1. The Wendelstein 7-X steady state DAQ and control system for initial operation
Andreas Werner and W7-X CoDaC Team
Max-Planck-Institut für Plasmaphysik, Germany
EURATOM-Association

2. Status and scope of the W7-X CoDaC project:
Intro
Status and scope of the W7-X CoDaC project:
Definition of initial configuration (end 2014)
Sketch of the project until 2014
Achievements
Improvements

3. Coarse Control & DAQ Project Plan
CoDa concept &
basic implementation
WEGA test
Internal
reviews
final implementations
& setup frontend systems
External Design Review
W7-X
commissioning
2005
2007
2011
2012
2014

4. W7-X CoDaC Structure HPSS Central Control System PLC
Central Safety System PLC
Sequence
Controller
Plasma Control
Configuration DB
Central
Time
Event
Distribution
GPS
Control Room
& Montoring
Scientific& Administration Offices
SOA / Data
Analysis
Control Room and Office Cloud
Virtual Desktops
Storage Systems
High Availability Storage
Archive Data
Server
High Scalability Storage
Central Server Cloud
Central IT-Services
Local PLC
Segment RTControl
DAQ
Local PLC
Segment RTControl
DAQ
Frontend
System
Frontend
System
Long Term Archive
& Policy Driven Data Management
HPSS
Images by Siemens, Dell, EMC, HP, Oracle

5. WEGA Testbed & Achievements
Concept proof of PLC and RT segment control
[J. Schacht et al. 6th IAEA TM]
Test of individual DAQ systems and integration of FPGA based systems
Test of communication between systems
Collaborative work on CoDa-system configuration
Indestructable small size stellarator
Test of experiment program planning tool (Xedit) and early involvement of experiment leaders

6. WEGA: Experiment Planning High Level Parameter (HLP) Concept
Initial W7-X operation with constructive editor approach
(deductive approach postponed):
Modification of segment programs & modification of HLPs
Preview & check of HLP set points
=> Xedit [A. Spring O3-4]
Time
Gas Flow
Magnetic Field :
Valve
open
Post
Processing
Open
valve
Prep.
Magn.1
Magn. 1
ready up
Magnetrons
off
Magnetron (1,2)Power
Prep. ready
Magn.2
Large Plasma Radius
Iota / safety factor
Max. 39 s
Plasma
Operation
Start up
Preparation
Transformation to low level (technical) parameter
[HLP concept H. Riemann et al. 7th IAEA TM]
Combination of different transformations and limits into component models
[M. Lewerentz O3-3]

7. WEGA Segment Control ECRH OXB Transition
Power rise
density rises
-> OXB
µWave stray
radiation drops
in Bernstein wave
heating scenario
asap
Combined signal
by stray radiation
and density
Segment switch by
Plasma state
Magnetron + Gyrotron
heating
Gyrotron heating,
central deposition only
[H. Laqua O3-5]

8. Improvements/Tasks for W7-X initial operation
Initial phase (2014 – 2018) is made for short pulses (< 40s), CoDa system will be prepared for steady state:
Get the steady state control and data acquisition reliably running
Segment control works routinely
DAQ system works routinely, higher reliability required
DAQ hardware ATCA, SIO, NI-PXI + FPGA specials
Establishment of plasma interlock systems from uncertain information, e.g. video of first wall and interlocks
Establishment of station configuration and experiment program planning for large system configurations (step from WEGA to W7-X)
Establishment of W7-X scenarios, i.e. intelligent segment programs

9. Setup of Frontend Systems
Current planning 27 diagnostics
+ 8 experiment aux. systems:
Setup of the 12 most important diagnostic systems until 2014, others follow in OP1
No access for one week
(superconducting magnets, mechanical supports)
=> remote management comprising many actors
[J. Schacht O3-6]
Configuration setup in database for segment control
High performance DAQ:
At present, focus on ATCA system as the standard high performance DAQ for W7-X
[B. Goncalves O2-4]
Local PLC
Segment RTControl
DAQ
DAQ achievements so far:
46 Mbyte/s continuous limited by archive DB
ATCA 64 channels
2 MSPS (single controller)
=> 280 Mbyte/s envisaged

10. Improvement of the DAQ Software
Suppose that a DAQ station is likely to fail after 1000 shots of 10 s duration: W7-X will have 100 stations and 1000 s shots => 10 station failures within a single „shot“ !!
High reliability requires good software quality [QM processes, G. Kühner P2-02] and very good testability (long runs) of the software.
Preparation for real time support in DAQ stations

11. Collaborative Work with the Configuration and Segment DB
computer(s) controlling a component
Components (Magnets, ECRH, etc.) + diagnostics
W7-X (or lab experiment)
Specific software modules, e.g. hardware control …
Project
Comp. A
Comp. Z (
… )
Control station b
Control station a
Module 2
Module 1
Module n
Comp. B
Description of:
Hardware, Software,
HLP, parameter values in segments,…
DB View
Tools for concurrent access, introduction of team work processes 11

12. Enhanced HLP Structure (2 Layers)
Model Parameter (HLP)
calculation/check of model
limits/domains
Sophisticated Physics and Technical Model
or even only
1:1 Mapping
Modelling Framework
component models
coupling to SOA
Named Control Parameter (HLP)
definition of limits/domains
Component A
Component B
Component C
Technical Parameter (LLP)

13. Scalable Mass Storage System
30 Gbyte/s data rate
4 Pbyte/a theoretically
1 Pbyte/a design value
DAQ station data streaming to data server (decoupling)
Data server with parallel filesystem
(IBM GPFS)
Data migration with HPSS (IBM)
Based on policies
Integration of different storage techniques
=> requires scalable network

14. Scalable and Virtual Cluster Network
Scalable Core Switches
Clos fabric instead of crossbar backplane
(N+2 redundancy)
Multi chassis trunking ( >2 cores)
Single core routing capacity up to 15 Tbit/s
Ethernet fabric for virtual (VMware) cluster
made of several layer 2 switches
distributed knowledge of MAC addresses
Supports virtual IP subnets (VM motions)
Decoupling between computing center configuration and hardware structure
Brocade solution (NetIron MLXe)

15. Cloud system / control room
User wants to take sessions from the control room to his office
High availibility solution + simple maintenance + backup / instant recovery
System under test (ECRH control room):
Control Room and Office Cloud
Virtual Desktops
test
Central Server Cloud
Central IT-Services
productive

16. Service Oriented Architecture for Data Analysis
SOA / Data
Analysis
Production SOA in progress (with eventing for analysis chains)
Running on VMware vSphere environment (Cloud Solution)
Physists started to implement their services, e.g. fast stellarator equlibrium FP (20 ms response time)

17. Summary
Coarse Plan till 2014, tight plan for frontend system series production
Consolidation of the CoDaC software stack and in few cases basic improvements (DAQstation software and configuration database)
Middleware setup (SOA and cloud infrastructure)
Setup of backend systems like mass storage, network/server systems and control room/office workstations

18. W7-X CoDaC Team Plasma control and data acquisition development:
T. Bluhma, M. Grahla, P. Heimannb, C. Henniga, H. Kroissb, J. Kroma, G. Kühnera ,
H. Laquaa, M. Lewerentza, J. Maierb, H. Riemanna, J. Schachta, A. Springa, A. Wernera,
M. Zilkerb
a Max-Planck-Institute for Plasmaphysics, Teilinstitut Greifswald, Wendelsteinstr. 1, Greifswald, Germany
b Max-Planck-Institute for Plasmaphysics, Computing Center RZG, Boltzmannstr. 2, Garching, Germany