Time-resolved and multiple-angle Thomson scattering on gas-puff Z-Pinch plasmas at pinch time
A 526.5 nm Thomson scattering diagnostic laser enables probing of the plasma conditions of neon gas-puff z-pinch implosions with temporal resolution. Splitting the laser into two 2.5 J pulses, both 2.3 ns in duration and separated by 4 ns, allows observation of sub-nanosecond time-resolved spectra f...
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description | A 526.5 nm Thomson scattering diagnostic laser enables probing of the plasma conditions of neon gas-puff z-pinch implosions with temporal resolution. Splitting the laser into two 2.5 J pulses, both 2.3 ns in duration and separated by 4 ns, allows observation of sub-nanosecond time-resolved spectra for a total time of 7 ns. Collection optics were set at 90° and 30° to the laser, observing the same on-axis scattering volume with a radial extent of 0.4 mm. The spectra from both angles were collected by using the same streak camera, using a coupling system that allowed us to obtain temporal, spectral, and angular resolution in the same image. By comparing the ion-acoustic spectra from the two angles, we determined electron temperature and a range of possible electron densities. Measurements made in the 1-3 ns period before pinch time show best fit (determined by a least-squares method) electron densities of around 2 × 1019 cm−3, increasing to 1.5 × 1020 cm−3 in the 3 ns following the start of the x-ray burst (t = 0 ns) from the pinch. The electron temperature increases from 300 eV to 500 eV at t = 0 ns before decreasing to below 300 eV after pinch time. With the present parameters (probe beam, collection angles, and electron temperature and density), this diagnostic method is too insensitive to electron density to provide more than a constraint on that parameter. Plasma regimes in which this technique could determine electron density with some precision are calculated. |
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R. ; Banasek, Jacob T. ; Potter, William M. ; Hammer, David A.</creator><creatorcontrib>Rocco, Sophia V. R. ; Banasek, Jacob T. ; Potter, William M. ; Hammer, David A.</creatorcontrib><description>A 526.5 nm Thomson scattering diagnostic laser enables probing of the plasma conditions of neon gas-puff z-pinch implosions with temporal resolution. Splitting the laser into two 2.5 J pulses, both 2.3 ns in duration and separated by 4 ns, allows observation of sub-nanosecond time-resolved spectra for a total time of 7 ns. Collection optics were set at 90° and 30° to the laser, observing the same on-axis scattering volume with a radial extent of 0.4 mm. The spectra from both angles were collected by using the same streak camera, using a coupling system that allowed us to obtain temporal, spectral, and angular resolution in the same image. By comparing the ion-acoustic spectra from the two angles, we determined electron temperature and a range of possible electron densities. Measurements made in the 1-3 ns period before pinch time show best fit (determined by a least-squares method) electron densities of around 2 × 1019 cm−3, increasing to 1.5 × 1020 cm−3 in the 3 ns following the start of the x-ray burst (t = 0 ns) from the pinch. The electron temperature increases from 300 eV to 500 eV at t = 0 ns before decreasing to below 300 eV after pinch time. With the present parameters (probe beam, collection angles, and electron temperature and density), this diagnostic method is too insensitive to electron density to provide more than a constraint on that parameter. Plasma regimes in which this technique could determine electron density with some precision are calculated.</description><identifier>ISSN: 0034-6748</identifier><identifier>EISSN: 1089-7623</identifier><identifier>DOI: 10.1063/1.5038879</identifier><identifier>PMID: 30399969</identifier><identifier>CODEN: RSINAK</identifier><language>eng</language><publisher>United States: American Institute of Physics</publisher><subject>Angular resolution ; Collection ; Diagnostic systems ; Electron density ; Electron energy ; Electrons ; Gas puff Z pinch plasmas ; Implosions ; Lasers ; Least squares method ; Neon ; Parameters ; Plasma ; Scientific apparatus & instruments ; Spectra ; Streak cameras ; Temporal resolution ; Thomson scattering</subject><ispartof>Review of scientific instruments, 2018-10, Vol.89 (10), p.10C117-10C117</ispartof><rights>Author(s)</rights><rights>2018 Author(s). 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R.</creatorcontrib><creatorcontrib>Banasek, Jacob T.</creatorcontrib><creatorcontrib>Potter, William M.</creatorcontrib><creatorcontrib>Hammer, David A.</creatorcontrib><title>Time-resolved and multiple-angle Thomson scattering on gas-puff Z-Pinch plasmas at pinch time</title><title>Review of scientific instruments</title><addtitle>Rev Sci Instrum</addtitle><description>A 526.5 nm Thomson scattering diagnostic laser enables probing of the plasma conditions of neon gas-puff z-pinch implosions with temporal resolution. Splitting the laser into two 2.5 J pulses, both 2.3 ns in duration and separated by 4 ns, allows observation of sub-nanosecond time-resolved spectra for a total time of 7 ns. Collection optics were set at 90° and 30° to the laser, observing the same on-axis scattering volume with a radial extent of 0.4 mm. The spectra from both angles were collected by using the same streak camera, using a coupling system that allowed us to obtain temporal, spectral, and angular resolution in the same image. By comparing the ion-acoustic spectra from the two angles, we determined electron temperature and a range of possible electron densities. Measurements made in the 1-3 ns period before pinch time show best fit (determined by a least-squares method) electron densities of around 2 × 1019 cm−3, increasing to 1.5 × 1020 cm−3 in the 3 ns following the start of the x-ray burst (t = 0 ns) from the pinch. The electron temperature increases from 300 eV to 500 eV at t = 0 ns before decreasing to below 300 eV after pinch time. With the present parameters (probe beam, collection angles, and electron temperature and density), this diagnostic method is too insensitive to electron density to provide more than a constraint on that parameter. Plasma regimes in which this technique could determine electron density with some precision are calculated.</description><subject>Angular resolution</subject><subject>Collection</subject><subject>Diagnostic systems</subject><subject>Electron density</subject><subject>Electron energy</subject><subject>Electrons</subject><subject>Gas puff Z pinch plasmas</subject><subject>Implosions</subject><subject>Lasers</subject><subject>Least squares method</subject><subject>Neon</subject><subject>Parameters</subject><subject>Plasma</subject><subject>Scientific apparatus & instruments</subject><subject>Spectra</subject><subject>Streak cameras</subject><subject>Temporal resolution</subject><subject>Thomson scattering</subject><issn>0034-6748</issn><issn>1089-7623</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><recordid>eNp90cuKFDEUBuAgitOOLnwBCbpRocbcKnWylMEbDOii3QgS0qlT3RmqkrKSGvDtzditgqDZHBI-fk74CXnM2QVnWr7iFy2TAJ25QzacgWk6LeRdsmFMqkZ3Cs7Ig5yvWT0t5_fJmWTSGKPNhnzdhgmbBXMab7CnLvZ0WscS5hEbF_cj0u0hTTlFmr0rBZcQ97Te9i438zoM9EvzKUR_oPPo8uQydYXOPx9KDX5I7g1uzPjoNM_J57dvtpfvm6uP7z5cvr5qvOKsNAp6jU7DDrWrA0Gp3gmpFXjQu1bVZXGHrQfZe9OiaxkKpcD0IICB7uQ5eXrMTbkEm30o6A8-xYi-WK46EJ2p6PkRzUv6tmIudgrZ4zi6iGnNVnDJgDEQbaXP_qLXaV1i_UJVQgC0gqmqXhyVX1LOCw52XsLklu-WM3tbjOX2VEy1T06J627C_rf81UQFL4_gdntXQor_TfsnvknLH2jnfpA_AIRpolA</recordid><startdate>201810</startdate><enddate>201810</enddate><creator>Rocco, Sophia V. R.</creator><creator>Banasek, Jacob T.</creator><creator>Potter, William M.</creator><creator>Hammer, David A.</creator><general>American Institute of Physics</general><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>7X8</scope><scope>OTOTI</scope><orcidid>https://orcid.org/0000-0002-3149-1178</orcidid><orcidid>https://orcid.org/0000-0001-8259-2203</orcidid><orcidid>https://orcid.org/0000-0002-6618-0580</orcidid><orcidid>https://orcid.org/0000000231491178</orcidid><orcidid>https://orcid.org/0000000182592203</orcidid><orcidid>https://orcid.org/0000000266180580</orcidid></search><sort><creationdate>201810</creationdate><title>Time-resolved and multiple-angle Thomson scattering on gas-puff Z-Pinch plasmas at pinch time</title><author>Rocco, Sophia V. R. ; Banasek, Jacob T. ; Potter, William M. ; Hammer, David A.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c410t-48d6ea68be6aa68e844da23648c86b54399ebe5c83dc95ea50e24489d82808673</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Angular resolution</topic><topic>Collection</topic><topic>Diagnostic systems</topic><topic>Electron density</topic><topic>Electron energy</topic><topic>Electrons</topic><topic>Gas puff Z pinch plasmas</topic><topic>Implosions</topic><topic>Lasers</topic><topic>Least squares method</topic><topic>Neon</topic><topic>Parameters</topic><topic>Plasma</topic><topic>Scientific apparatus & instruments</topic><topic>Spectra</topic><topic>Streak cameras</topic><topic>Temporal resolution</topic><topic>Thomson scattering</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Rocco, Sophia V. R.</creatorcontrib><creatorcontrib>Banasek, Jacob T.</creatorcontrib><creatorcontrib>Potter, William M.</creatorcontrib><creatorcontrib>Hammer, David A.</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>MEDLINE - Academic</collection><collection>OSTI.GOV</collection><jtitle>Review of scientific instruments</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Rocco, Sophia V. R.</au><au>Banasek, Jacob T.</au><au>Potter, William M.</au><au>Hammer, David A.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Time-resolved and multiple-angle Thomson scattering on gas-puff Z-Pinch plasmas at pinch time</atitle><jtitle>Review of scientific instruments</jtitle><addtitle>Rev Sci Instrum</addtitle><date>2018-10</date><risdate>2018</risdate><volume>89</volume><issue>10</issue><spage>10C117</spage><epage>10C117</epage><pages>10C117-10C117</pages><issn>0034-6748</issn><eissn>1089-7623</eissn><coden>RSINAK</coden><abstract>A 526.5 nm Thomson scattering diagnostic laser enables probing of the plasma conditions of neon gas-puff z-pinch implosions with temporal resolution. Splitting the laser into two 2.5 J pulses, both 2.3 ns in duration and separated by 4 ns, allows observation of sub-nanosecond time-resolved spectra for a total time of 7 ns. Collection optics were set at 90° and 30° to the laser, observing the same on-axis scattering volume with a radial extent of 0.4 mm. The spectra from both angles were collected by using the same streak camera, using a coupling system that allowed us to obtain temporal, spectral, and angular resolution in the same image. By comparing the ion-acoustic spectra from the two angles, we determined electron temperature and a range of possible electron densities. Measurements made in the 1-3 ns period before pinch time show best fit (determined by a least-squares method) electron densities of around 2 × 1019 cm−3, increasing to 1.5 × 1020 cm−3 in the 3 ns following the start of the x-ray burst (t = 0 ns) from the pinch. The electron temperature increases from 300 eV to 500 eV at t = 0 ns before decreasing to below 300 eV after pinch time. With the present parameters (probe beam, collection angles, and electron temperature and density), this diagnostic method is too insensitive to electron density to provide more than a constraint on that parameter. Plasma regimes in which this technique could determine electron density with some precision are calculated.</abstract><cop>United States</cop><pub>American Institute of Physics</pub><pmid>30399969</pmid><doi>10.1063/1.5038879</doi><tpages>5</tpages><orcidid>https://orcid.org/0000-0002-3149-1178</orcidid><orcidid>https://orcid.org/0000-0001-8259-2203</orcidid><orcidid>https://orcid.org/0000-0002-6618-0580</orcidid><orcidid>https://orcid.org/0000000231491178</orcidid><orcidid>https://orcid.org/0000000182592203</orcidid><orcidid>https://orcid.org/0000000266180580</orcidid></addata></record> |
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subjects | Angular resolution Collection Diagnostic systems Electron density Electron energy Electrons Gas puff Z pinch plasmas Implosions Lasers Least squares method Neon Parameters Plasma Scientific apparatus & instruments Spectra Streak cameras Temporal resolution Thomson scattering |
title | Time-resolved and multiple-angle Thomson scattering on gas-puff Z-Pinch plasmas at pinch time |
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