| Article | |
| Report number | arXiv:2009.12096 |
| Title | Optical transceivers for event triggers in the ATLAS phase-I upgrade |
| Author(s) | Zhang, L. (Hua-Zhong Normal U. ; Southern Methodist U.) ; Chen, C. (Southern Methodist U.) ; Cohen, I. (Southern Methodist U.) ; Cruda, E. (Southern Methodist U.) ; Gong, D. (Southern Methodist U.) ; Hou, S. (Taiwan, Inst. Phys.) ; Hu, X. (Michigan U.) ; Huang, X. (Hua-Zhong Normal U. ; Southern Methodist U.) ; Li, J.-H. (Taiwan, Inst. Phys. ; Taiwan, Natl. Taiwan U.) ; Liu, C. (Southern Methodist U.) ; Liu, T. (Southern Methodist U.) ; Murphy, L. (Southern Methodist U.) ; Schwarz, T. (Michigan U.) ; Sun, H. (Hua-Zhong Normal U. ; Southern Methodist U.) ; Sun, X. (Hua-Zhong Normal U.) ; Thomas, J. (Southern Methodist U.) ; Wang, Z. (Southern Methodist U.) ; Ye, J. (Southern Methodist U.) ; Zhang, W. (Hua-Zhong Normal U. ; Southern Methodist U.) |
| Publication | 2021-01-01 |
| Imprint | 2020-09-25 |
| Number of pages | 5 |
| Note | 6 pages, 10 figures |
| In: | Nucl. Instrum. Methods Phys. Res., A 985 (2021) 164651 |
| In: | 12th international "Hiroshima" Symposium on the Development and Application of Semiconductor Tracking Detectors (HSTD), Hiroshima, Japan, 14 - 18 Dec 2019, pp.164651 |
| DOI | 10.1016/j.nima.2020.164651 |
| Subject category | physics.ins-det ; Detectors and Experimental Techniques ; Detectors and Experimental Techniques |
| Accelerator/Facility, Experiment | CERN LHC ; ATLAS |
| Abstract | The ATLAS phase-I upgrade aims to enhance event trigger performance in the Liquid Argon (LAr) calorimeter and the forward muon spectrometer. The trigger signals are transmitted by optical transceivers at 5.12 Gbps per channel in a radiation field. We report the design, quality control in production and ageing test of the transceivers fabricated with the LOCld laser driver and multi-mode 850 nm vertical-cavity surface-emitting laser (VCSEL). The modules are packaged in miniature formats of dual-channel transmitter (MTx) and transceiver (MTRx) for the LAr. The transmitters are also packaged in small form-factor pluggable (SFP) for the muon spectrometer. In production, the LOCld chips and VCSELs in TOSA package were examined before assembly. All of the modules were tested and selected during production for quality control based on the eye-diagram parameters measured at 5.12 Gbps. The yield is 98 % for both the MTx and MTRx on a total 4.7k modules. The uniformity of transmitter channels of a MTx was assured by choosing the TOSA components with approximately equal light powers. The ageing effect is monitored in burn-in of a small batch of transmitter modules with bit-error test and eye-diagrams measured periodically. The observables are stable with the light power degradation within 5 % over a period of more than 6k hours. |
| Copyright/License | publication: © 2020-2025 Elsevier B.V. preprint: (License: arXiv nonexclusive-distrib 1.0) |
Corresponding record in: Inspire
Record created 2022-12-14, last modified 2024-10-15
