Advanced Non-Equilibrium Plasma Diagnostic

In the last two decades a rapid increase in research on nonequilibrium atmospheric-pressure discharges has occurred.  Applications covers the fields of material science, plasma assisted combustion, plasma medicine. The different devices used (surface discharge, jets, microdischarge) are strongly influenced by several processes, and show a transient behaviour strongly influenced by collisions.

In the presence of such characteristics, the development and deployment of optical diagnostics is an essential tools for the understanding of microscopic processes and the development of new innovative plasma tools.

In our lab the diagnostics tools available are the following:

Optical diagnostic techniques

Time-resolved imaging, on the nanosecond and sub-nanosecond  time scale, is used to visualize the breakdown mechanism in the streamer case or in the ‘plasma bullet’ propagation.  In the picture The ionization wave propagation in a nanosecond  volume discharge.

Surface DBD  single streamer nanosecond discharge.

Time and spatially resolved optical emission spectroscopy (TROES) reaching time resolution down to tens of ps.

TROES

Laser-based techniques (laser-induced fluorescence )(LIF), OODR LIF, TALIF .

The LIF techinique can be succesfully applied to monitor radicals , metastable with a time and spatial resolution limited by the laser characteristics,  and high sensitivity.

Laser-based techniques

Absorption based techniques, in its various versions of resonant, broad-band (BBAS), cavity enhanced (CEAS), cavity ring-down (CRDS).

Absorption based techniques

The quantities accessible to spectroscopic diagnostics are gas temperature, electron density, electric field and density of transient species, i.e. radicals and electronic metastable states.

Moreover  kinetics study of transient species can be perfomed and the experimental data used as input for computer modelling of the discharge kinetics.

Our experience in the discharge design enable us to apply the above mentioned techniques in specially designed discharges,  such as single streamer volume/surface dielectric barrier discharges (DBDs). Nevertheless our diagnostics tools can also be used in applicative systems.

Electrical characterizations.

Together with the above mentioned optical techiniques a ful set of electrical characterization tecniques is available including langmuir probes for electron density measurements,.

Acknowledgment.

Part of the experimental investigation reported in this page was perfomed in collaboration of dr. Milan Simek of the Institute of PlasmaPhysics Czech Academy of Science.  (Nanosecond streamer discharge) .

Selected Publications

Facilities & Labs

Energy Transfer in Plasmas @ Bari

People

PaoloFrancesco_AmbricoPaolo Francesco

Ambrico

CNR Researcher

Viso_UomoGiorgio

Dilecce

CNR Researcher

Publications

  1. Dilecce G., Optical spectroscopy diagnostics of discharges at atmospheric pressure, Plasma Sources Science and Technology Volume 23, Issue 1, February 2014, DOI: 1088/0963-0252/23/1/015011
  2. Martini, L.M., Dilecce, G., Guella, G., Maranzana A., Tonachini, G., Tosi, P., Oxidation of CH4 by CO2 in a dielectric barrier discharge, Chemical Physics Letters 593, pp. 55-60 (2014) DOI: 1016/j.cplett.2013.12.069
  3. Martini LM , Dilecce G , Scotoni M, Tosi P, De Benedictis S, OH Density Measurements by Time-Resolved Broad Band Absorption Spectroscopy in a He-H2O Dielectric Barrier Discharge With Small O-2 Addition, PLASMA PROCESSES AND POLYMERS Volume: 13   Issue: 2   Pages: 298-299   (2016) DOI:1002/ppap.201500020
  4. Dilecce, G., Martini, L.M., Tosi, P., Scotoni, M., De Benedictis, S., Laser induced fluorescence in atmospheric pressure discharges, Plasma Sources Science and Technology 24 (3), 034007 (2015) DOI: 10.1088/0963-0252/24/3/034007
  5. Simek, M.; Ambrico, P. F.; Prukner, V., LIF study of N-2(A(3)Sigma (+)(u), v=0-10) vibrational kinetics under nitrogen streamer conditions, JOURNAL OF PHYSICS D-APPLIED PHYSICS Volume: 48   Issue: 26     Article Number: 265202  (2015) DOI:1088/0022-3727/48/26/265202
  6. Ambrico P.F., Ambrico M., Schiavulli L., De Benedictis S., 2D Thermoluminescence imaging of dielectric surface long term charge memory of plasma surface interaction in DBD discharges, JOURNAL OF PHYSICS D-APPLIED PHYSICS   Volume: 47   Issue: 30     Article Number: 305201 (2014) DOI:1088/0022-3727/47/30/305201
  7. Ries D., Dilecce G., Robert E., Ambrico P.F., Ambrico M., Dozias S., Pouvesle J.M., LIF and fast imaging plasma jet characterization relevant for NTP biomedical applications, JOURNAL OF PHYSICS D-APPLIED PHYSICS Volume: 47   Issue: 27  Article Number: 275401 (2014) DOI:1088/0022-3727/47/27/275401
  8. Ratynskaia, S.; Dilecce, G.; Tolias, P, Nitrogen optical emission during nanosecond laser ablation of metals: prompt electrons or photo-ionization?, APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING Volume: 117   Issue: 1   Pages: 409-413  (2014) DOI:1007/s00339-014-8534-9

Projects

APULIA SPACE: Esperti nell’uso di tecnologia abilitanti nel settore dello spazio,  PON03PE_00067_6, (2014-2016)

Latest News

La settimana del rosa digitale - 4^ed

La settimana del rosa digitale - 4^ed

 

Percorso di condivisione della carriera di scienziato-donna fatto attraverso esperimenti di estrazione di sostanze chimiche partendo dal cibo.

11 e 15 marzo 2019

Via Marconi,39 - Casamassima Bari 70010

Che “cavolo" di arcobaleno-mamme e scienza un viaggio alla scoperta di cio’ che Madre Natura ci insegna.

con Eloisa Sardella (CNR Nanotec) e Laura Rosso (PSP)

maggiori info:

TERAMETANANO - International Conference on Terahertz Emission, Metamaterials and Nanophotonics

TERAMETANANO - IV ed.

Castello Carlo V, Lecce 27 -31 Maggio 2019

The IV edition of TERAMETANANO, the International Conference on Terahertz Emission, Metamaterials and Nanophotonics, will take place in Lecce (Italy) from 27 to 31 of May 2019 in the 16th-century Castle of Charles V   with two special nights that will be held in an original Theatre of Roman period.

 

TERAMETANANO is an annual conference that gather physicists studying a wide variety of phenomena in the areas of nano-structuresnano-photonics and meta-materials, with special attention to the coupling between light and matter and in a broad range of wavelengths, going from the visible up to the terahertz.

 

Al via la fase 2 del Tecnopolo per la medicina di precisione

Firmata convenzione tra Regione, Università e Cnr per avvio seconda fase del Tecnopolo

Bari, 27 novembre 2018 

Sottoscritto stamane l’accordo tra Regione PugliaCnr Consiglio nazionale delle ricerche, Irccs Giovanni Paolo II di Bari e Università di Bari per l’avvio della seconda fase del Tecnopolo per la Medicina di Precisione. Sede del tecnopolo, il CnrNanotec.

“La sfida della medicina moderna è tradurre nella pratica clinica gli enormi progressi compiuti dalla scienza e dalla tecnologia. In questo contesto le nanotecnologie, focalizzate sull’indagine e sulla manipolazione della materia a livello nanometrico-molecolare, si presentano come uno strumento potentissimo al servizio della medicina di precisione, la nuova frontiera che punta allo sviluppo di trattamenti personalizzati per il singolo paziente”, afferma  Giuseppe Gigli, direttore di Cnr Nanotec e coordinatore del Tecnopolo.

Link video dichiarazione Massimo Inguscio: http://rpu.gl/uChUl

Link video di presentazione Tecnomed: http://rpu.gl/Qqerm

Link video dichiarazione Michele Emiliano: http://rpu.gl/aJoee