[Triumf-seminars] TRIUMF Accelerator Seminar today at 14:00

TRIUMF Seminars triumf-seminars at lists.triumf.ca
Wed May 30 05:00:03 PDT 2018


Date/Time: Wed 2018-05-30 at 14:00

Location:  ISAC II Conf Room   

Speaker:   Kristina Zerbe (Goethe-Universität Frankfurt)

Title:     Pulsed Power for transient plasma and their applications

Abstract: Due to the minimisation and parallelisation of biotechnological sample processing wet-chemical
processes are reaching their limitations. Moreover, to avoid the usage of chemicals which are toxic
and complex in manufacturing and disposal, it is preferred to use more ecological and cheaper
techniques. One idea is the use of cold atmospheric plasma which are able to alter surfaces
depending on the working gas composition. The challenges hereby are the pulsed power electronics
and the understanding of the plasma chemistry. On the one hand, developing high voltage switches
based on semiconductors is difficult because of the destruction of semiconductors through high
voltages and high currents as well as the combination with appropriate cooling mechanisms.
Additionally, there are interferences of electronics due to high frequency radiation. On the other
hand, diagnostic techniques for cold plasma are still in development because this type of plasma
never reaches a thermal equilibrium. Furthermore, theoretical models which are describing the
mechanisms within the cold plasma are not yet completely developed.
The reason for further investigations of cold plasma is that several successful applications have
reached industrial processing and medical applications. For example, the plasma jet from the INP
Greifswald has been licensed for medical treatment, especially for injuries which need a sufficient
wound healing process. Also the industry uses cold plasma to modify glass or plastic surfaces like
googles or textiles. That is why cold plasma becomes more interesting when materials are thermal or
chemical instable or a specific localisation is necessary.

Stimulants available 15 minutes before the talk.

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General TRIUMF seminar information available at http://www.triumf.ca/home/upcoming-events/about-seminars-lectures



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