoing a coherent evolution. Here, we report the design and the simulation of a novel ion trapping setup especially conceived of for integration with an ultracold atoms experiment. The ion confinement is realized by using an electro-optical trap based on the combination of an optical and an electrostatic field, so that no micromotion component will be present in the ions’ dynamics. The confining optical field is generated by a deep optical lattice created at the crossing of a bow-tie cavity, while a static electric quadrupole ensures the ions’ confinement in the plane orthogonal to the optical lattice. The setup is also equipped with a Paul trap for cooling the ions produced by photoionization of a hot atomic beam, and the design of the two ion traps facilitates the swapping of the ions from the Paul trap to the electro-optical trap.

Computation of stability regions for the cylindrical ion trap with no octupole electric field as compared to the corresponding results of the Paul trap

2017 ◽  
Vol 23 (5) ◽  
pp. 272-279
Author(s):  
Houshyar Noshad ◽  
Majid Amouhashemi
Keyword(s):  
Electric Field ◽  
Electric Potential ◽  
Ion Trap ◽  
Paul Trap ◽  
Height Ratio ◽  
Stability Regions ◽  
Stability Diagrams ◽  
Quadrupole Component ◽  
Cylindrical Ion Trap ◽  
The Stability

The cylindrical ion trap is analyzed so that the octupole component of the electric field inside the trap is set to zero. As a consequence, the diameter to height ratio is computed to be 1.20 for which the quadrupole component of the cylindrical ion trap is dominant. Afterwards, it is concluded that the electric potential inside the trap as well as the corresponding stability regions are very similar to those obtained for an ideal Paul trap with pure quadrupole electric field. Furthermore, we drew a conclusion that the stability diagrams of the cylindrical ion trap without octupole term and the stability diagrams of the Paul trap have 5.6%, 3.7%, and 2.9% discrepancy for the first, second, and third stability diagrams, respectively. It should be noted that, expansion of the electric potential inside the cylindrical ion trap in terms of the multipole electric field components and making the advantages of the octupole term elimination has not been reported in the literature previously.

Measurement of Ion Motion Caused by Laser-Induced Stray Charges on Microfabricated Ion Trap Chip Surfaces

2021 ◽  
Author(s):  
Changhyun Jung ◽  
Woojun Lee ◽  
Junho Jeong ◽  
Taehyun Kim ◽  
Dong-Il Dan Cho
Keyword(s):  
Ion Trap ◽  
Ion Motion
Sign in / Sign up

Export Citation Format

Share Document