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<div dir="ltr" data-setdir="false">Here are two videos which may help you visualize what's happening in a Hall Effect thruster:</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false"><a href="https://www.youtube.com/watch?v=bHunhXk9i2s" rel="nofollow" target="_blank">https://www.youtube.com/watch?v=bHunhXk9i2s</a> <br></div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false"><a href="https://www.youtube.com/watch?v=mAfjmGMp43w" rel="nofollow" target="_blank" class="">https://www.youtube.com/watch?v=mAfjmGMp43w</a><br></div><div><br></div><div><br></div><div dir="ltr" data-setdir="false">Ted's explanation will fill in the remaining details, I think.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">-- Bob Primak</div><div dir="ltr" data-setdir="false"><br></div><div><br></div><div><br></div><div><br></div><div><br></div>
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On Wednesday, October 11, 2023 at 04:28:00 PM EDT, John Rudy via LCTG <lctg@lists.toku.us> wrote:
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--></style><div><div class="yiv5962825810WordSection1"><p class="yiv5962825810MsoNormal"><span style="font-size:14.0pt;font-family:Arial, sans-serif;">I just read this 3 times and still don’t understand it. Of course there is a sentence in the middle that reminds me of my high school teacher’s “the proof will be left to the reader”.</span></p><p class="yiv5962825810MsoNormal"><span style="font-size:14.0pt;font-family:Arial, sans-serif;">John</span></p><p class="yiv5962825810MsoNormal"><span style="font-size:12.0pt;font-family:Arial, sans-serif;">================================================== </span></p><p class="yiv5962825810MsoNormal"><span style="font-size:12.0pt;font-family:Arial, sans-serif;"> </span></p><p style="margin-bottom:8.4pt;line-height:22.5pt;background:white;vertical-align:baseline;" class="yiv5962825810MsoNormal"><b><span style="font-size:18.0pt;font-family:Open Sans, sans-serif;color:#333333;">Sci-fi propulsion is now a reality</span></b></p><p style="margin-bottom:12.0pt;background:white;vertical-align:baseline;" class="yiv5962825810MsoNormal"><span style="font-size:12.0pt;font-family:Open Sans, sans-serif;color:#333333;">David Oh, chief engineer for operations at NASA's Jet Propulsion Laboratory says this will be the first-ever mission to use Hall Effect thrusters in interplanetary space. What does that mean? Well basically, Hall Effect thrusters use electricity to ionize xenon gas — ionization refers to removing or adding one or two electrons from the atoms that make up a substance. In this case, the substance is a gas. </span></p><p style="margin-bottom:12.0pt;background:white;vertical-align:baseline;" class="yiv5962825810MsoNormal"><span style="font-size:12.0pt;font-family:Open Sans, sans-serif;color:#333333;">Upon ionization, those atoms gain a charge. (Regular old atoms have neutral charges because their positive proton count and negative electron count are equal. Remove some electrons, for instance, and you lose some negativity.) The result? Ions. Then, those charged ions form an electric field which can, through a series of complicated steps, propel an object. In this case, that's the Psyche spacecraft. </span></p><p style="margin-bottom:12.0pt;background:white;vertical-align:baseline;" class="yiv5962825810MsoNormal"><span style="font-size:12.0pt;font-family:Open Sans, sans-serif;color:#333333;">"They come out of the thruster going at 15 kilometers per second, or nine miles per second," Oh said. "That's five times faster than the speed of the fuel coming out of a regular chemical rocket."</span></p><p class="yiv5962825810MsoNormal"><span style="font-size:12.0pt;font-family:Arial, sans-serif;"> </span></p><p class="yiv5962825810MsoNormal"><span style="font-size:12.0pt;font-family:Arial, sans-serif;"> </span></p><p class="yiv5962825810MsoNormal"><span style="font-size:10.0pt;font-family:Arial, sans-serif;">John Rudy</span></p><p class="yiv5962825810MsoNormal"><span style="font-size:10.0pt;font-family:Arial, sans-serif;"> </span></p><p class="yiv5962825810MsoNormal"><span style="font-size:10.0pt;font-family:Arial, sans-serif;">781-861-0402</span></p><p class="yiv5962825810MsoNormal"><span style="font-size:10.0pt;font-family:Arial, sans-serif;">781-718-8334 cell</span></p><p class="yiv5962825810MsoNormal"><span style="font-size:10.0pt;font-family:Arial, sans-serif;">13 Hawthorne Lane</span></p><p class="yiv5962825810MsoNormal"><span style="font-size:10.0pt;font-family:Arial, sans-serif;">Bedford MA</span></p><p class="yiv5962825810MsoNormal"><span style="font-size:10.0pt;font-family:Arial, sans-serif;"><a rel="nofollow noopener noreferrer" ymailto="mailto:jjrudy1@comcast.net" target="_blank" href="mailto:jjrudy1@comcast.net">jjrudy1@comcast.net</a></span></p><p class="yiv5962825810MsoNormal"><img border="0" width="124" height="115" style="width:1.2916in;min-height:1.1927in;" id="yiv5962825810Picture_x0020_1" src="cid:M039KlNgp6oI5LSdVZuh" yahoo_partid="1.2"><span style="font-size:10.0pt;font-family:Arial, sans-serif;"></span></p><p class="yiv5962825810MsoNormal"> </p></div></div></div>===============================================<br>::The Lexington Computer and Technology Group Mailing List::<br>Reply goes to sender only; Reply All to send to list.<br>Send to the list: <a ymailto="mailto:LCTG@lists.toku.us" href="mailto:LCTG@lists.toku.us">LCTG@lists.toku.us</a> Message archives: <a href="http://lists.toku.us/pipermail/lctg-toku.us/" target="_blank">http://lists.toku.us/pipermail/lctg-toku.us/</a><br>To subscribe: email <a ymailto="mailto:lctg-subscribe@toku.us" href="mailto:lctg-subscribe@toku.us">lctg-subscribe@toku.us</a> To unsubscribe: email <a ymailto="mailto:lctg-unsubscribe@toku.us" href="mailto:lctg-unsubscribe@toku.us">lctg-unsubscribe@toku.us</a><br>Future and Past meeting information: <a href="http://LCTG.toku.us" target="_blank">http://LCTG.toku.us</a><br>List information: <a href="http://lists.toku.us/listinfo.cgi/lctg-toku.us" target="_blank">http://lists.toku.us/listinfo.cgi/lctg-toku.us</a><br>This message was sent to <a ymailto="mailto:bobprimak@yahoo.com." href="mailto:bobprimak@yahoo.com.">bobprimak@yahoo.com.</a><br>Set your list options: <a href="http://lists.toku.us/options.cgi/lctg-toku.us/bobprimak@yahoo.com" target="_blank">http://lists.toku.us/options.cgi/lctg-toku.us/bobprimak@yahoo.com</a><br></div>
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