1. JEDI polarimetry – Developments at SMART|EDM_Lab
David Mchedlishvili | 1st SMART|_Lab’s Workshop
(PI at SMART|EDM_Lab of TSU, HEPI TSU)

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

3. 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

4. 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

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

6. More pictures…
30/09/2016
David Mchedlishvili

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

8. 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

9. 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

10. 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

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

12. 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

13. 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

14. 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

15. 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

16. 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 )
Develop ideas towards medical applications – Next generation PET architecture (ISTC grant application is currently under review)
30/09/2016
David Mchedlishvili

17. Thank you
30/09/2016
David Mchedlishvili