Experimental determination of the magnetic field spectrum in the Helically Symmetric Experiment using passing particle orbits

The leading terms of the magnetic field spectrum for the Helically Symmetric Experiment [Fusion Technol. 27, 273 (1995)] at low magnetic field are determined by analyzing the orbits of passing particles. The images produced by the intersection of electron orbits with a fluorescent mesh are recorded...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Physics of plasmas 2001-12, Vol.8 (12), p.5165-5170
Hauptverfasser: Talmadge, J. N., Sakaguchi, V., Anderson, F. S. B., Anderson, D. T., Almagri, A. F.
Format: Artikel
Sprache:eng
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
container_end_page 5170
container_issue 12
container_start_page 5165
container_title Physics of plasmas
container_volume 8
creator Talmadge, J. N.
Sakaguchi, V.
Anderson, F. S. B.
Anderson, D. T.
Almagri, A. F.
description The leading terms of the magnetic field spectrum for the Helically Symmetric Experiment [Fusion Technol. 27, 273 (1995)] at low magnetic field are determined by analyzing the orbits of passing particles. The images produced by the intersection of electron orbits with a fluorescent mesh are recorded with a charge coupled device and transformed into magnetic coordinates using a neural network. To obtain the spectral components, the transformed orbits are then fit to an analytic expression that models the drift orbits of the electrons. The results confirm for the first time that quasihelical stellarators have a large effective transform that results in small excursions of particles from a magnetic surface. The drift orbits are also consistent with a very small toroidal curvature component in the spectrum. An external magnetic perturbation, nearly resonant with the transform, is shown to induce a large excursion of the particle orbit off a flux surface.
doi_str_mv 10.1063/1.1415071
format Article
fullrecord <record><control><sourceid>scitation_cross</sourceid><recordid>TN_cdi_crossref_primary_10_1063_1_1415071</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>pop</sourcerecordid><originalsourceid>FETCH-LOGICAL-c363t-5f541edbef387d280b8f69cf3039a54c8d3ab5bce1f95428dd8b32d63ef343f43</originalsourceid><addsrcrecordid>eNp9kMtKAzEUhoMoWKsL3yBbhalJc5nMUopaoeBCBXdDJjmpkbmRpGIXvrvTC3YhuPoPnO98HH6ELimZUCLZDZ1QTgXJ6REaUaKKLJc5P97MOcmk5G-n6CzGD0IIl0KN0PfdVw_BN9AmXWMLCULjW5181-LO4fQOuNHLFpI32HmoLY49mBRWDfbtdj2H2htd12v8vG4aSGEgD1K8ir5d4l7HfYbBVAPuQuVTPEcnTtcRLvY5Rq_3dy-zebZ4enic3S4ywyRLmXCCU7AVOKZyO1WkUk4WxjHCCi24UZbpSlQGqCsEnyprVcWmVrLhgDPH2Rhd7bwmdDEGcGU_vKfDuqSk3PRW0nLf28Be79hofNoW8Qt_duEAlr11_8F_zT-Eh3-8</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype></control><display><type>article</type><title>Experimental determination of the magnetic field spectrum in the Helically Symmetric Experiment using passing particle orbits</title><source>AIP_美国物理联合会期刊回溯(NSTL购买)</source><source>AIP Journals (American Institute of Physics)</source><creator>Talmadge, J. N. ; Sakaguchi, V. ; Anderson, F. S. B. ; Anderson, D. T. ; Almagri, A. F.</creator><creatorcontrib>Talmadge, J. N. ; Sakaguchi, V. ; Anderson, F. S. B. ; Anderson, D. T. ; Almagri, A. F.</creatorcontrib><description>The leading terms of the magnetic field spectrum for the Helically Symmetric Experiment [Fusion Technol. 27, 273 (1995)] at low magnetic field are determined by analyzing the orbits of passing particles. The images produced by the intersection of electron orbits with a fluorescent mesh are recorded with a charge coupled device and transformed into magnetic coordinates using a neural network. To obtain the spectral components, the transformed orbits are then fit to an analytic expression that models the drift orbits of the electrons. The results confirm for the first time that quasihelical stellarators have a large effective transform that results in small excursions of particles from a magnetic surface. The drift orbits are also consistent with a very small toroidal curvature component in the spectrum. An external magnetic perturbation, nearly resonant with the transform, is shown to induce a large excursion of the particle orbit off a flux surface.</description><identifier>ISSN: 1070-664X</identifier><identifier>EISSN: 1089-7674</identifier><identifier>DOI: 10.1063/1.1415071</identifier><identifier>CODEN: PHPAEN</identifier><language>eng</language><ispartof>Physics of plasmas, 2001-12, Vol.8 (12), p.5165-5170</ispartof><rights>American Institute of Physics</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c363t-5f541edbef387d280b8f69cf3039a54c8d3ab5bce1f95428dd8b32d63ef343f43</citedby><cites>FETCH-LOGICAL-c363t-5f541edbef387d280b8f69cf3039a54c8d3ab5bce1f95428dd8b32d63ef343f43</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://pubs.aip.org/pop/article-lookup/doi/10.1063/1.1415071$$EHTML$$P50$$Gscitation$$H</linktohtml><link.rule.ids>314,776,780,790,1553,4498,27901,27902,76353,76359</link.rule.ids></links><search><creatorcontrib>Talmadge, J. N.</creatorcontrib><creatorcontrib>Sakaguchi, V.</creatorcontrib><creatorcontrib>Anderson, F. S. B.</creatorcontrib><creatorcontrib>Anderson, D. T.</creatorcontrib><creatorcontrib>Almagri, A. F.</creatorcontrib><title>Experimental determination of the magnetic field spectrum in the Helically Symmetric Experiment using passing particle orbits</title><title>Physics of plasmas</title><description>The leading terms of the magnetic field spectrum for the Helically Symmetric Experiment [Fusion Technol. 27, 273 (1995)] at low magnetic field are determined by analyzing the orbits of passing particles. The images produced by the intersection of electron orbits with a fluorescent mesh are recorded with a charge coupled device and transformed into magnetic coordinates using a neural network. To obtain the spectral components, the transformed orbits are then fit to an analytic expression that models the drift orbits of the electrons. The results confirm for the first time that quasihelical stellarators have a large effective transform that results in small excursions of particles from a magnetic surface. The drift orbits are also consistent with a very small toroidal curvature component in the spectrum. An external magnetic perturbation, nearly resonant with the transform, is shown to induce a large excursion of the particle orbit off a flux surface.</description><issn>1070-664X</issn><issn>1089-7674</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2001</creationdate><recordtype>article</recordtype><recordid>eNp9kMtKAzEUhoMoWKsL3yBbhalJc5nMUopaoeBCBXdDJjmpkbmRpGIXvrvTC3YhuPoPnO98HH6ELimZUCLZDZ1QTgXJ6REaUaKKLJc5P97MOcmk5G-n6CzGD0IIl0KN0PfdVw_BN9AmXWMLCULjW5181-LO4fQOuNHLFpI32HmoLY49mBRWDfbtdj2H2htd12v8vG4aSGEgD1K8ir5d4l7HfYbBVAPuQuVTPEcnTtcRLvY5Rq_3dy-zebZ4enic3S4ywyRLmXCCU7AVOKZyO1WkUk4WxjHCCi24UZbpSlQGqCsEnyprVcWmVrLhgDPH2Rhd7bwmdDEGcGU_vKfDuqSk3PRW0nLf28Be79hofNoW8Qt_duEAlr11_8F_zT-Eh3-8</recordid><startdate>20011201</startdate><enddate>20011201</enddate><creator>Talmadge, J. N.</creator><creator>Sakaguchi, V.</creator><creator>Anderson, F. S. B.</creator><creator>Anderson, D. T.</creator><creator>Almagri, A. F.</creator><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>20011201</creationdate><title>Experimental determination of the magnetic field spectrum in the Helically Symmetric Experiment using passing particle orbits</title><author>Talmadge, J. N. ; Sakaguchi, V. ; Anderson, F. S. B. ; Anderson, D. T. ; Almagri, A. F.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c363t-5f541edbef387d280b8f69cf3039a54c8d3ab5bce1f95428dd8b32d63ef343f43</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2001</creationdate><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Talmadge, J. N.</creatorcontrib><creatorcontrib>Sakaguchi, V.</creatorcontrib><creatorcontrib>Anderson, F. S. B.</creatorcontrib><creatorcontrib>Anderson, D. T.</creatorcontrib><creatorcontrib>Almagri, A. F.</creatorcontrib><collection>CrossRef</collection><jtitle>Physics of plasmas</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Talmadge, J. N.</au><au>Sakaguchi, V.</au><au>Anderson, F. S. B.</au><au>Anderson, D. T.</au><au>Almagri, A. F.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Experimental determination of the magnetic field spectrum in the Helically Symmetric Experiment using passing particle orbits</atitle><jtitle>Physics of plasmas</jtitle><date>2001-12-01</date><risdate>2001</risdate><volume>8</volume><issue>12</issue><spage>5165</spage><epage>5170</epage><pages>5165-5170</pages><issn>1070-664X</issn><eissn>1089-7674</eissn><coden>PHPAEN</coden><abstract>The leading terms of the magnetic field spectrum for the Helically Symmetric Experiment [Fusion Technol. 27, 273 (1995)] at low magnetic field are determined by analyzing the orbits of passing particles. The images produced by the intersection of electron orbits with a fluorescent mesh are recorded with a charge coupled device and transformed into magnetic coordinates using a neural network. To obtain the spectral components, the transformed orbits are then fit to an analytic expression that models the drift orbits of the electrons. The results confirm for the first time that quasihelical stellarators have a large effective transform that results in small excursions of particles from a magnetic surface. The drift orbits are also consistent with a very small toroidal curvature component in the spectrum. An external magnetic perturbation, nearly resonant with the transform, is shown to induce a large excursion of the particle orbit off a flux surface.</abstract><doi>10.1063/1.1415071</doi><tpages>6</tpages></addata></record>
fulltext fulltext
identifier ISSN: 1070-664X
ispartof Physics of plasmas, 2001-12, Vol.8 (12), p.5165-5170
issn 1070-664X
1089-7674
language eng
recordid cdi_crossref_primary_10_1063_1_1415071
source AIP_美国物理联合会期刊回溯(NSTL购买); AIP Journals (American Institute of Physics)
title Experimental determination of the magnetic field spectrum in the Helically Symmetric Experiment using passing particle orbits
url https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-02-18T15%3A31%3A24IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-scitation_cross&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Experimental%20determination%20of%20the%20magnetic%20field%20spectrum%20in%20the%20Helically%20Symmetric%20Experiment%20using%20passing%20particle%20orbits&rft.jtitle=Physics%20of%20plasmas&rft.au=Talmadge,%20J.%20N.&rft.date=2001-12-01&rft.volume=8&rft.issue=12&rft.spage=5165&rft.epage=5170&rft.pages=5165-5170&rft.issn=1070-664X&rft.eissn=1089-7674&rft.coden=PHPAEN&rft_id=info:doi/10.1063/1.1415071&rft_dat=%3Cscitation_cross%3Epop%3C/scitation_cross%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_id=info:pmid/&rfr_iscdi=true