Merger and Data Transmission in CDCTRG for BelleII
Yun-Tsung Lai1*, Min-Zu Wang1, Jing-Ge Shiu1
1Department of Physics, National Taiwan University, Taipei, Taiwan
* presenting author:賴昀樅,
We use the data from Belle II Central Drift Chamber (CDC) to validate our online tracking algorithm in the CDC trigger(TRG) system with FPGA chips. In this system, the trigger Merger boards simplify the data flow from the front-end readout boards to the rear-end global trigger system. NTUHEP is responsible for the firmware design and quality check of Merger boards.
For the data flow in the CDCTRG system, we developed an user-defined streaming protocol with 8B/10B and 64B/66B encoding, and also designed the scheme of data flow control and synchronization in the global trigger system. The design of user-defined protocol and its application will also be presented.

Keywords: trigger system, data transmission, tracking algorithm, B meson