Ultra-high vacuum line components

Weston, G.F.

doi:10.1016/0042-207x(84)90051-4

Cited by 9 publications

(3 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Для сравненияпоказатель преломления для большинства оптических стекол различных марок лежит в интервале 1,45…1,9. Давление пара олигоорганосилоксанов при нормальной температуре находится в диапазоне 10 -7 …10 -9 Па [8,10], что сравнимо с давлением в космосе на высоте 500 км -9×10 -7 Па. То есть олигоорганосилоксаны могут работать в космосе не испаряясь.…”

Section: M Berbekovunclassified

Possible Way to Protect Spacecraft Optics from Micrometeor Erosion

Fedorov,

Kokoev

2023

BRANS

View full text Add to dashboard Cite

There is a huge potential in Russia for the application of space technology in exploration, especially in the oil and gas sector. Images from space are a valuable source of information for geological predictions. How long can optics last in space and provide high-quality images when exposed to a micrometeor shower? The article proposes a new way to protect optical instruments from micrometeor erosion. The method is based on the use of a self-healing surface of a thin layer of a special liquid applied to the surface to be protected. Liquid resistant to solar and cosmic radiation. The implementation of the method is possible due to the physics of interfacial phenomena under microgravity conditions in space. The technical details of the proposal are being discussed.

show abstract

Section: M Berbekovunclassified

Possible Way to Protect Spacecraft Optics from Micrometeor Erosion

Fedorov,

Kokoev

2023

BRANS

View full text Add to dashboard Cite

show abstract

“…The sealing techniques and materials are also dependent on the vacuum range, torque, and the rotational speed at which the motion will be transmitted. Weston [33] has extensively reviewed valves and feedthroughs for ultrahigh vacuum applications.…”

Section: Valves and Motion Feedthroughsmentioning

confidence: 99%

Joints, Seals, and Valves

O’Hanlon¹

2003

A User's Guide to Vacuum Technology

View full text Add to dashboard Cite

In decades past, a discussion of joining and sealing techniques would have been incomplete without a description DeKhotinsky cement, Glyptal, and black wax. The times when valve stems were sealed with string soaked in grease have also passed. Materials technology has advanced to the place where glass-to-metal seals, demountable elastomer and metal-to-metal gaskets, brazed joints, welded joints, valves, and motion feedthroughs are catalog items. Reliable joints, seals, and components are so common that we take them for granted and sometimes contribute to their misuse. Occasionally we use a rubber hose as a flex connector, bake a brass valve, grease an elastomer static seal, bake Viton to an excessively high temperature, try to save money by reusing copper gaskets, or apply "stop leak" to a leaky weld. Singleton [l] remarked that in the early days of vacuum technique, some workers preferred the clear variety of Glyptal so as to hide their mistakes. Today's mistakes can be hidden with a degree of sophistication beneath vacuum epoxy and a coat of paint.In this chapter we review welded and brazed metal joints, metal, glass and ceramic joints, elastomer and metal sealed flanges, valves, and motion feedthroughs. We emphasize proper selection and use of joining and sealing techniques and not design. Roth has extensively reviewed sealing and joining techniques [2-41. PERMANENT JOINTSWelding, brazing and soldering are used to make permanent joints in vacuum chambers, pumping lines and components. The technique one chooses to use depends on the materials to be joined and on the thermal and vacuum environment to which the parts will be exposed. Welded joints of stainless steel, titanium or aluminum, flame-sealed glass joints, glass-tometal, and ceramic-to-metal joints are commonly used in high and ultrahigh vacuum system construction. 313A User's Guide to Vacuum Technology, 3rd Edition. John F. O'Hanlon

show abstract

“…This paper is designed to suggest the evaluation tool for PFE products, especially, in remote plasma and high temperature conditions for NT PFE and PO PFE which are major material in high temperature and/or plasma conditions in vacuum. [5][6][7][8] In order to investigate the remote plasma resistance and temperature resistance of PFE, we evaluated the weight loss and carried out the surface analysis using SEM (scanning electron microscope) after exposure in diverse gas and temperature conditions.…”

Section: Introductionmentioning

confidence: 99%

Weight Loss and Morphology of Nitrile Curable PFE and Peroxide Curable PFE after Exposing to NF3 and O2 Remote Plasmas

Lee¹,

Kim²

2011

View full text Add to dashboard Cite

The plasma resistances of nitrile curable perfluoro elastomer (NT PFE) and peroxide curable PFE (PO PFE) after exposing to NF 3 and O 2 remote plasmas were investigated by analyzing weight loss and morphology of O-ring made of PFE. The compounds were designed following the typical formulations of O-ring/seal which were applied in semiconductor and LCD production site. They were blended by an open roll mill, and then, O-ring was finally made by hot press molding and oven curing. The weight loss was calculated and morphology was observed for each atmosphere and temperature by a digital weighing machine and SEM. As results, it was confirmed the weight loss and related morphology were meaningfully different according to the cure type of PFE, filler system, and the species of remote plasma.

show abstract

Ultra-high vacuum line components

Cited by 9 publications

References 11 publications

Possible Way to Protect Spacecraft Optics from Micrometeor Erosion

Possible Way to Protect Spacecraft Optics from Micrometeor Erosion

Joints, Seals, and Valves

Weight Loss and Morphology of Nitrile Curable PFE and Peroxide Curable PFE after Exposing to NF3 and O2 Remote Plasmas

Contact Info

Product

Resources

About