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Communication Dans Un Congrès Année : 2016

Creation of a control system for plasma delivery to increase determinism and robustness while processing using an ICP torch

Résumé

The Cranfield University Precision Engineering Institute team has created a unique plasma figuring capability to correct large optical surfaces at atmospheric pressure. In the context of ever increasing dimensions of optical components, there is a need for improving the robustness and securing the performance of our Plasma Delivery System (PDS). The current PDS is based on an inductive output L type RF circuit, Inductively Coupled Plasma (ICP) torch and computer numerically controlled (CNC) motion system. The combination of optical component surface areas and the nature of the sub-aperture plasma tool lead to significant processing duration. This atmospheric pressure processing environment is more cost-effective than vacuum chamber based ones which are often used by competitors. However it requires deep awareness and fine understanding of technologies used. Based on the knowledge acquired for the past eight years, we have created a smart control system for our unique PDS that equips a machine called Helios1200. This novel control system aims at securing the process determinism and assisting the machine operator by tuning some key electrical components of the RF network and monitoring some processing parameters. Furthermore, specific assistance is provided during the different phases of the plasma processing. This paper describes the main design aspects.
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Dates et versions

hal-02388782 , version 1 (02-12-2019)

Identifiants

  • HAL Id : hal-02388782 , version 1

Citer

Hui Zhou, Renaud Jourdain, Vincent Serantoni, Jose Endrino Armenteros, Paul Shore. Creation of a control system for plasma delivery to increase determinism and robustness while processing using an ICP torch. 16th International Conference of the European Society for Precision Engineering and Nanotechnology, May 2016, Nottingham, United Kingdom. ⟨hal-02388782⟩
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