{"id":1707,"date":"2016-04-04T19:14:59","date_gmt":"2016-04-05T02:14:59","guid":{"rendered":"http:\/\/www.rbdinstruments.com\/blog\/?p=1707"},"modified":"2016-04-04T19:14:59","modified_gmt":"2016-04-05T02:14:59","slug":"04-202-sed-detector-flange","status":"publish","type":"post","link":"https:\/\/www.rbdinstruments.com\/blog\/04-202-sed-detector-flange\/","title":{"rendered":"04-202 SED detector flange"},"content":{"rendered":"

The model 97 SED preamp which is used on PHI scanning auger surface analysis systems converts secondary electron current into a video signal. It is designed so that it can be mounted onto a vacuum flange which houses a Channeltron electron multiplier.\u00a0\u00a0 \u00a0The 97 SED preamp housing is made of aluminum and if extreme care is not taken when mounting or removing the preamp from the detector flange it is possible to crack one of the three electrical feedthroughs. The picture below shows a broken connector on a 04-202 SED detector flange.<\/p>\n

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One of the difficulties of mounting the 97 SED preamp to the detector flange is that you can\u2019t really see what you are doing as you slide the preamp over the flange.\u00a0\u00a0 There are three larger holes inside the 97 SED preamp mount which go over the electrical feedthroughs on the flange.\u00a0\u00a0 It is important that the electrical feedthroughs clear the holes on the 97 SED preamp mount and that the preamp is flush on the flange before the mounting screws are tightened. The mouthing screws should be tightened finger tight while holding the 97 SED preamp firmly against the flange, and then a little bit tighter which a screwdriver.<\/p>\n

One way to make sure that the feedthroughs are not touching the holes in the preamp mount is to take the cover off the 97 SED before you mount it, and then put the cover back on after the preamp has been mounted.<\/p>\n

Or, you can replace the cover with a piece of Plexiglas.\u00a0\u00a0 In the pictures below I have modified a 97 SED preamp by removing the cover and using the cover as a template to mark a piece of Plexiglas so that it is the same size as the original cover. I drilled holes in the Plexiglas and then mounted it on the 97 SED preamp.<\/p>\n

With a clear Plexiglas cover on the 97 SED preamp it is very easy to install the preamp onto the 04-202 SED detector flange with less chance of breaking one of the feedthroughs. And the Plexiglas still provides user protection from the high voltage which is present during normal operation of the preamp.<\/p>\n

So whether you remove the cover when mounting the 97 SED preamp and then re-install the cover, or replace the metal cover with a Plexiglas one, by being able to see the feedthroughs as you install the 97 SED preamp you can safely mount the preamp with less risk of damage to the 04-202 detector flange.<\/p>\n

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The model 97 SED preamp which is used on PHI scanning auger surface analysis systems converts secondary electron current into a video signal. It is designed so that it can be mounted onto a vacuum flange which houses a Channeltron … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":1715,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","footnotes":"","jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[164],"tags":[213,214],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2016\/04\/97-sed-feedthroughs1.jpg?fit=972%2C648&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p2DEXo-rx","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"jetpack-related-posts":[{"id":860,"url":"https:\/\/www.rbdinstruments.com\/blog\/how-to-test-a-97-sed-preamplifier\/","url_meta":{"origin":1707,"position":0},"title":"How to test a 97 SED preamplifier","author":"Randy","date":"November 8, 2013","format":false,"excerpt":"Older PHI scanning auger systems use the model 97 SED preamplifier to obtain secondary electron images. Occasionally you will not be able to get a TV image on your scanning auger system but are not sure what the problem is. This post will explain how to test the 97 SED\u2026","rel":"","context":"In "Operation and Calibration Procedures"","block_context":{"text":"Operation and Calibration Procedures","link":"https:\/\/www.rbdinstruments.com\/blog\/category\/operation-and-calibration-procedures\/"},"img":{"alt_text":"97-sed-col-tab","src":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2013\/11\/97-sed-col-tab.jpg?fit=401%2C266&ssl=1&resize=350%2C200","width":350,"height":200},"classes":[]},{"id":1211,"url":"https:\/\/www.rbdinstruments.com\/blog\/multi-channel-detector-continuity-tests\/","url_meta":{"origin":1707,"position":1},"title":"Multi channel detector continuity tests","author":"Randy","date":"September 11, 2014","format":false,"excerpt":"The multi channel detector (MCD) assembly found on Physical Electronics 5500 through 5800 X-ray photoelectron spectroscopy (XPS) systems comprises two pieces \u2013 the channel plate assembly and the connection flange. If you follow the procedure in the 10-360 spherical capacitive analyzer manual you can replace the channel plates (Chevron type)\u2026","rel":"","context":"In "General Optics and Vacuum"","block_context":{"text":"General Optics and Vacuum","link":"https:\/\/www.rbdinstruments.com\/blog\/category\/general-optics-and-vacuum\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2014\/09\/MCD-plates-oreintation1.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":1519,"url":"https:\/\/www.rbdinstruments.com\/blog\/660-scanning-auger-bake-out-procedure\/","url_meta":{"origin":1707,"position":2},"title":"660 Scanning Auger Bake-out procedure","author":"Randy","date":"June 15, 2015","format":false,"excerpt":"660 Scanning Auger Bake-out procedure. This procedure is written for the PHI 660 scanning Auger system but also works for the 600 scanning Auger systems as well. Ion pumps must be on and the system vacuum should be in the mid to low 10-7 range (or better).. Make sure that\u2026","rel":"","context":"In "General Optics and Vacuum"","block_context":{"text":"General Optics and Vacuum","link":"https:\/\/www.rbdinstruments.com\/blog\/category\/general-optics-and-vacuum\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":3199,"url":"https:\/\/www.rbdinstruments.com\/blog\/72-100-electron-multiplier-supply-notes\/","url_meta":{"origin":1707,"position":3},"title":"72-100 Electron Multiplier Supply Notes","author":"Randy","date":"April 2, 2021","format":false,"excerpt":"Notes on to test and repair the 72-100 electron multiplier supply used on older PHI Auger systems.","rel":"","context":"In "General Optics and Vacuum"","block_context":{"text":"General Optics and Vacuum","link":"https:\/\/www.rbdinstruments.com\/blog\/category\/general-optics-and-vacuum\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2021\/04\/Extended-72-100-board.jpg?fit=1200%2C1200&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2021\/04\/Extended-72-100-board.jpg?fit=1200%2C1200&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2021\/04\/Extended-72-100-board.jpg?fit=1200%2C1200&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2021\/04\/Extended-72-100-board.jpg?fit=1200%2C1200&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":1779,"url":"https:\/\/www.rbdinstruments.com\/blog\/72-100-voltage\/","url_meta":{"origin":1707,"position":4},"title":"72-100 voltage","author":"Randy","date":"June 2, 2016","format":false,"excerpt":"I recently encountered an unusual problem on two different 660 scanning auger systems within a period of a few months where the 72-100 multiplier voltage would drop off after a period of time. On one system the 97 SED preamp would fail after a few minutes of warm up time,\u2026","rel":"","context":"In "Operation and Calibration Procedures"","block_context":{"text":"Operation and Calibration Procedures","link":"https:\/\/www.rbdinstruments.com\/blog\/category\/operation-and-calibration-procedures\/"},"img":{"alt_text":"72-100 mother board","src":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2016\/06\/72-100-mother-board.jpg?fit=774%2C1032&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2016\/06\/72-100-mother-board.jpg?fit=774%2C1032&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2016\/06\/72-100-mother-board.jpg?fit=774%2C1032&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":1393,"url":"https:\/\/www.rbdinstruments.com\/blog\/amplifier-discriminator-tests\/","url_meta":{"origin":1707,"position":5},"title":"Amplifier Discriminator Tests","author":"Randy","date":"March 9, 2015","format":false,"excerpt":"One of the troubleshooting techniques that can be used to test the counting circuitry of an auger or XPS system is called \u201ctickling the brick\u201d.\u00a0\u00a0 The term came about from when the early PHI systems used the Princeton Applied Research (PAR) 1120 amplifier discriminator for pulse count detection of electrons.\u2026","rel":"","context":"In "General Optics and Vacuum"","block_context":{"text":"General Optics and Vacuum","link":"https:\/\/www.rbdinstruments.com\/blog\/category\/general-optics-and-vacuum\/"},"img":{"alt_text":"amplifier-discriminator","src":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2015\/03\/1120-amplifier-discriminator.jpg?fit=536%2C263&ssl=1&resize=350%2C200","width":350,"height":200},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/1707"}],"collection":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/comments?post=1707"}],"version-history":[{"count":1,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/1707\/revisions"}],"predecessor-version":[{"id":1719,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/1707\/revisions\/1719"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/media\/1715"}],"wp:attachment":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/media?parent=1707"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/categories?post=1707"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/tags?post=1707"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}