نتایج جستجو برای: adjacent electron fields

تعداد نتایج: 614428  

Journal: :Medical physics 2012
M Lawless S Junell C Hammer L DeWerd

PURPOSE Thermoluminescent dosimeters are used routinely for dosimetric measurements of photon and electron fields. However, no work has been published characterizing TLDs for use in combined photon and electron fields. This work investigates the response of TLD-100 (LiF:Mg,Ti) in mixed fields of photon and electron beam qualities. METHODS TLDs were irradiated in a 6 MV photon beam, 6 MeV elec...

2016
Daniel Carvalho Knut Müller-Caspary Marco Schowalter Tim Grieb Thorsten Mehrtens Andreas Rosenauer Teresa Ben Rafael García Andrés Redondo-Cubero Katharina Lorenz Bruno Daudin Francisco M. Morales

The built-in piezoelectric fields in group III-nitrides can act as road blocks on the way to maximizing the efficiency of opto-electronic devices. In order to overcome this limitation, a proper characterization of these fields is necessary. In this work nano-beam electron diffraction in scanning transmission electron microscopy mode has been used to simultaneously measure the strain state and t...

2004
Mathew Hannan Barry Blundell

The permeation of technology into our daily lives has resulted in new types of criminal activity and new ways of committing old crimes. As with traditional crime, fundamental to the apprehension of offenders that have adopted technology, is the ability to identify the magnitude of the incident, assess its importance and response in a timely and appropriate manner. Over the past decade many auth...

Journal: :Philosophical transactions. Series A, Mathematical, physical, and engineering sciences 2016
Subir Sachdev

The quantum entanglement of many states of matter can be represented by electric and magnetic fields, much like those found in Maxwell's theory. These fields 'emerge' from the quantum structure of the many-electron state, rather than being fundamental degrees of freedom of the vacuum. I review basic aspects of the theory of emergent gauge fields in insulators in an intuitive manner. In metals, ...

2014
P. Dilip Venugopal Peter L. Coffey Galen P. Dively William O. Lamp Youjun Zhang

The local dispersal of polyphagous, mobile insects within agricultural systems impacts pest management. In the mid-Atlantic region of the United States, stink bugs, especially the invasive Halyomorpha halys (Stål 1855), contribute to economic losses across a range of cropping systems. Here, we characterized the density of stink bugs along the field edges of field corn and soybean at different s...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده علوم 1390

in this thesis, a better reaction conditions for the synthesis of spirobarbiturates catalyzed by task-specific ionic liquid (2-hydroxy-n-(2-hydroxyethyl)-n,n-dimethylethanaminium formate), calcium hypochlorite ca(ocl)2 or n-bromosuccinimide (nbs) in the presence of water at room temperature by ultrasonic technique is provided. the design and synthesis of spirocycles is a challenging task becaus...

Journal: :Physical review letters 2000
Ketzmerick Kruse Springsguth Geisel

We find that a 2D periodic potential, with different modulation amplitudes in the x and y directions, and a perpendicular magnetic field may lead to a transition to electron transport along the direction of stronger modulation and to localization in the direction of weaker modulation. In the experimentally accessible regime we relate this new quantum transport phenomenon to avoided band crossin...

Journal: :Optics letters 2015
Pawan Kumar

The mechanism of a self-generated megagauss magnetic field by an amplitude modulated surface plasma wave (SPW) over a rippled metallic surface is proposed. The amplitude modulated SPW exerts a ponderomotive force on free electrons in the metallic ripple, giving them an oscillatory velocity at the modulation frequency. The oscillatory velocity couples with the electron density in metallic ripple...

2010
A. Le J. Egedal W. Daughton J. F. Drake W. Fox N. Katz

[1] In situ observation of the Earth’s magnetosphere has identified Hall magnetic fields as a key signature of collisionless magnetic reconnection. The inflow portion of the reconnection diffusion region is further characterized by strong electron pressure anisotropy. These two features are tightly linked in a quantitative model, which is verified using fully kinetic simulations. The model pred...

2008
M. Arnaud

I briefly review our current knowledge of the non thermal emission from galaxy clusters and discuss future prospect with Simbol-X. Simbol-X will map the hard X–ray emission in clusters, determine its origin and disentangle the thermal and non-thermal components. Correlated with radio observations, the observation of the non-thermal X-ray emission, when confirmed, will allow to map both the magn...

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