Speaker
zhang fei
(IHEP)
Description
The Silicon Tungsten Tracker (STK) is a detector of the DAMPE satellite to measure the incidence direction of high energy cosmic ray. It consists of 6 layers of silicon micro-strip detectors interleaved with Tungsten converter plates. The entire STK contains 73,728 readout channels totally and can be read out according to external average 50 Hz trig. It’s a great challenge for space mission that all data acquisition (DAQ) works of detector signal digitization, data process and transfer are finished in 3 milliseconds dead time.
In order to meet above requirements, 8 identical Tracker Readout Boards (TRB) are developed to control and read the front Application Specific Integrated Circuits (ASIC) signals. 8 TRBs work simultaneously according to every trig. In each TRB, there are 2 Field Programmable Gate Arrays (FPGA), 48 serial ADCs to process front 144 ASICs. A SRAM is also adopted in each TRB for data buffer. LVDS and RS422 are used for scientific data and telemetry communication with payload DAQ. Benefiting from the FPGA’s rich resources and feature of work in parallel, data process includes pedestal subtraction, common noise subtraction, cluster finding and data compressing is realized inside two FPGAs.
The TRB readout electronics of hardware and software for STK will be introduced in this poster.
| Registration number following "ICRC2015-I/" | 786 |
|---|
Primary author
zhang fei
(IHEP)
Co-authors
Mr
Di Wu
(IHEP)
Mr
Ke Gong
(IHEP)
Dr
Rui Qiao
(IHEP)
Wenxi Peng
(IHEP)
Xin Wu
(Universite de Geneve (CH))
giovanni.ambrosi@pg.infn.it
Dr
yifan Dong
(IHEP)
