Mitglied der HelmholtzGemeinschaft TSU HEPI JEDI polarimetry Developments

Mitglied der Helmholtz-Gemeinschaft TSU HEPI JEDI polarimetry – Developments at SMART|EDM_Lab David Mchedlishvili | 1 st SMART|_Lab’s Workshop (PI at SMART|EDM_Lab of TSU, HEPI TSU) 30. 09. 2017

TSU HEPI Overview • What we do at Jülich • SMART|EDM_Lab contribution • Goals and achievements • Future plans 30/09/2016 David Mchedlishvili 2

TSU HEPI 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 3

TSU HEPI JEDI polarimeter • High precision Ballistic Diamond Pellet Target • High efficiency • High stability • No magnetic / electric field Calorimeter 30/09/2016 David Mchedlishvili 4

TSU HEPI Tests at COSY Target wheel First test - 4 LYSO modules Second test – 24 LYSO modules Moving arms 30/09/2016 David Mchedlishvili 5

TSU HEPI More pictures… 30/09/2016 David Mchedlishvili 6

TSU HEPI What we do at SMART|EDM_Lab 30/09/2016 David Mchedlishvili 7

TSU HEPI DAQ and online analysis: Overview LYSO modules Start & Stop counters 16 ch. FADC (SIS 3316) EMS cluster server Event builder Analyses modules Data manager VETO detectors Event builder, data manager and client software parts are based on CERN ROOT libraries 30/09/2016 PC #2 PC #1 David Mchedlishvili PC #3 Clients (access spectra) 8

TSU HEPI DAQ and online analysis: Struck SIS 3316 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 30/09/2016 David Mchedlishvili FPGAs 9

TSU HEPI 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 10

TSU HEPI DAQ and online analysis: Online results Spectra from individual channels Asymmetries Particle identification 30/09/2016 David Mchedlishvili 11

TSU HEPI Other tools: Redpitaya DAQ Redpitaya ü FPGA based 2 ch 125 MS/s DAC and function generator ü Linux on board ü C/C++ compiler ü Communication via LAN Raspberry Pi ü Root based online analysis software Stand-alone test bench for LYSO lab tests LAN 30/09/2016 David Mchedlishvili 12

TSU HEPI 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 13

TSU HEPI 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 14

TSU HEPI Hardware development: Voltage supply for Si. PMs Main requirements: • High stability (<10 m. V/30 V) • Low noise • Modular design • Remote adjustments and output monitoring See talk by Otari Javakhishvili for more details 30/09/2016 David Mchedlishvili 15

TSU HEPI Future plans Ø Prepare for upcoming experiment – 56+ readout channels (V supplies, LYSO modules, software, hardware, mechanics …) Ø Submit HORIZON 2020 ERC Starting grant application – DPC-POL (my previous talk from 29. 09. 2017) Ø Develop ideas towards medical applications – Next generation PET architecture (ISTC grant application is currently under review) 30/09/2016 David Mchedlishvili 16

TSU HEPI Thank you 30/09/2016 David Mchedlishvili 17