High Precision Temperature Control for Injector Components of a Free-Electron Laser

Autor:	Sven Pfeiffer, Klaus Flöttmann, Holger Schlarb, Gerwald Lichtenberg, Winfried Decking, Siegfried Schreiber, Olaf Krebs, Kai Kruppa, Frank Brinker
Rok vydání:	2016
Předmět:	Materials science Temperature control law Control theory Nuclear engineering RF power amplifier Free-electron laser Physics::Accelerator Physics PID controller Injector Laser law.invention Electron gun
Zdroj:	Advances in Intelligent Systems and Computing ISBN: 9783319312941 SIMULTECH (Selected Papers)
DOI:	10.1007/978-3-319-31295-8_8
Popis:	High precision temperature control of injector components like the RF GUN is necessary to optimally accelerate thousands of electrons within the injection part of the European X-ray free-electron laser XFEL and the Free Electron Laser FLASH. A difference of the RF GUN temperature from the reference value of only 0.01 K leads to detuning of the cavity and thus limits the performance of the whole facility. Especially in steady-state operation there are some undesired temperature oscillations when using classical standard control techniques like PID control. That is why a model based approach is applied here to design the RF GUN temperature controller for the free-electron lasers. Therefore a nonlinear thermal model of the RF GUN and the cooling facility is derived based on heat balances, considering the heat dissipation of the Low-Level RF power. The derived model is used for a linear model predictive controller design in MATLAB/Simulink. A test of the controller in simulation shows promising results.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2f0bf37b96418c003907cf7f008b0610 https://doi.org/10.1007/978-3-319-31295-8_8 Zobrazit plný text záznamu