Journal ArticleDOI
Cavitation damage experiments for mercury spallation targets at the LANSCE – WNR in 2008
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TLDR
In this paper, the impact of short pulse mercury spallation targets on short pulse proton beam experiments was investigated at LANSCE -WNR in July of 2008, where damage dependence on mercury velocity using geometry more prototypic to the SNS target than previously employed was investigated.About:
This article is published in Journal of Nuclear Materials.The article was published on 2008-06-30. It has received 29 citations till now. The article focuses on the topics: Spallation & Laser Doppler vibrometer.read more
Citations
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Journal ArticleDOI
Multibubble cavitation inception
TL;DR: Using a multibubble model based on the Rayleigh-plesset equation with an acoustic interaction term, the authors confirmed that the recently reported suppression of cavitation inception due to the interaction of non-identical bubbles can take place not only in liquid mercury but also in water, and found that a relatively large bubble can significantly decrease the cavitation threshold pressure of a nearby small bubble.
Journal ArticleDOI
Multibubble cavitation inception
TL;DR: Using a multibubble model based on the Rayleigh-Plesset equation with an acoustic interaction term, the authors in this paper confirmed that the recently reported suppression of cavitation inception due to the interaction of non-identical bubbles can take place not only in liquid mercury but also in water and found that a relatively large bubble can significantly decrease the cavitation threshold pressure of a nearby small bubble.
Journal ArticleDOI
Acoustic attenuation, phase and group velocities in liquid-filled pipes II: Simulation for spallation neutron sources and planetary exploration
TL;DR: A finite element method is used to compare predictions of the attenuation and sound speeds of acoustic modes in a fluid-filled pipe with those of the analytical model presented in the first paper in this series, showing that strong coupling between the fluid and the solid walls means that erroneous interpretations are made of the data.
Journal ArticleDOI
Status of R&D on mitigating the effects of pressure waves for the Spallation Neutron Source mercury target
TL;DR: In this article, the first SNS target was removed from service in mid 2009 and samples were cut from two locations at the target's beam entrance window and through-wall damage was observed at the innermost mercury vessel wall (not a containment wall).
Journal ArticleDOI
Estimation of aggressive intensity of a cavitating jet with multiple experimental methods
TL;DR: In this article, an experimental study on the cavitating jet was conducted with emphasis placed on the detection of the energy that is emitted by the collapse of cavitation bubble, and four experimental methods, each respectively utilizing a hydrophone, an acoustic emission (AE) sensor, a laser Doppler vibrometer, and a polyvinylidene fluoride (PVDF) sensor were compared.
References
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Journal ArticleDOI
Summary of cavitation erosion investigations for the SNS mercury target
TL;DR: In this article, it was shown that the spallation neutron source mercury target will last at least two weeks at a time-averaged proton beam power level of 1 MW.
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Overview of the Spallation Neutron Source (SNS) with emphasis on target systems
TL;DR: The status of the Spallation Neutron Source (SNS) is discussed in this article, with a more detailed overview of the Target Systems' part of the SNS with emphasis given to the technology issues that present the greatest scientific challenges.
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SNS target tests at the LANSCE-WNR in 2001 – Part I ☆
TL;DR: The first test campaign was to investigate if target vessel cavitation damage could occur under transient pressure conditions much like the Spallation Neutron Source (SNS) target.
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Cavitation damage prediction for spallation target vessels by assessment of acoustic vibration
Masatoshi Futakawa,Hiroyuki Kogawa,Shoichi Hasegawa,Yujiro Ikeda,Bernie Riemer,Mark W Wendel,J.R. Haines,Guenter Bauer,Takashi Naoe,Kohei Okita,Akiko Fujiwara,Yoichiro Matsumoto,Nobuatsu Tanaka +12 more
TL;DR: In this paper, the authors defined the damage potential based on the relationship between the pitting damage and the time-integrated acoustic vibration induced by impact due to the bubble collapses, and measured in on-beam tests carried out by using the proton beam at WNR (Weapons Neutron Research) facility in Los Alamos NEutron Science Center (LANSCE).
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Benchmarking dynamic strain predictions of pulsed mercury spallation target vessels
TL;DR: A robust simulation method for predicting the strain response of the target vessel is needed to evaluate the target's fatigue life as mentioned in this paper, and the importance of benchmarking simulations had been recognized by SNS and its R&D program included experiments for measuring strains in various mercury-filled targets responding to singlebeam pulses.