Here we describe diffractive measurements at RHIC in proton+proton collisions with a special optics run of β ∼ 21 m at STAR, at the centerof-mass energy √ s = 200 GeV during the the RHIC 2009 run. We present published results of single spin asymmetry as well as preliminary results on double spin asymmetries and central exclusive production. PACS number(s): 13.85.Dz and 13.88.+e