PMID- 21198023
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20110415
LR  - 20110104
IS  - 1089-7623 (Electronic)
IS  - 0034-6748 (Linking)
VI  - 81
IP  - 12
DP  - 2010 Dec
TI  - Development of a digital integrator for the KSTAR device.
PG  - 123507
LID - 10.1063/1.3519303 [doi]
AB  - The development of an integrator for magnetic diagnostics becomes more important 
      as the pulse length of fusion devices gets longer and longer, especially for 
      present-day superconducting fusion devices. A small offset in the signal can 
      cause a significant drift in the integrator output for long pulse experiments. A 
      lock-in amplifying digital integrator has been developed for Wendelstein 7-X 
      (W7-X). It succeeds in suppressing the drift to a low value but requires about 
      100 ms for data processing. To shorten the data processing time, a Field 
      Programmable Gate Array (FPGA) built in the digitizer is utilized. Since there is 
      no need to transfer the data to an external computer, the integration can be done 
      in real time. The microprocessor built in the digitizer directly transfers the 
      data integrated in the internal FPGA into the reflective memory installed in the 
      same compact Peripheral Component Interconnect chassis. These features result in 
      a very compact system design. The design and the preliminary results of the 
      digital integrator will be presented.
FAU - Seo, Seong-Heon
AU  - Seo SH
AD  - National Fusion Research Institute, Daejeon 305-333, Korea. shseo@nfri.re.kr
FAU - Werner, Andreas
AU  - Werner A
FAU - Marquardt, M
AU  - Marquardt M
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Rev Sci Instrum
JT  - The Review of scientific instruments
JID - 0405571
EDAT- 2011/01/05 06:00
MHDA- 2011/01/05 06:01
CRDT- 2011/01/05 06:00
PHST- 2011/01/05 06:00 [entrez]
PHST- 2011/01/05 06:00 [pubmed]
PHST- 2011/01/05 06:01 [medline]
AID - 10.1063/1.3519303 [doi]
PST - ppublish
SO  - Rev Sci Instrum. 2010 Dec;81(12):123507. doi: 10.1063/1.3519303.