TJ-II:Spectroscopy - Revision history

Admin: Updated reference links

2018-04-03T16:20:16Z

Updated reference links

Admin at 15:53, 21 October 2014

2014-10-21T15:53:36Z

← Older revision		Revision as of 17:53, 21 October 2014
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	[[Image:spectrometer-setup.png\|frame\|Observation geometry of the nine-channel high-resolution spectroscopic diagnostic system]]		[[Image:spectrometer-setup.png\|frame\|Observation geometry of the nine-channel high-resolution spectroscopic diagnostic system]]

	[[TJ-II]] disposes of a nine-channel, high-resolution, spectroscopic diagnostic system. This system is currently being used to measure impurity ion temperature and poloidal rotation using passive emission spectroscopy. The principal features of the diagnostic include independent focusing of its channels, high sensitivity for performing Doppler measurements in plasmas, as well as a flexible and fast in-house-developed software program for performing integrated data reduction and analysis.		[[TJ-II]] disposes of a nine-channel, high-resolution, spectroscopic diagnostic system. This system is currently being used to measure [[impurities\|impurity]] ion temperature and poloidal rotation using passive emission spectroscopy. The principal features of the diagnostic include independent focusing of its channels, high sensitivity for performing Doppler measurements in plasmas, as well as a flexible and fast in-house-developed software program for performing integrated data reduction and analysis.
	<ref>[http://link.aip.org/link/?RSINAK/72/971/1 A. Baciero et al, ''A multi-channel spectroscopic system for measuring impurity ion temperatures and poloidal rotation velocities in TJ-II'', Rev. Sci. Instrum. '''72''' (2001) 971]</ref>		<ref>[http://link.aip.org/link/?RSINAK/72/971/1 A. Baciero et al, ''A multi-channel spectroscopic system for measuring impurity ion temperatures and poloidal rotation velocities in TJ-II'', Rev. Sci. Instrum. '''72''' (2001) 971]</ref>
	<ref>[http://www.new.ans.org/pubs/journals/fst/a_1264 B. Zurro et al, ''Comparison of Impurity Poloidal Rotation in ECRH and NBI Discharges of the TJ-II HELIAC'', Fusion Science and Technology '''50''', 3 (2006) 419-427]</ref>. This experimental system has also been used to measure proton rotation using spectral line emission from excited fast neutrals created from inner core plasma protons via charge exchange transfer reactions. <ref>[http://link.aip.org/link/?RSINAK/74/2056/1 B. Zurro et al, ''Investigation of proton rotation measurements using hydrogen line wings in the TJ-II stellarator'', Rev. Sci. Instrum. '''74''' (2003) 2056]</ref>		<ref>[http://www.new.ans.org/pubs/journals/fst/a_1264 B. Zurro et al, ''Comparison of Impurity Poloidal Rotation in ECRH and NBI Discharges of the TJ-II HELIAC'', Fusion Science and Technology '''50''', 3 (2006) 419-427]</ref>. This experimental system has also been used to measure proton rotation using spectral line emission from excited fast neutrals created from inner core plasma protons via charge exchange transfer reactions. <ref>[http://link.aip.org/link/?RSINAK/74/2056/1 B. Zurro et al, ''Investigation of proton rotation measurements using hydrogen line wings in the TJ-II stellarator'', Rev. Sci. Instrum. '''74''' (2003) 2056]</ref>
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	== VUV spectroscopy ==		== VUV spectroscopy ==

	A vacuum ultraviolet spectrometer has been operated on TJ-II since 1999. It is an f/10.4 1 m normal-incidence vacuum spectrometer equipped with interchangeable 1200 and 3600 lines mm<sup>-1</sup> gratings and a back-illuminated CCD camera with 400 × 1340 pixels (20 × 20 μm<sup>2</sup>). The instrument covers the wavelength range from ~20 to ~300 nm. It has been used to perform spectral surveys (identify and follow the evolution of plasma impurities), to obtain impurity ion temperatures, and to perform specialized studies (e.g. study fast oxygen ions present in plasmas during the neutral beam injection heating phase).		A vacuum ultraviolet spectrometer has been operated on TJ-II since 1999. It is an f/10.4 1 m normal-incidence vacuum spectrometer equipped with interchangeable 1200 and 3600 lines mm<sup>-1</sup> gratings and a back-illuminated CCD camera with 400 × 1340 pixels (20 × 20 μm<sup>2</sup>). The instrument covers the wavelength range from ~20 to ~300 nm. It has been used to perform spectral surveys (identify and follow the evolution of plasma [[impurities]]), to obtain impurity ion temperatures, and to perform specialized studies (e.g. study fast oxygen ions present in plasmas during the neutral beam injection heating phase).
	<ref>[http://dx.doi.org/10.1209/epl/i2003-00476-x K.J. McCarthy, B. Zurro, R. Balbín, A. Baciero, J. Herranz, and I. Pastor, ''Results of an experiment relating apparent Doppler ion temperatures with non-thermal velocities in hot-fusion plasmas'', Europhys. Lett. '''63''' (2003) 49]</ref>		<ref>[http://dx.doi.org/10.1209/epl/i2003-00476-x K.J. McCarthy, B. Zurro, R. Balbín, A. Baciero, J. Herranz, and I. Pastor, ''Results of an experiment relating apparent Doppler ion temperatures with non-thermal velocities in hot-fusion plasmas'', Europhys. Lett. '''63''' (2003) 49]</ref>
	<ref>[http://www.new.ans.org/store/j_548 K.J. McCarthy, M. A. Ochando, F. Medina, B. Zurro, C. Hidalgo, M. A. Pedrosa, I. Pastor, J. Herranz and A. Baciero, ''A First Study of Impurity Behavior During Externally Induced Radial Electric Fields in the TJ-II Stellarator'', Fusion Sci. & Tech. '''46''', 129-134 (2004)]</ref>		<ref>[http://www.new.ans.org/store/j_548 K.J. McCarthy, M. A. Ochando, F. Medina, B. Zurro, C. Hidalgo, M. A. Pedrosa, I. Pastor, J. Herranz and A. Baciero, ''A First Study of Impurity Behavior During Externally Induced Radial Electric Fields in the TJ-II Stellarator'', Fusion Sci. & Tech. '''46''', 129-134 (2004)]</ref>
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	== Charge exchange recombination spectroscopy ==		== Charge exchange recombination spectroscopy ==

	The TJ-II is also equipped with a multi-channel spectroscopic and compact [[TJ-II:Diagnostic neutral beam\|diagnostic neutral beam injector system]] optimized for performing [[TJ-II:Charge exchange spectroscopy\|Charge Exchange Recombination Spectroscopy]]. It permits localized measurements of the impurity ion temperature as well as poloidal and toroidal velocity at 12 positions across the plasma minor radius. For this, the system is set-up to observe the 529.06 nm line emission of C<sup>+5</sup>.		The TJ-II is also equipped with a multi-channel spectroscopic and compact [[TJ-II:Diagnostic neutral beam\|diagnostic neutral beam injector system]] optimized for performing [[TJ-II:Charge exchange spectroscopy\|Charge Exchange Recombination Spectroscopy]]. It permits localized measurements of the [[impurities\|impurity]] ion temperature as well as poloidal and toroidal velocity at 12 positions across the plasma minor radius. For this, the system is set-up to observe the 529.06 nm line emission of C<sup>+5</sup>.

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

Admin: /* VUV spectroscopy */

2010-09-20T13:54:24Z

VUV spectroscopy

← Older revision		Revision as of 15:54, 20 September 2010
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	== VUV spectroscopy ==		== VUV spectroscopy ==

	A vacuum ultraviolet spectrometer has been operated on TJ-II since 1999. It is an f/10.4 1 m normal-incidence vacuum spectrometer equipped with interchangeable 1200 and 3600 lines mm<sup>-1</sup> gratings and a back-illuminated CCD camera with 400 x 1340 pixels (20 x 20 μm<sup>2</sup>). The instrument covers the wavelength range from ~20 to ~300 nm. It has been used to perform spectral surveys (identify and follow the evolution of plasma impurities), to obtain impurity ion temperatures, and to perform specialized studies (e.g. study fast oxygen ions present in plasmas during the neutral beam injection heating phase.		A vacuum ultraviolet spectrometer has been operated on TJ-II since 1999. It is an f/10.4 1 m normal-incidence vacuum spectrometer equipped with interchangeable 1200 and 3600 lines mm<sup>-1</sup> gratings and a back-illuminated CCD camera with 400 × 1340 pixels (20 × 20 μm<sup>2</sup>). The instrument covers the wavelength range from ~20 to ~300 nm. It has been used to perform spectral surveys (identify and follow the evolution of plasma impurities), to obtain impurity ion temperatures, and to perform specialized studies (e.g. study fast oxygen ions present in plasmas during the neutral beam injection heating phase).
	<ref>[http://dx.doi.org/10.1209/epl/i2003-00476-x K.J. McCarthy, B. Zurro, R. Balbín, A. Baciero, J. Herranz, and I. Pastor, Europhys. Lett. '''63''' (2003) 49]</ref>		<ref>[http://dx.doi.org/10.1209/epl/i2003-00476-x K.J. McCarthy, B. Zurro, R. Balbín, A. Baciero, J. Herranz, and I. Pastor, ''Results of an experiment relating apparent Doppler ion temperatures with non-thermal velocities in hot-fusion plasmas'', Europhys. Lett. '''63''' (2003) 49]</ref>
	<ref>[http://www.new.ans.org/store/j_548 K.J. McCarthy, M. A. Ochando, F. Medina, B. Zurro, C. Hidalgo, M. A. Pedrosa, I. Pastor, J. Herranz and A. Baciero, Fusion Sci. & Tech. '''46''', 129-134 (2004)]</ref>		<ref>[http://www.new.ans.org/store/j_548 K.J. McCarthy, M. A. Ochando, F. Medina, B. Zurro, C. Hidalgo, M. A. Pedrosa, I. Pastor, J. Herranz and A. Baciero, ''A First Study of Impurity Behavior During Externally Induced Radial Electric Fields in the TJ-II Stellarator'', Fusion Sci. & Tech. '''46''', 129-134 (2004)]</ref>
	<ref>[http://dx.doi.org/10.1088/0953-4075/43/14/144020 K.J. McCarthy, V. Tribaldos, J. Arévalo, and M. Liniers, J. Physics B: Atomic, Molecular and Optical Physics '''43''' (2010) 144020]</ref>		<ref>[http://dx.doi.org/10.1088/0953-4075/43/14/144020 K.J. McCarthy, V. Tribaldos, J. Arévalo, and M. Liniers, ''The detection of fast oxygen ions in neutral beam-heated plasmas of the TJ-II stellarator using spectroscopy methods'', J. Physics B: Atomic, Molecular and Optical Physics '''43''' (2010) 144020]</ref>

	== Charge exchange recombination spectroscopy ==		== Charge exchange recombination spectroscopy ==

Admin at 11:41, 20 September 2010

2010-09-20T11:41:01Z

← Older revision		Revision as of 13:41, 20 September 2010
Line 15:		Line 15:
	φ = 170.56° ([[TJ-II:Sectors\|sector]] B8).		φ = 170.56° ([[TJ-II:Sectors\|sector]] B8).

	== ~~Other techniques~~ ==		== VUV spectroscopy ==

	A vacuum ultraviolet spectrometer has been operated on TJ-II since 1999. It is an f/10.4 1 m normal-incidence vacuum spectrometer equipped with interchangeable 1200 and 3600 lines mm<sup>-1</sup> gratings and a back-illuminated CCD camera with 400 x 1340 pixels (20 x 20 μm<sup>2</sup>). The instrument covers the wavelength range from ~20 to ~300 nm. It has been used to perform spectral surveys (identify and follow the evolution of plasma impurities), to obtain impurity ion temperatures, and to perform specialized studies (e.g. study fast oxygen ions present in plasmas during the neutral beam injection heating phase.		A vacuum ultraviolet spectrometer has been operated on TJ-II since 1999. It is an f/10.4 1 m normal-incidence vacuum spectrometer equipped with interchangeable 1200 and 3600 lines mm<sup>-1</sup> gratings and a back-illuminated CCD camera with 400 x 1340 pixels (20 x 20 μm<sup>2</sup>). The instrument covers the wavelength range from ~20 to ~300 nm. It has been used to perform spectral surveys (identify and follow the evolution of plasma impurities), to obtain impurity ion temperatures, and to perform specialized studies (e.g. study fast oxygen ions present in plasmas during the neutral beam injection heating phase.
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	<ref>[http://www.new.ans.org/store/j_548 K.J. McCarthy, M. A. Ochando, F. Medina, B. Zurro, C. Hidalgo, M. A. Pedrosa, I. Pastor, J. Herranz and A. Baciero, Fusion Sci. & Tech. '''46''', 129-134 (2004)]</ref>		<ref>[http://www.new.ans.org/store/j_548 K.J. McCarthy, M. A. Ochando, F. Medina, B. Zurro, C. Hidalgo, M. A. Pedrosa, I. Pastor, J. Herranz and A. Baciero, Fusion Sci. & Tech. '''46''', 129-134 (2004)]</ref>
	<ref>[http://dx.doi.org/10.1088/0953-4075/43/14/144020 K.J. McCarthy, V. Tribaldos, J. Arévalo, and M. Liniers, J. Physics B: Atomic, Molecular and Optical Physics '''43''' (2010) 144020]</ref>		<ref>[http://dx.doi.org/10.1088/0953-4075/43/14/144020 K.J. McCarthy, V. Tribaldos, J. Arévalo, and M. Liniers, J. Physics B: Atomic, Molecular and Optical Physics '''43''' (2010) 144020]</ref>

			== Charge exchange recombination spectroscopy ==

	The TJ-II is also equipped with a multi-channel spectroscopic and compact [[TJ-II:Diagnostic neutral beam\|diagnostic neutral beam injector system]] optimized for performing [[TJ-II:Charge exchange spectroscopy\|Charge Exchange Recombination Spectroscopy]]. It permits localized measurements of the impurity ion temperature as well as poloidal and toroidal velocity at 12 positions across the plasma minor radius. For this, the system is set-up to observe the 529.06 nm line emission of C<sup>+5</sup>.		The TJ-II is also equipped with a multi-channel spectroscopic and compact [[TJ-II:Diagnostic neutral beam\|diagnostic neutral beam injector system]] optimized for performing [[TJ-II:Charge exchange spectroscopy\|Charge Exchange Recombination Spectroscopy]]. It permits localized measurements of the impurity ion temperature as well as poloidal and toroidal velocity at 12 positions across the plasma minor radius. For this, the system is set-up to observe the 529.06 nm line emission of C<sup>+5</sup>.

Admin at 10:29, 20 September 2010

2010-09-20T10:29:52Z

← Older revision		Revision as of 12:29, 20 September 2010
Line 18:		Line 18:

	A vacuum ultraviolet spectrometer has been operated on TJ-II since 1999. It is an f/10.4 1 m normal-incidence vacuum spectrometer equipped with interchangeable 1200 and 3600 lines mm<sup>-1</sup> gratings and a back-illuminated CCD camera with 400 x 1340 pixels (20 x 20 μm<sup>2</sup>). The instrument covers the wavelength range from ~20 to ~300 nm. It has been used to perform spectral surveys (identify and follow the evolution of plasma impurities), to obtain impurity ion temperatures, and to perform specialized studies (e.g. study fast oxygen ions present in plasmas during the neutral beam injection heating phase.		A vacuum ultraviolet spectrometer has been operated on TJ-II since 1999. It is an f/10.4 1 m normal-incidence vacuum spectrometer equipped with interchangeable 1200 and 3600 lines mm<sup>-1</sup> gratings and a back-illuminated CCD camera with 400 x 1340 pixels (20 x 20 μm<sup>2</sup>). The instrument covers the wavelength range from ~20 to ~300 nm. It has been used to perform spectral surveys (identify and follow the evolution of plasma impurities), to obtain impurity ion temperatures, and to perform specialized studies (e.g. study fast oxygen ions present in plasmas during the neutral beam injection heating phase.
	<ref>K. J. McCarthy, B. Zurro, R. Balbín, A. Baciero, J. Herranz, and I. Pastor, Europhys. Lett. 63 (2003) 49</ref>		<ref>[http://dx.doi.org/10.1209/epl/i2003-00476-x K.J. McCarthy, B. Zurro, R. Balbín, A. Baciero, J. Herranz, and I. Pastor, Europhys. Lett. '''63''' (2003) 49]</ref>
	<ref>K. J. McCarthy, M. A. Ochando, F. Medina, B. Zurro, C. Hidalgo, M. A. Pedrosa, I. Pastor, J. Herranz and A. Baciero, Fusion Sci. & Tech. 46, 129-134 (2004)</ref>		<ref>[http://www.new.ans.org/store/j_548 K.J. McCarthy, M. A. Ochando, F. Medina, B. Zurro, C. Hidalgo, M. A. Pedrosa, I. Pastor, J. Herranz and A. Baciero, Fusion Sci. & Tech. '''46''', 129-134 (2004)]</ref>
	<ref>K. J. McCarthy, V. Tribaldos, J. Arévalo, and M. Liniers, J. Physics B: Atomic, Molecular and Optical Physics 43 (2010) 144020</ref>		<ref>[http://dx.doi.org/10.1088/0953-4075/43/14/144020 K.J. McCarthy, V. Tribaldos, J. Arévalo, and M. Liniers, J. Physics B: Atomic, Molecular and Optical Physics '''43''' (2010) 144020]</ref>

	The TJ-II is also equipped with a multi-channel spectroscopic and compact diagnostic neutral beam injector system optimized for performing Charge Exchange Recombination Spectroscopy. It permits localized measurements of the impurity ion temperature as well as poloidal and toroidal velocity at 12 positions across the plasma minor radius. For this, the system is set-up to observe the 529.06 nm line emission of C<sup>+5</sup>.		The TJ-II is also equipped with a multi-channel spectroscopic and compact [[TJ-II:Diagnostic neutral beam\|diagnostic neutral beam injector system]] optimized for performing [[TJ-II:Charge exchange spectroscopy\|Charge Exchange Recombination Spectroscopy]]. It permits localized measurements of the impurity ion temperature as well as poloidal and toroidal velocity at 12 positions across the plasma minor radius. For this, the system is set-up to observe the 529.06 nm line emission of C<sup>+5</sup>.
	~~<ref>J.M. Carmona, K.J. McCarthy, V. Tribaldos, R. Balbín, Fusion Sci. Tech. 54, 962-969 (2008)</ref>~~
	~~<ref>J.M. Carmona, K.J. McCarthy, V. Tribaldos, R. Balbín, Fusion Sci. Tech. 54, 962-969 (2008)</ref>~~
	~~<ref>J. M. Carmona, K. J. McCarthy, R. Balbín, S. Petrov, Rev. Sci. Instrum. 77, 10F107 (2006)</ref>~~

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

130.206.11.139 at 09:14, 20 September 2010

2010-09-20T09:14:31Z

← Older revision		Revision as of 11:14, 20 September 2010
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	== Toroidal rotation measurement ==		== Toroidal rotation measurement ==

	[[File:TJ-II McPherson.jpg\|300px\|thumb\|right\|~~Spectroscopy device for toroidal rotation measurement~~]]		[[File:TJ-II McPherson.jpg\|300px\|thumb\|right\|The VUV spectrometer on TJ-II]]
	A method for measuring absolutely calibrated toroidal rotation velocities consists of simultaneously recording the emission lines from the plasma and from a calibration lamp by means of a double fiber-fiber guide.		A method for measuring absolutely calibrated toroidal rotation velocities consists of simultaneously recording the emission lines from the plasma and from a calibration lamp by means of a double fiber-fiber guide.
	<ref>[http://link.aip.org/link/?RSINAK/77/033506/1 D. Rapisarda et al, ''Novel passive spectroscopy system for absolutely referenced plasma rotation measurements in clean plasmas'', Rev. Sci. Instrum. '''77''' (2006) 033506]</ref>		<ref>[http://link.aip.org/link/?RSINAK/77/033506/1 D. Rapisarda et al, ''Novel passive spectroscopy system for absolutely referenced plasma rotation measurements in clean plasmas'', Rev. Sci. Instrum. '''77''' (2006) 033506]</ref>

130.206.11.139 at 09:13, 20 September 2010

2010-09-20T09:13:44Z

← Older revision		Revision as of 11:13, 20 September 2010
Line 17:		Line 17:
	== Other techniques ==		== Other techniques ==

	A vacuum ultraviolet spectrometer is used ~~for performing~~ spectral surveys and specialized ~~plasma~~ studies.		A vacuum ultraviolet spectrometer has been operated on TJ-II since 1999. It is an f/10.4 1 m normal-incidence vacuum spectrometer equipped with interchangeable 1200 and 3600 lines mm<sup>-1</sup> gratings and a back-illuminated CCD camera with 400 x 1340 pixels (20 x 20 μm<sup>2</sup>). The instrument covers the wavelength range from ~20 to ~300 nm. It has been used to perform spectral surveys (identify and follow the evolution of plasma impurities), to obtain impurity ion temperatures, and to perform specialized studies (e.g. study fast oxygen ions present in plasmas during the neutral beam injection heating phase.
	<ref>~~[http://link~~.~~aip~~.~~org~~/~~link/?RSINAK/70/312/1~~ K.J. McCarthy ~~et al~~, ''A ~~toroidal focusing mirror based vacuum ultraviolet diagnostic for TJ-II''~~, ~~Rev~~. Sci. ~~Instrum~~. ~~'''70'''~~ (~~1999~~) ~~312]~~</ref>		<ref>K. J. McCarthy, B. Zurro, R. Balbín, A. Baciero, J. Herranz, and I. Pastor, Europhys. Lett. 63 (2003) 49</ref>
	<ref>~~[http://link.aip.org/link/?APCPCS/1058/219/1~~ K.J. McCarthy ~~et al~~, ~~''A Study of Spectral Lines in Plasmas Heated by Neutral Beam Injection in the TJ-II Stellarator''~~, ~~AIP Conf~~. ~~Proc~~. ~~'''1058'''~~ (~~2008~~) ~~219-221]~~</ref>		<ref>K. J. McCarthy, M. A. Ochando, F. Medina, B. Zurro, C. Hidalgo, M. A. Pedrosa, I. Pastor, J. Herranz and A. Baciero, Fusion Sci. & Tech. 46, 129-134 (2004)</ref>
			<ref>K. J. McCarthy, V. Tribaldos, J. Arévalo, and M. Liniers, J. Physics B: Atomic, Molecular and Optical Physics 43 (2010) 144020</ref>

	The ~~chord~~-~~integrated emissions of spectral lines are monitored by using~~ a ~~spectral~~ system ~~with time and space scanning capabilities~~ and ~~relative calibration over~~ the ~~entire UV-visible spectral range~~. ~~This~~ system ~~has been used~~ to ~~study~~ the line ~~ratio~~ of ~~lines of different ionization stages of carbon~~ C<sup>5+</sup> ~~5290 Å and C~~<~~sup~~>4+</~~sup~~> ~~2271 Å for plasma diagnostic purposes~~.		The TJ-II is also equipped with a multi-channel spectroscopic and compact diagnostic neutral beam injector system optimized for performing Charge Exchange Recombination Spectroscopy. It permits localized measurements of the impurity ion temperature as well as poloidal and toroidal velocity at 12 positions across the plasma minor radius. For this, the system is set-up to observe the 529.06 nm line emission of C<sup>+5</sup>.
	<ref>~~[http://link~~.~~aip~~.~~org/link/?RSINAK/79/10F540/1 B~~. ~~Zurro et al~~, ~~''An experimental system for spectral line ratio measurements in the TJ-II stellarator''~~, Rev. Sci. Instrum. ~~'''79'''~~ (~~2008~~) ~~10F540]~~</ref>		<ref>J.M. Carmona, K.J. McCarthy, V. Tribaldos, R. Balbín, Fusion Sci. Tech. 54, 962-969 (2008)</ref>
			<ref>J.M. Carmona, K.J. McCarthy, V. Tribaldos, R. Balbín, Fusion Sci. Tech. 54, 962-969 (2008)</ref>
			<ref>J. M. Carmona, K. J. McCarthy, R. Balbín, S. Petrov, Rev. Sci. Instrum. 77, 10F107 (2006)</ref>

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

Admin: /* Other techniques */

2009-10-18T11:05:00Z

Other techniques

← Older revision		Revision as of 13:05, 18 October 2009
Line 7:		Line 7:
	<ref>[http://www.new.ans.org/pubs/journals/fst/a_1264 B. Zurro et al, ''Comparison of Impurity Poloidal Rotation in ECRH and NBI Discharges of the TJ-II HELIAC'', Fusion Science and Technology '''50''', 3 (2006) 419-427]</ref>. This experimental system has also been used to measure proton rotation using spectral line emission from excited fast neutrals created from inner core plasma protons via charge exchange transfer reactions. <ref>[http://link.aip.org/link/?RSINAK/74/2056/1 B. Zurro et al, ''Investigation of proton rotation measurements using hydrogen line wings in the TJ-II stellarator'', Rev. Sci. Instrum. '''74''' (2003) 2056]</ref>		<ref>[http://www.new.ans.org/pubs/journals/fst/a_1264 B. Zurro et al, ''Comparison of Impurity Poloidal Rotation in ECRH and NBI Discharges of the TJ-II HELIAC'', Fusion Science and Technology '''50''', 3 (2006) 419-427]</ref>. This experimental system has also been used to measure proton rotation using spectral line emission from excited fast neutrals created from inner core plasma protons via charge exchange transfer reactions. <ref>[http://link.aip.org/link/?RSINAK/74/2056/1 B. Zurro et al, ''Investigation of proton rotation measurements using hydrogen line wings in the TJ-II stellarator'', Rev. Sci. Instrum. '''74''' (2003) 2056]</ref>

	== ~~Other techniques~~ ==		== Toroidal rotation measurement ==

	~~One~~ method for measuring absolutely calibrated toroidal rotation velocities consists of simultaneously recording the emission lines from the plasma and from a calibration lamp by means of a double fiber-fiber guide.		[[File:TJ-II McPherson.jpg\|300px\|thumb\|right\|Spectroscopy device for toroidal rotation measurement]]
			A method for measuring absolutely calibrated toroidal rotation velocities consists of simultaneously recording the emission lines from the plasma and from a calibration lamp by means of a double fiber-fiber guide.
	<ref>[http://link.aip.org/link/?RSINAK/77/033506/1 D. Rapisarda et al, ''Novel passive spectroscopy system for absolutely referenced plasma rotation measurements in clean plasmas'', Rev. Sci. Instrum. '''77''' (2006) 033506]</ref>		<ref>[http://link.aip.org/link/?RSINAK/77/033506/1 D. Rapisarda et al, ''Novel passive spectroscopy system for absolutely referenced plasma rotation measurements in clean plasmas'', Rev. Sci. Instrum. '''77''' (2006) 033506]</ref>
			The system has been mounted at φ = -9.45° ([[TJ-II:Sectors\|sector]] D8) and
			φ = 170.56° ([[TJ-II:Sectors\|sector]] B8).

			== Other techniques ==

	A vacuum ultraviolet spectrometer is used for performing spectral surveys and specialized plasma studies.		A vacuum ultraviolet spectrometer is used for performing spectral surveys and specialized plasma studies.

Admin at 17:06, 3 September 2009

2009-09-03T17:06:00Z

← Older revision		Revision as of 19:06, 3 September 2009
Line 1:		Line 1:
			== Multichannel system ==

	[[Image:spectrometer-setup.png\|frame\|Observation geometry of the nine-channel high-resolution spectroscopic diagnostic system]]		[[Image:spectrometer-setup.png\|frame\|Observation geometry of the nine-channel high-resolution spectroscopic diagnostic system]]

	[[TJ-II]] disposes of a nine-channel, high-resolution, spectroscopic diagnostic system. This system is currently being used to measure impurity ion temperature and poloidal rotation using passive emission spectroscopy. The principal features of the diagnostic include independent focusing of its channels, high sensitivity for performing Doppler measurements in plasmas, as well as a flexible and fast in-house-developed software program for performing integrated data reduction and analysis.		[[TJ-II]] disposes of a nine-channel, high-resolution, spectroscopic diagnostic system. This system is currently being used to measure impurity ion temperature and poloidal rotation using passive emission spectroscopy. The principal features of the diagnostic include independent focusing of its channels, high sensitivity for performing Doppler measurements in plasmas, as well as a flexible and fast in-house-developed software program for performing integrated data reduction and analysis.
	<ref>[http://link.aip.org/link/?RSINAK/72/971/1 A. Baciero et al, ''A multi-channel spectroscopic system for measuring impurity ion temperatures and poloidal rotation velocities in TJ-II'', Rev. Sci. Instrum. '''72''' (2001) 971]</ref>		<ref>[http://link.aip.org/link/?RSINAK/72/971/1 A. Baciero et al, ''A multi-channel spectroscopic system for measuring impurity ion temperatures and poloidal rotation velocities in TJ-II'', Rev. Sci. Instrum. '''72''' (2001) 971]</ref>
	<ref>[http://www.new.ans.org/pubs/journals/fst/a_1264 B. Zurro et al, ''Comparison of Impurity Poloidal Rotation in ECRH and NBI Discharges of the TJ-II HELIAC'', Fusion Science and Technology '''50''', 3 (2006) 419-427]</ref>. This experimental system has been ~~also~~ used to measure proton rotation using spectral line emission from excited fast neutrals created from inner core plasma protons via charge exchange transfer reactions. <ref>[http://link.aip.org/link/?RSINAK/74/2056/1 B. Zurro et al, ''Investigation of proton rotation measurements using hydrogen line wings in the TJ-II stellarator'', Rev. Sci. Instrum. '''74''' (2003) 2056]</ref>		<ref>[http://www.new.ans.org/pubs/journals/fst/a_1264 B. Zurro et al, ''Comparison of Impurity Poloidal Rotation in ECRH and NBI Discharges of the TJ-II HELIAC'', Fusion Science and Technology '''50''', 3 (2006) 419-427]</ref>. This experimental system has also been used to measure proton rotation using spectral line emission from excited fast neutrals created from inner core plasma protons via charge exchange transfer reactions. <ref>[http://link.aip.org/link/?RSINAK/74/2056/1 B. Zurro et al, ''Investigation of proton rotation measurements using hydrogen line wings in the TJ-II stellarator'', Rev. Sci. Instrum. '''74''' (2003) 2056]</ref>

			== Other techniques ==

	A method for measuring absolutely calibrated toroidal rotation velocities consists of simultaneously recording the emission lines from the plasma and from a calibration lamp by means of a double fiber-fiber guide.		One method for measuring absolutely calibrated toroidal rotation velocities consists of simultaneously recording the emission lines from the plasma and from a calibration lamp by means of a double fiber-fiber guide.
	<ref>[http://link.aip.org/link/?RSINAK/77/033506/1 D. Rapisarda et al, ''Novel passive spectroscopy system for absolutely referenced plasma rotation measurements in clean plasmas'', Rev. Sci. Instrum. '''77''' (2006) 033506]</ref>		<ref>[http://link.aip.org/link/?RSINAK/77/033506/1 D. Rapisarda et al, ''Novel passive spectroscopy system for absolutely referenced plasma rotation measurements in clean plasmas'', Rev. Sci. Instrum. '''77''' (2006) 033506]</ref>

Alfonso at 14:43, 3 September 2009

2009-09-03T14:43:24Z

← Older revision		Revision as of 16:43, 3 September 2009
Line 1:		Line 1:
	[[Image:spectrometer-setup.png\|frame\|Observation geometry of the nine-channel high-resolution spectroscopic diagnostic system]]		[[Image:spectrometer-setup.png\|frame\|Observation geometry of the nine-channel high-resolution spectroscopic diagnostic system]]

	[[TJ-II]] disposes of an nine-channel, high-resolution, spectroscopic diagnostic system. This system is currently being used to measure impurity ion temperature and poloidal rotation using passive emission spectroscopy. The principal features of the diagnostic include independent focusing of its channels, high sensitivity for performing Doppler measurements in plasmas, as well as a flexible and fast in-house-developed software program for performing integrated data reduction and analysis.		[[TJ-II]] disposes of a nine-channel, high-resolution, spectroscopic diagnostic system. This system is currently being used to measure impurity ion temperature and poloidal rotation using passive emission spectroscopy. The principal features of the diagnostic include independent focusing of its channels, high sensitivity for performing Doppler measurements in plasmas, as well as a flexible and fast in-house-developed software program for performing integrated data reduction and analysis.
	<ref>[http://link.aip.org/link/?RSINAK/72/971/1 A. Baciero et al, ''A multi-channel spectroscopic system for measuring impurity ion temperatures and poloidal rotation velocities in TJ-II'', Rev. Sci. Instrum. '''72''' (2001) 971]</ref>		<ref>[http://link.aip.org/link/?RSINAK/72/971/1 A. Baciero et al, ''A multi-channel spectroscopic system for measuring impurity ion temperatures and poloidal rotation velocities in TJ-II'', Rev. Sci. Instrum. '''72''' (2001) 971]</ref>
	<ref>[http://www.new.ans.org/pubs/journals/fst/a_1264 B. Zurro et al, ''Comparison of Impurity Poloidal Rotation in ECRH and NBI Discharges of the TJ-II HELIAC'', Fusion Science and Technology '''50''', 3 (2006) 419-427]</ref>. This experimental system has been also used to measure proton rotation using spectral line emission from excited fast neutrals created from inner core plasma protons via charge exchange transfer reactions. <ref>[http://link.aip.org/link/?RSINAK/74/2056/1 B. Zurro et al, ''Investigation of proton rotation measurements using hydrogen line wings in the TJ-II stellarator'', Rev. Sci. Instrum. '''74''' (2003) 2056]</ref>		<ref>[http://www.new.ans.org/pubs/journals/fst/a_1264 B. Zurro et al, ''Comparison of Impurity Poloidal Rotation in ECRH and NBI Discharges of the TJ-II HELIAC'', Fusion Science and Technology '''50''', 3 (2006) 419-427]</ref>. This experimental system has been also used to measure proton rotation using spectral line emission from excited fast neutrals created from inner core plasma protons via charge exchange transfer reactions. <ref>[http://link.aip.org/link/?RSINAK/74/2056/1 B. Zurro et al, ''Investigation of proton rotation measurements using hydrogen line wings in the TJ-II stellarator'', Rev. Sci. Instrum. '''74''' (2003) 2056]</ref>

← Older revision		Revision as of 18:20, 3 April 2018
Line 4:		Line 4:

	[[TJ-II]] disposes of a nine-channel, high-resolution, spectroscopic diagnostic system. This system is currently being used to measure [[impurities\|impurity]] ion temperature and poloidal rotation using passive emission spectroscopy. The principal features of the diagnostic include independent focusing of its channels, high sensitivity for performing Doppler measurements in plasmas, as well as a flexible and fast in-house-developed software program for performing integrated data reduction and analysis.		[[TJ-II]] disposes of a nine-channel, high-resolution, spectroscopic diagnostic system. This system is currently being used to measure [[impurities\|impurity]] ion temperature and poloidal rotation using passive emission spectroscopy. The principal features of the diagnostic include independent focusing of its channels, high sensitivity for performing Doppler measurements in plasmas, as well as a flexible and fast in-house-developed software program for performing integrated data reduction and analysis.
	<ref>~~[http://link.aip.org/link/?RSINAK/72/971/1~~ A. Baciero et al, ''A multi-channel spectroscopic system for measuring impurity ion temperatures and poloidal rotation velocities in TJ-II'', Rev. Sci. Instrum. '''72''' (2001) 971]</ref>		<ref>A. Baciero et al, ''A multi-channel spectroscopic system for measuring impurity ion temperatures and poloidal rotation velocities in TJ-II'', [[doi:10.1063/1.1326008\|Rev. Sci. Instrum. '''72''' (2001) 971]]</ref>
	<ref>~~[http://www.new.ans.org/pubs/journals/fst/a_1264~~ B. Zurro et al, ''Comparison of Impurity Poloidal Rotation in ECRH and NBI Discharges of the TJ-II HELIAC'', Fusion Science and Technology '''50''', 3 (2006) 419-427]</ref>. This experimental system has also been used to measure proton rotation using spectral line emission from excited fast neutrals created from inner core plasma protons via charge exchange transfer reactions. <ref>~~[http://link.aip.org/link/?RSINAK/74/2056/1~~ B. Zurro et al, ''Investigation of proton rotation measurements using hydrogen line wings in the TJ-II stellarator'', Rev. Sci. Instrum. '''74''' (2003) 2056]</ref>		<ref>B. Zurro et al, ''Comparison of Impurity Poloidal Rotation in ECRH and NBI Discharges of the TJ-II HELIAC'', [http://www.new.ans.org/pubs/journals/fst/a_1264 Fusion Science and Technology '''50''', 3 (2006) 419-427]</ref>. This experimental system has also been used to measure proton rotation using spectral line emission from excited fast neutrals created from inner core plasma protons via charge exchange transfer reactions. <ref>B. Zurro et al, ''Investigation of proton rotation measurements using hydrogen line wings in the TJ-II stellarator'', [[doi:10.1063/1.1537035\|Rev. Sci. Instrum. '''74''' (2003) 2056]]</ref>

	== Toroidal rotation measurement ==		== Toroidal rotation measurement ==
Line 11:		Line 11:
	[[File:TJ-II McPherson.jpg\|300px\|thumb\|right\|The VUV spectrometer on TJ-II]]		[[File:TJ-II McPherson.jpg\|300px\|thumb\|right\|The VUV spectrometer on TJ-II]]
	A method for measuring absolutely calibrated toroidal rotation velocities consists of simultaneously recording the emission lines from the plasma and from a calibration lamp by means of a double fiber-fiber guide.		A method for measuring absolutely calibrated toroidal rotation velocities consists of simultaneously recording the emission lines from the plasma and from a calibration lamp by means of a double fiber-fiber guide.
	<ref>~~[http://link.aip.org/link/?RSINAK/77/033506/1~~ D. Rapisarda et al, ''Novel passive spectroscopy system for absolutely referenced plasma rotation measurements in clean plasmas'', Rev. Sci. Instrum. '''77''' (2006) 033506]</ref>		<ref>D. Rapisarda et al, ''Novel passive spectroscopy system for absolutely referenced plasma rotation measurements in clean plasmas'', [[doi:10.1063/1.2185507\|Rev. Sci. Instrum. '''77''' (2006) 033506]]</ref>
	The system has been mounted at φ = -9.45° ([[TJ-II:Sectors\|sector]] D8) and		The system has been mounted at φ = -9.45° ([[TJ-II:Sectors\|sector]] D8) and
	φ = 170.56° ([[TJ-II:Sectors\|sector]] B8).		φ = 170.56° ([[TJ-II:Sectors\|sector]] B8).
Line 18:		Line 18:

	A vacuum ultraviolet spectrometer has been operated on TJ-II since 1999. It is an f/10.4 1 m normal-incidence vacuum spectrometer equipped with interchangeable 1200 and 3600 lines mm<sup>-1</sup> gratings and a back-illuminated CCD camera with 400 × 1340 pixels (20 × 20 μm<sup>2</sup>). The instrument covers the wavelength range from ~20 to ~300 nm. It has been used to perform spectral surveys (identify and follow the evolution of plasma [[impurities]]), to obtain impurity ion temperatures, and to perform specialized studies (e.g. study fast oxygen ions present in plasmas during the neutral beam injection heating phase).		A vacuum ultraviolet spectrometer has been operated on TJ-II since 1999. It is an f/10.4 1 m normal-incidence vacuum spectrometer equipped with interchangeable 1200 and 3600 lines mm<sup>-1</sup> gratings and a back-illuminated CCD camera with 400 × 1340 pixels (20 × 20 μm<sup>2</sup>). The instrument covers the wavelength range from ~20 to ~300 nm. It has been used to perform spectral surveys (identify and follow the evolution of plasma [[impurities]]), to obtain impurity ion temperatures, and to perform specialized studies (e.g. study fast oxygen ions present in plasmas during the neutral beam injection heating phase).
	<ref>~~[http://dx.doi.org/10.1209/epl/i2003-00476-x~~ K.J. McCarthy, B. Zurro, R. Balbín, A. Baciero, J. Herranz, and I. Pastor, ''Results of an experiment relating apparent Doppler ion temperatures with non-thermal velocities in hot-fusion plasmas'', Europhys. Lett. '''63''' (2003) 49]</ref>		<ref>K.J. McCarthy, B. Zurro, R. Balbín, A. Baciero, J. Herranz, and I. Pastor, ''Results of an experiment relating apparent Doppler ion temperatures with non-thermal velocities in hot-fusion plasmas'', [[doi:10.1209/epl/i2003-00476-x\|Europhys. Lett. '''63''' (2003) 49]]</ref>
	<ref>~~[http://www.new.ans.org/store/j_548~~ K.J. McCarthy, M. A. Ochando, F. Medina, B. Zurro, C. Hidalgo, M. A. Pedrosa, I. Pastor, J. Herranz and A. Baciero, ''A First Study of Impurity Behavior During Externally Induced Radial Electric Fields in the TJ-II Stellarator'', Fusion Sci. & Tech. '''46''', 129-134 (2004)]</ref>		<ref>K.J. McCarthy, M. A. Ochando, F. Medina, B. Zurro, C. Hidalgo, M. A. Pedrosa, I. Pastor, J. Herranz and A. Baciero, ''A First Study of Impurity Behavior During Externally Induced Radial Electric Fields in the TJ-II Stellarator'', [http://www.new.ans.org/store/j_548 Fusion Sci. & Tech. '''46''', 129-134 (2004)]</ref>
	<ref>~~[http://dx.doi.org/10.1088/0953-4075/43/14/144020~~ K.J. McCarthy, V. Tribaldos, J. Arévalo, and M. Liniers, ''The detection of fast oxygen ions in neutral beam-heated plasmas of the TJ-II stellarator using spectroscopy methods'', J. Physics B: Atomic, Molecular and Optical Physics '''43''' (2010) 144020]</ref>		<ref>K.J. McCarthy, V. Tribaldos, J. Arévalo, and M. Liniers, ''The detection of fast oxygen ions in neutral beam-heated plasmas of the TJ-II stellarator using spectroscopy methods'', [[doi:10.1088/0953-4075/43/14/144020\|J. Physics B: Atomic, Molecular and Optical Physics '''43''' (2010) 144020]]</ref>

	== Charge exchange recombination spectroscopy ==		== Charge exchange recombination spectroscopy ==