JACoW is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.
TY - UNPB AU - He, Y. ED - Saito, Kenji ED - Xu, Ting ED - Sakamoto, Naruhiko ED - Lesage, Ana ED - Schaa, Volker R.W. TI - Progress and Operation Experience at CAFe J2 - Proc. of SRF2021, East Lansing, MI, USA, 28 June-02 July 2021 CY - East Lansing, MI, USA T2 - International Conference on RF Superconductivity T3 - 20 LA - english AB - The CW superconducting linac CAFe (China ADS Front-end demo facility) at IMP was designed for 25 MeV protons aiming at the front-end demonstration of China ADS project in 2011 and constructed in 2017. Since then, the major upgradings have been made to accelerate the particles with A/q=2. It consists an RFQ for alphas, three cryomodules with 6 HWRs of beta 0.1 and one cryomudule with 5 taper-type HWRs of beta 0.15. It can accelerate protons to 20 MeV and alphas to 40 MeV. It took more than 3 years to improve the hardware and software to go after a higher beam power and higher availability during operation according to the lessens learned from several commissioning campaigns. At beginning of 2021, it achieved 10 mA and 205 kW continuous wave (CW) proton beam successfully. The beam availability remains 93%~96% during operation test in 12 hours at 174kW/10mA and in 10⁸ hour at 126kW/7.3mA. This talk will report the progress of the CAFe with describing the operation experience and lessons learned including cavities, cryogenics, LLRF. The recent Nb/Cu cavity development at IMP will be also reported as an R&D topic for the future ADS. PB - JACoW Publishing CP - Geneva, Switzerland ER -