1. The new hyperon beam experiment at CERN

1989 ◽  
Author(s):  
S. Paul
Keyword(s):  
Beam Experiment

scholarly journals The electromagnetic calorimeter in the hyperon beam experiment at CERN

1992 ◽  
Vol 313 (3) ◽  
pp. 345-356 ◽  
Author(s):  
W. Brückner ◽  
E. Chudakov ◽  
R. Edelhoff ◽  
S. Gerassimov ◽  
Th. Kallakowsky ◽  
...  
Keyword(s):  
Electromagnetic Calorimeter ◽  
Beam Experiment

Experiments and Simulations With Large Gas Bubbles in Mercury Towards Establishing a Gas Layer to Mitigate Cavitation Damage

2006 ◽  
Author(s):  
Mark Wendel ◽  
David Felde ◽  
Thomas Karnowski ◽  
Bernard Riemer ◽  
Arthur Ruggles
Keyword(s):  
Liquid Metal ◽  
Solid Wall ◽  
National Laboratory ◽  
Large Bubble ◽  
Cavitation Damage ◽  
Oak Ridge ◽  
Beam Experiment ◽  
Order Of Magnitude ◽  
Protective Gas ◽  
Gas Layer

One option that shows promise for protecting solid surfaces from cavitation damage in liquid metal spallation targets involves introducing an interstitial gas layer between the liquid metal and the containment vessel wall. Several approaches toward establishing such a protective gas layer are being investigated at the Oak Ridge National Laboratory including large bubble injection and methods that involve stabilization of the layer by surface modifications to enhance gas hold-up on the wall or by inserting a porous media. It has previously been reported that using a gas layer configuration in a test target showed an order-of-magnitude decrease in damage for an in-beam experiment. Video images that were taken of the successful gas/mercury flow configuration have been analyzed and correlated. The results show that the success was obtained under conditions where only 60% of the solid wall was covered with gas. Such a result implies that this mitigation scheme may have much more potential. Additional experiments with gas injection into water are underway. Multi-component flow simulations are also being used to provide direction for these new experiments. These simulations have been used to size the gas layer and position multiple inlet nozzles.

Pyruvic acid proton and hydrogen transfer reactions in clusters

2019 ◽  
Vol 21 (16) ◽  
pp. 8221-8227 ◽  
Author(s):  
Kateryna Grygoryeva ◽  
Milan Ončák ◽  
Andriy Pysanenko ◽  
Michal Fárník
Keyword(s):  
Pyruvic Acid ◽  
Molecular Beam ◽  
Hydrogen Transfer ◽  
Transfer Reactions ◽  
Ion Chemistry ◽  
Acid Proton ◽  
Beam Experiment ◽  
Hydrogen Transfer Reactions

We investigate ion chemistry in pyruvic acid (PA) clusters in a molecular beam experiment.

scholarly journals Cantilever Beam Experiment

2020 ◽  
Author(s):  
Gloria Ma ◽  
Siben Dasgupta ◽  
Anthony Duva
Keyword(s):  
Cantilever Beam ◽  
Beam Experiment

scholarly journals Structural Low-Level Dynamic Response Analysis Using Deviations of Idealized Edge Profiles and Video Acceleration Magnification

2019 ◽  
Vol 9 (4) ◽  
pp. 712
Author(s):  
Dashan Zhang ◽  
Liangfei Fang ◽  
Ye Wei ◽  
Jie Guo ◽  
Bo Tian
Keyword(s):  
High Frequency ◽  
Vibration Characteristics ◽  
Response Analysis ◽  
Test Beam ◽  
Structural Dynamic ◽  
Vibration Signals ◽  
High Frequency Vibration ◽  
Low Level ◽  
Beam Experiment ◽  
Noise Barrier

The development of high-speed camera systems and image processing techniques has promoted the use of vision-based methods as a practical alternative for the analysis of non-contact structural dynamic responses. In this study, a deviation extraction method is introduced to obtain deviation signals from structural idealized edge profiles. Given that the deviation temporal variations can reflect the structural vibration characteristics, a method based on singular-value decomposition (SVD) is proposed to extract valuable vibration signals from the matrix composed of deviations from all video frames. However, this method exhibits limitations when handling low-level motions that reflect high-frequency vibration components. Hence, a video acceleration magnification algorithm is employed to enhance low-level deviation variations before the extraction. The enhancement of low-level deviation variations is validated by a light-weight cantilever beam experiment and a noise barrier field test. From the extracted waveforms and their spectrums from the original and magnified videos, subtle deviations of the selected straight-line edge profiles are magnified in the reconstructed videos, and low-level high-frequency vibration signals are successfully enhanced in the final extraction results. Vibration characteristics of the test beam and the noise barrier are then analyzed using signals obtained by the proposed method.

Controller Design of a Distributed Slewing Flexible Structure—A Frequency Domain Approach

1997 ◽  
Vol 119 (4) ◽  
pp. 809-814 ◽  
Author(s):  
S. M. Yang ◽  
J. A. Jeng ◽  
Y. C. Liu
Keyword(s):  
Frequency Domain ◽  
Transfer Functions ◽  
Controller Design ◽  
System Stability ◽  
Feedback Gain ◽  
Flexible Structure ◽  
Control Law ◽  
Discrete Parameter ◽  
Locus Method ◽  
Beam Experiment

The vibration control of a slewing flexible structure by collocated and noncollocated feedback is presented in this paper. A stability criterion derived from the root locus method in frequency domain is applied to predict the closed-loop system stability of the distributed parameter model whose analytical transfer functions are formulated. It is shown that the control law design requires neither distributed state sensing/estimation nor functional feedback gain; moreover, the spillover problem associated with discrete parameter model can be prevented. Implementation of the noncollocated feedback in a slewing beam experiment validates that the control law is effective in pointing accuracy while suppressing the tip vibration.

Stereochemical effects in the quenching of Na*(3 2P) by CO: Crossed beam experiment and ab initio CI potential energy surfaces

1982 ◽  
Vol 77 (4) ◽  
pp. 1908-1920 ◽  
Author(s):  
Werner Reiland ◽  
Hans‐Ulrich Tittes ◽  
Ingolf V. Hertel ◽  
Vlasta Bonačić‐Koutecký ◽  
Maurizio Persico
Keyword(s):  
Potential Energy ◽  
Ab Initio ◽  
Potential Energy Surfaces ◽  
Beam Experiment ◽  
Energy Surfaces
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