NDLI: Enhancement of the ASDEX upgrade real-time plasma position reflectometry diagnostic

Content Provider	IEEE Xplore Digital Library
Author	Santos, J.M. Santos, G.S. Zilker, M. Guimarais, L. Rapson, C. Treutterer, W. Goncalves, B.
Copyright Year	2014
Description	Author affiliation: Inst. de Plasmas e Fusao Nucl., Univ. de Lisboa, Lisbon, Portugal (Santos, J.M.; Santos, G.S.; Guimarais, L.; Goncalves, B.) \|\| Max-Planck-Inst. fur Plasmaphysik, EURATOM Assoc., Garching, Germany (Zilker, M.; Rapson, C.; Treutterer, W.)
Abstract	Microwave O-mode reflectometry is a diagnostic technique that will play an important supplementary role for plasma position control for ITER and foreseeably for DEMO. Density profiles from reflectometry will provide, at high temporal resolutions, estimates of the gap between the plasma magnetic separatrix and the tokamak vessel walls. These estimates will be used to detect and correct drifts in the magnetic gap measurements, the primary measurements used for plasma position and shape control. The feasibility of this alternative feedback control approach was demonstrated in 2011 on ASDEX Upgrade (AUG) [1], where the reflectometry gap estimate actually replaced the corresponding magnetic measurement in the position control loop. Presently, the AUG's real-time (RT) reflectometry diagnostic is being upgraded to improve not only its density range coverage but also its acquisition and RT data processing performance. The diagnostic is now capable of acquiring a total of 16 channels (previously 8) from both the high (HFS) and low field side (LFS) reflectometers, some of which are used in the RT density profile and separatrix gap calculations. The up-to-date characteristics of the new diagnostic server allow the implementation of new operation modes that exploit the very high data throughput (> 1.2 GB/s) of each of the two used acquisition boards. The ability to acquire data at rates higher than the control measurement rate (1 ms), for more detailed offline data processing, enables diagnostic operation in a mode identical to the one planned for the ITER plasma position reflectometer (PPR). Herein we will present the goals and characteristics of the newly upgraded AUG RT reflectometry diagnostic.
Starting Page	1
Ending Page	3
File Size	113732
Page Count	3
File Format	PDF
e-ISBN	9781479936595
DOI	10.1109/RTC.2014.7097429
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-05-26
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Plasmas Data acquisition Plasma measurements Magnetic separation Servers Hardware Real-time systems
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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