A linear ion array under a high-order potential well

Abstract

The present invention discloses a linear ion array in a high-order potential trap. A first RF electrode is sandwiched between a first DC electrode and a second DC electrode, and a second RF electrode is sandwiched between a third DC electrode and a fourth DC electrode. Several first and second DC electrodes form pairs of DC electrodes arranged along the same axis with high and low voltage intervals. Several third and fourth DC electrodes form pairs of DC electrodes arranged along the same axis with high and low voltage intervals. An ion chain trapping region is formed in the space sandwiched by the first, second, third, and fourth DC electrodes. A multi-segment electrode structure is employed to excite a specific axial high-order potential in the ion trap space to achieve a uniform linear ion array. This solves the technical problem of large variations in ion spacing in trapped ion chains based on two-dimensional surface ion traps, which limits the operability of ions in experiments.

Description

Technical Field

[0001] The present invention relates to the technical field of ion traps, and in particular to a linear ion array under a high-order potential trap. Background Art

[0002] An ion trap is a device that confines ions in a limited space through an electromagnetic field. A two-dimensional surface trap device can experimentally trap ion arrays. It experimentally divides the ion loading area, ion storage area, ion gate operation area, and auxiliary experimental area. However, during the experiment, due to the large spatial distance between the ion loading area and the experimental operation area, it is necessary to continuously adjust the voltage to move the ions from the storage area to the operation area. In addition, the spacing distribution of the ions is not uniform, which greatly limits the direction of the incident laser in the experimental operation. Based on the method of trapping ion chains in a two-dimensional surface ion trap, for ion arrays with a large number of ions, there are large differences in the ion spacing, which limits the operability of the ions in the experiment. Therefore, the present invention provides a linear ion array under a high-order potential trap, which adopts a multi-segment electrode structure to excite a specific axial high-order potential in the ion trap space to achieve a uniform linear ion array. The axial distribution potential can be adjusted with high precision and a wide range. Summary of the Invention

[0003] The present invention provides a linear ion array under a high-order potential trap, which adopts a multi-segment electrode structure to excite specific axial high-order potential in the ion trap space to realize a uniform linear ion array. The axial distribution potential can be adjusted with high precision and a wide range.

[0004] In view of this, the present invention provides a linear ion array under a high-order potential well, comprising a first RF electrode and a second RF electrode, and a plurality of first DC electrodes, second DC electrodes, third DC electrodes and fourth DC electrodes, each of which can independently control voltages;

[0005] The first RF electrode is sandwiched between the first DC electrode and the second DC electrode, and the second RF electrode is sandwiched between the third DC electrode and the fourth DC electrode;

[0006] A plurality of first DC electrodes and second DC electrodes are arranged in pairs along the same axis with high and low voltages at intervals, and a plurality of third DC electrodes and fourth DC electrodes are arranged in pairs along the same axis with high and low voltages at intervals, forming an ion chain confinement region in a space sandwiched by the first DC electrodes, the second DC electrodes, the third DC electrodes, and the fourth DC electrodes;

[0007] There are at least 5 pairs of DC electrodes.

[0008] Optionally, there are 39 pairs of DC electrode pairs.

[0009] Optionally, the first DC electrode, the second DC electrode, the third DC electrode and the fourth DC electrode are rectangular structures.

[0010] From the above technical solutions, it can be seen that the linear ion array under the high-order potential well provided by the present invention has the following advantages:

[0011] The linear ion array under the high-order potential trap provided by the present invention includes a first RF electrode and a second RF electrode, as well as a plurality of first DC electrodes, second DC electrodes, third DC electrodes, and fourth DC electrodes with independently controllable voltages. The first RF electrode is sandwiched between the first DC electrode and the second DC electrode, and the second RF electrode is sandwiched between the third DC electrode and the fourth DC electrode. A plurality of first DC electrodes and second DC electrodes are arranged in pairs along the same axis with high and low voltage intervals. A plurality of third DC electrodes and fourth DC electrodes are arranged in pairs along the same axis with high and low voltage intervals. An ion chain confinement region is formed in the space sandwiched by the first DC electrode, the second DC electrode, the third DC electrode, and the fourth DC electrode. A simple harmonic ion trap is formed between each group of DC electrode pairs with high and low voltage settings. The more DC electrodes are set, the more ion confinement capabilities can be achieved in a single ion trap system. Ions are stored in adjacent simple harmonic ion traps, and the transfer of ions between different trapped regions can be achieved by adjusting the DC electrode voltage. Several DC electrodes can be selected in any local area to be set in the form of high-order potential, and the transition between multiple simple harmonic traps and long-chain high-order potential traps can be achieved within the ion trap region. Therefore, the linear ion array under the high-order potential trap provided by the present invention adopts a multi-segment electrode structure to excite specific axial high-order potentials in the ion trap space to achieve a uniform linear ion array. The axial distribution potential can be adjusted with high precision and a wide range, solving the technical problem that the distance between ions in the trapped ion chain based on the two-dimensional surface ion trap is large, which limits the operability of ions in experiments.

[0012] At the same time, the linear ion array under the high-order potential trap provided by the present invention can obtain a higher order potential than the five-segment four-blade ion trap, thereby obtaining a more evenly distributed ion chain, and can be directly prepared on a PCB circuit board or silicon substrate using mature processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1A schematic diagram of the cross-sectional structure of a linear ion array under a high-order potential well provided by the present invention;

[0015] Figure 2 This is a schematic diagram of the packaging structure of a linear ion array under a high-order potential well provided by the present invention;

[0016] Figure 3 Schematic diagram of the distribution of the axial potential of a linear ion array in a high-order potential well composed of 39 pairs of electrodes provided in the present invention along with the spatial coordinates. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0018] For easier understanding, see Figure 1 and Figure 2 The present invention provides an embodiment of a linear ion array under a high-order potential well, comprising a first RF electrode and a second RF electrode, and a plurality of first DC electrodes, a second DC electrode, a third DC electrode and a fourth DC electrode whose voltages can be independently controlled. The first RF electrode is clamped between the first DC electrode and the second DC electrode, and the second RF electrode is clamped between the third DC electrode and the fourth DC electrode. A plurality of first DC electrodes and second DC electrodes form DC electrode pairs in pairs and are arranged along the same axis with high and low voltage intervals. A plurality of third DC electrodes and fourth DC electrodes form DC electrode pairs in pairs and are arranged along the same axis with high and low voltage intervals. An ion chain confinement region is formed in the space jointly clamped by the first DC electrode, the second DC electrode, the third DC electrode and the fourth DC electrode.

[0019] It should be noted that the linear ion array under the high-order potential trap provided in the embodiment of the present invention has one or more confinement regions, i.e., ion chain confinement regions, arranged in the same ion trap system. In the ion chain confinement region, a plurality of DC electrode pairs consisting of two DC electrodes (i.e., a first DC electrode and a second electrode) with independently controllable voltages are arranged in the axial direction, and the RF electrode is located between the DC electrode pairs, such as Figure 1 and Figure 2As shown, an ion trap structure of "sausage trap" is formed. The DC electrode pairs arranged in the axial direction of the ion chain confinement region are arranged in the form of high voltage, low voltage, high voltage, low voltage..., and each group of DC electrode pairs with high, low and high voltage settings is a simple harmonic ion trap. The more DC electrode pairs are set, the more ion trapping capabilities can be achieved in a single ion trap system. The ions are stored in adjacent simple harmonic ion traps, and the transfer of ions between different confinement regions can be achieved by adjusting the voltage of the DC electrode pairs. For example, 39 pairs of DC electrode pairs are set in an ion chain confinement region, and their potential in the axial direction is as follows: Figure 3 As shown, the voltages of the DC electrode pairs are in the form of high voltage, low voltage, and high voltage, forming a total of 19 simple harmonic ion traps. Several DC electrode pairs can be selected in any local area to be set in the form of high-order potential. This linear ion array structure under the high-order potential trap can realize the transition between multiple simple harmonic ion traps and long-chain high-order potential traps in the ion trap area. By precisely adjusting the voltage on the multi-segment DC electrode structure, a high-order trapped potential can be generated in the axial direction of the ion trap, so that the ions can be evenly distributed in the axial direction, accommodating more ions, which is more conducive to experimental operations such as single ion addressing. At the same time, in the ion trap device of this structure, the trapped area has good light transmittance, which can relatively easily reduce the micro-motion of the ion array and effectively cool the ions to the ground state of motion.

[0020] In one embodiment, the first DC electrode, the second DC electrode, the third DC electrode, and the fourth DC electrode are rectangular structures. The rectangular DC electrodes can make the linear ion array under the high-order potential well more compact in structure, which is conducive to improving resource utilization within the ion trap system.

[0021] In the linear ion array under the high-order potential trap provided by the embodiment of the present invention, each group of DC electrode pairs with high, low and high voltage settings is a simple harmonic ion trap. The more DC electrodes are set, the more ion trapping capabilities can be achieved in a single ion trap system. Ions are stored in adjacent simple harmonic ion traps, and the transmission of ions between different trapped areas can be achieved by adjusting the DC electrode voltage. Several DC electrodes can be selected in any local area to be set in the form of high-order potential, and the transition between multiple simple harmonic traps and long-chain high-order potential traps can be achieved in the ion trap area. Therefore, the linear ion array under the high-order potential trap provided by the present invention adopts a multi-segment electrode structure to excite specific axial high-order potentials in the ion trap space to achieve a uniform linear ion array. The axial distribution potential can be adjusted with high precision and a wide range, which solves the technical problem that the distance between ions in the trapped ion chain based on the two-dimensional surface ion trap is large, which limits the operability of ions in experiments.

[0022] At the same time, the linear ion array under the high-order potential trap provided by the present invention can obtain a higher order potential than the five-segment four-blade ion trap, thereby obtaining a more evenly distributed ion chain, and can be directly prepared on a PCB circuit board or silicon substrate using mature processes.

[0023] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A linear ion array under a high-order potential well, characterized in that: The device comprises a first RF electrode and a second RF electrode, and a plurality of first DC electrodes, a second DC electrode, a third DC electrode and a fourth DC electrode, each of which has independently controllable voltages; The first RF electrode is sandwiched between the first DC electrode and the second DC electrode, and the second RF electrode is sandwiched between the third DC electrode and the fourth DC electrode; A plurality of first DC electrodes and second DC electrodes are arranged in pairs along the same axis with high and low voltages at intervals, and a plurality of third DC electrodes and fourth DC electrodes are arranged in pairs along the same axis with high and low voltages at intervals, forming an ion chain confinement region in a space sandwiched by the first DC electrodes, the second DC electrodes, the third DC electrodes, and the fourth DC electrodes; There are at least 5 pairs of DC electrodes.

2. The linear ion array under the high-order potential well according to claim 1, characterized in that: There are 39 pairs of DC electrodes.

3. The linear ion array under the high-order potential well according to claim 1, characterized in that: The first DC electrode, the second DC electrode, the third DC electrode, and the fourth DC electrode are rectangular structures.

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