Speaker
Description
Projectile nuclear fragmentation is a primary technique for producing radioactive nuclear beams, enabling the exploration of unstable nuclide regions in nuclear physics. In the study of heavy nuclei, alpha decay measurement is essential for nuclide identification due to the minimal differences in mass-to-charge ratios between adjacent isotopes and the presence of multiple charge states. Silicon detectors serve as one of the key subsystems for achieving these scientific objectives. In particular, silicon microstrip and silicon wafer detectors play a crucial role in particle identification. The experiment employed two silicon microstrip detectors with eight channels each and four silicon wafer detectors with one channel each. The combination of these detectors significantly enhanced particle discrimination capabilities. The readout electronics system was required to handle both high-energy beam signals and low-energy alpha particle signals. To meet this challenge, a set of readout electronics prototypes was developed. The system comprises 32 charge-sensitive preamplifier (CSA) modules and a readout control unit (RCU). The CSAs can gain switching, controlled by the RCU, to accommodate signals of varying energy levels. The RCU is implemented as an expandable 32-channel CPCI 6U standard card. Each channel of the RCU processes input signals through an analog front-end buffer circuit for amplification and filtering. Subsequently, a 32-channel 14-bit ADC (ADS52J90) digitizes the voltage pulse signals using the JESD204B protocol for high-speed data transmission. The digitized data are parsed, processed, and packaged by an onboard FPGA. Finally, the processed data are transmitted via optical fiber for downstream analysis. The readout electronics prototypes have been fabricated and are undergoing comprehensive electrical performance evaluation, along with preparations for integrated testing with radiation sources and beams in conjunction with the silicon detectors. The results of these tests will be presented at the conference.
| Workshop topics | Front-end electronics and readout |
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