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Title: Air bearing vacuum seal assembly

Abstract

An air bearing vacuum seal assembly capable of rotating at the speed of several thousand revolutions per minute using an air cushion to prevent the rotating and stationary parts from touching, and a two stage differential pumping arrangement to maintain the pressure gradient between the air cushion and the vacuum so that the leak rate into the vacuum is, for example, less than 1 .times. 10.sup.-4 Pa m.sup.3 /s. The air bearing vacuum seal has particular application for mounting rotating targets to an evacuated accelerator beam tube for bombardment of the targets with high-power charged particle beams in vacuum.

Inventors:
 [1]
  1. Livermore, CA
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
863195
Patent Number(s):
4118042
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Classifications (CPCs):
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
F - MECHANICAL ENGINEERING F16 - ENGINEERING ELEMENTS AND UNITS F16C - SHAFTS
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
air; bearing; vacuum; seal; assembly; capable; rotating; speed; thousand; revolutions; minute; cushion; prevent; stationary; touching; stage; differential; pumping; arrangement; maintain; pressure; gradient; leak; rate; example; times; 10; -4; particular; application; mounting; targets; evacuated; accelerator; beam; tube; bombardment; high-power; charged; particle; beams; air bearing; accelerator beam; leak rate; particular application; seal assembly; particle beam; charged particle; particle beams; vacuum seal; bearing vacuum; air cushion; assembly capable; pressure gradient; differential pump; /277/313/376/384/

Citation Formats

Booth, Rex. Air bearing vacuum seal assembly. United States: N. p., 1978. Web.
Booth, Rex. Air bearing vacuum seal assembly. United States.
Booth, Rex. Sun . "Air bearing vacuum seal assembly". United States. https://www.osti.gov/servlets/purl/863195.
@article{osti_863195,
title = {Air bearing vacuum seal assembly},
author = {Booth, Rex},
abstractNote = {An air bearing vacuum seal assembly capable of rotating at the speed of several thousand revolutions per minute using an air cushion to prevent the rotating and stationary parts from touching, and a two stage differential pumping arrangement to maintain the pressure gradient between the air cushion and the vacuum so that the leak rate into the vacuum is, for example, less than 1 .times. 10.sup.-4 Pa m.sup.3 /s. The air bearing vacuum seal has particular application for mounting rotating targets to an evacuated accelerator beam tube for bombardment of the targets with high-power charged particle beams in vacuum.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1978},
month = {1}
}

Patent:

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