Disposable Vacuum Viewport Protector

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Disposable Vacuum Viewport Protector

Princeton Docket #14-3022


Industry and research facilities face unwanted vacuum viewport coating issues. For example, during low temperature plasma experiments, metallic films can develop on vacuum viewports, obscuring observation. The impaired viewports can either be replaced, which is costly, or cleaned. The cleaning of viewports requires a sequence of time-consuming procedures and may not be able to fully recover the transparency of the viewports.


Researchers at the Princeton Plasma Physics Laboratory at Princeton University have developed a disposable vacuum viewport protector which provides an easy and economical solution to unwanted coating problems in vacuum systems. These inexpensive films are applied via a peel-and-stick mechanism similar to screen protectors for mobile phones.



·         Viewports for vacuum systems


·         Disposable

·         Inexpensive

·         Convenient

·         Easy to use

Princeton Plasma Physics Laboratory (PPPL)


The U.S. Department of Energy's Princeton Plasma Physics Laboratory (PPPL) is a Collaborative National Center for plasma and fusion science. Its primary mission is to develop the scientific understanding and the key innovations which will lead to an attractive fusion energy source. Associated missions include conducting world-class research along the broad frontier of plasma science and providing the highest quality of scientific education.




Yuan Shi is a third year PhD candidate at Princeton Plasma Physics Laboratory, Princeton University.  Mr. Shi received his BS degree from the University of Hong Kong with First Class Honours in 2012, where he studied physics, mathematics and chemistry. His various undergraduate research projects span from surface science to geometric quantization to synthetic organic chemistry.  While at Princeton, Mr. Shi developed an electronic system that can actively control instabilities in Hall Effect Thrusters under the supervision of Dr. Yevgeny Raitses. He also developed a novel laser diagnostic technique that enables fast measurements of time-dependent xenon ion velocity distribution function under the supervision of Dr. Ahmed Diallo. Currently, under the supervision of Professor William Tang and Dr. Bei Wang, he is developing a computational diagnostics software package for gyrokinetic simulations.

Yevgeny Raitses is Principal Research Physicist at Princeton Plasma Physics Laboratory (PPPL).  Dr. Raitses is an expert in experimental plasma physics and plasma diagnostics, and plasma applications.  He received his PhD from the Technion-Israel Institute of Technology in 1997. Since 1998, he has led the PPPL research programs on plasma thrusters and plasma-based synthesis of nanomaterials.  He holds US patents on Cylindrical Hall Thruster and Segmented Hall Thruster. Dr. Raitses is a Fellow of the American Physical Society and an Associate Fellow of the American Institute of Aeronautics and Astronautics. He serves also as a Senior Editor of IEEE Transactions on Plasma Science.

Intellectual Property Status


Patent protection is pending.

Princeton is seeking to identify appropriate partners for the further development and commercialization of this technology.


Michael Tyerech
Princeton University Office of Technology Licensing • (609) 258-6762•

Laurie Bagley
Princeton University Office of Technology Licensing • (609) 258-5579•



Patent Information:
For Information, Contact:
Michael Tyerech
former Princeton Sr. Licensing Associate
Princeton University
Yuan Shi
Yevgeny Raitses
plasma physics