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Flow measurements in the scrape-off layer of Alcator C-Mod using impurity plumes
| Content Provider | Semantic Scholar |
|---|---|
| Author | Gangadhara, Sanjay Labombard, Brian |
| Copyright Year | 2003 |
| Abstract | Accurate measurements of plasma flows in the scrape-off layer (SOL) are a necessary requirement for understanding the physics of tokamak edge plasmas. A system is being developed on Alcator C-Mod for inferring flows parallel (v 1 ) and perpendicular (v E×B ) to local magnetic field lines from impurity emission patterns ('plumes') generated by local gas injection. Carbon plumes are generated at variable location in the SOL by puffing deuterated ethylene gas (C 2 D 4 ) through the end of a reciprocating fast-scanning probe. Two intensified CCD cameras are used to record C -1 and C +2 emission patterns simultaneously from near-perpendicular views. Plumes are modeled using a Monte Carlo impurity transport code, from which values for the background flows may be extracted. The sensitivity of the plume structure is investigated for a number of code inputs, including radial electric field (E r ) and the neutral launch dynamics. Initial modeling results indicate discrepancies between values of v || and E r extracted from the plumes and measurements obtained from probe data. |
| Starting Page | 1167 |
| Ending Page | 1172 |
| Page Count | 6 |
| File Format | PDF HTM / HTML |
| DOI | 10.1016/S0022-3115(02)01515-5 |
| Volume Number | 313 |
| Alternate Webpage(s) | http://dspace.mit.edu/bitstream/handle/1721.1/94008/02ja008_full.pdf?sequence=1 |
| Alternate Webpage(s) | http://dspace.mit.edu/bitstream/handle/1721.1/94008/02ja008_full.pdf;jsessionid=9C1803BED40458CFAB3EBC48D68D21EC?sequence=1 |
| Alternate Webpage(s) | https://doi.org/10.1016/S0022-3115%2802%2901515-5 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
