TY - GEN
T1 - Automatic tuner unit operation for the microwave system of the ess-bilbao h+ ionsource
AU - Muguira, L.
AU - Arredondo, I.
AU - Belver, D.
AU - Eguiraun, M.
AU - Fernandez, F. J.
AU - Feuchtwanger, J.
AU - Garmendia, N.
AU - Gonzalez, O.
AU - Gonzalez, P. J.
AU - Verdu, J.
AU - Etxebarria, V.
AU - Jugo, J.
AU - Portilla, J.
PY - 2012
Y1 - 2012
N2 - The operation of the waveguide Automatic Tuner Unit (ATU) for optimizing both theimpedance matching and the RF power coupling in the ESS-Bilbao H+ Ion Source (ISHP) ispresented. Since the plasma chamber can be con- sidered as a time varying load impedancefor the pulsed RF 2.7 GHz high power generator, several approaches have been studied foraccurately measuring the load impedance. In the later case, a set of power detectorsconnected to elec- tric field probes, IQ demodulators and gain/phase detec- tors connectedto dual directional couplers have been inte- grated. An experimental comparison of theseapproaches is presented, showing their accuracy, limitations and error correction methods.Finally, the control system developed for the automatic operation of the triple capacitivepost tuner is described, as well as illustrative results.
AB - The operation of the waveguide Automatic Tuner Unit (ATU) for optimizing both theimpedance matching and the RF power coupling in the ESS-Bilbao H+ Ion Source (ISHP) ispresented. Since the plasma chamber can be con- sidered as a time varying load impedancefor the pulsed RF 2.7 GHz high power generator, several approaches have been studied foraccurately measuring the load impedance. In the later case, a set of power detectorsconnected to elec- tric field probes, IQ demodulators and gain/phase detec- tors connectedto dual directional couplers have been inte- grated. An experimental comparison of theseapproaches is presented, showing their accuracy, limitations and error correction methods.Finally, the control system developed for the automatic operation of the triple capacitivepost tuner is described, as well as illustrative results.
UR - https://www.scopus.com/pages/publications/84885578205
M3 - Other contribution
AN - SCOPUS:84885578205
SN - 9783954501151
T3 - IPAC 2012 - International Particle Accelerator Conference 2012
ER -