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Showing 1 to 17 of 17 for “"Penning Trap"”.
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Penning trap mass spectroscopy at 0.1 ppb
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1993.
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The penning trap electron gun for the KATRIN experiment
… the calibration sources for this experiment: the Penning trap electron gun. This calibration source will use ion storage techniques usually used in high resolution mass spectroscopy to store and excite electrons to a known energy and then release them with a user-controlled angular distribution. …
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A mass measurement of the short-lived halo nucleus ¹¹Li with the TITAN Penning trap spectrometer
… were made using recently commissioned TITAN Penning trap mass spectrometer at TRIUMF. The measurement of the halo nucleus ¹¹Li represents a new standard in Penning trap mass spectrometry, as it is the shortest lived, t₁/₂ = 8.8 ms, isotope ever weighed using this technique. Low energy, E = 20 …
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A study of the accuracy of the Penning trap mass spectrometer ISOLTRAP and Standard-Model tests with superallowed beta decays
ISOLTRAP ist ein Penningfallen-Massenspektrometer, das an dem on-line Isotopenseparator ISOLDE/CERN installiert ist. Es dient der Messung der atomaren Massen von kurzlebigen radioaktiven Nukliden. Die statistischen Meßungenauigkeiten einzelner Massenmessungen erreichen in etwa 10E-8. Mit Hilfe von …
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A sub-ppb measurement of the mass of cesium for a new determination of the fine-structure constant
This thesis describes recent single-ion Penning trap mass spectrometry measurements of the mass of atomic Cesium with a relative uncertainty of 2 x 10-10. This measurement reduces the uncertainty on the mass of Cesium by a factor of 100, and removes this uncertainty as a limitation on the accuracy …
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Nested Well Plasma Traps
… of a positive and negative component in Penning type traps with nested electric potential wells are presented. Computational techniques for the self-consistent calculation of potential and plasma density distributions are developed. Analyses are presented of the use of nested well Penning …
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A new ion beam cooler and buncher for ISOLTRAP and mass measurements of radioactive argon isotopes
A new ion beam cooler and buncher for ISOLTRAP and mass measurements of radioactive argon isotopes - ISOLTRAP is a Penning trap mass spectrometer installed at ISOLDE/CERN. It is set up to measure the mass of short-lived nuclides with a relative accuracy delta m / m of typically 1* 10^-7. In this …
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Two-ion control and polarization forces for precise mass comparisons
… done by simultaneously confining two ions in a Penning trap, and simultaneously comparing their cyclotron frequencies which are inversely proportional to the masses. The precision of the previous technique of alternately trapping the two ions was completely limited by magnetic field noise. Our …
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First on-line mass measurements at SHIPTRAP and mass determinations of neutron-rich Fr and Ra isotopes at ISOLTRAP
SHIPTRAP is an ion trap facility behind the velocity filter SHIP at GSI/Darmstadt. Its aim are precision studies of transuranium nuclides produced in a fusion reaction and separated by SHIP. The current set-up for high-precision mass measurements consists of three main functional parts: (i) a gas …
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The buffer-gas cell and the extraction RFQ for SHIPTRAP
SHIPTRAP is a new ion trap system for high-precision mass measurements of transuranium recoil-ions from the SHIP facility at GSI. The system consists of a buffer-gas cell to thermalise the incoming ions, an extraction system to separate the ions from the buffer gas, an RFQ buncher to cool and …
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Cold trapped positrons and progress to cold antihydrogen
… is formed and then ionized, allowing us to trap equal numbers of either positrons or electrons over a wide range of conditions. Antiprotons are trapped, cooled, and stacked from the new Antiproton Decelerator facility for the first time. Combining positrons and antiprotons, we have …
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Direct mass measurements beyond the proton drip-line
At GSI in Darmstadt the Penning trap spectrometer SHIPTRAP was set up to perform precision experiments with low-energetic radioactive ions produced in fusion-evaporation reactions at the velocity filter SHIP. First high-precision measurements were performed determining the masses of 18 …
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Development of a MeVVA based beryllium-7 plasma source
… new type of plasma gun ion source for a Malmberg-Penning trap based on Metal Vapor Vacuum Arc (MeVVA) ion source designs. Our primary intent with this MeVVA-type source is to create a confinable beryllium-7 (7-Be) plasma. 7-Be is a peculiar isotope due to its varying radioactive decay half-life in …
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A two-ion balance for high precision mass spectrometry
… results. By confining two different ions in a Penning trap we can now simultaneously measure the ratio of their two cyclotron frequencies, making our mass comparisons insensitive to many sources of fluctuations (e.g. of the magnetic field). To minimize the systematic error associated with the …
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Radioactive Atoms and Molecules for Fundamental Physics
… violation using single molecular ions inside a Penning trap. The experiment's goal is to use the external magnetic field provided by the trap to fine-tune molecular energy levels of opposite parity close to degeneracy, thus increasing the signal produced by parity violating nuclear properties. …
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On the Variability of the Fine Structure Constant
… the time dependence of alpha using particles in Penning traps is compared to the results obtained by existing methods, including those using astrophysical data and those obtained in atomic clock experiments. Suggestions are made on the nature of trapped particles and the trapping fields.
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Design of a positron beam for the study of the entanglement in three gamma-rays generated by positronium annihilation
… of a monoenergetic continuous positron beam, the trapping of the positrons in a buffer-gas trap (BGT) [18,19] and the generation of a dense bunched beam, the extraction of the bunched beam from the magnetic field of the trap, the acceleration, time-compression, and focalization of the positron …