A Prototype Scalable Readout System for Micro-pattern Gas Detectors

TL;DR

This paper presents a scalable, flexible readout system architecture for micro-pattern gas detectors, capable of handling thousands of channels with modular FPGA-based components and Ethernet data transfer.

Contribution

It introduces a reconfigurable, modular readout system architecture adaptable to various detector types and scales, verified with VA140 and AGET ASIC chips.

Findings

System supports up to 512 channels per FEC with VA140

System supports up to 256 channels per FEC with AGET

Demonstrates scalability for thousands of detector channels

Abstract

A scalable readout system (SRS) is designed to provide a general solution for different micro-pattern gas detectors. The system mainly consists of three kinds of modules: the ASIC card, the Adapter card and the Front-End Card (FEC). The ASIC cards, mounted with particular ASIC chips, are designed for receiving detector signals. The Adapter card is in charge of digitizing the output signals from several ASIC cards. The FEC, edged-mounted with the Adapter, has a FPGA-based reconfigurable logic and I/O interfaces, allowing users to choose various ASIC cards and Adapters for different types of detectors. The FEC transfers data through Gigabit Ethernet protocol realized by a TCP processor (SiTCP) IP core in field-programmable gate arrays (FPGA). The readout system can be tailored to specific sizes to adapt to the experiment scales and readout requirements. In this paper, two kinds of multi-channel ASIC chips, VA140 and AGET, are applied to verify the concept of this SRS architecture. Based on this VA140 or AGET SRS, one FEC covers 8 ASIC (VA140) cards handling 512 detector channels, or 4 ASIC (AGET) cards handling 256 detector channels. More FECs can be assembled in chassis to handle thousands of detector channels.