Sysoev Alexey A, Troyan Victor I, Borisyuk Peter V, Krasavin Andrey V, Vasiliev Oleg S, Palchikov Vitaly G, Avdeev Ivan A, Chernyshev Denis M, Poteshin Sergey S
National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), 115409, Kashirskoe shosse 31, Moscow, Russian Federation. Linantec Ltd, 115409, Kashirskoe shosse 31, Moscow, Russian Federation.
National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), 115409, Kashirskoe shosse 31, Moscow, Russian Federation.
Eur J Mass Spectrom (Chichester). 2015;21(1):1-12. doi: 10.1255/ejms.1329.
There is a growing need for the development of atomic and nuclear frequency standards because of the important contribution of methods for precision time and frequency measurements to the development of fundamental science, technology, and the economy. It is also conditioned by their potential use in optical clocks and quantum logic applications. It is especially important to develop a universal method that could allow one to use ions of most elements effectively (including ones that are not easily evaporated) proposed for the above-mentioned applications. A linear quadrupole ion trap for the optical spectroscopy of electron and nuclear transitions has been developed and evaluated experimentally. An ion source construction is based on an ultra-high vacuum evaporator in which a metal sample is subjected to an electron beam of energy up to 1 keV, resulting in the appearance of gaseous atoms and ions of various charge state. The linear ion trap consists of five successive quadrupole sections including an entrance quadrupole section, quadrupole mass filter, quadrupole ion guide, ion-trap section, and exit quadrupole section. The same radiofrequency but a different direct current voltage feeds the quadrupole sections. The instrument allows the mass and energy selected trapping of ions from ion beams of various intensities and their localization in the area of laser irradiation. The preliminary results presented show that the proposed instrument and methods allow one to produce effectively up to triply charged thorium ions as well as to trap ions for future spectroscopic study. The instrument is proposed for future use in optical clocks and quantum logic application development.
由于精密时间和频率测量方法对基础科学、技术和经济发展的重要贡献，对原子和核频率标准的开发需求日益增长。这也取决于它们在光钟和量子逻辑应用中的潜在用途。开发一种通用方法尤为重要，该方法能够有效地使用大多数元素的离子（包括不易蒸发的离子）用于上述应用。已开发出一种用于电子和核跃迁光学光谱的线性四极离子阱，并进行了实验评估。离子源结构基于超高真空蒸发器，其中金属样品受到能量高达1 keV的电子束照射，从而产生各种电荷态的气态原子和离子。线性离子阱由五个连续的四极部分组成，包括入口四极部分、四极质量过滤器、四极离子导向器、离子阱部分和出口四极部分。相同的射频但不同的直流电压馈入四极部分。该仪器允许对来自各种强度离子束的离子进行质量和能量选择捕获，并将它们定位在激光照射区域。给出的初步结果表明，所提出的仪器和方法能够有效地产生高达三价的钍离子，并捕获离子用于未来的光谱研究。该仪器被提议用于未来的光钟和量子逻辑应用开发。
