TJ-II:Turbulence and flow measured at the 3/2 magnetic island using Doppler reflectometry
Experimental campaign
Spring 2022
Proposal title
Turbulence and flow measured at the 3/2 magnetic island using Doppler reflectometry
Name and affiliation of proponent
T. Estrada (1), E. Ascasíbar
(1) https://orcid.org/0000-0001-6205-2656
Details of contact person at LNF
N/A
Description of the activity
The impact of magnetic island on turbulence and flows has been studied in different fusion devices finding differences that depend, among other parameters, on the island width. A vortex-like flow has been measured at large magnetic islands in several devices (e.g. LHD [1] and TJ-II [2]). Narrower islands however show a different flow pattern without signatures of flow reversal at the island O-point [1, 3]. These observations are qualitatively reproduced by gyrokinetic simulations [4]. Regarding the impact on the turbulence, a turbulence reduction associated to the island is found ......
[1] K. Ida et al.,
[2] T. Estrada et al.,
[3] T. Estrada et al.,
[4] A. Bañón-Navarro et al.,
International or National funding project or entity
Include funding here (grants, national plans)
Description of required resources
Required resources:
- Number of plasma discharges or days of operation:
- Essential diagnostic systems:
- Type of plasmas (heating configuration):
- Specific requirements on wall conditioning if any:
- External users: need a local computer account for data access: yes/no
- Any external equipment to be integrated? Provide description and integration needs:
Preferred dates and degree of flexibility
Preferred dates: (format dd-mm-yyyy)
References