Electronics and DAQ for Panda X4 T Xiang

Panda. X-I&II Hardware, Trigger and Control System 2016 JINST 11 T 04002, ar. Xiv:

Panda. X Read-out and Triggers Panda. X DM experiments Panda. X-II Panda. X-4 T

Panda. X-4 T Electronics and DAQ System Small system in the Lab

Panda. X-4 T Global Trigger with ZLE Mode ZLE: Zero-Length-Encoding

Panda. X-4 T Self-Trigger with DAW Mode ADC Count ()0. 12 mv/LSB DAW: Dynamic

Panda. X-4 T DAQ Infrastructure and Controller

Panda. X-4 T Bandwidth Test Three-board Test (48 channels) with channel-by-channel Random Pulse Single-channel

Preliminary Test of the home-made FADC PMT + low-intensity LED See tomorrow’s talk in

Summary • New electronics system for Panda. X-4 T with triggerless read-out, and high-bandwidth

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Electronics and DAQ for Panda. X-4 T Xiang Ren, Qibin Zheng, Xun Chen, Yong Yang Shang. Hai Jiao Tong University 06/22/2018

Panda. X-I&II Hardware, Trigger and Control System 2016 JINST 11 T 04002, ar. Xiv: 1602. 00858 2017 JINST 12 T 08004, ar. Xiv: 1707. 02134

Panda. X-I&II Software Readout System

Panda. X Read-out and Triggers Panda. X DM experiments Panda. X-II Panda. X-4 T Number of channels 183 158 512 Maximum Digitizer drift time (us) S 2 Read-out threholds mechanism (PE) ~90 V 1724 (8 ch) 100 Single optical link and server External global ~350 V 1724 (8 ch) 50 Single optical link and server External Global ? Multiple links and servers Triggerless and external global ~700 Benefits of low-threshold DAQ: • Light-mediator DM models • S 2 -only analysis • very low-energy calibration • High-rate calibration V 1725 B (16 ch) Trigger

Panda. X-4 T Electronics and DAQ System Small system in the Lab

Panda. X-4 T Global Trigger with ZLE Mode ZLE: Zero-Length-Encoding

Panda. X-4 T Self-Trigger with DAW Mode ADC Count ()0. 12 mv/LSB DAW: Dynamic Acquisition Window Time(4 ns)

Panda. X-4 T DAQ Infrastructure and Controller

Panda. X-4 T Bandwidth Test Three-board Test (48 channels) with channel-by-channel Random Pulse Single-channel random pulse rate (Hz) # of Samples/ channel Net-work bandwidth usage for three boards 60 100 1. 3 MB/s 60 1000 5 MB/s 450 100 8 MB/s 450 1000 38 MB/s

Home-made FADC + Trigger Board

Preliminary Test of the home-made FADC PMT + low-intensity LED See tomorrow’s talk in T 5 (Qibin Zheng) our FADC (500 MS/s, 1. 8 Vpp, 14 -bit) V 1725 B Fit (36. 80%) our FADC Fit (34. 62%) V 1725 B (250 MS/s, 2 Vpp, 14 -bit)

Summary • New electronics system for Panda. X-4 T with triggerless read-out, and high-bandwidth DAQ infrastructure has been set up and tested. • Dynamic Acquisition Window • Parallel Readout with multiple-server and high-speed switch • Preliminary test of a home-made FADC with PMT usingle-photon data shows better Peak-to-valley ratio, SPE resolution.

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