Electromagnetic interactions of nucleons and nuclei at low energy and momentum transfer

2005 ◽  
pp. 1-60 ◽  
Author(s):  
Hartmuth Arenhövel
Keyword(s):  
Momentum Transfer ◽  
Low Energy ◽  
Electromagnetic Interactions ◽  
Energy And Momentum

On Length Scales for the Radial Rotating Jet Pressure Exchange Mechanism

2008 ◽  
Author(s):  
Muhammad Umar ◽  
Charles A. Garris
Keyword(s):  
Momentum Transfer ◽  
Near Field ◽  
Exchange Process ◽  
Energy Levels ◽  
Mixing Layer ◽  
Complex Flow ◽  
Transfer Energy ◽  
Length Scales ◽  
Pressure Exchange ◽  
Energy And Momentum

The crypto-steady rotating jet pressure exchange ejector is a novel concept in turbomachinery where two fluids, at different energy levels, come in direct contact with each other to transfer energy and momentum between them through non-steady interface pressure forces. The current paper seeks to provide an insight into the complex flow phenomena occurring inside the radial flow pressure exchange ejector. The primary mechanisms controlling the process are pressure exchange and mixing. This paper will seek to discriminate between energy transfer by each respective mechanism. The energy and momentum transfer in the near field is shown to be mainly due to the pressure exchange process, as the mixing layer does not develop substantially in this region. As the radius increases, the mixing layer tends to grow and the energy and momentum transfer is governed by the mixing process. As a consequence, the length scales of the pressure exchange zone are small, thus making the pressure exchange ejector more compact in size. The paper will delineate between the two length scales. If this new concept is shown to be viable for gas compression at sufficiently high pressure ratios, then, in refrigeration applications, it would enable environmentally benign refrigerants to replace the harmful chlorofluorocarbons (CFC) and reduce the effluence of greenhouse gases. Applications in many other areas, where conventional ejectors are currently used, are also possible.

MOMENTUM-TRANSFER STRUCTURE OF POMERON AT ACCELERATOR ENERGIES

2004 ◽  
Vol 19 (40) ◽  
pp. 3001-3010 ◽  
Author(s):  
M. KAWASAKI ◽  
T. MAEHARA ◽  
M. YONEZAWA
Keyword(s):  
Experimental Data ◽  
Differential Cross Section ◽  
Momentum Transfer ◽  
Cross Section ◽  
Mass Parameter ◽  
Low Energy ◽  
Peripheral Part ◽  
Wide Range ◽  
Diffraction Picture ◽  
Transfer Structure

A representation of Pomeron amplitude derived asymptotically in the framework of the geometrical diffraction picture is shown to be consistent with the gross feature of the experimental data of the differential cross-section of pp and [Formula: see text] scattering in the low energy region [Formula: see text] over a wide range of momentum transfer. It is found that the most peripheral part of the diffraction interaction is characterized by a mass parameter of 0.4–0.5 GeV indicating the dominance of the two-pion states.

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