A two-dimensional particle-in-cell (PIC) model is proposed to study the wake field and stopping power induced by a nonrelativistic charged particle moving perpendicular to the external magnetic field in two-component plasmas. The effects of the magnetic field on the wake potential and the stopping due to the polarization of both the plasma ions and electrons are discussed. The velocity fields of plasma ions and electrons are investigated, respectively, in the weak and strong magnetic field cases. Our simulation results show that in the case of weak magnetic field and high ion velocity, the wakes exhibit typical V-shaped cone structures and the opening cone angles decrease with the increasing ion velocity. As the magnetic field becomes strong, the wakes lose their typical V-shaped structures and become highly asymmetrical. Similar results can be obtained in the case of low ion velocity and strong magnetic field. In addition, stopping power is calculated and compared with previous one-dimensional and full three-dimensional PIC results.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1103/PhysRevE.82.026404 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Indirect Detection of the Protons in and around Biradicals and their Mechanistic Role in MAS-DNP.
J Phys Chem Lett
January 2025
National High Magnetic Field Laboratory, Florida State University, 1800 E. Paul Dirac Dr, Tallahassee, Florida 32310, United States.
The contribution of protons in or near biradical polarizing agents in Dynamic Nuclear Polarization (DNP) has recently been under scrutiny. Results from selective deuteration and simulations have previously suggested that the role of protons in the biradical molecule depends on the strength of the electron-electron coupling. Here we use the cross effect DNP mechanism to identify and acquire H solid-state NMR spectra of the protons that contribute to propagation of the hyperpolarization, via an experimental approach dubbed Nuclear-Nuclear Double Resonance (NUDOR).
View Article and Find Full Text PDFDrug Development.
Alzheimers Dement
December 2024
Vanderbilt University Medical Center, Nashville, TN, USA.
Background: We report the case of a 79-year-old woman with Alzheimer's disease who enrolled in a clinical study of lecanemab. After the third, biweekly infusion she suffered a seizure followed by aphasia and progressive encephalopathy. Magnetic resonance imaging revealed multifocal cerebral edema and an increased burden of cerebral microhemorrhages compared to pre-trial imaging.
View Article and Find Full Text PDFDementia Care Practice.
Alzheimers Dement
December 2024
Helen Wills Neuroscience Institute, University of California, Berkeley, CA, USA.
"Dual Perspectives" integrates multiple MRI scans, creating a nuanced synthesis of grey matter and diffusion-based regional connections. This rendering holds particular significance in the realm of Alzheimer's and dementia research by offering a comprehensive examination of data crucial for understanding these complex neurodegenerative conditions. The inclusion of grey matter provides a detailed insight into the structural composition of the brain.
View Article and Find Full Text PDFTechnology and Dementia Preconference.
Alzheimers Dement
December 2024
Deutsches Zentrum für Neurodegenerative Erkrankungen e. V. (DZNE), site Rostock / Greifswald, Rostock, Germany.
Background: Familial Alzheimer's disease research necessitates innovative methodologies to disentangle the intricate relationships between genetic factors and neuroimaging measures. Traditional frequentist approaches, often hampered by small sample sizes in this population and challenges in incorporating prior knowledge transparently, may limit the robustness of findings.
Methods: We analyzed neuroimaging data of preclinical PSNE1 single mutation carriers, utilizing the software JASP to test effects of carrier status on measures of basal forebrain functional connectivity using both frequentist and Bayesian approach.
Combination Antithrombotic Therapy for Reduction of Recurrent Ischemic Stroke in Intracranial Atherosclerotic Disease.
Stroke
January 2025
Population Health Research Institute, University of British Columbia, Vancouver, Canada. (M.A.S., J.W.E., A.H.K., A. Shoamanesh, A.T., R.G.H., A.C., R.Z.).
Background: Stroke secondary to intracranial atherosclerotic disease (ICAD) is associated with high recurrence risk despite currently available secondary prevention strategies. In patients with systemic atherosclerosis, a significant reduction of stroke risk with no increase in intracranial or fatal hemorrhage was seen when rivaroxaban 2.5 mg twice daily was added to aspirin.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!