PoS - Proceedings of Science
Volume 444 - 38th International Cosmic Ray Conference (ICRC2023) - Cosmic-Ray Physics (Indirect, CRI)
Design and Implementation of a Portable Laser Calibration System for LHAASO-WFCTA
Q. Sun*, M. Jin, J. Xia, J. Liu, Z. Min, F. Zhu, L. Chen, Y. Wang, Y. Liu and Y. Zhang
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Pre-published on: July 25, 2023
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The Wide Field of View Cherenkov Telescope Array (WFCTA), situated in the harsh environment
of Daocheng, is established to investigate ultrahigh energy cosmic rays. To enhance the calibration
of WFCTA, a portable laser calibration system has been developed, which provides specified
energy and direction of the YAG laser. Special designs, including power system, north calibration,
and rotating system, have been implemented to ensure the proper functioning of the portable laser
calibration system. The aluminum alloy of the entire frame and the vibration damper provide
robust anti-impact ability and safety during transportation to different observation locations. A
temperature control facility has been employed to meet the operational temperature requirement
of electronic equipment. Various sensors have been utilized to monitor environmental parameters,
the energy of YAG laser pulses, azimuth and pitch angles, and other parameters in real-time.
The auto-control program is communicated wirelessly to avoid any manual interference with the
system. The field experiment results have confirmed the reliability of the system and its ability to
meet the calibration requirements of WFCTA.
DOI: https://doi.org/10.22323/1.444.0498
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