Author/Authors :
Walston، نويسنده , , Sean and Boogert، نويسنده , , Stewart and Chung، نويسنده , , Carl and Fitsos، نويسنده , , Pete and Frisch، نويسنده , , Joe and Gronberg، نويسنده , , Jeff and Hayano، نويسنده , , Hitoshi and Honda، نويسنده , , Yosuke and Kolomensky، نويسنده , , Yury and Lyapin، نويسنده , , Alexey and Malton، نويسنده , , Stephen and May، نويسنده , , Justin D. McCormick، نويسنده , , Douglas and Meller، نويسنده , , Rob، نويسنده ,
Abstract :
It has been estimated that an RF cavity Beam Position Monitor (BPM) could provide a position measurement resolution of less than 1 nm. We have developed a high resolution cavity BPM and associated electronics. A triplet comprised of these BPMs was installed in the extraction line of the Accelerator Test Facility (ATF) at the High Energy Accelerator Research Organization (KEK) for testing with its ultra-low emittance beam. The three BPMs were each rigidly mounted inside an alignment frame on six variable-length struts which could be used to move the BPMs in position and angle. We have developed novel methods for extracting the position and tilt information from the BPM signals including a robust calibration algorithm which is immune to beam jitter. To date, we have demonstrated a position resolution of 15.6 nm and a tilt resolution of 2.1 μ rad over a dynamic range of approximately ± 20 μ m .
Keywords :
Cavity beam position monitor , BPM , Accelerator Test FacilityATF , International Linear ColliderILC
