{"id":3230,"date":"2022-03-10T06:39:22","date_gmt":"2022-03-10T06:39:22","guid":{"rendered":"\/?p=3230"},"modified":"2022-03-10T06:57:30","modified_gmt":"2022-03-10T06:57:30","slug":"comment-on-exploding-wire-and-electron-beam-vaporization-studies-of-electric-polarizabiltiies","status":"publish","type":"post","link":"\/?p=3230","title":{"rendered":"Comment on exploding wire and electron beam vaporization studies of electric polarizabiltiies"},"content":{"rendered":"

Dynamic dipole polarizability of gold and copper atoms for 532- and 1064-nm wavelengths<\/strong>
\nhttps:\/\/www.researchgate.net\/publication\/330219250_Dynamic_dipole_polarizability_of_gold_and_copper_atoms_for_532-_and_1064-nm_wavelengths\/comments<\/a><\/p>\n

I wrote to Gennady Sarkisov on ResearchGate about your work just now.\u00a0 I was reading his Jan 2019 paper “Dynamic dipole polarizability of gold and copper atoms for 532- and 1064-nm wavelengths” at<\/p>\n

https:\/\/www.researchgate.net\/publication\/330219250_Dynamic_dipole_polarizability_of_gold_and_copper_atoms_for_532-_and_1064-nm_wavelengths\/comments<\/a> and left him this comment.<\/p>\n

——————–\u00a0 My comment on ResearchGate ———————————–<\/p>\n

I just happened to chat with Agustin Cruz, and others, yesterday about his electron beam 3D printer.\u00a0 Here is a description of his work at https:\/\/hackaday.io\/project\/183736-3d-metal-printer<\/a><\/p>\n

The transcript of our chat is at https:\/\/hackaday.io\/event\/184160-metal-3d-printing-hack-chat\/log\/203868-hack-chat-transcript-part-1<\/a><\/p>\n

And a video of his printer in operation is at https:\/\/www.youtube.com\/watch?v=hnYU1hB2ZDA<\/a><\/p>\n

You are vaporizing a fairly substantial amount of material with your exploding wire.\u00a0 His electron beam is 100 Watts. The important parameter for data gathering is beam intensity, not total current.\u00a0 You have to do things in nanoseconds or smaller.\u00a0 His device could give you leisure to follow a continuous line of vaporized metal as long as you like.\u00a0 He said he can use it as a microscope as well.\u00a0 So you can correlate the track shape after the fact with the recorded spectrum, voltage, current and transmitted stress (sensors on the material as it is being scanned).\u00a0 That should give you plenty to work with.<\/p>\n

I was re-reading Keith Bonin and Vitaly Kresins “Electric Diplole Polarizabilities of Atoms, Molecules and Clusters” this evening when I decided to see who might be doing electric quadrupole work.\u00a0 It is not quite the desert you indicate, but the data and methods and such ARE very scattered and disorganized.\u00a0 I mention this, because ALL orders of the polarizability could be documented in a consistent manner, open to all, and used for calibration and inter-group collaborations.<\/p>\n

If it were me, I would set the beam scanning over gold, aluminum, copper, tungsten, vanadium, tantalum, cobalt, beryllium, boron, carbon, silicon nitride, wood, proteins, plastics, rubbers, coal and other common materials.\u00a0 Document their emissions (for monitoring and identification during metal forming) and for characterizing unknown materials in an online shared database open to all.\u00a0 Run some continuously as a resource for global collaboration, training and algorithm development.<\/p>\n

Agustin might be able to do that as a service to support his work on 3D electron beam metal forming.\u200b<\/p>\n

Richard Collins, Director, The Internet Foundation<\/p>\n","protected":false},"excerpt":{"rendered":"

Dynamic dipole polarizability of gold and copper atoms for 532- and 1064-nm wavelengths https:\/\/www.researchgate.net\/publication\/330219250_Dynamic_dipole_polarizability_of_gold_and_copper_atoms_for_532-_and_1064-nm_wavelengths\/comments I wrote to Gennady Sarkisov on ResearchGate about your work just now.\u00a0 I was reading his Jan 2019 paper “Dynamic dipole polarizability of gold and copper atoms for 532- and 1064-nm wavelengths” at https:\/\/www.researchgate.net\/publication\/330219250_Dynamic_dipole_polarizability_of_gold_and_copper_atoms_for_532-_and_1064-nm_wavelengths\/comments and left him this comment. ——————–\u00a0 My
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