Investigation of a Possible Material-Saving Approach of Sputtering Techniques for Radiopharmaceutical Target Production

2021 ◽  
Vol 11 (19) ◽  
pp. 9219
Author(s):  
Alisa Kotliarenko ◽  
Oscar Azzolini ◽  
Giorgio Keppel ◽  
Cristian Pira ◽  
Juan Esposito
Keyword(s):  
Target Material ◽  
Deposition Process ◽  
Solid Target ◽  
Analysis Method ◽  
Loss Analysis ◽  
Material Recovery ◽  
Medical Radioisotopes ◽  
Target Production ◽  
Thick Coatings ◽  
Material Saving

Magnetron sputtering (MS) is a relatively new deposition technique, which is being considered among the cyclotron solid target (CST) manufacturing options now available, aiming at the medical radioisotopes yield for radiopharmaceutical production. However, the intrinsic high material losses during the deposition process do not permit its use with extremely expensive target materials, such as isotopically enriched metals/oxides. In this study, R&D technology for a new recovering shield is instead proposed to assess the dissipation of target material during the sputtering processes and, thus, an estimate of the material recovery that may be feasible and the related amount. The weight-loss analysis method is used to assess the material losses level inside the chamber during processing. In all tests carried out, a high-purity copper (99.99%) was used as a target material. As a result of this study, the material distribution for both magnetron and diode sputtering depositions can be calculated. The feasibility of the ultra-thick coatings growing, devoted to CST production, is demonstrated.

Capacitor loss analysis method for power electronics converters

2018 ◽  
Vol 88-90 ◽  
pp. 443-446 ◽  
Author(s):  
H. Matsumori ◽  
K. Urata ◽  
T. Shimizu ◽  
K. Takano ◽  
H. Ishii
Keyword(s):  
Power Electronics ◽  
Analysis Method ◽  
Loss Analysis ◽  
Power Electronics Converters

A study on iron loss analysis method considering the harmonics of the flux density waveform using iron loss curves tested on epstein samples

2003 ◽  
Vol 39 (3) ◽  
pp. 1472-1475 ◽  
Author(s):  
Hyuk Nam ◽  
Kyung-Ho Ha ◽  
Jeong-Jong Lee ◽  
Jung-Pyo Hong ◽  
Gyu-Hong Kang
Keyword(s):  
Flux Density ◽  
Iron Loss ◽  
Analysis Method ◽  
Loss Analysis

Wake and Loss Analysis for a Double Bladed Swept Propeller

2016 ◽  
Author(s):  
Alexandre Capitao Patrao ◽  
Richard Avellán ◽  
Anders Lundbladh ◽  
Tomas Grönstedt
Keyword(s):  
High Speed ◽  
Energy Analysis ◽  
Complex Geometry ◽  
Analysis Method ◽  
Aircraft Wings ◽  
Loss Analysis ◽  
Propeller Wake ◽  
Induced Drag ◽  
Propeller Blades ◽  
Tip Velocity

Inspired by Prandtl’s theory on aircraft wings with minimum induced drag, the authors introduced a double-bladed propeller, the Boxprop, intended for high-speed flight. The basic idea is to join the propeller blades pair-wise at the tip to improve aerodynamics and mechanical properties compared to the conventional propeller. The rather complex geometry of the double blades gives rise to new questions, particularly regarding the aerodynamics. This paper presents a propeller wake energy analysis method which gives a better understanding of the potential performance benefits of the Boxprop and a means to improve its design. CFD analysis of a five bladed Boxprop demonstrated its ability to generate typical levels of cruise thrust at a flight speed of Mach 0.75. The present work shows that the near tip velocity variations in the wake are weaker for this propeller than a conventional one, which is an indication that a counter rotating propeller designed with a Boxprop employed at the front may exhibit lower interaction noise.

Implementation of a solid target production facility

2012 ◽  
Author(s):  
H. J. Tochon-Danguy ◽  
S. S. Poniger ◽  
J. I. Sachinidis ◽  
H. P. Panopoulos ◽  
A. M. Scott
Keyword(s):  
Solid Target ◽  
Production Facility ◽  
Target Production

HT-XRD Analysis of W Thick Coatings for Nuclear Fusion Technology

2014 ◽  
Vol 605 ◽  
pp. 31-34
Author(s):  
Girolamo Costanza ◽  
R. Donnini ◽  
Saulius Kaciulis ◽  
Giorgio Maddaluno ◽  
Roberto Montanari
Keyword(s):  
Nuclear Fusion ◽  
Low Cost ◽  
Deposition Process ◽  
Xrd Analysis ◽  
X Ray Diffraction ◽  
Extended Surfaces ◽  
Thick Coatings ◽  
Thermal Shields ◽  
Soft Interface

W is a promising material to use as protection for thermal shields in future nuclear fusion reactors, however the joining to other metals is really challenging. For realizing such joints plasma spraying (PS) has been used for its simplicity, the possibility to cover complex and extended surfaces and the relatively low cost. An appropriate interlayer must be optimized to increase the adhesion of W on the substrates and to provide a soft interface for better thermo-mechanical compatibility.The present work demonstrates that high-temperature X-ray diffraction (HT-XRD) permits to quickly assess the reliability and quality of the coating-interlayer-substrate system by measuring the strain of coating. This is very useful to orientate the work for optimizing the structure and composition of the interlayer and the parameters of deposition process.

scholarly journals Mechanical Properties and Durability of Recycled Aggregate Permeable Concrete

2021 ◽  
Vol 31 (3) ◽  
pp. 159-167
Author(s):  
Lifang Liu ◽  
Bo Dong
Keyword(s):  
Mechanical Properties ◽  
Target Material ◽  
Orthogonal Test ◽  
Recycled Aggregate ◽  
Analysis Method ◽  
Range Analysis ◽  
The Sustainable Development ◽  
Island Effect ◽  
Water Permeability Coefficient ◽  
Urban Heat

The recycled aggregate permeable concrete made of reused construction wastes is very important for realizing the sustainable development of the construction industry, it can alleviate the adverse impact of surface runoff during storm and the urban heat island effect. Therefore, this paper studied the mechanical properties and durability of recycled aggregate permeable concrete. At first, a few properties of the target material, including bulk density, moisture content, water absorption, compressive strength, and water permeability coefficient, were tested respectively. Then, based on the orthogonal test, the performance of the target material was analyzed, and the analysis steps of the range analysis method and the variance analysis method in the orthogonal test were given. At last, the mechanical properties and durability of the target material were tested via experiments, and the relevant test results and analysis were elaborated.

Pulsed Laser Deposition of Thin-Film Coatings in an Electrostatic Field

2021 ◽  
Vol 410 ◽  
pp. 753-757
Author(s):  
Ruslan V. Chkalov ◽  
Darya G. Chkalova
Keyword(s):  
Electrostatic Field ◽  
Substrate Surface ◽  
Pulsed Laser ◽  
Target Material ◽  
Deposition Process ◽  
Laser Evaporation ◽  
Treatment Area ◽  
Coating Deposition ◽  
Thin Film Coatings ◽  
Phase And Chemical Composition

The work is devoted to the problem of thin metal coatings deposition on dielectric substrates using the method of target material pulsed laser evaporation. The main advantage of laser ablation over other methods of coating deposition is the possibility of using practically any material as a target, while the resulting films are characterized by a high correspondence of the phase and chemical composition to the target material. The possibility of using an electrostatic field to improve the efficiency of coating deposition process is considered. Under the action of an electric field formed between the plates of high-voltage electrodes, the ablation products leave the treatment area and settle on the substrate surface. Examples of coatings deposited under various ablation conditions are shown.

Low Temperature Growth of Oriented Gallium Nitride using Pulsed Laser Deposition

1995 ◽  
Vol 395 ◽  
Author(s):  
Robert Leuchtner ◽  
W. Brock ◽  
Y. Li ◽  
L. Hristakos
Keyword(s):  
Pulsed Laser Deposition ◽  
Film Growth ◽  
Ambient Pressure ◽  
Pulsed Laser ◽  
Target Material ◽  
Deposition Process ◽  
Film Deposition ◽  
Laser Deposition ◽  
Metal Target ◽  
X Ray

ABSTRACTOriented GaN has been successfully grown at low substrate temperatures (∼480°C) on a- and r-planes of sapphire, using the pulsed laser deposition process. We have examined the effects of several deposition parameters on film growth, including substrate temperature (∼50–500°C), ambient pressure (1×10−3 – 10 torr of NH3), and target material (Ga or GaN). The film deposition rate was typically ∼3–4 μm/hr. Film characterization was performed using x-ray diffraction (XRD), optical microscopy, x-ray photoelectron spectrometry (XPS), and atomic force microscopy (AFM). In the case of the Ga metal target, a plasma (∼500V) between the target and substrate was necessary to promote formation of the GaN phase. The ammonia ambient enhanced the nitrogen content in the films compared to vacuum deposition. In general, the GaN target yielded better quality films (smaller rocking curve widths and smoother film morphology) compared to the Ga metal target. These results suggest that pulsed laser deposition is a promising approach to fabricating high quality films of this potentially important semiconducting material.

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