700 MHZ SUPERCONDUCTING PROTON CAVITIES DEVELOPMENT AND FIRST TESTS IN THE HORIZONTAL CRYOSTAT "CRYHOLAB"

High intensity proton accelerators based on Superconducting RF Cavities (SCRF) are considered for various applications such as nuclear waste transmutation, radioactive ion beams, neutrons sources or neutrino factories. A collaboration between the CEA-Saclay and the IPN-Orsay groups involved in SCRF activities is working on the 700 MHz elliptical cavities for the high energy part of the linac. The goal is to design, manufacture and test a cryomodule with two beta 0.65 five cells cavities and their associated components (helium tank, cold tuner, coupler...). Monocell cavities have been fabricated and tested to validate the design, and the first five cell cavity (beta = 0.65) fabrication is almost achieved. This paper presents the technological choices for the cavity design, the cavity tests in vertical cryostat and also the first cryogenic tests in the horizontal test stand "CryHoLab" for the installation validation.