S u m m a r y Two overriding considerations shaped the development of early research on the biological effects of microwave radia t ion--poss ib le medical application (diathermy) and uncer ta in ty about the hazards of exposure to radar. Reports in the late 1940s and early 1950s of hazards resulting from microwave exposure led to the near abandonment of medical research related to microwave di...

The final focus system for the Thomson X-ray scattering experiment termed PLEIADES (Picosecond Laser-Electron InterAction for Dynamic Evaluation of Structures) at LLNL demands ultra-high field gradient quadrupoles in order to focus initially small beams to 1020μm spot sizes. The scheme present here circumvents limitations due to chromatic aberrations and space-charge effects in this relatively ...

In this paper, we present a low-profile, compact, ultrawideband antenna that uses a set of closely coupled radiators. The system of two coupled radiators has two different linearly independent modes of operation with complementary frequency bands of operation. These include the differential mode and the common mode of operation. When the antenna is excited in the common mode of operation, it ac...

by Holly L. Geyer, Heidi Kosiorek, Amylou C. Dueck, Robyn Scherber, Stefanie Slot, Sonja Zweegman, Peter AW te Boekhorst, Zhenya Senyak, Harry C. Schouten, Federico Sackmann, Ana Kerguelen Fuentes, Dolores Hernández-Maraver, Heike L. Pahl, Martin Griesshammer, Frank Stegelmann, Konstanze Döhner, Thomas Lehmann, Karin Bonatz, Andreas Reiter, Francoise Boyer, Gabriel Etienne, Jean-Christophe Iano...

High background radiation area/Mutation-based diseases/Cancer mortality/Down's syndrome Data from the epidemiological investigation on mutation-based diseases in the High Background Radia tion Area (HBRA) of Yangjiang, China, were analyzed. Although the gamma exposure level in the HBRA is three times that of the Control Area (CA) and about ninety percent of the families in the HBRA have lived t...

A manifestly gauge-invariant hamiltonian formulation [1] of classical electrodynamics has been shown to be relativistic invariant by the construction of the generators of the Poincaré Lie algebra. The original formulation in terms of reduced distribution functions for the particles is applied here to the case of two charges interacting through the classical electrodynamical field. A reduced des...

Unstable isotopes and their capacity to emit ionizing radiation have been employed in clinical practice not only for diagnostic, but also for therapeutic purposes, with significant contribution in several fields of medicine and primarily in the management of oncologic patients. Their efficacy is associated with their ability to provide the targeted delivery of ionizing radia‐ tion for a determi...

A prototype of a type quadrupole magnet has been designed and manufactured for the 3 GeV storage ring Siam Photon Source II, second synchrotron light source in Thailand. The required gradient is 51 T/m with effective length being 162 mm. Magnet modeling magnetic field calculation were performed using Radia Opera-3D. bore radius 16 will be operated at excitation 5544 A-turns. mechanical analysis...

Atomic radiations are a very diverse group of physical agents all of which, however, produce damage in living cells. The common property which links them is the ability to knock out electrons from the atoms and molecules through which they pass. This process, known as ionization, is the starting point of radiation injury. Mammalian cells are amongst the most sensitive of all living matter, and ...