TJ-II:Bolometry: Difference between revisions

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[[File:TJ-II_Bolometer.png|400px|thumb|right|The TJ-II bolometry system for tomographic reconstruction (sector B7)]]
[[File:TJ-II_Bolometer.png|400px|thumb|right|The TJ-II bolometry system for tomographic reconstruction ([[TJ-II:Sectors|sector]] B7, φ = 255.5 °)]]


TJ-II has several bolometry systems
TJ-II has several bolometry systems
<ref>[http://www.new.ans.org/pubs/journals/fst/a_1252 M.A. Ochando et al., ''Up-Down and In-Out Asymmetry Monitoring Based on Broadband Radiation Detectors'', Fusion Sci. Technol. '''50''', 313 (2006)]</ref>
<ref>M.A. Ochando et al., ''Up-Down and In-Out Asymmetry Monitoring Based on Broadband Radiation Detectors'', [http://www.new.ans.org/pubs/journals/fst/a_1252 Fusion Sci. Technol. '''50''', 313 (2006)]</ref>
<ref>[B. Zurro et al, ''Method to deduce local impurity transport quantities from the evolution of tomographically reconstructed bolometer signals during tracer injection at TJ-II'', Rev. Sci. Instrum. '''75''' (2004) 4231]</ref>
<ref>B. Zurro et al, ''Method to deduce local impurity transport quantities from the evolution of tomographically reconstructed bolometer signals during tracer injection at TJ-II'', [[doi:10.1063/1.1787585|Rev. Sci. Instrum. '''75''' (2004) 4231]]</ref>
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* Three 20-channel pinhole cameras in [[TJ-II:Sectors|sector]] B7, monitoring the same poloidal section and used for tomographic reconstructions <ref>[[EBITA]]</ref> of the total plasma emissivity. Signal names in the [[TJ-II:Shot_database|TJ-II database]]: 'BO101' ... 'BO120', 'BO201' ... 'BO220', 'BO301' ... 'BO320'.
* Three 20-channel pinhole cameras in [[TJ-II:Sectors|sector]] B7, monitoring the same poloidal section and used for tomographic reconstructions <ref>[[EBITA]]</ref><ref>[[TJ-II:Tomography]]</ref> of the total plasma emissivity. <ref>E. Barrera et al, ''Real-time data acquisition and parallel data processing solution for TJ-II Bolometer arrays diagnostic'', [[doi:10.1016/j.fusengdes.2006.04.046|Fusion Engineering and Design '''81''', Issues 15-17 (2006) 1863-1867]]</ref> Signal names in the [[TJ-II:Shot_database|TJ-II database]]: 'BO101' ... 'BO120', 'BO201' ... 'BO220', 'BO301' ... 'BO320'.
* Three 16-channel cameras in [[TJ-II:Sectors|sectors]] A2, C2, D2. Signal names in the [[TJ-II:Shot_database|TJ-II database]]: 'ABOL1' ... 'ABOL16', 'CBOL1' ... 'CBOL16', 'DBOL1' ... 'DBOL16'.  
* Three 16-channel cameras in [[TJ-II:Sectors|sectors]] A7, C2, D7. Signal names in the [[TJ-II:Shot_database|TJ-II database]]: 'ABOL1' ... 'ABOL16', 'CBOL1' ... 'CBOL16', 'DBOL1' ... 'DBOL16'.  
* Six global bolometry monitors. Signal names in the [[TJ-II:Shot_database|TJ-II database]]: 'BOL1', 'BOL3', 'BOL6'; 'BOL2', 'BOL5', 'BOL7'.
* Six global bolometry monitors. Signal names in the [[TJ-II:Shot_database|TJ-II database]]: 'BOL1', 'BOL3', 'BOL6'; 'BOL2', 'BOL5', 'BOL7'.
Bolometry has been used to classify radiation profiles into two categories: 'bell' and 'dome', related to impurity concentration inside the plasma. 'Bell'-type profiles are more robust against radiative collapse<ref>F.L. Tabarés et al, ''Plasma performance and confinement in the TJ-II stellarator with lithium-coated walls'', [[doi:10.1088/0741-3335/50/12/124051|Plasma Phys. Control. Fusion 50 (2008) 124051]]</ref>


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

Latest revision as of 14:32, 19 September 2026

The TJ-II bolometry system for tomographic reconstruction (sector B7, φ = 255.5 °)

TJ-II has several bolometry systems [1] [2]

  • Three 20-channel pinhole cameras in sector B7, monitoring the same poloidal section and used for tomographic reconstructions [3][4] of the total plasma emissivity. [5] Signal names in the TJ-II database: 'BO101' ... 'BO120', 'BO201' ... 'BO220', 'BO301' ... 'BO320'.
  • Three 16-channel cameras in sectors A7, C2, D7. Signal names in the TJ-II database: 'ABOL1' ... 'ABOL16', 'CBOL1' ... 'CBOL16', 'DBOL1' ... 'DBOL16'.
  • Six global bolometry monitors. Signal names in the TJ-II database: 'BOL1', 'BOL3', 'BOL6'; 'BOL2', 'BOL5', 'BOL7'.

Bolometry has been used to classify radiation profiles into two categories: 'bell' and 'dome', related to impurity concentration inside the plasma. 'Bell'-type profiles are more robust against radiative collapse[6]

References

  1. ↑ M.A. Ochando et al., Up-Down and In-Out Asymmetry Monitoring Based on Broadband Radiation Detectors, Fusion Sci. Technol. 50, 313 (2006)
  2. ↑ B. Zurro et al, Method to deduce local impurity transport quantities from the evolution of tomographically reconstructed bolometer signals during tracer injection at TJ-II, Rev. Sci. Instrum. 75 (2004) 4231
  3. ↑ EBITA
  4. ↑ TJ-II:Tomography
  5. ↑ E. Barrera et al, Real-time data acquisition and parallel data processing solution for TJ-II Bolometer arrays diagnostic, Fusion Engineering and Design 81, Issues 15-17 (2006) 1863-1867
  6. ↑ F.L. Tabarés et al, Plasma performance and confinement in the TJ-II stellarator with lithium-coated walls, Plasma Phys. Control. Fusion 50 (2008) 124051
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