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Local power coupling as a predictor of high-gradient breakdown performance / Paszkiewicz, Jan (CERN) ; Grudiev, Alexej (CERN) ; Wuensch, Walter (CERN)
A novel quantity for predicting the high-gradient performance of radio frequency accelerating structures is presented. [...]
arXiv:2209.15291. - 16 p.
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High-Power Test of Two Prototype X-Band Accelerating Structures Based on SwissFEL Fabrication Technology / Millar, William L (CERN) ; Grudiev, Alexej (CERN) ; Wuensch, Walter (CERN) ; Lasheras, Nuria Catalan (CERN) ; McMonagle, Gerard (CERN) ; Zennaro, Riccardo (PSI, Villigen) ; Craievich, Paolo (PSI, Villigen) ; Bopp, Markus (PSI, Villigen) ; Lucas, Thomas G (PSI, Villigen) ; Volpi, Matteo (CERN ; Melbourne U.) et al.
This article presents the design, construction, and high-power test of two X -band radio frequency (RF) accelerating structures built as part of a collaboration between CERN and the Paul Scherrer Institute (PSI) for the compact linear collider (CLIC) study. The structures are a modified “tuning-free” variant of an existing CERN design and were assembled using Swiss free electron laser (SwissFEL) production methods. [...]
2023 - 19 p. - Published in : IEEE Trans. Nucl. Sci. 70 (2023) 1-19 Fulltext: PDF;

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Identifying critical plastic activity in electrodes under intense electric fields and the link to breakdown nucleation / Ashkenazy, Yinon (Hebrew U.) ; Popov, Inna (Hebrew U.) ; Yashar, Ayelet (Hebrew U.) ; Gad, Raanan (Hebrew U.) ; Profatilova, Iaroslava (CERN) ; Paszkiewicz, Jan (CERN) ; Peacock, Ruth (CERN) ; Wuensch, Walter (CERN)
The hypothesis that arc nucleation is related to plastic activity due to collective motion of dislocation in the cathode is examined via experiments and theoretical efforts over the last few years. Current theoretical and experimental observations indicating specific dislocation activity related to the applied high field are reviewed. [...]
2021 - 2 p. - Published in : 10.1109/ISDEIV46977.2021.9586897
In : 29th International Symposium on Discharges and Electrical Insulation in Vacuum, Online, 26 - 30 Sep 2021, pp.1-2

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Statistical Analysis of Field-Emission Currents / Lachmann, Sagy (Hebrew U.) ; Jacewicz, Marek (Uppsala U.) ; Profatilova, Iaroslava (CERN) ; Paszkiewicz, Jan (CERN) ; Wuensch, Walter (CERN) ; Ashkenazy, Yinon (Hebrew U.)
The current due to cold tunneling of electrons from a metallic surface exposed to high electric fields, regularly named “dark current,” is commonly described in modern literature using an analytical approximate solution provided by Murphy and Good [Phys. Rev. [...]
2021 - 11 p. - Published in : Phys. Rev. Applied 16 (2021) 024007 Fulltext: PDF;

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Dark current spikes as an indicator of mobile dislocation dynamics under intense dc electric fields / Engelberg, Eliyahu Zvi (Hebrew U.) ; Paszkiewicz, Jan (CERN) ; Peacock, Ruth (CERN) ; Lachmann, Sagy (Hebrew U.) ; Ashkenazy, Yinon (Hebrew U.) ; Wuensch, Walter (CERN)
Breakdown of metals subject to intense electric fields is a long-standing limiting factor in high-voltage applications. The mechanism leading to breakdown nucleation is not completely understood. [...]
2020 - 9 p. - Published in : Phys. Rev. Accel. Beams 23 (2020) 123501 Fulltext: PDF;

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Studies of Breakdown and Pre-Breakdown Phenomena in High Gradient Accelerating Structures / Paszkiewicz, Jan
Vacuum breakdown is a complex process and an important limiting factor of the performance of normal-conducting high-gradient particle accelerators, and can result in loss of luminosity in particle collider applications, as well as damage to accelerating structures [...]
CERN-THESIS-2020-260 - 237 p.

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Classification of vacuum arc breakdowns in a pulsed DC system / Saressalo, Anton (Helsinki Inst. of Phys. ; Helsinki U.) ; Profatilova, Iaroslava (CERN) ; Kyritsakis, Andreas (Helsinki Inst. of Phys. ; Helsinki U.) ; Paszkiewicz, Jan (CERN) ; Calatroni, Sergio (CERN) ; Wuensch, Walter (CERN) ; Djurabekova, Flyura (Helsinki Inst. of Phys. ; Helsinki U.)
Understanding the microscopic phenomena behind vacuum arc ignition and generation is crucial for being able to control the breakdown rate, thus improving the effectiveness of many high-voltage applications where frequent breakdowns limit the operation. In this work, statistical properties of various aspects of breakdown, such as the number of pulses between breakdowns, breakdown locations and crater sizes are studied independently with almost identical Pulsed DC Systems at the University of Helsinki and in CERN. [...]
arXiv:1911.05192.- 2020-02-12 - 11 p. - Published in : Phys. Rev. Accel. Beams.: 23 (2020) , pp. 023101
- Published in : Phys. Rev. Accel. Beams: 23 (2020) , pp. 023101 Fulltext: PDF; Fulltext from Publisher: PDF;

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Localization of vacuum breakdown locations in RF structures using S-parameter data / WU, Chien Hung (the University of Oxford (GB)) ; Paszkiewicz, Jan (University of Oxford (GB))
This project is an investigation to ﬁnd the breakdown locations using a new method involving group delays of the Scattering parameters (or S-parameters). [...]
CERN-ACC-2020-0006 ; CLIC-Note-1157. - 2019 - 13.
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Spatially resolved dark current in high gradient traveling wave structures / Paszkiewicz, Jan (CERN ; JAI, UK ; Oxford U.) ; Burrows, Philip (JAI, UK ; Oxford U. ; CERN) ; Wuensch, Walter (CERN)
High-gradient accelerating structures are known to produce field-emitted current from regions of high surface field, which are captured and accelerated by the fields within the structure. This current is routinely measured in structures under test in the CLIC (Compact Linear Collider) high-gradient test stands using Faraday cups. [...]
CERN-ACC-2019-211; CLIC-Note-1191.- 2019 - 4 p. - Published in : 10.18429/JACoW-IPAC2019-WEPRB062 Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.WEPRB062

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10.

Dark current analysis at CERN’s X-band facility / Banon Caballero, David (Valencia U., IFIC ; CERN) ; Boronat, Marça (Valencia U., IFIC ; CERN) ; Catalán Lasheras, Nuria (CERN) ; Faus-Golfe, Angeles (Orsay, LAL) ; Gimeno, Benito (Valencia U., IFIC) ; Lucas, Thomas (Melbourne U. ; CERN) ; Millar, William (Lancaster U. ; CERN) ; Paszkiewicz, Jan (U. Oxford (main) ; CERN) ; Pitman, Sam (CERN) ; Sánchez, Victoria (Valencia U., IFIC ; CERN) et al.
Dark current is particularly relevant during operation in high-gradient linear accelerators. Resulting from the capture of field emitted electrons, dark current produces additional radiation that needs to be accounted for in experiments. [...]
CERN-ACC-2019-212; CERN-ACC-2019-270; CLIC-Note-1190.- 2019 - 4 p. - Published in : 10.18429/JACoW-IPAC2019-WEPRB059 Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.WEPRB059

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Vedi anche: autori con nomi simili
1	Paszkiewicz, J
1	Paszkiewicz, J.

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