Influence of ion movement on the bound electron g-factor

In the relativistic description of atomic systems in external fields the total momentum and the external electric field couple to the angular momentum of the individual particles. Therefore, the motional state of an ion in a particle trap influences measurements of internal observables like energy levels or the g-factor. We calculate the resulting relativistic shift of the Larmor frequency and the corresponding g-factor correction for a bound electron in a hydrogen-like ion in the 1S state due to the ion moving in a Penning trap and show that it is negligible at the current precision of measurements. We also show that the analogous energy shift for measurements with an ion in the ground state of a Paul trap vanishes in leading order

Thermal neutron image intensifier tube provides brightly visible radiographic pattern

Vacuum-type neutron image intensifier tube improves image detection in thermal neutron radiographic inspection. This system converts images to an electron image, and with electron acceleration and demagnification between the input target and output screen, produces a bright image viewed through a closed circuit television system

SUB-SEASONAL FORECASTS OF ATMOSPHERIC RIVERS IMPACTING CALIFORNIA AND SOUTHERN EUROPE UTILIZING STREAMFUNCTION ANOMALIES

Atmospheric rivers (ARs) are narrow plumes of moisture that transport a large flux of water vapor into the mid-latitudes. This source of precipitation is vital for the U.S. West Coast, especially California, where seasonal precipitation is highly dependent on these ARs and accounts for up to half its annual precipitation. Due to the reliance on ARs for precipitation, effective water management has become crucial in the U.S. West as wildfires worsen and populations grow, increasing the demand on the entire region’s reservoirs. It is imperative that AR events are forecasted and communicated as early as possible. That is the goal of this thesis, to extend the prediction of ARs into the sub-seasonal timescale. Analysis of streamfunction anomalies (SFA) and the vertical integral of the divergence of geopotential flux (DGF) were done via an anomaly box off the west coast of British Columbia, with the process replicated for a climatologically similar region in the North Atlantic, showing good success to at least 40 days prior to an AR event for both San Francisco and Lisbon, Portugal. This lead time of conditions supporting ARs impacting these two regions is invaluable for forecasters and affiliated stakeholders. While this method will not forecast specific AR events, it can statistically indicate whether more ARs will be likely at the sub-seasonal time scale. The past 28 years of data (1994–2021) were analyzed for trends in SFA and DGF across both anomaly boxes.Outstanding ThesisLieutenant Commander, United States NavyApproved for public release. Distribution is unlimited

Capitalism, Labor and the Totalising Drive of Technology

In this paper I try to illustrate, quite roughly and indicatively, the interconnections between automation technology and social organization. Central to this analysis are the notions of automation, increased productivity in a capitalist society, labor, equality, global inequality and the modern culture of technology. I will end the paper with brief critical remarks on the question of 'robot rights'In this paper I try to illustrate, quite roughly and indicatively, the interconnections between automation technology and social organization. Central to this analysis are the notions of automation, increased productivity in a capitalist society, labor, equality, global inequality and the modern culture of technology. I will end the paper with brief critical remarks on the question of 'robot rights'.Peer reviewe

Optimal Topological Test for Degeneracies of Real Hamiltonians

We consider adiabatic transport of eigenstates of real Hamiltonians around loops in parameter space. It is demonstrated that loops that map to nontrivial loops in the space of eigenbases must encircle degeneracies. Examples from Jahn-Teller theory are presented to illustrate the test. We show furthermore that the proposed test is optimal.Comment: Minor corrections, accepted in Phys. Rev. Let

Parameterization of the Angular Distribution of Gamma Rays Produced by p-p Interaction in Astronomical Environment

We present the angular distribution of gamma rays produced by proton-proton interactions in parameterized formulae to facilitate calculations in astrophysical environments. The parameterization is derived from Monte Carlo simulations of the up-to-date proton-proton interaction model by Kamae et al. (2005) and its extension by Kamae et al. (2006). This model includes the logarithmically rising inelastic cross section, the diffraction dissociation process and Feynman scaling violation. The extension adds two baryon resonance contributions: one representing the Delta(1232) and the other representing multiple resonances around 1600 MeV/c^2. We demonstrate the use of the formulae by calculating the predicted gamma-ray spectrum for two different cases: the first is a pencil beam of protons following a power law and the second is a fanned proton jet with a Gaussian intensity profile impinging on the surrounding material. In both cases we find that the predicted gamma-ray spectrum to be dependent on the viewing angle.Comment: 8 pages, 7 figures, figure 7 updated, accepted for publication in ApJ, text updated to match changes by the editor, two refs updated from preprints to full journal