{"id":678,"date":"2020-03-09T02:15:54","date_gmt":"2020-03-09T02:15:17","guid":{"rendered":"http:\/\/www.nuclearphysicslab.com\/npl\/?page_id=678"},"modified":"2020-03-18T14:47:07","modified_gmt":"2020-03-18T18:47:07","slug":"linear-pinch","status":"publish","type":"page","link":"http:\/\/www.nuclearphysicslab.com\/npl\/npl-home\/plasma\/pinch-machines\/linear-pinch\/","title":{"rendered":"Linear Pinch"},"content":{"rendered":"\n

Author: Jay & Tim<\/em><\/p>\n\n\n\n

This was the first linear pinch experiment we have setup. It uses RF pre-ionization to make the plasma conductive. Then, via an externally triggered spark gap, a 30kV, 3.5uF cap bank is placed across the two hefty axial copper leads.<\/p>\n\n\n\n

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The initial linear pinch chamber is a glass break with 6-inch conflat flanges on each end. The left side is held at ground potential and the right side is pulsed HV.<\/figcaption><\/figure>\n\n\n\n
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The coil surrounding the glass tube and the vacuum variable capacitor in the background form a high-Q tank circuit to pre-ionize the plasma. The leads coming in from the top of the image connect the RF generator to the 50-ohm points of the tank circuit.<\/figcaption><\/figure>\n\n\n\n
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Using my old Jenning’s vacuum tube RF voltmeter I was able to find resonance and measure the peak voltage.<\/figcaption><\/figure>\n\n\n\n
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RF pre-ionization of air.<\/figcaption><\/figure>\n\n\n\n
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RF pre-ionization of Krypton.<\/figcaption><\/figure>\n\n\n\n
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Dumping 30kV, 3.5uF across tube (via a triggered spark gap), the pinch is formed!<\/figcaption><\/figure>\n\n\n\n
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Shortly thereafter there is the onset of instability. <\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"

Author: Jay & Tim This was the first linear pinch experiment we have setup. It uses RF pre-ionization to make the plasma conductive. Then, via an externally triggered spark gap, a 30kV, 3.5uF cap bank is placed across the two hefty axial copper leads.<\/p>\n","protected":false},"author":3,"featured_media":694,"parent":153,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"advanced-sidebar-menu\/link-title":"","advanced-sidebar-menu\/exclude-page":false},"categories":[15,39,37],"tags":[],"_links":{"self":[{"href":"http:\/\/www.nuclearphysicslab.com\/npl\/wp-json\/wp\/v2\/pages\/678"}],"collection":[{"href":"http:\/\/www.nuclearphysicslab.com\/npl\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/www.nuclearphysicslab.com\/npl\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/www.nuclearphysicslab.com\/npl\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"http:\/\/www.nuclearphysicslab.com\/npl\/wp-json\/wp\/v2\/comments?post=678"}],"version-history":[{"count":5,"href":"http:\/\/www.nuclearphysicslab.com\/npl\/wp-json\/wp\/v2\/pages\/678\/revisions"}],"predecessor-version":[{"id":2150,"href":"http:\/\/www.nuclearphysicslab.com\/npl\/wp-json\/wp\/v2\/pages\/678\/revisions\/2150"}],"up":[{"embeddable":true,"href":"http:\/\/www.nuclearphysicslab.com\/npl\/wp-json\/wp\/v2\/pages\/153"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.nuclearphysicslab.com\/npl\/wp-json\/wp\/v2\/media\/694"}],"wp:attachment":[{"href":"http:\/\/www.nuclearphysicslab.com\/npl\/wp-json\/wp\/v2\/media?parent=678"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.nuclearphysicslab.com\/npl\/wp-json\/wp\/v2\/categories?post=678"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.nuclearphysicslab.com\/npl\/wp-json\/wp\/v2\/tags?post=678"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}