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Instruments > In Situ/Laboratory Instruments > Chemical Meters/Analyzers > ClO/BrO

Preferred term

ClO/BrO  

Definition

  • Vacuum ultraviolet radiation produced in a low pressure plasma discharge lamp is used to induce resonance scattering in Cl and Br atoms within a flowing sample. ClO and BrO are converted to Cl and Br by the addition of NO such that the rapid bimolecular reaction ClO + NO → Cl + NO2 (BrO + NO → Br + NO2) yields one halogen atom for each halogen oxide radical present in the flowing sample. Three detection axes are used to diagnose the spatial (and thus temporal) dependence of the ClO (BrO) to Cl (Br) conversion and to detect any removal of Cl (Br) following its formation. A double duct system is used both to maintain laminar flow through the detection region and to step the flow velocity in the detection region down from free stream (200 m/sec) to 20 m/sec in order to optimize the kinetic diagnosis. (en)

Broader concept

Change note

  • 2022-04-18 12:21:11.0 [tstevens] Insert Concept add broader relation (ClO/BrO [d40b9033-af28-45bc-9d0e-fff5f0ae4aa4,894374] - Chemical Meters/Analyzers [3d25724b-832f-4a61-b0b2-4f2ccecdba94,885712]);
  • 2022-04-18 12:22:46.0 [tstevens] insert AltLabel (id: null category: primary text: Multiple Axis Resonance Fluorescence Chemical Conversion Detector for ClO and BrO language code: en); insert Definition (id: null text: Vacuum ultraviolet radiation produced in a low pressure plasma discharge lamp is used to induce resonance scattering in Cl and Br atoms within a flowing sample. ClO and BrO are converted to Cl and Br by the addition of NO such that the rapid bimolecular reaction ClO + NO → Cl + NO2 (BrO + NO → Br + NO2) yields one halogen atom for each halogen oxide radical present in the flowing sample. Three detection axes are used to diagnose the spatial (and thus temporal) dependence of the ClO (BrO) to Cl (Br) conversion and to detect any removal of Cl (Br) following its formation. A double duct system is used both to maintain laminar flow through the detection region and to step the flow velocity in the detection region down from free stream (200 m/sec) to 20 m/sec in order to optimize the kinetic diagnosis. language code: en);

URI

https://gcmd.earthdata.nasa.gov/kms/concept/d40b9033-af28-45bc-9d0e-fff5f0ae4aa4

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