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Design and commissioning of an ion guide system for In-Gas Laser Ionization and Spectroscopy experiments
摘要： Radio-frequency (RF) ion guides, also known as Linear Paul Traps, are powerful devices to efficiently transport ion beams from high to low pressure regions while keeping good ion optical properties. A set of ion guides comprising three different RF quadrupole (RFQ) structures has been designed using ion-trajectory simulations to improve the performance of the In-Gas Laser Ionizations and Spectroscopy (IGLIS) technique currently under development at KU Leuven. Results of the commissioning tests for the total transport efficiency and transient time through the ion guides as well as the longitudinal energy spread and transverse emittance are found to be in agreement with ion trajectory simulations considering a realistic ion-atom interaction potential.
关键词： Radioactive ion beams,Ion transport,Radiofrequency quadrupole,Nuclear physics,Ion guide,Laser spectroscopy,Exotic nuclei
更新于2025-09-16 10:30:52
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AIP Conference Proceedings [AIP Publishing LLC EXOTIC NUCLEI AND NUCLEAR/PARTICLE ASTROPHYSICS (V). FROM NUCLEI TO STARS: Carpathian Summer School of Physics 2014 - Sinaia, Romania (13–26 July 2014)] - Perspectives for neutron and gamma spectroscopy in high power laser driven experiments at ELI-NP
摘要： The measurement of energy spectra of neutrons and gamma rays emitted by nuclei, together with charge particles spectroscopy, are the main tools for understanding nuclear phenomena occurring also in high power laser driven experiments. However, the large number of particles emitted in a very short time, in particular the strong X-rays flash produced in laser-target interaction, impose adaptation of technique currently used in nuclear physics experiment at accelerator based facilities. These aspects are discussed (Section 1) in the context of proposed studies at high power laser system of ELI-NP. Preliminary results from two experiments performed at Titan (LLNL) and ELFIE (LULI) facilities using plastic scintillators for neutron detection (Section 2) and LaBr3(Ce) scintillators for gamma detection (Section 3) are presented demonstrating the capabilities and the limitations of the employed methods. Possible improvements of these spectroscopic methods and their proposed implementation at ELI-NP will be discussed as well in the last section.
关键词： gamma spectroscopy,neutron spectroscopy,nuclear physics,ELI-NP,high power laser
更新于2025-09-11 14:15:04
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spectroscopy
摘要： We apply point-particle effective field theory to electronic and muonic 4He+ ions, and use it to identify linear combinations of spectroscopic measurements for which the theoretical uncertainties are much smaller than for any particular energy levels. The error is reduced because these combinations are independent of all short-range physics effects up to a given order in the expansion in the small parameters R/aB and Zα (where R and aB are the ion’s nuclear and Bohr radii). In particular, the theory error is not limited by the precision with which nuclear matrix elements can be computed, or compromised, by the existence of any novel short-range interactions, should these exist. These combinations of 4He measurements therefore provide particularly precise tests of quantum electrodynamics. The restriction to 4He arises because our analysis assumes a spherically symmetric nucleus, but the argument used is more general and extendable to both nuclei with spin, and to higher orders in R/aB and Zα.
关键词： 4He+ ions,spectroscopy,quantum electrodynamics,nuclear physics,effective field theory
更新于2025-09-10 09:29:36
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AIP Conference Proceedings [Author(s) SolarPACES 2017: International Conference on Concentrating Solar Power and Chemical Energy Systems - Santiago, Chile (26–29 September 2017)] - Preface: Proceedings of the Turkish Physical Society 34th International Physics Congress
摘要： The Turkish Physical Society 34th International Physics Congress (TPS34) was held in Bodrum, Turkey, from September 4 to September 8, 2017. The congress provided a great opportunity for physicists from all over the world to present and discuss their recent research results in various fields of physics. The congress covered a wide range of topics in physics, including Astrophysics and Cosmology, Atomic and Molecular Physics, Condensed Matter Physics, Nuclear Physics, Particle Physics, Plasma Physics, and many others. The congress was very successful with more than 500 participants from 20 countries.
关键词： Cosmology,Nuclear Physics,Molecular Physics,Astrophysics,Turkish Physical Society,International Physics Congress,Physics,Atomic Physics,Particle Physics,Condensed Matter Physics,Plasma Physics
更新于2025-09-04 15:30:14