File:U.S. Department of Energy - Science - 212 001 001 (14541701831).jpg
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Summary
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| Description |
NEUTRAL MOLECULAR BEAM SURFACE PROBE. THE NEUTRAL MOLECULAR BEAM SURFACE PROBE IS A DEVICE THAT ALLOWS SECONDARY ION MASS SPECTROMETRY (SIMS) TO BE APPLIED EASILY TO ANALYZE NONCONDUCTING MATERIALS. THE PROBE SYSTEM PERMITS THE PRODUCTION OF HIGH ENERGY BEAMS OF THE NEGATIVE ION OF A MOLECULE OF SULPHUR HEXAFLUORIDE, A GAS COMMONLY USED IN THE ELECTRICAL AND REFRIGERATION INDUSTRIES. THESE NEGATIVE IONS CAN BE ACCELERATED TO HIGH ENERGY BY ELECTRIC FIELDS JUST AS POSITIVE IONS, AND A SHORT TIME AFTER ACCELERATION THEY BEGIN TO SPONTANEOUSLY EJECT THE EXTRA ELECTRON. SINCE THE INTERNAL VIBRATIONS OF THE MOLECULE CAUSE THE ELECTRON TO BE EJECTED, THE BEAM IS NOT DE-FOCUSED BY THIS STEP. THE REMAINING CHARGED PARTICLES AND ELECTRONS CAN BE SKIMMED OFF ELECTRICALLY OR MAGNETICALLY, AND THE RESULTING BEAM IS COMPOSED OF ONLY HIGH-ENERGY, ELECTRICALLY NEUTRAL MOLECULES. THE NEUTRAL MOLECULAR BEAM SURFACE PROBE WILL BE IMPORTANT TO ADVANCES IN POLYMER DEVELOPMENT, COMPOSITE MATERIALS, AND BIOTECHNOLOGY. For more information or additional images, please contact 202-586-5251. |
| Date | |
| Source | 212 001 001 |
| Author | U.S. Department of Energy from United States |
Licensing
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This image is a work of a United States Department of Energy (or predecessor organization) employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, the image is in the public domain.
Please note that national laboratories operate under varying licences and some are not free. Check the site policies of any national lab before crediting it with this tag.
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This image was originally posted to Flickr by U.S. Department of Energy at https://flickr.com/photos/37916456@N02/14541701831. It was reviewed on 22 November 2017 by FlickreviewR 2 and was confirmed to be licensed under the terms of the United States Government Work. |
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| current | 00:16, 22 November 2017 | | 3,200 × 2,560 (729 KB) | Rudolphous (talk | contribs) | Transferred from Flickr via Flickr2Commons |
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