Washimi, Yokozawa, Taiki Tanaka

We measured resonances of optical tables at REFL, POP, POS, AS by hand hammering and shaker (only RFEL).

By these results,

* REFL table has

y-axis: 23, 40, 119, 139 Z-axis: 23, 56, 74, 111.5, 119, 140

Hz resonances

* AS table has

z-axis: 31, 66, 122.5, 127, 134, 146, 195, 235

Hz resonances

* POP table has

z-axis: 28, 38, 88, 213.75, 319, 370

Hz resonances

* POS table has

z-axis: 31.875, 48.75, 60.375, 87.875, 107, 129, 143, 150, 254, 313.875

Hz resonances