Absolute calibration of LHAASO WFCTA camera based on LED

Issued Date

2022-01-01

Resource Type

Article

ISSN

01689002

DOI

10.1016/j.nima.2021.165824

Scopus ID

2-s2.0-85119952163

Journal Title

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Volume

1021

Rights Holder(s)

SCOPUS

Bibliographic Citation

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment Vol.1021 (2022)

Suggested Citation

Aharonian F., An Q., Axikegu, Bai L.X., Bai Y.X., Bao Y.W., Bastieri D., Bi X.J., Bi Y.J., Cai H., Cai J.T., Cao Z., Cao Z., Chang J., Chang J.F., Chen B.M., Chen E.S., Chen J., Chen L., Chen L., Chen M.J., Chen M.L., Chen Q.H., Chen S.H., Chen S.Z., Chen T.L., Chen X.L., Chen Y., Cheng N., Cheng Y.D., Cui S.W., Cui X.H., Cui Y.D., Dai B.Z., Dai H.L., Dai Z.G., Danzengluobu, della Volpe D., Piazzoli B.D.E., Dong X.J., Duan K.K., Fan J.H., Fan Y.Z., Fan Z.X., Fang J., Fang K., Feng C.F., Feng L., Feng S.H., Feng Y.L., Fu Y.T., Gan H.Y., Gao B., Gao C.D., Gao L.Q., Gao Q., Gao W., Ge M.M., Geng L.S., Gong G.H., Gou Q.B., Gu M.H., Guo F.L., Guo J.G., Guo X.L., Guo Y.Q., Guo Y.Y., Han Y.A., He H.H., He H.N., He J.C., He S.L., He X.B., He Y., Heller M., Hor Y.K., Hou C., Hu H.B., Hu S., Hu S.C., Hu X.J., Huang D.H., Huang Q.L., Huang W.H., Huang X.T., Huang X.Y., Huang Z.C., Ji F., Ji X.L., Jia H.Y., Jiang K., Jiang Z.J., Jin C., Ke T., Kuleshov D., Levochkin K., Li B.B., Li C., Li C., Li F. Absolute calibration of LHAASO WFCTA camera based on LED. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment Vol.1021 (2022). doi:10.1016/j.nima.2021.165824 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/86933

Title

Absolute calibration of LHAASO WFCTA camera based on LED

Author(s)

Aharonian F.
 An Q.
 Axikegu
 Bai L.X.
 Bai Y.X.
 Bao Y.W.
 Bastieri D.
 Bi X.J.
 Bi Y.J.
 Cai H.
 Cai J.T.
 Cao Z.
 Cao Z.
 Chang J.
 Chang J.F.
 Chen B.M.
 Chen E.S.
 Chen J.
 Chen L.
 Chen L.
 Chen M.J.
 Chen M.L.
 Chen Q.H.
 Chen S.H.
 Chen S.Z.
 Chen T.L.
 Chen X.L.
 Chen Y.
 Cheng N.
 Cheng Y.D.
 Cui S.W.
 Cui X.H.
 Cui Y.D.
 Dai B.Z.
 Dai H.L.
 Dai Z.G.
 Danzengluobu
 della Volpe D.
 Piazzoli B.D.E.
 Dong X.J.
 Duan K.K.
 Fan J.H.
 Fan Y.Z.
 Fan Z.X.
 Fang J.
 Fang K.
 Feng C.F.
 Feng L.
 Feng S.H.
 Feng Y.L.
 Fu Y.T.
 Gan H.Y.
 Gao B.
 Gao C.D.
 Gao L.Q.
 Gao Q.
 Gao W.
 Ge M.M.
 Geng L.S.
 Gong G.H.
 Gou Q.B.
 Gu M.H.
 Guo F.L.
 Guo J.G.
 Guo X.L.
 Guo Y.Q.
 Guo Y.Y.
 Han Y.A.
 He H.H.
 He H.N.
 He J.C.
 He S.L.
 He X.B.
 He Y.
 Heller M.
 Hor Y.K.
 Hou C.
 Hu H.B.
 Hu S.
 Hu S.C.
 Hu X.J.
 Huang D.H.
 Huang Q.L.
 Huang W.H.
 Huang X.T.
 Huang X.Y.
 Huang Z.C.
 Ji F.
 Ji X.L.
 Jia H.Y.
 Jiang K.
 Jiang Z.J.
 Jin C.
 Ke T.
 Kuleshov D.
 Levochkin K.
 Li B.B.
 Li C.
 Li C.
 Li F.

Author's Affiliation

State Key Laboratory of Particle Detection & Electronics
 Nanjing University
 Shanghai Astronomical Observatory Chinese Academy of Sciences
 Institute for Nuclear Research of the Russian Academy of Sciences
 Shandong University
 Wuhan University
 Yunnan University
 Institute of High Energy Physics Chinese Academy of Science
 University of Chinese Academy of Sciences
 Guangzhou University
 Tsinghua University
 Sun Yat-Sen University
 University of Science and Technology of China
 Zhengzhou University
 Institiúid Ard-Lénn Bhaile Átha Cliath
 Università degli Studi di Napoli Federico II
 Sichuan University
 National Astronomical Observatories Chinese Academy of Sciences
 Max-Planck-Institut für Kernphysik
 National Institute of Metrology China
 Southwest Jiaotong University
 Purple Mountain Observatory Chinese Academy of Sciences
 Université de Genève
 Hebei Normal University
 Tibet University
 TIANFU Cosmic Ray Research Center

Other Contributor(s)

Mahidol University

Abstract

The main scientific goal of the LHAASO WFCTA experiment is to measure the cosmic ray energy spectra and composition from 10 TeV to 1 EeV. Cherenkov photons in the extensive air shower measured by the SiPM camera of Cherenkov telescopes can be used to reconstruct the cosmic ray energy. The absolute calibration of the camera is a crucial step to achieve the accurate measurement of the cosmic ray energy spectrum. A multi-wavelength cylindrical illuminator based on LEDs is developed and mounted inside the telescope to calibrate and monitor the camera, and the illuminator's stability is better than 0.5% under the temperature variation from -26 to 26 °C. A portable probe with a single photoelectron resolution of 21.6% is developed. After calibration by National Institute of Metrology, China (NIM), the probe is taken to the LHAASO site to measure the absolute photon density of the cylindrical illuminator inside the telescope. Based on the illuminator with known photon density, the photon conversion factor of the camera can be calibrated, and the overall calibration uncertainty is less than 2.6%.

Keyword(s)

Physics and Astronomy

Availability

URI

https://repository.li.mahidol.ac.th/handle/20.500.14594/86933

Collections

Scopus 2022