High-precision mass measurements for fundamental studies with a four-trap mass spectrometer

使用四阱质谱仪进行基础研究的高精度质量测量

• 批准号: 50377722
• 负责人: Professor Dr. Klaus Blaum
• 金额: --
• 依托单位: Max-Planck-Institut für Kernphysik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2007
• 资助国家: 德国
• 起止时间: 2006-12-31 至 2011-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/50377722?language=en
• 关键词: precision; mass; measurements; fundamental; studies

A novel four-trap system consisting of one monitoring trap, two preparation traps and one measurement trap will be developed and operated. This Penning trap system will be located inside a superconducting magnet with one homogeneous field zone for precision mass measurements on highly charged stable and long-lived ions. The preparation traps allow for the preparation of the reference ion and the ion of interest prior to their transport to the precision trap, where the actual mass measurement takes place. The highly charged ion in the monitoring trap allows for the in-situ calibration and monitoring of the magnetic field stability. The measurements on single ions and the permanent exchange of the ions in the precision trap allow minimizing ion-ion interactions as well as uncertainties due to magnetic field fluctuations. Furthermore, a direct mass difference measurement is possible. It is intended to perform mass measurements with relative uncertainties of <10-11, which corresponds to a mass uncertainty of δm ≈ 2 eV for 238U. This would allow one, e.g., to measure the binding energy of highly charged uranium with none 238U92+ or one electron 238U91+ better than presently achieved by X-ray spectroscopy. A stringent test of quantum electrodynamics and of electron correlations in the little explored regime of extreme electromagnetic fields can be performed.

将开发和运行一个由一个监测阱、两个制备阱和一个测量阱组成的新型四阱系统。这个潘宁阱系统将位于超导磁体内部，具有一个均匀的场区，用于高电荷稳定和长寿命离子的精确质量测量。制备阱允许在参考离子和感兴趣离子传输到精密阱之前制备参考离子和感兴趣离子，在精密阱中进行实际质量测量。监测阱中的高电荷离子允许磁场稳定性的原位校准和监测。对单个离子的测量和离子在精密阱中的永久交换允许最小化离子-离子相互作用以及由于磁场波动引起的不确定性。此外，直接质量差测量是可能的。其目的是进行质量测量，相对不确定度<10-11，相当于238 U的质量不确定度为δm 2 eV。这将允许一个，例如，测量高电荷铀的结合能，没有238 U92+或一个电子238 U91+比目前实现的X射线光谱。量子电动力学和电子相关性的严格测试在极端电磁场的很少探索制度可以执行。

项目成果

PENTATRAP: a novel cryogenic multi-Penning-trap experiment for high-precision mass measurements on highly charged ions

PENTATRAP：一种新型低温多潘宁阱实验，用于高电荷离子的高精度质量测量

• DOI: 10.1007/s00340-011-4823-6
• 发表时间: 2011
• 期刊: Applied Physics B
• 作者: J. Repp;Ch. Böhm;J.R. Crespo López-Urrutia;A. Dörr;S. Eliseev;S. George;M. Goncharov;Yu. Novikov;C. Roux;S. Sturm;S. Ulmer;K. Blaum
• 通讯作者: K. Blaum

One- and two-pulse quadrupolar excitation schemes of the ion motion in a Penning trap investigated with FT-ICR detection

通过 FT-ICR 检测研究潘宁陷阱中离子运动的一脉冲和两脉冲四极激发方案

• DOI: 10.1007/s00340-011-4865-9
• 发表时间: 2011
• 期刊: Applied Physics B
• 作者: M. Heck;K. Blaum;R.B. Cakirli;M. Kretzschmar;G. Marx;D. Rodríguez;L. Schweikhard;S. Stahl;M. Ubieto-Díaz
• 通讯作者: M. Ubieto-Díaz