title: Construction of an Airborne Chemiluminescence Ozone Monitor for Volcanic Plumes
creator: Bräutigam, Ellen
subject: ddc-530
subject: 530 Physics
subject: ddc-540
subject: 540 Chemistry and allied sciences
description: Ozone plays an important role in volcanic plume chemistry, a particular process is its destruction by reactive halogen species, especially BrO. To better understand this chemical system, further measurements of the ozone concentration in volcanic plumes are needed. The usual UV absorption ozone monitors suffer from a severe interference with the high SO2 concentration in volcanic plumes. Therefore, we use the chemiluminescence method, which is based on the detection of photons emitted when ethylene is mixed with ozone containing air. This method has no interference with volcanic plume components, but ist field deployability is so far very limited, because the instruments are typically very heavy and bulky. This thesis reports the construction of a lightweight (< 1.5 kg) chemiluminescence ozone monitor, that can be mounted on a drone to be carried through volcanic plumes. The weight reduction was mainly achieved by using a modern photomultiplier module and omitting its cooling. In addition, the battery and ethylene storage container are easy to exchange between flights. This means that they can be quite small, as they only need to last for one flight. The flow rates and the dimension of the reaction chamber are optimized based on the calculation of the photon rate and a simulation of the photon trajectories.
date: 2022
type: Bachelor thesis
type: info:eu-repo/semantics/bachelorThesis
type: NonPeerReviewed
format: application/pdf
identifier: https://archiv.ub.uni-heidelberg.de/volltextserverhttps://archiv.ub.uni-heidelberg.de/volltextserver/32085/1/Bachelorthesis_Braeutigam_Ellen-2022.pdf
identifier: DOI:10.11588/heidok.00032085
identifier: urn:nbn:de:bsz:16-heidok-320856
identifier:   Bräutigam, Ellen  (2022) Construction of an Airborne Chemiluminescence Ozone Monitor for Volcanic Plumes.  [Bachelor thesis]     
relation: https://archiv.ub.uni-heidelberg.de/volltextserver/32085/
rights: info:eu-repo/semantics/openAccess
rights: http://archiv.ub.uni-heidelberg.de/volltextserver/help/license_urhg.html
language: eng