JEDI polarimetry – Developments at SMART|EDM_Lab David Mchedlishvili | 1st SMART|_Lab’s Workshop (PI at SMART|EDM_Lab of TSU, HEPI TSU) 30.09.2017
Overview What we do at Jülich SMART|EDM_Lab contribution Goals and achievements Future plans 30/09/2016 David Mchedlishvili
JEDI: Charged-Particle EDM Search Main principle: Inject polarized particles into a storage ring: Apply radial electric field E: Non-zero EDM spin rotation out of the plane Track spin rotation need precise polarimeter 30/09/2016 David Mchedlishvili
Ballistic Diamond Pellet Target JEDI polarimeter High precision High efficiency High stability No magnetic / electric field Ballistic Diamond Pellet Target Calorimeter 30/09/2016 David Mchedlishvili
Tests at COSY Second test – 24 LYSO modules Target wheel Moving arms First test - 4 LYSO modules 30/09/2016 David Mchedlishvili
More pictures… 30/09/2016 David Mchedlishvili
What we do at SMART|EDM_Lab 30/09/2016 David Mchedlishvili
DAQ and online analysis: Overview LYSO modules PC #1 PC #2 Start & Stop counters 16 ch. FADC (SIS3316) EMS cluster server Event builder VETO detectors Analyses modules Data manager Event builder, data manager and client software parts are based on CERN ROOT libraries PC #3 Clients (access spectra) 30/09/2016 David Mchedlishvili
DAQ and online analysis: Struck SIS3316 FADC 16 channels per module 250 MS/s per channel 125 MHz analog bandwidth 14-bit resolution Offset DACs Internal/External clock Readout in parallel to acquisition Capable of working in a chain QDC mode in parallel with SADC Built-in hardware features (Pile-up detection, averaging and more) Self triggering FPGAs 30/09/2016 David Mchedlishvili
DAQ and online analysis: Software EMS cluster server Reads data and structures it Saves data stream to file / sends over LAN Event builder (multi-threaded) Reads structured FADC data stream and reorganizes it Synchronizes different channels data using timestamps Builds events Data manager (multi-threaded) Reads event stream / file Runs analyses modules Listens to clients and sends histograms Client Controls data manager Gets results from analyses modules and draws spectra Handles configuration files 30/09/2016 David Mchedlishvili
DAQ and online analysis: Online results Spectra from individual channels Asymmetries Particle identification 30/09/2016 David Mchedlishvili
Other tools: Redpitaya DAQ FPGA based 2 ch 125 MS/s DAC and function generator Linux on board C/C++ compiler Communication via LAN Raspberry Pi Root based online analysis software Stand-alone test bench for LYSO lab tests LAN 30/09/2016 David Mchedlishvili
Other tools: Redpitaya DAQ Very handy for laboratory tests of the modules LYSO signal with COSY beam COSY cycles visible in the data Used to obtain very first data in recent experiments 30/09/2016 David Mchedlishvili
Offline data analysis Analysis of laboratory test data DAQ and detector performance tests Parameter evaluation See talk by Dito Shergelashvili for more details 30/09/2016 David Mchedlishvili
Hardware development: Voltage supply for SiPMs Main requirements: High stability (<10mV/30V) Low noise Modular design Remote adjustments and output monitoring See talk by Otari Javakhishvili for more details 30/09/2016 David Mchedlishvili
Future plans Prepare for upcoming experiment – 56+ readout channels (V supplies, LYSO modules, software, hardware, mechanics …) Submit HORIZON2020 ERC Starting grant application – DPC-POL (my previous talk from 29.09.2017) Develop ideas towards medical applications – Next generation PET architecture (ISTC grant application is currently under review) 30/09/2016 David Mchedlishvili
Thank you 30/09/2016 David Mchedlishvili