scholarly journals Electron Transfer Ion/Ion Reactions in a Three-Dimensional Quadrupole Ion Trap:  Reactions of Doubly and Triply Protonated Peptides with SO2•-

2005 ◽  
Vol 77 (6) ◽  
pp. 1831-1839 ◽  
Author(s):  
Sharon J. Pitteri ◽  
Paul A. Chrisman ◽  
Jason M. Hogan ◽  
Scott A. McLuckey
Keyword(s):  
Electron Transfer ◽  
Ion Trap ◽  
Three Dimensional ◽  
Quadrupole Ion Trap ◽  
Protonated Peptides

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.

The three-dimensional quadrupole ion trap

1969 ◽  
Vol 56 (3) ◽  
pp. 109-112 ◽  
Author(s):  
P. H. Dawson ◽  
N. R. Whetten
Keyword(s):  
Ion Trap ◽  
Three Dimensional ◽  
Quadrupole Ion Trap

Computer Simulation of the Operation of a Three-Dimensional Quadrupole Ion Trap

1992 ◽  
Vol 46 (12) ◽  
pp. 1769-1779 ◽  
Author(s):  
Ce Ma ◽  
Heewon Lee ◽  
David M. Lubman
Keyword(s):  
Computer Simulation ◽  
Ion Trap ◽  
Three Dimensional ◽  
Mass Range ◽  
External Source ◽  
Quadrupole Ion Trap ◽  
Operating Conditions ◽  
Resonance Ejection ◽  
Buffer Gas ◽  
High Kinetic Energy

A computer simulation of the motion of ions in a three-dimensional (3-D) quadrupole ion trap has been performed with a Gateway 386 PC/AT computer. The SIMION program was used as the main program to calculate the potential array of the ion trap space. Several user-written programs were interfaced to the SIMION program to simulate the effects of changing various operating conditions, such as the radio-frequency (rf) potential, the collisional buffer gas, external ion injection, dc ejection from the trap, and resonance ejection. With the use of this simulation, the total storage mass range could be obtained as a function of rf voltage and frequency. The simulations show, as expected, that the collisional buffer gas plays an important role in both stabilizing the trajectory of high-kinetic-energy ions (hot ions) inside the ion trap and trapping ions injected from an external source. Several different buffer gases were studied for their effects upon the trapping motion. In addition, both the total mass ejection that results from applying a dc pulse on the output end-cap electrode and the ion ejection that results from applying an rf frequency to the end cap to produce resonance ejection were also studied with this simulation program. It is demonstrated that a simple PC computer using a modified SIMION program provides results very similar to those expected from theory or from previous work.

Radio‐frequency mass selective excitation and resonant ejection of ions in a three‐dimensional quadrupole ion trap

1980 ◽  
Vol 17 (4) ◽  
pp. 829-835 ◽  
Author(s):  
John Edward Fulford ◽  
Duong Nhu‐Hoa ◽  
Richard James Hughes ◽  
Raymond Evans March ◽  
Ronald Francis Bonner ◽  
...  
Keyword(s):  
Radio Frequency ◽  
Ion Trap ◽  
Three Dimensional ◽  
Quadrupole Ion Trap ◽  
Selective Excitation ◽  
Resonant Ejection
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