AVS 60th International Symposium and Exhibition
    Vacuum Technology Tuesday Sessions
       Session VT-TuP

Paper VT-TuP5
Operation Status of the PLS-II Photon Absorbers

Tuesday, October 29, 2013, 6:00 pm, Room Hall B

Session: Vacuum Technology Poster Session and Student-Built Vacuum System Poster Competition
Presenter: C.D. Park, POSTECH, Republic of Korea
Authors: T. Ha, POSTECH, Republic of Korea
C.D. Park, POSTECH, Republic of Korea
Correspondent: Click to Email
The PLS-II storage ring photon absorbers are designed to accommodate the high heat load from the stored beam with 3 GeV beam energy and 400 mA beam current. Two temperature sensors are attached on the lower and upper part of the photon absorber body near to the thermally most severe point, which are placed inside the vacuum chamber. We report the operation status of the photon absorbers since the start of the commissioning in 2011. First, we compare the calculated temperature values with the measured ones during the beam stored up to 100 mA. From this results, we can estimate the temperature of the photon absorbers with 400 mA beam current more accurately. Second, We estimate the electron beam position by measured temperature differences between the upper and lower sensors. The results are compared with the measured values from the beam position monitor.