EDM collaboration meeting WBS 9.0: Slow controls, Simulations, DAQ/data analysis

Chris Gould- North Carolina State University and Triangle Universities Nuclear Laboratory

Major subgroups

Four sub tasks, divided into six work packages• 9.1 Slow controls• 9.2 Simulations• 9.3 Data acquisition system• 9.4 Data analysis

Slow controls

• EPICS (Experimental Physics and Industrial Control System) used to control the experiment (SNS, APS..)

• Five identical sub-systems for neutronics, cryogenics, He-3, inserts, and magnetic fields (N,C,H,I,M)

• N,C,H,I,M groups will select hardware compatible as much as possible with existing EPICS software

• Utilize Unix/Linux and VME to capitalize on existing software libraries at APS

• Deliver VME systems to subgroups to incorporate into their control systems

EPICS Supports a Standard Control System EPICS Supports a Standard Control System ArchitectureArchitecture

Workstations: Sun Hp DEC/Alpha Silicon Graphics PCOS: Unix, Some Windows

I/O Controllers: VME,VXI PCI, WorkstationsOS: vxWorks, Unix, Windows RTEMS, RTLinux, L4 linux

Field I/ORemote and Local I/O Buses: Control Net, PCI, CAN-Bus, Industry Pack, VME, VXI, PCI, ISA, CAMAC, GPIB, Profibus, Bitbus, Serial, Allen-Bradley, Modbus, Yokogawa, G-3, Ethernet/IP

Field I/O Field I/O

Site LAN/WAN

Field I/O

Courtesy Bob Dalesio (APS)

Simulations

• Overall simulations/GEANT guru needed to coordinate efforts

• Neutronics: transport from the guide into the cell, plus inside and outside (n,gamma) backgrounds (UKY+..)

• Measurement cells: modeling n and 3He transport (spins and trajectories) and interactions (NC State, Caltech+..)

• Light transport: from initial uv production to pe’s per event at pm tubes (LANL+….)

• Experiment optimization: simulation of all aspects of a run cycle (Illinois?+..)

• B and E fields: full simulation of E and B fields in a complete experimental configuration (Caltech+…)

Neutronics simulations

• confirm input from SNS neutronics model for FNPB• simulate neutron beam transport into measurement cell• write code to analyze the neutron activation• write code to analyze small angle scattering through windows• write code to design collimation• document summarizing results to collaboration• simulate effect of neutron/gamma backgrounds• write code to model beam-induced neutron/gamma backgrounds• write code to model external neutron/gamma backgrounds• document summarizing results to collaboration• simulate required external neutron/gamma shielding• write code to model requirements of external neutron/gamma shielding• document summarizing results to collaboration

Experimental run cycle optimization

• simulation to optimize experimental run parameters• write code to model 3He filling with polarization

tracking/monitoring• write code to model neutron filling with polarization

tracking/monitoring• write code to optimize EDM measurement sequence• write code to model the application of fields to the

measurement region• write code to model the 3He removal• document summarizing experimental run parameters

Measurement cell dynamics

• write code to model magnetic and electric fields into code

• simulate trajectories in measurement cells• write code for UCN trajectories• write code for 3He trajectories• simulate spin dynamics in measurement cells• write code for UCN spins• write code for 3He spins• Write code to model n-3He interactions• document summarizing neutron cell dynamics

Light transport simulations

• write code to model UV propagation from capture event

• write code to model light down conversion process• write code to model visible light transport• write code to model detection, with estimates of

photoelectron production• write code to model afterpulse propagation and

detection• document summarizing light transport for

collaboration

DAQ and data analysis simulation

• DAQ incorporates transient digitizers, cosmic rejection (maybe), and local analysis capability

• 1 kHz event rate at ~ 10kB/event = 10MB/sec• 20 TB of data anticipated – archived locally and off

site using RAID arrays and tape• Need a fast DAQ/analysis system to supplement TD

system• Asssess need for cosmic rejection• Simulation of afterpulsing needed to guide TD

purchase specifications and DAQ needs

Cost Estimate – unburdened hardware

• 9.1.2 Servers: 5 x ($20K +$12K) = $160K + $22K (vxworks) = $182K

• 9.1.3 Clients: workstation x 4 +14TB RAID = $42K• 9.2: DAQ: Transient digitizers etc. $57K• Cosmic suppression system $100K• 9.3: Simulations: 4 x ($7K) = $28K• 9.4 Data analysis: 14TB RAID system + 20TB tape

back up $39K

• Total unburdened hardware = $448K

Cost Estimate – totals

• Unburdened hardware = $448K (assume 100% capitalized)*1.10 contingency = $493K

• (last time: $378K for electronics, cables, computers; the difference is the cosmic suppression system)

• Software engineer 2579hrs*$92 = $237.2K • Technician 506hrs*$63 = $30.9K• Total personnel*1.10 contingency = $295K

• TOTAL ~$800K

Company LANL

Current Date 5/23/2006

Title Electronics, Computers, Simulations, Data Analysis

Project Start 10/16/2006 8:00:00 AM

Project Finish 9/21/2008 5:00:00 PM

Staffing Plans

While many tasks are nominally assigned, significant career advancement opportunities remain:

• Overall subsystem manager• Work package coordinators for simulations, DAQ and

data analysis• Simulation guru with GEANT expertise particularly

needed to lay out overall guidelines for subgroups• EPICS experts/volunteers needed for all of five

subsystems