Beam test results of IHEP-NDL Low Gain Avalanche Detectors(LGAD)

Xiao S., Alderweireldt S.,Ali S.,Allaire C., Agapopoulou C., Atanov N., Ayoub M. K., Barone G.,Benchekroun D., Buzatu A., Caforio D.,García L. Castillo, Chan Y.,Chen H., Cindro V., Ciucu L., da Costa J. Barreiro Guimarães, Cui H., Miralles F. Davó, Davydov Y., d'Amen G.,de la Taille C., Kiuchi R.,Fan Y., Falou A.,Ferreira A. S. C., Garau M., Ge J.,Ghosh A.,Giacomini G., Gkougkousis E. L., Grieco C., Guindon S., Han D., Han S., Holmberg M., Howard A.,Huang Y., Jing M., Khoulaki Y., Kramberger G.,Kuwertz E., Lefebvre H., Leite M., Leopold A., Li C.,Li Q.,Liang H.,Liang Z.,Liu B.,Liu J., Luthfi A., Lyu F., Malyukov S., Mandić I.,Masetti L., Mikuž M., Nikolic I., Polidori L., Polifka R., Posopkina O., Qi B., Ran K., Reynolds B. J. G., Rizzi C., Manzano M. Robles, Rossi E., Rummler A., Sacerdoti S.,Saito G. T., Seguin-Moreau N., Serin L., Shan L., Shi L., Sjostrom N. F.,Ferreira A. Soares Canas, Soengen J., Stenzel H., Szadaj A. J., Tan Y., Terzo S.,Thomas J. O.,Tolley E., Tricoli A., Trincaz-Duvoid S., Wang R.,Wang S. M.,Wang W., Wu K.,Shi X.,Yang T.,Yang Y.,Yu C., Zhang X.,Zhao L., Zhao M., Zhao Z., Zheng X., Zhuang X.

arxiv（2020）

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摘要

To meet the timing resolution requirement of up-coming High Luminosity LHC (HL-LHC), a new detector based on the Low-Gain Avalanche Detector(LGAD), High-Granularity Timing Detector (HGTD), is under intensive research in ATLAS. Two types of IHEP-NDL LGADs(BV60 and BV170) for this update is being developed by Institute of High Energy Physics (IHEP) of Chinese Academic of Sciences (CAS) cooperated with Novel Device Laboratory (NDL) of Beijing Normal University and they are now under detailed study. These detectors are tested with $5GeV$ electron beam at DESY. A SiPM detector is chosen as a reference detector to get the timing resolution of LGADs. The fluctuation of time difference between LGAD and SiPM is extracted by fitting with a Gaussian function. Constant fraction discriminator (CFD) method is used to mitigate the effect of time walk. The timing resolution of $41 \pm 1 ps$ and $63 \pm 1 ps$ are obtained for BV60 and BV170 respectively.

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