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Atomistic mechanisms of rf breakdown in high-gradient linacs
Atomistic mechanisms of rf breakdown in high-gradient linacs ... coefficients are the atomistic characteristics of the plasma ion interaction with the surface,.
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New mechanism of cluster-field evaporation in rf breakdown
Dec 22, 2004 ... New mechanism of cluster-field evaporation in rf breakdown ... evolution in a high electric field gradient typical for linacs, we have studied a new mechanism for rf- field .... To atomistically simulate field evaporation, we have.
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TuP51 - Cornell University
Jul 15, 2005 ... Cluster Field Evaporation Mechanism of RF vacuum breakdown. Metal Tip Field Evaporation Model. New Mechanism of RF-breakdown in Linacs ... •One of the most possible mechanisms at electric field gradients as high as 10 GV/m is ... • Atomistic simulation model of the vacuum RF- breakdown has been ...
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Molecular - The Accelerator Laboratory at University of Helsinki
Jan 22, 2015 ... To achieve these energies, very high accelerating gradients over 100 MV m. −1 are ...... [21] Insepov Z, Norem J and Veitzer S 2010 Atomistic self-sputtering mechanisms of rf breakdown in high-gradient linacs Nucl. Instrum.
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TUP51
cluster ion irradiation was studied based on atomistic and mesoscopic ... of future TeV linear accelerators and muon-muon colliders. ... (“cold”) cavities and one of the possible mechanisms at high electric field ... In this case, the high-voltage surface rf-breakdown will still be a ... evaporation in a high-gradient rf-field. However ...
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V - Indico
Z. Insepov, J. Norem, S. Veitzer, Atomistic self-sputtering mechanisms of rf breakdown in high-gradient linacs, Nuclear Instruments and Methods in Physics  ...
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Comparative study of experimental signals for multipactor and
May 14, 2012 ... and high-gradient accelerating structures in particle accelerators. ... therapy linacs are being proposed with surface gradients as high as for the ... among all of the applications is that RF breakdown thresholds give one of the ..... complex is the mechanism for RF breakdowns, which is a true multi physics ...
[ CERN-OPEN-2012-008.pdf - Read/Download File

High-Gradient RF Development and Applications - LAL
Nov 3, 2015 ... High-gradient development has also involved a fundamental study of gradient limitations, ... 9. Electron Linac RF Unit Layout ..... Number of pulses before breakdown. P ro b a b ility d ... Re-heat of conditioned cathodes to determine mechanism of conditioning. ... Atomistic simulations – University of Helsinki ...
[ CLIC_Xband_development_final.pdf - Read/Download File

XII. Acronyms and Abbreviations - Hydrogen and Fuel Cells Program
Atomistic and thermodynamic modeling. ATP .... Cost-effective High-efficiency Advanced .... Generalized gradient approximation ..... via the Grotthuss shuttling mechanism ..... Stanford Linear Accelerator Center ... RF, rf. Radio frequency. RF. Roughness factor. RFP. Request for proposals. RGA .... Work breakdown schedule.
[ xii_acronyms_and_abbreviations.pdf - Read/Download File

Fiscal Year 2011 Award Abstracts - Office of Science - Department of
learning the mechanisms that determine the atomic ordering at their edges. .... heat and defects to pass through the atomistic-continuum interface. ... This research was selected for funding by the Office of High Energy Physics (HEP). .... Range Beam Diagnostics and Beam Dynamics Studies for HIgh Current Electron LINACs.
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PDF (1571K) - Annual Reviews
Jan 9, 2014 ... biological systems, femtosecond electron diffraction, high-brightness ... are faced with memorizing a large number of standard reaction mechanisms to develop skills ... are extremely strong curvatures or gradients in the potential energy surface .... excited and ground state surfaces that a breakdown in the ...
[ annurev-physchem-040412-110117 - Read/Download File

Project List Report in Excel - Department of Energy
P/ANL2010-196. Atomistically-Informed Mesoscale Simulation of Gradient .... High-Power RF Dampers for Superconducting RF Deflecting. Cavities. $324,800.
[ ProjectList-Final-FY2012_0.pdf - Read/Download File

Accelerator Science and Technology in Europe EuCARD 2012
validation for gradient flatness procedure; low-level RF and regulation. General ... The studies are on high precision assembly and breakdown studies, HOM.
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Download full text pdf - De Gruyter
validation for gradient flatness procedure; low-level RF and regulation. General ... The studies are on high precision assembly and breakdown studies, HOM.
[ $002fj$002feletel.2012.58.issue-4$002fv10177-012-0045-z$002fv10177-012-0045-z.pdf?t:ac=j$002feletel.2012.58.issue-4$002fv10177-012-0045-z$002fv10177-012-0045-z.xml - Read/Download File

Show text (PDF) - Elpub Wuppertal - Bergische Universität Wuppertal
Nov 2, 2007 ... superconducting radio-frequency cavities for linear accelerators. Electron field ... Breakdown conditioning. 22. 2.3.3. ... Proportional-Integral-Derivative r. Radius. RF. Radio Frequency. RIA ... Many mechanisms have been ... [11] For such high accelerating gradients the cavity surface must be capable to ...
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Accelerator Science and Technology in Europe EuCARD 2012
validation for gradient flatness procedure; low-level RF and regulation. General ... The studies are on high precision assembly and breakdown studies, HOM.
[ 05_Accelerator_Science_and_Technology_in_Europe_Euc.pdf - Read/Download File

The Water Surface: Complex, Dynamic and Wet
Joule heating hot spot at high latitudes in the afternoon sector. 39 .... Formation Mechanism of Iron Nanocubes in Magnetron Sput- .... Laser induced breakdown spectroscopy studies of fuel re- .... Hybrid perovskite photovoltaic materials under the atomistic ... enhanced atomic layer deposition with rf capacitive discharges .
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99 LDRD Annual Report - Sandia National Laboratories
(i.e., high-performance modeling and simulation tools) capture ... Linking Atomistic Computations with Phase- ... Critical Copper-Corrosion Mechanisms. 37 .... Toxins by RF Power. 343 Intense ..... Neutron generators (NGs) are linear accelerators composed ..... configurational entropy can be utilized to compute the gradient.
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Download - Paul Scherrer Institut
May 27, 2009 ... energies (and costly, long linear accelerators) for short lasing wavelengths. ... through a high-voltage and high-gradient diode configuration, before entering the first RF accelerating structure. A newly- ... gradients without breakdown. Since this ...... Similar trapping mechanisms are expected for all molecules.
[ PSI_ScientificReport_2008.pdf - Read/Download File

Annual Report 2008 - Helsinki Institute of Physics
The High Energy Physics Programme continued its projects for detector construc- ... the theory project on microscopic simulation of surface RF breakdown .... onset of sparking in compact linear accelerator components. .... Thus more involved mechanisms, such as tachy- ..... with a sufficiently high accelerating gradient.
[ HIP-Annual-Report-2008.pdf - Read/Download File

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