Low Pressure Anomalies in the Dosimetry and Radiolysis of Gases with High Intensity Electron Pulses

1969 ◽  
Vol 40 (2) ◽  
pp. 255 ◽  
Author(s):  
A. W. Boyd ◽  
D. A. Armstrong ◽  
C. Willis ◽  
O A. Miller
Keyword(s):  
High Intensity ◽  
Low Pressure ◽  
Electron Pulses

Use of Low Pressure Mercury Lamps for the Photodecomposition of Iron Cyanide in Gold Mill Effluents

1985 ◽  
Vol 20 (2) ◽  
pp. 111-119 ◽  
Author(s):  
J.H. Carey ◽  
S.A. Zaidi
Keyword(s):  
Ultraviolet Light ◽  
High Intensity ◽  
Experimental Evaluation ◽  
Low Pressure ◽  
Pilot Scale ◽  
Weak Acid ◽  
Potassium Ferricyanide ◽  
Technical Feasibility ◽  
Iron Cyanide ◽  
Scale Test

Abstract The use of ultraviolet light (UV) from low pressure mercury lamps for destroying iron cyanide in synthetic and actual gold mill effluents was evaluated in this study. For the light intensities used in this study, UV irradiation was not able to efficiently destroy cyanide. However, it converted iron cyanide to a weak acid dissociable form which was destroyed by chlorine. Data from several bench-scale tests and one pilot scale test were used to estimate quantum efficiencies (moles iron cyanide destroyed/einstein). These efficiencies ranged from 0.2% to 1%; approximately 30% to 90% lower than those reported in the literature for potassium ferricyanide. The data collected during the study demonstrated the technical feasibility of using UV in conjunction with chlorination for destroying iron cyanide in gold mill effluents. However, low pressure mercury lamps do not appear to be a practical UV source for this purpose. Irradiation with high intensity lamps may be more practical and is recommended for experimental evaluation.

scholarly journals Phase transformation under beam-target interactions during high-intensity pulsed ion beam irradiation at low pressure

2011 ◽  
Vol 29 (3) ◽  
pp. 283-289 ◽  
Author(s):  
X.P. Zhu ◽  
F.G. Zhang ◽  
Y. Tang ◽  
M.K. Lei
Keyword(s):  
Phase Transformation ◽  
High Intensity ◽  
High Efficiency ◽  
Ion Beam ◽  
Low Pressure ◽  
Ion Source ◽  
Source Material ◽  
Gaseous Species ◽  
Titanium Target ◽  
Ion Species

AbstractNitrides and/or carbonitrides formation of high efficiency was found on titanium target under irradiation of high-intensity pulsed ion beam (HIPIB) with a few shots at a low pressure of 10−2 Pa order, which is extraordinary in comparison with conventional thermo-chemical diffusion process such as gas nitriding and/or carbonitriding of metals necessarily heated at high temperatures during a processing time of hours. The underlying mechanism of the nitrides and carbonitrides formation on titanium targets was explored by a comparative study on three typical HIPIB sources, i.e., TEMP-6, TEMP-4M, and ETIGO-II, varying the irradiation intensity within several J/cm2 per shot of a 60–70 ns pulse duration and the shot number of similar ion species. It is revealed that ambient gases and ion source material are the main sources providing the nitrogen and carbon species for the phase transformation on titanium target at the low pressures, whereas the ion species of HIPIB composition is negligible at a low implantation dose of 1013–1014 ions/cm2. The adsorbed gaseous species, the deposited layer of the ion source material, and in-situ formed compound top layer from reactions between ablation plasma and the ambient species during HIPIB irradiation, can be effectively incorporated into the irradiated target surfaces under a controlled HIPIB-target interaction.

Dosimetry for Thin Biological Samples Irradiated by Nanosecond Electron Pulses of High Intensity

1972 ◽  
Vol 49 (3) ◽  
pp. 495 ◽  
Author(s):  
J. McDonald ◽  
A. Pinkerton ◽  
H. Weiss ◽  
E. R. Epp
Keyword(s):  
Biological Samples ◽  
High Intensity ◽  
Electron Pulses

Disinfecting Unfiltered Secondary Effluent Meeting The Challenge With Low Pressure – High Intensity UV Systems

2000 ◽  
Vol 2000 (2) ◽  
pp. 465-487
Author(s):  
Linda Scroggs ◽  
Dave Richard ◽  
Phil Govea ◽  
George Tchobanoglous
Keyword(s):  
High Intensity ◽  
Low Pressure ◽  
Secondary Effluent

Disinfection Using Low-Pressure High-Intensity UV Lamps for Water Reclamation

2000 ◽  
Vol 2000 (2) ◽  
pp. 441-458
Author(s):  
Ziad El Jack ◽  
Ching-lin Chen ◽  
J.F. Stahl ◽  
R.W. Horvath ◽  
J.F. Kuo
Keyword(s):  
High Intensity ◽  
Low Pressure ◽  
Water Reclamation ◽  
Uv Lamps

Revisiting The Propagation And Focussing Of A High Intensity Electron Beam In A Low-Pressure Gas Cell

2017 ◽  
Author(s):  
Jacques Gardelle ◽  
Beatrice Bicrel ◽  
Baptiste Cadilhon ◽  
Claude Fourment ◽  
Alain Galtie ◽  
...  
Keyword(s):  
Electron Beam ◽  
High Intensity ◽  
Low Pressure ◽  
Gas Cell
Sign in / Sign up

Export Citation Format

Share Document