[1] Energetic proton (1–45 keV) distributions measured by the magnetospheric plasma analyzer detector on Los Alamos National Laboratory geosynchronous orbiting satellites are analyzed to study the characteristics of proton ring development during the 2001 April storm. Distinct proton rings are formed over a broad spatial region from noon to premidnight, associated with individual or multiple su...

Proton radiotherapy has the potential to provide state-of-the-art dose conformality in tumor area, reducing possible adverse effects on surrounding organs at risk. However, uncertainties exact location of proton Bragg peak inside patient prevent this technique from achieving full clinical potential. In context, vivo verification range protons patients is key reduce uncertainty margins. Protoaco...

Purpose The objective of this study was to investigate the dosimetric impact range uncertainty in a large cohort patients receiving passive scatter proton therapy. Methods A 120 were reviewed retrospectively, which 61 brain, 39 lung, and 20 prostate patients. Range uncertainties ±3.5% (overshooting undershooting by 3.5%, respectively) added recalculated on original plans, had been planned accor...

An experimental effort has been undertaken to investigate the production of halo particles in a proton beam having significant space charge forces. The LEDA RFQ was used to inject a pulsed 6.7 MeV 1575 mA beam into a linear FODO channel. Four matching quads at the input of this 52-quadrupole transport line were used to generate specific mismatch oscillations, believed to be a key mechanism in t...

Determinations of aluminum (Al) in serum are performed routinely by laboratories through customer-validated applications. Graphite furnace atomic absorption spectroscopy (GFAAS) is one of only a few routine techniques with a dynamic range sensitive enough to be used clinically in customervalidated applications to measure Al in serum. There are a few specific analytical challenges that an analys...