Effect of stiffness on vibration of the model of ADS beam window due to impinging jet

Hiratsuka, Sota*; Tobita, Daiki*; Monji, Hideaki*; Yamashita, Susumu   ; Kondo, Nao; Yoshida, Hiroyuki  ; Sugawara, Takanori  

In the ADS, a cooling method is being considered in which coolant is sprayed directly from a nozzle installed in front of the beam window because the beam window becomes hot due to the passage of the proton beam emitted by the accelerator. In this method, an impinging jet is formed around the hemispherical beam window, which induces oscillation of the beam window. Therefore, from a safety point of view, it is very important to understand the oscillation characteristics of the beam window caused by the impinging jet. In this presentation, we will discuss the results of a study on the effect of stiffness on the oscillation of a beam window caused by an impinging jet by means of a mock-up experiment.