High Power RF Conditioning of the ESS RFQ

Olivier Piquet (1) , Matthieu Baudrier (1) , Anne-Catherine Chauveau (1) , Michel Desmons (1) , Pierrick Hamel (1) , Bryan Jones , Daniel Noll , Alejandro Sosa , Emmanouil Trachanas , Rihua Zeng

1 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers

The 352.21 MHz Radio Frequency Quadrupole (RFQ) for the European Spallation Source ERIC (ESS) has been delivered by the end of 2019 by CEA/IRFU. The RFQ is designed to accelerate a 70 mA proton beam from 75 keV up to 3.62 MeV. It consists of a 4-vane resonant cavity with a total length of 4.6 m. Two coaxial power loop couplers feed the RFQ with the 1.4 MW of RF power required for beam operation. This paper first presents the main systems required for the RFQ conditioning. Then it summarizes the main steps and results of this high power RF conditioning completed at ESS from June 9 to July 29, 2021 in order to achieve the nominal field for a pulse length of 3.2ms at the repetition rate of 14Hz.

Mots clés: rfq; cavity; vacuum; operation; interlocks

Domaines: Physique des accélérateurs [physics.acc-ph]

Olivier Piquet, Matthieu Baudrier, Anne-Catherine Chauveau, Michel Desmons, Pierrick Hamel, et al.. High Power RF Conditioning of the ESS RFQ. 13th International Particle Accelerator Conference, Jun 2022, Muangthong Thani, Thailand. pp.TUPOTK003, ⟨10.18429/JACoW-IPAC2022-TUPOTK003⟩. ⟨hal-03766820⟩