R 1 -2 Control Data Acquisition Data Analysis

R 1 -2 Control, Data Acquisition, Data Analysis and Remote Participation LHD Refrigerator in LHD building compressor LHD Control and Data for liquid He Supercomputer building Office Buildings Y. Nagayama LHD Control building Guest House Baseball park Building for Diagnostics Development Tennis court on behalf of LHD group National Institute for Fusion Science (NIFS), NIFS site: 470, 000 m 2 322 -6 Oroshi, Toki 509 -5292, Japan Remote Participation", 4 -8 June 2007, Inuyama, Japan Y. Nagayama, et 3/19/2018 6 th IAEA-TM "Control, Data Acquisition, 1/28 1

Co-authors LHD Control and Data Related Presentations Control of Plasma/Device – Saito: P 1 -14 – Ito: P 1 -15 – Kasahara: P 1 -16 – Kubo: P 1 -17 – Chikaraishi: P 1 -18 – Miyazawa: P 1 -19 Data Acquisition/Database – Takahashi: P 2 -14 – Ohsuna: P 2 -15 – Nakanishi: P 2 -20 – Kojima: P 2 -21 Data Analysis – Emoto: O 5 -4 Fast Network/Remote Participation – Yamamoto: P 1 -38 – Tsuda: O 9 -1 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. Y. Nagayama, et 6 th IAEA-TM "Control, Data Acquisition, Remote Participation", 4 -8 June 2007, Inuyama, Japan 2

Outline LHD Control and Data • LHD • Control – Steady state – high desity • Data acquisition – PC cluster (90 GB/shot) – MSS • Data analysis – GUI – Web browser of Supercomputer • Remote Participation – Japanese Fusion Virtual Laboratory Y. Nagayama, et 3/19/2018 6 th IAEA-TM "Control, Data Acquisition, Remote Participation", 4 -8 June 2007, Inuyama, Japan 3/28 3

Large Helical Device (LHD) is a steady sate machine. LHD Control and Data • • 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. Magnetic field Flux surfaces Cross sections of LHD Y. Nagayama, et 6 th IAEA-TM "Control, Data Acquisition, Remote Participation", 4 -8 June 2007, Inuyama, Japan 4

Objective of LHD is to clarify physics of fusion relevant plasma in steady state. LHD Control and Data 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: • Ti 0=5 ke. V (ne=1. 2 x 1019 m-3) • Te 0=10 ke. V (ne=0. 5 x 1019 m-3) • beta=5% • ne 0=1021 m-3 (Te 0=0. 4 ke. V) • Wp=1. 44 MJ • Tpulse=3, 268 sec. (PICH+ECH=0. 5 MW, Wheat=1. 6 GJ) Y. Nagayama, et 6 th IAEA-TM "Control, Data Acquisition, Remote Participation", 4 -8 June 2007, Inuyama, Japan 5

Plasma Production for 3268 sec with ICH LHD Control and Data Kasahara: P 1 -16 • Steady state plasma is maintained mainly by ICH. • Total input energy is 1. 6 GJ (world record). • Magnetic axis is swung (3. 65 m

Control of superconducting magnets, plasma position, ECH/ICRF heating and density in LHD Control and Data Kubo: P 1 -17 Saito: P 1 -14 Kasahara: P 116 Chikaraishi: P 1 -18 Miyazawa: P 1 -19 Y. Nagayama, et 6 th IAEA-TM "Control, Data Acquisition, Remote Participation", 4 -8 June 2007, Inuyama, Japan 7

Liquid impedance matching system of ICRF Heating in LHD Control and Data • Four antennas are connected to RF generators (38. 47 MHz, 0. 5 MWx 4, 1 hour). Saito: P 1 -14 Kasahara: P 1 -16 Y. Nagayama, et • Feedback control of the liquid impedance matching system reduces reflected power drastically (fro 70% to 2%). 6 th IAEA-TM "Control, Data Acquisition, Remote Participation", 4 -8 June 2007, Inuyama, Japan 8

Diffusion barrier made with H 2 pellet Injection 1021 m-3 plasma is obtained! LHD Control and Data H 2 ice pellet It’s a miracle! • Why no disruption nor the radiation collapse takes place? – LHD plasma may expel impurities. Sakamoto Y. Nagayama, et 6 th IAEA-TM "Control, Data Acquisition, Remote Participation", 4 -8 June 2007, Inuyama, Japan 9

Growing number of diagnostics requires the PC cluster technology for a data acquisition system LHD Control and Data 2005 for Short pulse DAQ for Steady state DAQ • PC cluster system (LABCOM system) has benefits – Cost effective – Flexible • Key technology of PC cluster system: – Data management – Maintenance Y. Nagayama, et Nakanishi: P 2 -20 Kojima: P 2 -21 Ohsuna: P 2 -15 6 th IAEA-TM "Control, Data Acquisition, Remote Participation", 4 -8 June 2007, Inuyama, Japan 10

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

PC cluster system requires a index server. LHD Control and Data • Index server provides Where, What, and How, which are stored in the relational database (RDB). Kojima: P 2 -21 Index Server (Relational Database) where, what, how • • 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. Y. Nagayama, et 6 th IAEA-TM "Control, Data Acquisition, Remote Participation", 4 -8 June 2007, Inuyama, Japan 12

LABCOM system (2005 Model) LHD Control and Data • 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. • Expansion of storage is limited due to: – Migration time of 3 layers storages – Too many servers, because each RAID has each server. Y. Nagayama, et 6 th IAEA-TM "Control, Data Acquisition, Remote Participation", 4 -8 June 2007, Inuyama, Japan 13

Distributed Mass Storage System (MSS) using Storage Area Network (SAN) with Fibre-Channel (FC) switch LHD Control and Data Kojima: P 2 -21 • FC-SAN enhances the flexibility of the data server. – A few servers can control many RAIDs. – Data migration from RAID to Jukebox is fast. Y. Nagayama, et 6 th IAEA-TM "Control, Data Acquisition, Remote Participation", 4 -8 June 2007, Inuyama, Japan 14

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

Real time data acquisition and monitoring LHD Control and Data • • • Data sampled with WE 7000 or c. PCI 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. 80 MB/s Redraw every 0. 1 sec request H. Nakanishi K. Emoto M. Kojima M. Ohsuna S. Imazu M. Yoshida Y. Nagayama, et 6 th IAEA-TM "Control, Data Acquisition, Remote Participation", 4 -8 June 2007, Inuyama, Japan 16

Progress of data acquisition LHD Control and Data Nakanishi: P 2 -20 Kojima: P 2 -21 Ohsuna: P 2 -15 • • LABCOM system takes LHD data of 90 GB/shot. LABCOM system will be extended to the ITER level (1000 GB/shot). Y. Nagayama, et 6 th IAEA-TM "Control, Data Acquisition, Remote Participation", 4 -8 June 2007, Inuyama, Japan 17

NIFS serves to 450 collaborators. LHD Control and Data • • 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) Rokkasho site SNET Japanese Virtual Laboratory for Fusion Y. Nagayama, et Tsuda: O 9 -1 6 th IAEA-TM "Control, Data Acquisition, Remote Participation", 4 -8 June 2007, Inuyama, Japan 18

Collaborators need easy access. LHD Control and Data Collaborator’s effort should be minimized • Installation of LHD soft wares • Learning LHD computer system NIFS User’s PC Client Software Index Server Original Codes (Fortran, C, PVWave, IDL) MSS LABCOM raw data server Collaborator’s PC X-window “Egcalc” Client Software Index Server Standard Viewer MSS LABCOM raw data server • A calculation server “Egcalc” provides easy data handling system. – Collaborators use standard software “X-window”. Y. Nagayama, et Emoto: O 5 -4 6 th IAEA-TM "Control, Data Acquisition, Remote Participation", 4 -8 June 2007, Inuyama, Japan 19

GUI Browsers of LHD Data in X-window No software but X-window is required in user’s PC. LHD Control and Data GLABCOMV: Viewer of Raw data CHRONOUS : Viewer of Physics data • GLABCOMV: Fortran 95 code. Fast enough to view raw data. • CHRONOUS: PERL+GRACE. Easy artwork to make viewgraphs. Y. Nagayama, et S. Inagaki M. Yoshida C. Iwata 6 th IAEA-TM "Control, Data Acquisition, Remote Participation", 4 -8 June 2007, Inuyama, Japan 20

High level data analysis system with WEB LHD Control and Data viewers on X-window • GLABCOMV • CHRONOUS Emoto: O 5 -4 • • 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. Y. Nagayama, et 6 th IAEA-TM "Control, Data Acquisition, Remote Participation", 4 -8 June 2007, Inuyama, Japan 21

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

WEB calculator of LHD field lines on PC Cluster LHD Control and Data WEB browser Results e-mail configuration Coil current is calculated. • 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. Y. Nagayama, et T. Watanabe M. Emoto H. Yoshida 6 th IAEA-TM "Control, Data Acquisition, Remote Participation", 4 -8 June 2007, Inuyama, Japan 23

WEB GUI of transport analysis code on supercomputer LHD Control and Data Emoto: O 5 -4 WEB browser • 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. Results M. Emoto H. Funaba S. Murakami Y. Nagayama, et 6 th IAEA-TM "Control, Data Acquisition, Remote Participation", 4 -8 June 2007, Inuyama, Japan 24

Japanese Virtual Laboratory for Fusion Remote station is a LHD control room. LHD Control and Data • In the remote station at Kyushu Univ, they can operate a LHD diagnostic device “USR” and participate the LHD experiment. Kyushu University KASTEC National Institute for Fusion Science SUPER-SINET Control Room Diagnostic Control Server Diagnostic Control Client GPIB Main Building USR System Function Generator 1 F Shielded Box Impulse Generator Power Supply Sampling Scope Trigger Waveguide Low Noise Amplifier To Plasma Receiver A. Mase Tsuda: O 9 -1 Y. Nagayama, et at Kyushu University Transmitter 2 F Shield Box 6 th IAEA-TM "Control, Data Acquisition, Remote Participation", 4 -8 June 2007, Inuyama, Japan 25

Japanese Virtual Laboratory for Fusion LHD Control and Data • Using the multi protocol label switching-virtual private network (MPLS-VPN) technology on SINET 3, a virtual closed network is constructed. Y. Nagayama, et Tsuda: O 9 -1 Urushidani: O 3 -1 Yamamoto: P 1 -38 6 th IAEA-TM "Control, Data Acquisition, Remote Participation", 4 -8 June 2007, Inuyama, Japan 26

World Fusion Virtual Laboratory: from LHD to ITER LHD Control and Data • Technology of Japanese Virtual Laboratory for Fusion will be useful to construct the ITER remote participation center. ITER Remote participation center （Rokkasho site） ITER Urushidani: O 3 -1 Yamamoto: P 1 -38 Y. Nagayama, et 6 th IAEA-TM "Control, Data Acquisition, Remote Participation", 4 -8 June 2007, Inuyama, Japan 27

Summary LHD Control and Data • Plasma control in LHD: – Steady state operation (~1 hours). – High density core plasma (~1021 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 Y. Nagayama, et 6 th IAEA-TM "Control, Data Acquisition, Remote Participation", 4 -8 June 2007, Inuyama, Japan 28