TJ-II:Radiation asymmetries and potential variations - Revision history

Jose.regana at 13:51, 17 October 2018

2018-10-17T13:51:57Z

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	== Experimental campaign ==		== Experimental campaign ==
	2018 ~~Spring~~		2018 Autumn

	== Proposal title ==		== Proposal title ==
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	[[Category:TJ-II internal documents]]		[[Category:TJ-II internal documents]]
	[[Category:TJ-II experimental proposals ~~Spring~~ 2018]]		[[Category:TJ-II experimental proposals Autumn 2018]]

Admin at 09:22, 27 March 2018

2018-03-27T09:22:25Z

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	== References ==		== References ==
	<references />		<references />

			<hr>
			[[TJ-II:Experimental proposals\|Back to list of experimental proposals]]

	[[Category:TJ-II internal documents]]		[[Category:TJ-II internal documents]]
	[[Category:TJ-II experimental proposals Spring 2018]]		[[Category:TJ-II experimental proposals Spring 2018]]

Admin at 09:21, 27 March 2018

2018-03-27T09:21:10Z

← Older revision		Revision as of 11:21, 27 March 2018
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	== References ==		== References ==
	<references />		<references />

			[[Category:TJ-II internal documents]]
			[[Category:TJ-II experimental proposals Spring 2018]]

Jose.regana: /* Name and affiliation of proponents */

2018-03-23T14:50:21Z

Name and affiliation of proponents

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	== Name and affiliation of proponents ==		== Name and affiliation of proponents ==
	José M García Regaña<sup>1</sup>, D. Carralero<sup>1</sup>, M. A. Ochando<sup>1</sup>, T. Estrada<sup>1</sup>, F. Medina<sup>1</sup>, José Luis Velasco<sup>1</sup>, J. A. Alonso <sup>1</sup>, B. López-Miranda, D. Tafalla and TJ-II team.		José M García Regaña<sup>1</sup>, D. Carralero<sup>1</sup>, M. A. Ochando<sup>1</sup>, T. Estrada<sup>1</sup>, M. Ezzat<sup>1</sup>, F. Medina<sup>1</sup>, José Luis Velasco<sup>1</sup>, J. A. Alonso <sup>1</sup>, B. López-Miranda, D. Tafalla and TJ-II team.

	== Details of contact person at LNF (if applicable) ==		== Details of contact person at LNF (if applicable) ==

Jose.regana: /* Description of required resources */

2018-03-07T10:55:09Z

Description of required resources

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	* The time evolution of the plasma emissivity along the available lines of sight of the tomography camera systems.		* The time evolution of the plasma emissivity along the available lines of sight of the tomography camera systems.
	* The ~~time evolution of~~ the ~~plasma floating potential at~~ the ~~outer core region (<math>r/a\sim 0.9</math>~~).		* The radial electric field profile using Doppler reflectometry (DR), measured on the right and left side (respect to the normal incidence angle) of the DR measurement plane.
	* The time evolution of the line-averaged density <math>\left<n_e(t)\right></math> with interferometry.		* The time evolution of the line-averaged density <math>\left<n_e(t)\right></math> with interferometry.
	* The radial profiles of electron density <math>n_{e}(r, t_0)</math> and temperature at one time instant <math>t_0</math> using Thomson Scattering (TS).		* The radial profiles of electron density <math>n_{e}(r, t_0)</math> and temperature at one time instant <math>t_0</math> using Thomson Scattering (TS).
	* The time evolution of the electron temperature profile <math>T_{e}(r,t)</math> with Electron Cyclotron Emission (ECE), when available, calibrated with TS.		* The time evolution of the electron temperature profile <math>T_{e}(r,t)</math> with Electron Cyclotron Emission (ECE), when available, calibrated with TS.
	* When possible the time evolution of the main ion temperature profile <math>T_{i}(r,t)</math> with the CNPA are four positions that are representative of the inner and mid-core and mid- and far edge.		* When possible the time evolution of the main ion temperature profile <math>T_{i}(r,t)</math> with the CNPA are four positions that are representative of the inner and mid-core and mid- and far edge.
	* The time evolution of the radial electric field at the mid-outer resion (<math>r/a\sim 0.7-0.8</math>) with reflectometry.

	== Preferred dates and degree of flexibility ==		== Preferred dates and degree of flexibility ==

Jose.regana: /* Description of the activity, including motivation/objectives and experience of the proponent (typically one-two pages) */

2018-03-07T09:44:30Z

Description of the activity, including motivation/objectives and experience of the proponent (typically one-two pages)

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	with <math>\theta</math> and <math>\phi</math> the poloidal and toroidal angular coordinates.		with <math>\theta</math> and <math>\phi</math> the poloidal and toroidal angular coordinates.
	When this is taken into account the equilibrium density of the different species ''a'' present in the plasma		When this is taken into account the equilibrium density of the different species ''a'' present in the plasma
	varies ~~according to their adiabatic response and can be written as:~~ <math>n_{a0}=~~\left<n\right>~~\exp\left(-Z_{a}e\Phi_1/T_{a}\right)</math>~~, with~~		varies accordingly since <math>n_{a0}=n_a0(r)\exp\left(-Z_{a}e\Phi_1/T_{a}\right)</math>.
	~~<math>\left<...\right></math> the flux-surface-average~~. In TJ-II plasmas experiments and simulations		This can introduce a strong density variation of impurities due to their high charge state. In TJ-II plasmas experiments and simulations
	<ref>M. A. Pedrosa ''et al.'', ''Electrostatic potential variations along flux surfaces in stellarators'' Nucl. Fusion '''55''' 052001 (2015) </ref>		<ref>M. A. Pedrosa ''et al.'', ''Electrostatic potential variations along flux surfaces in stellarators'' Nucl. Fusion '''55''' 052001 (2015) </ref>
	<ref>J. M. Garcı́a-Regaña ''et al.'' ''Electrostatic potential variation on the flux surface and its impact on impurity transport'' Nuclear Fusion '''57''' 056004 (2017)</ref>		<ref>J. M. Garcı́a-Regaña ''et al.'' ''Electrostatic potential variation on the flux surface and its impact on impurity transport'' Nuclear Fusion '''57''' 056004 (2017)</ref>

Jose.regana: /* Description of required resources */

2018-03-07T09:32:41Z

Description of required resources

← Older revision		Revision as of 11:32, 7 March 2018
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	* The radial profiles of electron density <math>n_{e}(r, t_0)</math> and temperature at one time instant <math>t_0</math> using Thomson Scattering (TS).		* The radial profiles of electron density <math>n_{e}(r, t_0)</math> and temperature at one time instant <math>t_0</math> using Thomson Scattering (TS).
	* The time evolution of the electron temperature profile <math>T_{e}(r,t)</math> with Electron Cyclotron Emission (ECE), when available, calibrated with TS.		* The time evolution of the electron temperature profile <math>T_{e}(r,t)</math> with Electron Cyclotron Emission (ECE), when available, calibrated with TS.
	* When possible the time evolution of the main ion temperature profile <math>T_{e}(r,t)</math> with the CNPA are four positions that are representative of the inner and mid-core and mid- and far edge.		* When possible the time evolution of the main ion temperature profile <math>T_{i}(r,t)</math> with the CNPA are four positions that are representative of the inner and mid-core and mid- and far edge.
	* The time evolution of the radial electric field at the mid-outer resion (<math>r/a\sim 0.7-0.8</math>) with reflectometry.		* The time evolution of the radial electric field at the mid-outer resion (<math>r/a\sim 0.7-0.8</math>) with reflectometry.

Jose.regana: /* Name and affiliation of proponents */

2018-03-07T09:31:56Z

Name and affiliation of proponents

← Older revision		Revision as of 11:31, 7 March 2018
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	== Name and affiliation of proponents ==		== Name and affiliation of proponents ==
	José M García Regaña<sup>1</sup>, D. Carralero<sup>1</sup>, M. A. Ochando<sup>1</sup>, T. Estrada<sup>1</sup>, F. Medina<sup>1</sup>, José Luis Velasco<sup>1</sup>, J. A. Alonso <sup>1</sup> and TJ-II team.		José M García Regaña<sup>1</sup>, D. Carralero<sup>1</sup>, M. A. Ochando<sup>1</sup>, T. Estrada<sup>1</sup>, F. Medina<sup>1</sup>, José Luis Velasco<sup>1</sup>, J. A. Alonso <sup>1</sup>, B. López-Miranda, D. Tafalla and TJ-II team.

	== Details of contact person at LNF (if applicable) ==		== Details of contact person at LNF (if applicable) ==

Jose.regana: /* Description of required resources */

2018-03-07T09:31:31Z

Description of required resources

← Older revision		Revision as of 11:31, 7 March 2018
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	* When possible the time evolution of the main ion temperature profile <math>T_{e}(r,t)</math> with the CNPA are four positions that are representative of the inner and mid-core and mid- and far edge.		* When possible the time evolution of the main ion temperature profile <math>T_{e}(r,t)</math> with the CNPA are four positions that are representative of the inner and mid-core and mid- and far edge.
	* The time evolution of the radial electric field at the mid-outer resion (<math>r/a\sim 0.7-0.8</math>) with reflectometry.		* The time evolution of the radial electric field at the mid-outer resion (<math>r/a\sim 0.7-0.8</math>) with reflectometry.
	* The time evolution of the electrostatic potential in the mid-outer region <math>\Phi(r/a\sim0.7,t)</math> with the double Heavy Ion Beam Probe (HIBP).

	== Preferred dates and degree of flexibility ==		== Preferred dates and degree of flexibility ==

Jose.regana: /* Description of required resources */

2018-03-07T08:32:36Z

Description of required resources

← Older revision		Revision as of 10:32, 7 March 2018
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	*Accessing different absolute values and regimes <math>E_{r}</math> is essential. These regimes can be roughly referred to as "high ion root <math>E_{r}</math>", "low ion root <math>E_{r}</math>" and the same for electron root conditions. 2 discharges for each regime is necessitated in order to characterize <math>E_{r}</math> at different positions over the same flux surface.		*Accessing different absolute values and regimes <math>E_{r}</math> is essential. These regimes can be roughly referred to as "high ion root <math>E_{r}</math>", "low ion root <math>E_{r}</math>" and the same for electron root conditions. 2 discharges for each regime is necessitated in order to characterize <math>E_{r}</math> at different positions over the same flux surface.
	*Reproducing some of these regimes in two different configurations (high-iota and standard), where changes in the the sign of <math>E_{r}^{Left}-E_{r}^{Right}</math> have been observed, is planned.		*Reproducing some of these regimes in two different configurations (high-iota and standard), where changes in the the sign of <math>E_{r}^{Left}-E_{r}^{Right}</math> have been observed, is planned.
	*Good stationarity of plasma parameters at the instant where the impurities are injected is required in order to extract the stationary background emissivity from that produced by the injected impurity. ~~Hence the study shall preferably be perform in ECRH plasmas.~~		*Good stationarity of plasma parameters at the instant where the impurities are injected is required in order to extract the stationary background emissivity from that produced by the injected impurity.