U.S.-Sweden Planning Visit: Research on the Dynamics of Complex Systems with Ion Storage Rings

这个催化项目的目标是加强美国-瑞典亚拉巴马奥本大学的首席研究员迈克尔·费登和斯德哥尔摩大学的理查德·托马斯之间的合作。 他们将一起研究在良好控制的能态和实验散射条件下分子解离的动力学。 他们的研究计划包括在斯德哥尔摩新的双静电离子储存环设施进行研究，该设施被称为双静电离子环实验。该设施是一个独特的离子储存环，允许同时储存阳离子和阴离子物种，从而允许详细调查涉及分子离子的许多过程。团队的成果？在这个系统中的解离动力学的早期研究应该有助于更广泛地理解在更复杂的系统中的类似过程，与原子和分子物理学相关。合作从事美国研究生和建立在PI？他和他的瑞典合作伙伴在电子驱动解离动力学方面的研究？在解离动力学和特定相互作用速率常数测量方面，特别是在天体物理学方面， 通过使用新的环设施来探索离子-离子电荷交换过程中的电子驱动动力学，研究人员希望获得对高层大气中负离子化学的初步了解。 预计在具有灵敏探测器的EQUREE设施的后续工作将有助于确定后续项目的方向，这些项目可以通过增加我们对与大气化学、各种复杂碳系统和生物分子以及天体物理学有关的变化交换机制的基本理解而产生更广泛的影响。 此外，通过参与在欧洲空间实验室进行的初步离子-离子和离子-电子实验，这一及时的发展项目应有助于加强有益的欧美伙伴关系，并为今后在世界一流的欧洲设施（如在德国建造的欧洲空间实验室和低温储存环）进行合作实验提供机会。

The goal of this catalytic project is to strengthen a U.S.-Swedish collaboration between Principal Investigator Michael Fogle of Auburn University, in Alabama, and Richard Thomas at Stockholm University. Together, they will examine the dynamics of molecular dissociation under well controlled energy states and experimental scattering conditions. Their research plan involves conducting studies at the new double, electrostatic, ion storage ring facility in Stockholm, known as DESIREE (Double ElectroStatic Ion Ring ExperimEnt). The DESIREE facility is a unique ion storage ring that allows simultaneous storage of both cation and anion species, thereby permitting detailed investigations of many processes involving molecular ions. Results from the team?s early studies of dissociation dynamics in this system should contribute to broader understanding of similar processes in more complicated systems, with relevance to atomic and molecular physics. The collaboration engages a U.S. graduate student and builds upon the PI?s research in electron-driven dissociation dynamics and his Swedish partner?s expertise in dissociation dynamics and interaction-specific rate constant measurements, particularly for astrophysics. By using the new ring facility to explore electron-driven dynamics in ion-ion charge exchange processes, the researchers expect to gain preliminary insights into negative ion chemistry in the upper atmosphere. Subsequent work at the DESIREE facility with its sensitive detectors is expected to help define direction for follow-on projects that can have broader impacts by adding to our basic understanding of change exchange mechanisms related to atmospheric chemistry, a wide array of complex carbon systems and biomolecules, as well as astrophysics. Furthermore, by participating in the initial ion-ion and ion-electron experiments at DESIREE, this timely developmental project should help to reinforce beneficial Europe-U.S. partnerships and open opportunities for future cooperative experiments at world class European facilities such as DESIREE and the Cryogenic Storage Ring, under construction in Germany.