THE INFINITY CELL - A NEW TRAPPED-ION CELL WITH RADIOFREQUENCY COVERED TRAPPING ELECTRODES FOR FOURIER-TRANSFORM ION-CYCLOTRON RESONANCE MASS-SPECTROMETRY
THE INFINITY CELL - A NEW TRAPPED-ION CELL WITH RADIOFREQUENCY COVERED TRAPPING ELECTRODES FOR FOURIER-TRANSFORM ION-CYCLOTRON RESONANCE MASS-SPECTROMETRY
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DOI：
10.1002/oms.1210260527
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发表时间：
1991-05-01
期刊：
影响因子：
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通讯作者：
ALLEMANN, M
中科院分区：
文献类型：
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作者：
CARAVATTI, P;ALLEMANN, M
对傅里叶变换离子回旋共振质谱中的激发事件进行优化，以获得更可靠的相对信号强度并增强多串联质谱实验中的离子选择性能。 标准俘获离子电池会遭受沿电池对称轴（z 轴）的不良离子喷射，该对称轴的方向与磁场线平行。 这种 z 喷射效应很难预测，因此很难避免，特别是当对离子应用复杂的宽带激励方案时。 讨论了一种改进的捕获离子池设计，称为“无限池”，它消除了 z 喷射。 无限单元概念基于这样的发现：可以用有限尺寸的单元来模拟无限长单元的电激励场。 通过比较标准单元和无限单元的操作，在几个合适的实验中证明了 z 喷射效应的实际消除。
The excitation event in Fourier transform ion cyclotron resonance mass spectrometry is optimized in order to obtain more reliable relative signal intensities and enhance the ion-selection performance in multi-tandem mass spectrometric experiments. Standard trapped-ion cells suffer from the undesirable ejection of ions along the symmetry axis (z-axis) of the cell, which is oriented parallel to the magnetic field lines. This z-ejection effect is difficult to predict, and thus difficult to avoid, especially when complicated broad-band excitation schemes are applied to the ions. An improved trapped-ion cell design, referred to as the 'Infinity Cell', is discussed which eliminates z-ejection. The Infinity Cell concept is based on the finding that it is possible to model the electric excitation field of an infinitely long cell with a cell of finite dimensions. The virtual elimination of z-ejection effects is demonstrated in several suitable experiments by comparing the operation of the standard cell and the Infinity Cell.