19–24 May 2024
Music City Center
US/Central timezone

Measurement of ozone concentration at the BL-02A beamline hutch in the Taiwan photon source for ensuring personnel safety

THPS14
23 May 2024, 16:00
2h
Blues (MCC Exhibit Hall A)

Blues

MCC Exhibit Hall A

Poster Presentation MC7.T13 Cryogenics Thursday Poster Session

Speaker

Po-Jiun Wen (National Synchrotron Radiation Research Center)

Description

The Taiwan Photon Source (TPS) BL-02A beamline at the National Synchrotron Radiation Research Center is a curved magnet beamline designed for white light mi-crotomography experiments, wherein biological samples are irradiated with high-energy white light for structural analysis. Experimenters frequently complain of odors when entering the end-station Hutch to change samples, which may be attributed to high concentrations of ozone. Ozone is a toxic gas that is produced when white light radiation reacts with oxygen in the air. Therefore, analyz-ing the ozone concentration distribution within the Hutch is necessary to evaluate safe windows of time for personnel to enter and the type of personal protective equipment that should be used.
The TPS operates at a stored energy and current of 3.0 GeV and 500 mA, respectively, with ventilation air condi-tioning turned off in the beamline Hutch. We measured ozone concentrations in regions of white light exposure at the front end (15 cm) and rear end (13.5 cm) of the Hutch, with the light source turned on for 300 s and off for 300 s. We placed the detector at different distances above, below, and to the right of the beam center. Our results demonstrated that more ozone was produced when white light was exposed for a longer duration. At any given distance, the highest amount of ozone was generat-ed above the beam center, followed by to the right side and below the beam center. These findings can serve as a reference for evaluating the health and safety of research-ers exposed to ozone in their work environments.

Region represented Asia
Paper preparation format Word

Primary author

Po-Jiun Wen (National Synchrotron Radiation Research Center)

Co-authors

Yu-Chi Lin (National Synchrotron Radiation Research Center) Sy-Yu Lin (National Synchrotron Radiation Research Center) Miao-Hua Chang (National Synchrotron Radiation Research Center)

Presentation materials

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