Computer codes for automatic tuning of the beam transport at the Unilac

Author(s):  
L. Dahl ◽  
A. Ehrich

Atomic Energy ◽  
2021 ◽  
Author(s):  
L. V. Abramov ◽  
A. V. Baklanov ◽  
A. M. Bakhmet’ev ◽  
I. A. Bylov ◽  
A. A. Vasyuchenkov ◽  
...  


2021 ◽  
Vol 11 (10) ◽  
pp. 4357
Author(s):  
Toby Nonnenmacher ◽  
Titus-Stefan Dascalu ◽  
Robert Bingham ◽  
Chung Lim Cheung ◽  
Hin-Tung Lau ◽  
...  

An electron plasma lens is a cost-effective, compact, strong-focusing element that can ensure efficient capture of low-energy proton and ion beams from laser-driven sources. A Gabor lens prototype was built for high electron density operation at Imperial College London. The parameters of the stable operation regime of the lens and its performance during a beam test with 1.4 MeV protons are reported here. Narrow pencil beams were imaged on a scintillator screen 67 cm downstream of the lens. The lens converted the pencil beams into rings that show position-dependent shape and intensity modulation that are dependent on the settings of the lens. Characterisation of the focusing effect suggests that the plasma column exhibited an off-axis rotation similar to the m=1 diocotron instability. The association of the instability with the cause of the rings was investigated using particle tracking simulations.





1996 ◽  
Vol 118 (4) ◽  
pp. 269-276 ◽  
Author(s):  
A. K. Gupta ◽  
E. Ilanchezhian ◽  
E. L. Keating

Experimental and theoretical studies are presented from a laboratory-scale thermal destruction facility on the destruction behavior of surrogate plastic and nonplastic solid wastes. The nonplastic waste was cellulosic, while the plastic waste contained compounds, such as polyethylene, polyvinyl chloride, polystyrene, polypropylene, nylon, rubber, and polyurethane, or any of their desired mixtures. A series of combustion tests was performed with samples containing varying composition test was performed with samples containing varying composition of plastic and nonplastic. Experimental results are presented on combustion parameters (CO, excess air, residence time) and toxic emissions (dioxin, furan, metals). Equilibrium thermochemical calculations are presented on the thermal destruction behavior of samples under conditions of pyrolysis, combustion, and pyrolysis followed by combustion. Special interest is on the effect of waste properties and input operational parameters on chemistry and product composition. STANJAN and SOLGASMIX computer codes were used in the chemical equilibrium study. Analysis and interpretation of the data reveal the effect of waste feed composition on combustion parameters and dioxin, furan, and metals emission. Equilibrium calculation results are used to describe the experimentally observed trends for the thermal destruction behavior of these wastes. The results show significant influence of plastic on combustion characteristics, and dioxin, furan, and metals emission.



1993 ◽  
Vol 23 (2) ◽  
pp. 83-97 ◽  
Author(s):  
John H. Esling ◽  
Harry Gaylord
Keyword(s):  

The process of assigning computer codes to phonetic symbols began when the 1989 Kiel Convention of the International Phonetic Association was called to revise the Association's alphabet. The Workgroup on Computer Coding formed at that time had the task of determining how to represent the IPA alphabet numerically, and of developing a set of numbers referring to IPA symbols unambiguously. This involved assembling phoneticians who work with computer representations of phonetic symbols, and communicating with specialists in computer coding to gauge the fit between the phonetician's perspective on symbol usage and the non-phonetician's understanding of how to identify and use phonetic symbols. Prior to Kiel, a collection of practical approaches to coded representations was outlined in JIPA (Esling 1988), which dealt mainly with keyboard assignments of characters.





Author(s):  
Young-Ho Kim ◽  
Hyun-kyu Yu


1983 ◽  
Vol 30 (4) ◽  
pp. 2543-2545 ◽  
Author(s):  
J. Klabunde ◽  
M. Reiser ◽  
A. Schonlein ◽  
P. Spadtke ◽  
J. Struckmeier


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