Robert Mirowski

CHARACTERIZATION OF ARC-PVD NICKEL COATINGS USED FOR VACUUM BRAZING OF JOINTS IN ACCELERATING STRUCTURES

S. Romaniuk, Katarzyna Nowakowska‐Langier, Robert Mirowski, M. Kuk et autres

In this research, the structure and properties of multilayered nickel coatings obtained by vacuum-arc deposition (ArcPVD) have been investigated. The influence of Ni layered coatings after being brazed using silver-based brazing solder on vacuum joints has been determined. The Ni coatings are …

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Metallic Coatings in the Diagnosis of Run‐Away Electrons in Magnetic Confinement Fusion Facilities

Katarzyna Nowakowska‐Langier, M. Kuk, R. Kwiatkowski, A. Malinowska et autres

Abstract The article presents the application of a low‐temperature plasma technique accomplished by controlled arc discharges in ultra‐high vacuum deposition of metallic coatings on ceramic substrates. Such metallic coatings are very important in the diagnostic devices within the magnetic confinement fusion facilities, …

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Multi-component low and high entropy metallic coatings synthesized by pulsed magnetron sputtering

Grzegorz Witold Strzelecki, Katarzyna Nowakowska‐Langier, K. Mulewska, Maciej Zieliński et autres

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Coating in ultra-high vacuum cathodic-arc and processing of Pb films on Nb substrate as steps in preparation of Nb-Pb photocathodes for radio-frequency, superconducting e− guns

J. Lorkiewicz, R. Nietubyć, R. Diduszko, J. Sekutowicz et autres

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Influence of generation control of the magnetron plasma on structure and properties of copper nitride layers

Katarzyna Nowakowska‐Langier, Łukasz Skowroński, Rafał Choduń, Sebastian Okrasa et autres

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Studies of runaway electrons via Cherenkov effect in tokamaks

Jarosław Żebrowski, Lech Jakubowski, M. Rabiński, Marek Jan Sadowski et autres

The paper concerns measurements of runaway electrons (REs) which are generated during discharges in tokamaks. The control of REs is an important task in experimental studies within the ITER-physics program. The NCBJ team proposed to study REs by means of Cherenkov-type detectors …

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Development of a Cherenkov-type diagnostic system to study runaway electrons within the COMPASS tokamak

M. Rabiński, Lech Jakubowski, Karol Malinowski, Marek Jan Sadowski et autres

Development of a Cherenkov-type diagnostic system to study runaway electrons within the COMPASS tokamak, Rabinski, M., Jakubowski, L., Malinowski, K., Sadowski, M.J., Zebrowski, J., Jakubowski, M.J., Mirowski, R., Weinzettl, V., Ficker, O., Mlynar, J., Panek, R., Paprok, R., Vlainic, M.

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Signal acquisition in Cherenkov-type diagnostics of electron beams within tokamak facilities

M. Rabiński, Lech Jakubowski, Marek Jan Sadowski, Jarosław Żebrowski et autres

The paper presents feasibility and design studies of Cherenkov-type probes, a development of the measuring head construction designed for different tokamak devices, and in particular the acquisition of optical signals to a data storage system. In order to lower the energy threshold …

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Review and present status of preparation of thin layer lead photocathodes for e-injectors of superconducting RF linacs

J. Lorkiewicz, R. Nietubyć, J. Sekutowicz, Marek Barlak et autres

Results are reported on using evaporation and UHV arc lead deposition to create thin-layer superconducting Pb photocathodes on niobium wall of electron gun. Evaporated photocathodes were prepared and tested for the first time in 2014. A complete XFEL-type photo-injector with an evaporated …

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Development Of The Cherenkov-Type Diagnostic System To Study Runaway Electrons Within Tokamaks

Lech Jakubowski, Karol Malinowski, Robert Mirowski, M. Rabiński et autres

Measurements of fast electrons produced in plasma a nd escaping from tokamak-type facilities are of particular interest for diagnostics, because such electrons deliver information about processes occurring inside bulk plasma. A team from the National Centre for Nuclear Research (NCBJ, former IPJ) …

Cherenkov-type diagnostics of fast electrons within tokamak plasmas

Lech Jakubowski, Marek Jan Sadowski, Jarosław Żebrowski, Karol Malinowski et autres

This paper presents a summary of the most important results of fast electron measurements performed so far within different tokamaks by means of Cherenkov-type detectors. In the ISTTOK tokamak (IPFN, IST, Lisboa, Portugal), two measuring heads were applied, each equipped with four …

Deposition and optimization of thin lead layers for superconducting accelerator photocathodes

J. Lorkiewicz, R. Nietubyć, Marek Barlak, Robert Mirowski et autres

A combination of a ultra high vacuum arc deposition system and a recrystallization method was used to optimize the smoothness and thickness of thin-layer lead cathodes for superconducting niobium electron injectors. A non-filtered arc system was chosen to deposit Pb films on …

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