Autor: Grecki, M. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Development and tests of PWM amplifier for driving the piezoelectric elements
Autorzy:: Matiulko, J.
Poźniak, T.
Przygoda, K.
Grecki, M.
Powiązania:: https://bibliotekanauki.pl/articles/397949.pdf
Data publikacji:: 2010
Wydawca:: Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
Tematy:: wzmacniacz PWM (modulacja szerokości impulsu)
piezoelektryczne elementy
PWM (pulse width modulation) amplifier
piezoelectric elements
Opis:: The paper describes the design and research work carried out to prepare the prototype of pulse amplifier. The work was aimed to describe main operational parameters of PWM amplifiers enabling using them to control the piezoelectric actuators used for active compensation of Lorentz force detuning of superconducting cavities.
Źródło:: International Journal of Microelectronics and Computer Science; 2010, 1, 1; 69-72
2080-8755
2353-9607
Pojawia się w:: International Journal of Microelectronics and Computer Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: A novel approach for automatic control of piezoelectric elements used for Lorentz force detuning compensation
Autorzy:: Przygoda, K.
Poźniak, T.
Napieralski, A.
Grecki, M.
Powiązania:: https://bibliotekanauki.pl/articles/397953.pdf
Data publikacji:: 2010
Wydawca:: Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
Tematy:: Lorentz force detuning compensation
piezoelectric actuators
superconducting resonance cavity
Opis:: Linear accelerators such as Free Electron Lasers (FELs) use superconducting (SC) resonant cavities to accelerate electron beam to high energies. TESLA type resonators are extremely sensitive to detuning induced by mechanical deformations - Lorentz force detuning (LFD), mainly due to the extremely high quality factor (Q) of the 1.3 GHz resonance mode, in the range of 10 6. The resulting modulation of a resonance frequency of the cavity makes power consumption and stability performances of the Low-Latency Radio Frequency (LLRF) control more critical. In order to minimize the RF control efforts and desired stabilities, the fast piezoelectric actuators with digital control systems are commonly used. The paper presents a novel approach for automatic control of piezoelectric actuators used for compensation of Lorentz force detuning, the practical application and carried out tests in accelerating module ACC6 in Free-Electron Laser in Hamburg (FLASH).
Źródło:: International Journal of Microelectronics and Computer Science; 2010, 1, 1; 81-84
2080-8755
2353-9607
Pojawia się w:: International Journal of Microelectronics and Computer Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Power supply unit for ATCA-based piezo compensation system
Autorzy:: Przygoda, K.
Poźniak, T.
Makowski, D.
Kozak, T.
Wiśniewski, M.
Napieralski, A.
Grecki, M.
Powiązania:: https://bibliotekanauki.pl/articles/398120.pdf
Data publikacji:: 2010
Wydawca:: Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
Tematy:: jednostka zasilana energią
siła Lorentza
architektura ATCA
piezo compensation
Lorentz force detuning
power supply unit
ATCA architecture
Opis:: Pulsed operation of high gradient superconducting radio frequency (SCRF) cavities results in dynamic Lorentz force detuning (LFD) approaching or exceeding the bandwidth of the cavity of order of hundred of Hz. The resulting modulation of the resonance frequency of the cavity is leading to a perturbation of the amplitude and phase of the accelerating field, which can be controlled only at the expense of RF power |1-3|. The X-Ray Free Electron Laser (X-FEL) accelerator, which is now under development in Deutsches Elektro wen-Synchrotron (DESY), will consists of around 800 cavities with a fast tuner fixture including the actuator / sensor configuration. Therefore, it is necessary to design a distributed control system which could be able to supervise around 25 RF stations, each one comprised of 32 cavities. The Advanced Telecommunications Computing Architecture (ATCA) was chosen to design, develop, and build a Low Level Radio Frequency (LLRF) controller for X-FEL. The already performed tests of ATCA LLRF control system proofed the possibilities of usage of such a standard for high energy physics experiments |4|. The paper presents the concept of integration of the piezo compensation system to the ATCA standards with special emphasis to the hardware part of the system. Moreover, the first results from carried out tests of the prototype power supply unit for piezo drivers integrated to ATCA board will be presented.
Źródło:: International Journal of Microelectronics and Computer Science; 2010, 1, 2; 205-210
2080-8755
2353-9607
Pojawia się w:: International Journal of Microelectronics and Computer Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Evaluation of an ATCA-based LLRF system at FLASH
Autorzy:: Simrock, S.
Butkowski, Ł.
Grecki, M.
Jeżyński, T.
Koprek, W.
Jabłoński, G.
Jałmużna, W.
Makowski, D.
Piotrowski, A.
Sakowicz, B.
Czuba, K.
Powiązania:: https://bibliotekanauki.pl/articles/397843.pdf
Data publikacji:: 2010
Wydawca:: Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
Tematy:: akcelerator
sterowanie
sprzężenie zwrotne
accelerator
control
feedback
Advanced TCA
Opis:: Future RF Control systems will require simultaneous data acquisition of up to 100 fast ADC channels at sampling rates of around 100 MHz and real time signal processing within a few hundred nanoseconds. At the same time the standardization of Low-Level RF systems are common objectives for all laboratories for cost reduction, performance optimization and machine reliability. Also desirable are modularity and scalability of the design as well as compatibility with accelerator instrumentation needs including the control system. All these requirements can be fulfilled with the new telecommunication standard ATCA when adopted to the domain of instrumentation. We describe the architecture and design of an ATCA based LLRF system for the European XFEL. Initial results of the demonstration of such a system at the FLASH user facility will be presented. Presented are the results of operating essential components of a prototype during the machine studies in January and March 2009.
Źródło:: International Journal of Microelectronics and Computer Science; 2010, 1, 1; 48-51
2080-8755
2353-9607
Pojawia się w:: International Journal of Microelectronics and Computer Science
Dostawca treści:: Biblioteka Nauki

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