TJ-II:Interferometry - Revision history

Admin: Updated reference links

2018-04-03T12:12:03Z

Updated reference links

← Older revision		Revision as of 14:12, 3 April 2018
Line 18:		Line 18:
	The double wavelength heterodyne interferometer (CO<sub>2</sub>: 10.6 μm, NdYAG: 1.064 μm)		The double wavelength heterodyne interferometer (CO<sub>2</sub>: 10.6 μm, NdYAG: 1.064 μm)
	provides values of the plasma line integral density in scenarios with average densities ranging from a few times 10<sup>18</sup> m<sup>–3</sup> to more than 5×10<sup>19</sup> m<sup>–3</sup>. The results have been compared with those from the 2 mm (microwave) interferometer, obtaining an excellent agreement. Working with a final bandwidth of 4 kHz, a one pass line integral error level about ±2×10<sup>17</sup> m<sup>–2</sup> has been achieved.		provides values of the plasma line integral density in scenarios with average densities ranging from a few times 10<sup>18</sup> m<sup>–3</sup> to more than 5×10<sup>19</sup> m<sup>–3</sup>. The results have been compared with those from the 2 mm (microwave) interferometer, obtaining an excellent agreement. Working with a final bandwidth of 4 kHz, a one pass line integral error level about ±2×10<sup>17</sup> m<sup>–2</sup> has been achieved.
	<ref>~~[http://link.aip.org/link/?RSINAK/72/96/1~~ H. Lamela et al, ''Laser interferometric experiments for the TJ-II stellarator electron-density measurements'', Rev. Sci. Instrum. '''72''' (2001) 96]</ref>		<ref>H. Lamela et al, ''Laser interferometric experiments for the TJ-II stellarator electron-density measurements'', [[doi: 10.1063/1.1333040\|Rev. Sci. Instrum. '''72''' (2001) 96]]</ref>
	<ref>~~[http://link.aip.org/link/?RSINAK/75/3414/1~~ M. Sánchez at al, ''High resolution CO<sub>2</sub> interferometry on the TJ-II stellarator by using an ADC-based phase meter'', Rev. Sci. Instrum. '''75''' (2004) 3414]</ref>		<ref>M. Sánchez at al, ''High resolution CO<sub>2</sub> interferometry on the TJ-II stellarator by using an ADC-based phase meter'', [[doi:10.1063/1.1786638\|Rev. Sci. Instrum. '''75''' (2004) 3414]]</ref>
	<ref>~~[http://link.aip.org/link/?RSINAK/75/4671/1~~ P. Acedo et al, ''CO<sub>2</sub> (λ<sub>m</sub> = 10.6 μm) He–Ne (λ<sub>c</sub> = 633 nm) two-color laser interferometry for low and medium electron density measurements in the TJ-II Stellarator'', Rev. Sci. Instrum. '''75''', 11 (2004) 4671]</ref>		<ref>P. Acedo et al, ''CO<sub>2</sub> (λ<sub>m</sub> = 10.6 μm) He–Ne (λ<sub>c</sub> = 633 nm) two-color laser interferometry for low and medium electron density measurements in the TJ-II Stellarator'', [[doi:10.1063/1.1809283\|Rev. Sci. Instrum. '''75''', 11 (2004) 4671]]</ref>
	<ref>~~[http://link.aip.org/link/?APCPCS/993/187/1~~ M. Sánchez et al, ''Admissible Crosstalk Limits in a Two Colour Interferometers for Plasma Density Diagnostics. A Reduction Algorithm'', PLASMA 2007, AIP Conf. Proc. '''993''' (2008) 187-190]</ref>		<ref>M. Sánchez et al, ''Admissible Crosstalk Limits in a Two Colour Interferometers for Plasma Density Diagnostics. A Reduction Algorithm'', PLASMA 2007, [[doi:10.1063/1.2909105\|AIP Conf. Proc. '''993''' (2008) 187-190]]</ref>
	<ref>~~[http://link.aip.org/link/?RSINAK/79/10E713/1~~ P. Acedo et al, ''Calibration of a high spatial resolution laser two-color heterodyne interferometer for density profile measurements in the TJ-II stellarator'', Rev. Sci. Instrum. '''79''' (2008) 10E713]</ref>		<ref>P. Acedo et al, ''Calibration of a high spatial resolution laser two-color heterodyne interferometer for density profile measurements in the TJ-II stellarator'', [[doi:10.1063/1.2973326\|Rev. Sci. Instrum. '''79''' (2008) 10E713]]</ref>
	<ref>~~[http://dx.doi.org/10.1016/j.fusengdes.2010.03.036~~ L. Esteban, M. Sánchez, J.A. López, O. Nieto-Taladriz and J. Sánchez, ''Continuous plasma density measurement in TJ-II infrared interferometer—Advanced signal processing based on FPGAs'', Fus. Eng. Design '''85''', 3-4 (2010) 328]</ref>		<ref>L. Esteban, M. Sánchez, J.A. López, O. Nieto-Taladriz and J. Sánchez, ''Continuous plasma density measurement in TJ-II infrared interferometer—Advanced signal processing based on FPGAs'', [[doi:10.1016/j.fusengdes.2010.03.036\|Fus. Eng. Design '''85''', 3-4 (2010) 328]]</ref>
	<ref>~~[http://link.aip.org/link/rsinak/v81/i10/p10D517/s1~~ P. Pedreira, L. Esteban, A.R. Criado, P. Acedo, M. Sánchez, and J. Sánchez, ''Two color multichannel heterodyne interferometer set up for high spatial resolution electron density profile measurements in TJ-II'', Rev. Sci. Instrum. '''81''' (2010) 10D517]</ref>		<ref>P. Pedreira, L. Esteban, A.R. Criado, P. Acedo, M. Sánchez, and J. Sánchez, ''Two color multichannel heterodyne interferometer set up for high spatial resolution electron density profile measurements in TJ-II'', [[doi:10.1063/1.3475729\|Rev. Sci. Instrum. '''81''' (2010) 10D517]]</ref>
	The system is located in [[TJ-II:Sectors\|sector]] B1.		The system is located in [[TJ-II:Sectors\|sector]] B1.

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

Admin: Reverted edits by 182.23.159.34 (Talk) to last revision by Admin

2011-05-19T05:28:37Z

Reverted edits by 182.23.159.34 (Talk) to last revision by Admin

← Older revision		Revision as of 07:28, 19 May 2011
Line 27:		Line 27:
	The system is located in [[TJ-II:Sectors\|sector]] B1.		The system is located in [[TJ-II:Sectors\|sector]] B1.

	~~TYVM you've svoled all my problems~~		==References==
			<references />

182.23.159.34: /* References */

2011-05-19T03:34:57Z

References

← Older revision		Revision as of 05:34, 19 May 2011
Line 27:		Line 27:
	The system is located in [[TJ-II:Sectors\|sector]] B1.		The system is located in [[TJ-II:Sectors\|sector]] B1.

	~~==References==~~		TYVM you've svoled all my problems
	~~<references />~~

Admin: /* Two-colour interferometer */

2011-02-15T13:56:07Z

Two-colour interferometer

← Older revision		Revision as of 15:56, 15 February 2011
Line 23:		Line 23:
	<ref>[http://link.aip.org/link/?APCPCS/993/187/1 M. Sánchez et al, ''Admissible Crosstalk Limits in a Two Colour Interferometers for Plasma Density Diagnostics. A Reduction Algorithm'', PLASMA 2007, AIP Conf. Proc. '''993''' (2008) 187-190]</ref>		<ref>[http://link.aip.org/link/?APCPCS/993/187/1 M. Sánchez et al, ''Admissible Crosstalk Limits in a Two Colour Interferometers for Plasma Density Diagnostics. A Reduction Algorithm'', PLASMA 2007, AIP Conf. Proc. '''993''' (2008) 187-190]</ref>
	<ref>[http://link.aip.org/link/?RSINAK/79/10E713/1 P. Acedo et al, ''Calibration of a high spatial resolution laser two-color heterodyne interferometer for density profile measurements in the TJ-II stellarator'', Rev. Sci. Instrum. '''79''' (2008) 10E713]</ref>		<ref>[http://link.aip.org/link/?RSINAK/79/10E713/1 P. Acedo et al, ''Calibration of a high spatial resolution laser two-color heterodyne interferometer for density profile measurements in the TJ-II stellarator'', Rev. Sci. Instrum. '''79''' (2008) 10E713]</ref>
	<ref>[http://dx.doi.org/10.1016/j.fusengdes.2010.03.036 L. Esteban, M. Sánchez, J.A. López, O. Nieto-Taladriz and J. Sánchez, ''Continuous plasma density measurement in TJ-II infrared interferometer—Advanced signal processing based on FPGAs'', Fus. Eng. Design (2010) in ~~press~~]</ref>		<ref>[http://dx.doi.org/10.1016/j.fusengdes.2010.03.036 L. Esteban, M. Sánchez, J.A. López, O. Nieto-Taladriz and J. Sánchez, ''Continuous plasma density measurement in TJ-II infrared interferometer—Advanced signal processing based on FPGAs'', Fus. Eng. Design '''85''', 3-4 (2010) 328]</ref>
			<ref>[http://link.aip.org/link/rsinak/v81/i10/p10D517/s1 P. Pedreira, L. Esteban, A.R. Criado, P. Acedo, M. Sánchez, and J. Sánchez, ''Two color multichannel heterodyne interferometer set up for high spatial resolution electron density profile measurements in TJ-II'', Rev. Sci. Instrum. '''81''' (2010) 10D517]</ref>
	The system is located in [[TJ-II:Sectors\|sector]] B1.		The system is located in [[TJ-II:Sectors\|sector]] B1.

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

Admin: /* The Microwave interferometer */

2010-08-19T10:42:39Z

The Microwave interferometer

← Older revision		Revision as of 12:42, 19 August 2010
Line 4:		Line 4:

	[[File:inter.png\|250px\|thumb\|right\|Diagram showing the geometry of the microwave interferometer at TJ-II]]		[[File:inter.png\|250px\|thumb\|right\|Diagram showing the geometry of the microwave interferometer at TJ-II]]
	The diagnostic is located in [[TJ-II:Sectors\|sector]] B8.		The diagnostic is located in [[TJ-II:Sectors\|sector]] B8 (φ = 264.4°).
	The probing beam has an inclination of 18.7° with respect to the vertical and a frequency of 140 GHz, corresponding to a wavelength of λ = 2.14 mm.		The probing beam has an inclination of 18.7° with respect to the vertical and a frequency of 140 GHz, corresponding to a wavelength of λ = 2.14 mm.
	The line-integrated electron density is deduced from the cumulative phase change of the probing beam and the theoretical length of the intersection of the probing beam with the plasma (obtained from the [[TJ-II:Magnetic coordinates\|magnetic geometry]] in vacuum).		The line-integrated electron density is deduced from the cumulative phase change of the probing beam and the theoretical length of the intersection of the probing beam with the plasma (obtained from the [[TJ-II:Magnetic coordinates\|magnetic geometry]] in vacuum).

Admin: /* Data description */

2010-08-19T10:34:51Z

Data description

← Older revision		Revision as of 12:34, 19 August 2010
Line 10:		Line 10:
	=== Data description ===		=== Data description ===
	The diagnostic delivers a time trace of the line-integrated electron density (65536 points, sampling rate 100 kHz).		The diagnostic delivers a time trace of the line-integrated electron density (65536 points, sampling rate 100 kHz).
	In the [[TJ-II:Shot_database\|TJ-II database]], the raw data are called 'INTERI', 'INTERQ', and the processed data 'Densidad2_'.		In the [[TJ-II:Shot_database\|TJ-II database]], the raw data are called 'INTERI', 'INTERQ', and the processed data 'Densidad2_' (units: 10<sup>19</sup> m<sup>-3</sup>).
	The signal is less reliable for high densities (above 2-3 10<sup>19</sup> m<sup>-3</sup>) due to the cumulative effect of spurious phase jumps.		The signal is less reliable for high densities (above 2-3 10<sup>19</sup> m<sup>-3</sup>) due to the cumulative effect of spurious phase jumps.
	This time trace is fundamental for machine operation.		This time trace is fundamental for machine operation.

Admin: /* The Microwave interferometer */

2010-08-19T10:33:47Z

The Microwave interferometer

← Older revision		Revision as of 12:33, 19 August 2010
Line 3:		Line 3:
	== The Microwave interferometer ==		== The Microwave interferometer ==

			[[File:inter.png\|250px\|thumb\|right\|Diagram showing the geometry of the microwave interferometer at TJ-II]]
	The diagnostic is located in [[TJ-II:Sectors\|sector]] B8.		The diagnostic is located in [[TJ-II:Sectors\|sector]] B8.
	The probing beam has an inclination of 18.7° with respect to the vertical and a frequency of 140 GHz, corresponding to a wavelength of λ = 2.14 mm.		The probing beam has an inclination of 18.7° with respect to the vertical and a frequency of 140 GHz, corresponding to a wavelength of λ = 2.14 mm.

Admin: /* The Microwave interferometer */

2010-08-19T10:27:14Z

The Microwave interferometer

← Older revision		Revision as of 12:27, 19 August 2010
Line 5:		Line 5:
	The diagnostic is located in [[TJ-II:Sectors\|sector]] B8.		The diagnostic is located in [[TJ-II:Sectors\|sector]] B8.
	The probing beam has an inclination of 18.7° with respect to the vertical and a frequency of 140 GHz, corresponding to a wavelength of λ = 2.14 mm.		The probing beam has an inclination of 18.7° with respect to the vertical and a frequency of 140 GHz, corresponding to a wavelength of λ = 2.14 mm.
	The diagnostic ~~provides~~ a time trace of the line-integrated electron density (65536 points, sampling rate 100 kHz).		The line-integrated electron density is deduced from the cumulative phase change of the probing beam and the theoretical length of the intersection of the probing beam with the plasma (obtained from the [[TJ-II:Magnetic coordinates\|magnetic geometry]] in vacuum).
	~~The processed time trace is called 'Densidad2_' in~~ the [[TJ-II:Shot_database\|TJ-II database]] (raw data: 'INTERI', 'INTERQ').
	The signal is less reliable for high densities (above 2-3 10<sup>19</sup> m<sup>-3</sup>).		=== Data description ===
			The diagnostic delivers a time trace of the line-integrated electron density (65536 points, sampling rate 100 kHz).
			In the [[TJ-II:Shot_database\|TJ-II database]], the raw data are called 'INTERI', 'INTERQ', and the processed data 'Densidad2_'.
			The signal is less reliable for high densities (above 2-3 10<sup>19</sup> m<sup>-3</sup>) due to the cumulative effect of spurious phase jumps.
	This time trace is fundamental for machine operation.		This time trace is fundamental for machine operation.

Admin: /* The Microwave interferometer */

2010-08-19T09:07:16Z

The Microwave interferometer

← Older revision		Revision as of 11:07, 19 August 2010
Line 4:		Line 4:

	The diagnostic is located in [[TJ-II:Sectors\|sector]] B8.		The diagnostic is located in [[TJ-II:Sectors\|sector]] B8.
	The probing beam has an inclination of 18.7º with respect to the vertical and a frequency of 140 GHz, corresponding to a wavelength of λ = 2.14 mm.		The probing beam has an inclination of 18.7° with respect to the vertical and a frequency of 140 GHz, corresponding to a wavelength of λ = 2.14 mm.
	The diagnostic provides a time trace of the line-integrated electron density (65536 points, sampling rate 100 kHz).		The diagnostic provides a time trace of the line-integrated electron density (65536 points, sampling rate 100 kHz).
	The time trace is called 'Densidad2_' in the [[TJ-II:Shot_database\|TJ-II database]].		The processed time trace is called 'Densidad2_' in the [[TJ-II:Shot_database\|TJ-II database]] (raw data: 'INTERI', 'INTERQ').
	The signal is less reliable for high densities (above 2-3 10<sup>19</sup> m<sup>-3</sup>).		The signal is less reliable for high densities (above 2-3 10<sup>19</sup> m<sup>-3</sup>).
	This time trace is fundamental for machine operation.		This time trace is fundamental for machine operation.

Admin: /* Two-colour interferometer */

2010-04-26T08:52:26Z

Two-colour interferometer

← Older revision		Revision as of 10:52, 26 April 2010
Line 19:		Line 19:
	<ref>[http://link.aip.org/link/?APCPCS/993/187/1 M. Sánchez et al, ''Admissible Crosstalk Limits in a Two Colour Interferometers for Plasma Density Diagnostics. A Reduction Algorithm'', PLASMA 2007, AIP Conf. Proc. '''993''' (2008) 187-190]</ref>		<ref>[http://link.aip.org/link/?APCPCS/993/187/1 M. Sánchez et al, ''Admissible Crosstalk Limits in a Two Colour Interferometers for Plasma Density Diagnostics. A Reduction Algorithm'', PLASMA 2007, AIP Conf. Proc. '''993''' (2008) 187-190]</ref>
	<ref>[http://link.aip.org/link/?RSINAK/79/10E713/1 P. Acedo et al, ''Calibration of a high spatial resolution laser two-color heterodyne interferometer for density profile measurements in the TJ-II stellarator'', Rev. Sci. Instrum. '''79''' (2008) 10E713]</ref>		<ref>[http://link.aip.org/link/?RSINAK/79/10E713/1 P. Acedo et al, ''Calibration of a high spatial resolution laser two-color heterodyne interferometer for density profile measurements in the TJ-II stellarator'', Rev. Sci. Instrum. '''79''' (2008) 10E713]</ref>
	<ref>[http://dx.doi.org/10.1016/j.fusengdes.2010.03.036 L. Esteban, M. Sánchez, J.A. López, O. Nieto-Taladriz and J. Sánchez, ''Continuous plasma density measurement in TJ-II infrared interferometer—Advanced signal processing based on FPGAs'', Fus- Eng. ~~Designs~~ (2010) in press]</ref>		<ref>[http://dx.doi.org/10.1016/j.fusengdes.2010.03.036 L. Esteban, M. Sánchez, J.A. López, O. Nieto-Taladriz and J. Sánchez, ''Continuous plasma density measurement in TJ-II infrared interferometer—Advanced signal processing based on FPGAs'', Fus. Eng. Design (2010) in press]</ref>
	The system is located in [[TJ-II:Sectors\|sector]] B1.		The system is located in [[TJ-II:Sectors\|sector]] B1.

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