ICALEPCS2013 - List of Authors (Lee, T.G.)

Paper

Title

Page

Performance Improvement of KSTAR Networks for Long Distance Collaborations

423

J.S. Park, A.K. Bashir, D. Lee, S. Lee, T.G. Lee, S.W. Yun
NFRI, Daejon, Republic of Korea
B.S. Cho
KISTI, Daejeon, Republic of Korea

KSTAR (Korea Superconducting Tokamak Advanced Research) has completed its 5th campaign. Every year, it produces enormous amount of data that need to be forwarded to international collaborators shot by shot for run-time analysis. Analysis of one shot helps in deciding parameters for next shot. Many shots are conducted in a day, therefore, this communication need to be very efficient. Moreover, amount of KSTAR data and number of international collaborators are increasing every year. In presence of big data and various collaborators exists in all over the world, communicating at run-time will be a challenge. To meet this challenge, we need efficient ways of communications to transfer data. Therefore, in this paper, we will optimize paths among internal and external networks of KSTAR for efficient communication. We will also discuss transmission solutions for environment construction and evaluate performance for long distance collaborations.

Poster MOPPC133 [1.582 MB]

TUPPC057

New Development of EPICS-based Data Acquisition System for Electron Cyclotron Emission Diagnostics in KSTAR Tokamak

699

T.G. Lee, K.D. Lee, S. Lee, W.R. Lee, M.K. Park
NFRI, Daejon, Republic of Korea

Korea Superconducting Tokamak Advanced Research (KSTAR) will be operated in the 6nd campaign in 2013 after achievement of first plasma in 2008. Many diagnostic devices have been installed for measuring the various plasma properties in the KSTAR tokamak during the campaigns. From the first campaign, a data acquisition system of Electron Cyclotron Emission (ECE) Heterodyne Radiometer (HR) has been operated to measure the radial profile of electron temperature. The DAQ system at the beginning was developed with a VME-form factor digitizer in Linux OS platform. However, this configuration had some limitations that it could not acquire over 100,000 samples per second due to its unstable operation during the campaigns. In order to overcome these weak points, a new ECE HR DAQ system is under development with a cPCI-form factor in Linux OS platform and the main control application will be developed based on EPICS framework like other control systems installed in KSTAR. Besides solving the described problems main advantages of the new ECE HR DAQ system are capabilities of calculating plasma electron temperature during plasma shot and displaying it in run-time.

Poster TUPPC057 [1.286 MB]

Paper	Title	Page
MOPPC133	Performance Improvement of KSTAR Networks for Long Distance Collaborations	423
	J.S. Park, A.K. Bashir, D. Lee, S. Lee, T.G. Lee, S.W. Yun NFRI, Daejon, Republic of Korea B.S. Cho KISTI, Daejeon, Republic of Korea
	KSTAR (Korea Superconducting Tokamak Advanced Research) has completed its 5th campaign. Every year, it produces enormous amount of data that need to be forwarded to international collaborators shot by shot for run-time analysis. Analysis of one shot helps in deciding parameters for next shot. Many shots are conducted in a day, therefore, this communication need to be very efficient. Moreover, amount of KSTAR data and number of international collaborators are increasing every year. In presence of big data and various collaborators exists in all over the world, communicating at run-time will be a challenge. To meet this challenge, we need efficient ways of communications to transfer data. Therefore, in this paper, we will optimize paths among internal and external networks of KSTAR for efficient communication. We will also discuss transmission solutions for environment construction and evaluate performance for long distance collaborations.
	Poster MOPPC133 [1.582 MB]

TUPPC057	New Development of EPICS-based Data Acquisition System for Electron Cyclotron Emission Diagnostics in KSTAR Tokamak	699
	T.G. Lee, K.D. Lee, S. Lee, W.R. Lee, M.K. Park NFRI, Daejon, Republic of Korea
	Korea Superconducting Tokamak Advanced Research (KSTAR) will be operated in the 6nd campaign in 2013 after achievement of first plasma in 2008. Many diagnostic devices have been installed for measuring the various plasma properties in the KSTAR tokamak during the campaigns. From the first campaign, a data acquisition system of Electron Cyclotron Emission (ECE) Heterodyne Radiometer (HR) has been operated to measure the radial profile of electron temperature. The DAQ system at the beginning was developed with a VME-form factor digitizer in Linux OS platform. However, this configuration had some limitations that it could not acquire over 100,000 samples per second due to its unstable operation during the campaigns. In order to overcome these weak points, a new ECE HR DAQ system is under development with a cPCI-form factor in Linux OS platform and the main control application will be developed based on EPICS framework like other control systems installed in KSTAR. Besides solving the described problems main advantages of the new ECE HR DAQ system are capabilities of calculating plasma electron temperature during plasma shot and displaying it in run-time.
	Poster TUPPC057 [1.286 MB]