1. LHD Control and Data Y. Nagayama, et al.,6th IAEA-TM "Control, Data Acquisition, Remote Participation", 4-8 June 2007, Inuyama, Japan1/28 Control, Data Acquisition, Data Analysis and Remote Participation Y. Nagayama, et al.,6th IAEA-TM "Control, Data Acquisition, Remote Participation", 4-8 June 2007, Inuyama, Japan 1/28 on behalf of LHD group National Institute for Fusion Science (NIFS), 322-6 Oroshi, Toki 509-5292, Japan NIFS site: 470,000m 2 Building for Diagnostics Development LHD Control building LHD building Office Buildings Refrigerator compressor for liquid He Guest House Baseball park Tennis court Supercomputer building in LHD Y. Nagayama R1-2

2. LHD Control and Data Y. Nagayama, et al.,6th IAEA-TM "Control, Data Acquisition, Remote Participation", 4-8 June 2007, Inuyama, Japan2/28 M. Emoto, H. Nakanishi, S. Sudo, S. Imazu, S. Inagaki*, C. Iwata, M. Kojima, M. Nonomura, M. Ohsuna, M. Yoshida, K. Tsuda, H. Chikaraishi, H. Funaba, R. Horiuchi, S. Ishiguro, Y. Ito, S. Kubo, A. Mase*, T. Mito, J. Miyazawa, T. Muto, Y. Nakamura, K. Saito, R. Sakamoto, T. Seki, S. Takami, T. Yamamoto, T. Watanabe, A. Komori, O. Motojima and LHD Group NIFS, *Kyushu Univ. Related Presentations Control of Plasma/Device –Saito: P1-14 –Ito: P1-15 –Kasahara: P1-16 –Kubo: P1-17 –Chikaraishi: P1-18 –Miyazawa: P1-19 Data Acquisition/Database –Takahashi: P2-14 –Ohsuna: P2-15 –Nakanishi: P2-20 –Kojima: P2-21 Data Analysis –Emoto: O5-4 Fast Network/Remote Participation –Yamamoto: P1-38 –Tsuda: O9-1 Co-authors

3. LHD Control and Data Y. Nagayama, et al.,6th IAEA-TM "Control, Data Acquisition, Remote Participation", 4-8 June 2007, Inuyama, Japan3/28Y. Nagayama, et al.,6th IAEA-TM "Control, Data Acquisition, Remote Participation", 4-8 June 2007, Inuyama, Japan3/28 Outline LHD Control –Steady state –high desity Data acquisition –PC cluster (90GB/shot) –MSS Data analysis –GUI –Web browser of Supercomputer Remote Participation –Japanese Fusion Virtual Laboratory LHD Control and Data

4. Y. Nagayama, et al.,6th IAEA-TM "Control, Data Acquisition, Remote Participation", 4-8 June 2007, Inuyama, Japan4/28 Large Helical Device (LHD) is a steady sate machine. Magnetic field Flux surfaces Cross sections of LHD LHD has a heliotron configuration. –A twisted plasma is confined in closed flux surfaces. –No current, no disruption, super high density. Control, data acquisition and real time monitoring are challenging.

5. LHD Control and Data Y. Nagayama, et al.,6th IAEA-TM "Control, Data Acquisition, Remote Participation", 4-8 June 2007, Inuyama, Japan5/28 Objective of LHD is to clarify physics of fusion relevant plasma in steady state. For this purpose, we are developing: Superconducting magnet, High power heating (ECH, ICH, NBI) Plasma control (divertor, density, wall, position, ) and diagnostics Obtained plasma parameters: T i0 =5keV (n e =1.2x10 19 m -3 ) T e0 =10keV (n e =0.5x10 19 m -3 ) beta=5% n e0 =10 21 m -3 (T e0 =0.4 keV) W p =1.44 MJ T pulse =3,268 sec. (P ICH+ECH =0.5 MW, W heat =1.6GJ)

6. LHD Control and Data Y. Nagayama, et al.,6th IAEA-TM "Control, Data Acquisition, Remote Participation", 4-8 June 2007, Inuyama, Japan6/28 Plasma Production for 3268 sec with ICH Steady state plasma is maintained mainly by ICH. Total input energy is 1.6 GJ (world record). Magnetic axis is swung (3.65m<R ax < 3.67m) every 105 s to reduce the temperature rise of diverter plate. Kasahara: P1-16

7. LHD Control and Data Y. Nagayama, et al.,6th IAEA-TM "Control, Data Acquisition, Remote Participation", 4-8 June 2007, Inuyama, Japan7/28 Control of superconducting magnets, plasma position, ECH/ICRF heating and density in LHD Miyazawa: P1-19 Saito: P1-14 Kasahara: P1-16 Kubo: P1-17 Chikaraishi: P1-18

8. LHD Control and Data Y. Nagayama, et al.,6th IAEA-TM "Control, Data Acquisition, Remote Participation", 4-8 June 2007, Inuyama, Japan8/28 Liquid impedance matching system of ICRF Heating in LHD Feedback control of the liquid impedance matching system reduces reflected power drastically (fro 70% to 2%). Four antennas are connected to RF generators (38.47MHz, 0.5MWx4, 1 hour). Saito: P1-14 Kasahara: P1-16

9. LHD Control and Data Y. Nagayama, et al.,6th IAEA-TM "Control, Data Acquisition, Remote Participation", 4-8 June 2007, Inuyama, Japan9/28 Diffusion barrier made with H 2 pellet Injection 10 21 m -3 plasma is obtained! It’s a miracle! Why no disruption nor the radiation collapse takes place? –LHD plasma may expel impurities. Sakamoto H 2 ice pellet

10. LHD Control and Data Y. Nagayama, et al.,6th IAEA-TM "Control, Data Acquisition, Remote Participation", 4-8 June 2007, Inuyama, Japan10/28 Growing number of diagnostics requires the PC cluster technology for a data acquisition system PC cluster system (LABCOM system) has benefits –Cost effective –Flexible Key technology of PC cluster system: –Data management –Maintenance for Steady state DAQ for Short pulse DAQ Nakanishi: P2-20 Kojima: P2-21 Ohsuna: P2-15 2005

11. LHD Control and Data Y. Nagayama, et al.,6th IAEA-TM "Control, Data Acquisition, Remote Participation", 4-8 June 2007, Inuyama, Japan11/28 Simple PC cluster system does not work. Data should be migrated from DAQ PC to the long term data storage (DVD?). Where is the data? How to get it?

12. LHD Control and Data Y. Nagayama, et al.,6th IAEA-TM "Control, Data Acquisition, Remote Participation", 4-8 June 2007, Inuyama, Japan12/28 PC cluster system requires a index server. Data acquisition PCs write the information of data to the relational data base in the index server. Clients access the index server and take the data as the index server instructs. Index server provides Where, What, and How, which are stored in the relational database (RDB). Index Server (Relational Database) where, what, how Kojima: P2-21

13. LHD Control and Data Y. Nagayama, et al.,6th IAEA-TM "Control, Data Acquisition, Remote Participation", 4-8 June 2007, Inuyama, Japan13/28 LABCOM system (2005 Model) Expansion of storage is limited due to: –Migration time of 3 layers storages –Too many servers, because each RAID has each server. Acquired data is compressed by the DAQ-PC, and migrates to RAIDs. Data in RAIDs migrates to Jukeboxes every night. Place of data is registered in the relational database in the index server.

14. LHD Control and Data Y. Nagayama, et al.,6th IAEA-TM "Control, Data Acquisition, Remote Participation", 4-8 June 2007, Inuyama, Japan14/28 Distributed Mass Storage System (MSS) using Storage Area Network (SAN) with Fibre-Channel (FC) switch FC-SAN enhances the flexibility of the data server. –A few servers can control many RAIDs. –Data migration from RAID to Jukebox is fast. Kojima: P2-21

15. LHD Control and Data Y. Nagayama, et al.,6th IAEA-TM "Control, Data Acquisition, Remote Participation", 4-8 June 2007, Inuyama, Japan15/28 LABCOM system (2007 Model) Distributed Mass Storage System on Fibre-Channel Storage Area Network Compression: ZLIB (1-D data), JPEG-LS(2-D data) Free software: LINUX (from Windows), PostgreSQL (from ObjectStore), DAQ Box: a small PC without disk and fan (from Server PC) Compact timing demodulator made of FPGA (from VME) Nakanishi: P2-20 Kojima: P2-21 Ohsuna: P2-15 Imazu OLD

16. LHD Control and Data Y. Nagayama, et al.,6th IAEA-TM "Control, Data Acquisition, Remote Participation", 4-8 June 2007, Inuyama, Japan16/28 Real time data acquisition and monitoring Data sampled with WE7000 or cPCI are stored in the memory block. Thinned data stream are sent to WEB browser to monitor in real time. Sliced full data set can be taken after the plasma shot. H. Nakanishi K. Emoto M. Kojima M. Ohsuna S. Imazu M. Yoshida Redraw every 0.1sec request 80MB/s

17. LHD Control and Data Y. Nagayama, et al.,6th IAEA-TM "Control, Data Acquisition, Remote Participation", 4-8 June 2007, Inuyama, Japan17/28 Progress of data acquisition LABCOM system takes LHD data of 90GB/shot. LABCOM system will be extended to the ITER level (1000GB/shot). Nakanishi: P2-20 Kojima: P2-21 Ohsuna: P2-15

18. LHD Control and Data Y. Nagayama, et al.,6th IAEA-TM "Control, Data Acquisition, Remote Participation", 4-8 June 2007, Inuyama, Japan18/28 NIFS serves to 450 collaborators. Collaborator’s lord should be reduced. To serve collaborators is challenging: 1.Easy tools to view and analyze data 2.WEB GUI of supercomputer 3.Remote participation system (Virtual Laboratory) SNET Japanese Virtual Laboratory for Fusion Tsuda: O9-1 Rokkasho site

19. LHD Control and Data Y. Nagayama, et al.,6th IAEA-TM "Control, Data Acquisition, Remote Participation", 4-8 June 2007, Inuyama, Japan19/28 Collaborators need easy access. A calculation server “Egcalc” provides easy data handling system. –Collaborators use standard software “X-window”. Client Software Index Server Original Codes (Fortran, C, PV- Wave, IDL) Client Software Standard Viewer X-window NIFS User’s PC Collaborator’s PC “Egcalc” LABCOM raw data server Index Server MSS LABCOM raw data server Collaborator’s effort should be minimized Installation of LHD soft wares Learning LHD computer system MSS Emoto: O5-4

20. LHD Control and Data Y. Nagayama, et al.,6th IAEA-TM "Control, Data Acquisition, Remote Participation", 4-8 June 2007, Inuyama, Japan20/28 GUI Browsers of LHD Data in X-window No software but X-window is required in user’s PC. GLABCOMV: Viewer of Raw data S. Inagaki M. Yoshida C. Iwata CHRONOUS : Viewer of Physics data GLABCOMV: Fortran95 code. Fast enough to view raw data. CHRONOUS: PERL+GRACE. Easy artwork to make viewgraphs.

21. LHD Control and Data Y. Nagayama, et al.,6th IAEA-TM "Control, Data Acquisition, Remote Participation", 4-8 June 2007, Inuyama, Japan21/28 High level data analysis system with WEB High level computer codes can be used with the WEB browser. Using the secure shell (SSH), the job is submitted to the supercomputer. Using the portable batch system (PBS), batch jobs are managed in PC cluster. Noticed by e-mail, user takes the result from calculation server. Emoto: O5-4 Data viewers on X-window GLABCOMV CHRONOUS

22. LHD Control and Data Y. Nagayama, et al.,6th IAEA-TM "Control, Data Acquisition, Remote Participation", 4-8 June 2007, Inuyama, Japan22/28 LHD Relational Database on WEB K. Emoto M. Yoshida Search key input Excel Table Output Select Display Items WEB address Link to Video & Waveform Timing of NBI, ICH Pellet Gas puff LHD shots can be searched on the WEB site using relational database system (PostgreSQL).

23. LHD Control and Data Y. Nagayama, et al.,6th IAEA-TM "Control, Data Acquisition, Remote Participation", 4-8 June 2007, Inuyama, Japan23/28 WEB calculator of LHD field lines on PC Cluster T. Watanabe M. Emoto H. Yoshida WEB browser Results Users can easily calculate LHD field line trace with WEB like “Internet shopping”. The result, which is heavy, is taken by FTP from “Egcalc” to user’s PC. e-mail configuration Coil current is calculated.

24. LHD Control and Data Y. Nagayama, et al.,6th IAEA-TM "Control, Data Acquisition, Remote Participation", 4-8 June 2007, Inuyama, Japan24/28 WEB GUI of transport analysis code on supercomputer Physicists can operate a transport code “PROCTER”, which uses PERL to manage Fortran codes on supercomputer. Both input data and results can be seen on WEB. Emoto: O5-4 M. Emoto H. Funaba S. Murakami WEB browser Results

25. LHD Control and Data Y. Nagayama, et al.,6th IAEA-TM "Control, Data Acquisition, Remote Participation", 4-8 June 2007, Inuyama, Japan25/28 Japanese Virtual Laboratory for Fusion Remote station is a LHD control room. KASTEC Kyushu University Diagnostic Control Client at Kyushu University A. Mase SUPER-SINET In the remote station at Kyushu Univ, they can operate a LHD diagnostic device “USR” and participate the LHD experiment. Tsuda: O9-1

26. LHD Control and Data Y. Nagayama, et al.,6th IAEA-TM "Control, Data Acquisition, Remote Participation", 4-8 June 2007, Inuyama, Japan26/28 Japanese Virtual Laboratory for Fusion Using the multi protocol label switching-virtual private network (MPLS-VPN) technology on SINET3, a virtual closed network is constructed. Tsuda: O9-1 Urushidani: O3-1 Yamamoto: P1-38

27. LHD Control and Data Y. Nagayama, et al.,6th IAEA-TM "Control, Data Acquisition, Remote Participation", 4-8 June 2007, Inuyama, Japan27/28 World Fusion Virtual Laboratory: from LHD to ITER Technology of Japanese Virtual Laboratory for Fusion will be useful to construct the ITER remote participation center. ITER ITER Remote participation center （ Rokkasho site ） Urushidani: O3-1 Yamamoto: P1-38

28. LHD Control and Data Y. Nagayama, et al.,6th IAEA-TM "Control, Data Acquisition, Remote Participation", 4-8 June 2007, Inuyama, Japan28/28 Summary Plasma control in LHD: –Steady state operation (~1 hours). –High density core plasma (~10 21 m -3 ). LABCOM: PC cluster based data acquisition system –70 data acquisition PC, ~100 GB/shot –Index server (relational database) manages data in PC-cluster. –Fibre-Channel Storage Area Network for the Mass Storage System. High level data analysis system: for collaborators –GUI data viewers on X-window –Real time data monitor on WEB –WEB for super-computing Japanese Fusion Virtual Laboratory: –Closed network using the multi protocol label switching-virtual private network (MPLS-VPN) technology –LHD remote participation and supercomputing