NDLI: Effects of operating parameters on the beam species of DIII-D neutral beam ion sources

Content Provider	IEEE Xplore Digital Library
Author	Hong, R. Chiu, H.K.
Copyright Year	2002
Description	Author affiliation: Gen. Atomics, San Diego, CA, USA (Hong, R.; Chiu, H.K.)
Abstract	The DIII-D fusion science research facility employs positive-ion based neutral beam ion sources for plasma heating and current drive experiments. Ion species produced inside the arc chamber of an ion source determine the composition of the neutral beams injected into the plasma and in turn affect the energy deposition along the cross section of the plasma. Arc chamber design and operation schemes are the predominant factors in the ion species mix when an arc discharge is produced inside the arc chamber. When deuterium gas is used for arc discharge three deuterium ion species (atomic D/sub 1//sup +/ and molecular D/sub 2//sup +/ and D/sub 3//sup +/) are produced in the arc chamber of the DIII-D neutral beam ion source. Atomic ion D/sub 1//sup +/ has the highest percentage of the three species, normally about 80% of ions produced. Measurements have shown that both D/sub 1//sup +/ and D/sub 2//sup +/ decrease slightly with lower arc power discharges. However, D/sub 3//sup +/ increases at a higher rate when arc power is reduced. Changing the fraction of the ion species can be beneficial to or meet the needs of some specific plasma experiments. An attempt to manipulate the ion species mix by changing the operating parameters of the arc chamber/ion source has been performed. These operating parameters include filament temperature, arc power, beam energy, and gas flow. Interesting results were obtained which show that arc power is the dominant factor for controlling the species mix. We were not able to significantly change the ion species mix by varying the operating parameters within the operation window when the ion source is operated at constant beam energy. However, the D/sub 3//sup +/ fraction increased by a factor of three when the ion source was operated at a much lower arc power (for 50 keV beam energy operation) than the higher arc power required for ion source operation with beam energy between 75 to 80 keV.
Starting Page	40
Ending Page	43
File Size	204089
Page Count	4
File Format	PDF
ISBN	0780370732
DOI	10.1109/FUSION.2002.1027637
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-01-25
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Ion beams Ion beam effects Ion sources Plasma sources Particle beams Arc discharges Deuterium Plasma temperature Nuclear and plasma sciences Heating
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

Development for extending the beam pulse length of the DIII-D neutral besm System

Measurement of electron temperature and density in the DIII-D neutral beam ion source arc chamber

Effects of operating parameters on the beam species of diii–d neutral beam ion sources.

Efficiency of arc discharge and beam extraction of the DIII-D neutral beam ion source

New conditioning procedures derived from operating experience with the common DIII-D neutral beam ion source

Beam species mix as a function of DIII-D neutral beam ion source operation parameters

Performance of a DIII-D Neutral Beam Ion Source with a New Accelerator Grid

Neutral beam shine-through power and its dependence on the line density of the DIII-D plasma

Beam species mix as a function of DIII-D neutral beam ion source operation parameters

Effects of operating parameters on the beam species of DIII-D neutral beam ion sources

Similar Documents

Development for extending the beam pulse length of the DIII-D neutral besm System

Measurement of electron temperature and density in the DIII-D neutral beam ion source arc chamber

Effects of operating parameters on the beam species of diii–d neutral beam ion sources.

Efficiency of arc discharge and beam extraction of the DIII-D neutral beam ion source

New conditioning procedures derived from operating experience with the common DIII-D neutral beam ion source

Beam species mix as a function of DIII-D neutral beam ion source operation parameters

Performance of a DIII-D Neutral Beam Ion Source with a New Accelerator Grid

Neutral beam shine-through power and its dependence on the line density of the DIII-D plasma

Beam species mix as a function of DIII-D neutral beam ion source operation parameters

Effects of operating parameters on the beam species of DIII-D neutral beam ion sources