Development of x-ray optics for the solar flare sounding rocket FOXSI-4: vibration test

We have been developing our original X-ray optics for FOXSI-4, and ensuring vibration tolerance is one of the most important and difficult test items for optics. We designed mounting jigs to reproduce the required vibration level in 20-2000 Hz and finally reproduced the vibration spectra along three axes successfully. We conducted vibration tests for both flight model soft and hard X-ray optics along three axes, and a comparison of the imaging quality before and after the vibration showed no significant difference. Moreover, we evaluated the mechanical axes of the optics housing before and after the vibration tests. The results showed that the mechanical axes were consistent with each other within the repeatability. In addition, we investigated the impacts on their vibration response spectra with screw lock and shims. In this poster, we will introduce the details of our vibration tests.