[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-153992-105":59,"doc-detail-153992-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","ignitor-physics-assessment-and-confinement-projections-independent-assessment","IGNITOR Physics Assessment and Confinement Projections - Independent Assessment","","An independent assessment of the physics of Ignitor presents it as a physics demonstration experiment targeting thermonuclear ignition, where fusion alpha heating compensates for anomalous transport and radiation losses. Simulations indicate production of alpha-particle power up to 10–20 MW sustained for several seconds. Key requirements include peaked density profiles over several energy-confinement timescales, control of current penetration to optimize ohmic heating and avoid sawtooth instabilities. A 10–20 MW ion cyclotron radio-frequency system and a high-speed pellet injector are treated as essential for operational flexibility against adverse plasma behavior.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":40,"@type":76,"position":81},"https://docshare.wps.com/document/research-report/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/ignitor-physics-assessment-and-confinement-projections-independent-assessment/153992/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/ignitor-physics-assessment-and-confinement-projections-independent-assessment/153992.png","ImageObject",300,407,{"name":92,"@type":93},"Ethan Miller","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-09-21","2026-08-28",true,{"@type":102,"interactionType":103,"userInteractionCount":24},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What is the main goal of the Ignitor/IGNITOR experiment?","Question",{"text":112,"@type":113},"To achieve thermonuclear ignition, defined as the regime where fusion alpha heating compensates for thermal energy losses from anomalous transport and radiation.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"What do simulations predict about alpha-particle power in IGNITOR?",{"text":117,"@type":113},"They show alpha-particle power up to about 10–20 MW for a period of a few seconds.",{"name":119,"@type":110,"acceptedAnswer":120},"Which operational systems are considered essential to improve flexibility and mitigate adverse plasma behavior?",{"text":121,"@type":113},"A 10–20 MW ion cyclotron radio-frequency system and a high-speed pellet injector are considered essential for added flexibility.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},153992,1787884708,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":24,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":139,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":129,"read_time":144},687207017582,"https://ap-avatar.wpscdn.com/davatar_994ba38a5ba835b3df7d355c54d3ed8d","IGNITOR Physics Assessment and Confinement Projections  \nW. HORTON 1 , F. PORCELLI2 ,3 , P. ZHU 1 , A. AYDEMIR 1 , Y. KISHIMOTO4 , T. TAJIMA 1  \n1 Institute for Fusion Studies, The University of Texas, Austin, TX, 78712  \n2 INFM and Dipartimento di Energetica, Politecnico di Torino, 10129 Torino, Italy  \nPlasma Science and Fusion Center, MIT, Cambridge, MA USA  \n4 JAERI, Plasma Theory, Tokai-Mura, Naka-Gun, Ibaraki-Ken 319-11, JAPAN  \nAbstract  \nAn independent assessment of the physics of Ignitor is presented. Ignitor is a physics demonstration experiment, with the main goal of achieving thermonuclear ignition, defined asthe regime where fusion alpha heating compensates for all forms of energy losses. Simulations show that a pulse of α particle power up to 10-20 MW is produced for a period over a few seconds. Crucial issues are the production of peaked density profiles on a time-scale of several energy confinement times, the control of current penetration for the optimization of ohmic heating and sawtooth avoidance. The presence of a 10-20 MW Ion Cyclotron Radio frequency system and the operation of a high-speed pellet injector are considered essential to provide added flexibility in order to counter unexpected, adverse plasma behavior.  \n1 Introduction  \nIGNITOR [1, 2] is a physics demonstration experiment. Its main goal is to achieve thermonuclear ignition, defined as the regime where the fusion alpha heating compensates for the thermal energy losses due to anomalous transport and radiation. The purpose of this work is to provide an independent assessment of the capabilities of the IGNITOR tokamak machine. The relevant information that would be gained from such an experiment can be summarized as follows:  \n(i) Improved understanding of plasma turbulence and transport processes, by the exploration of high-plasma-density, high-magnetic-field regimes never accessed before. More specifically, IGNITOR would provide insight into the ohmic confinement scaling laws and self-organized plasma  \nprofiles at high temperatures. Furthermore, it would provide relevant information on the conditions required for the spontaneous generation of plasma rotation through anomalous angular momentum transport. Plasma rotation is believed to play an important role in determining the level of turbulent fluctuations.  \n(ii) Alpha particle physics issues, in particular: alpha particle confinement, collective electromagnetic modes excited by the fusion alphas, and the nature of alpha particle heating. We note that an outstanding alpha physics issue is whether collective instabilities excited by the fusion alpha particles, such as fishbones and Toroidal Alfve´n Eigenmodes (TAE), can seriously degrade the quality of confinement. A second outstanding physics issue is whether alpha particle heating causes the same degree of confinement degradation as other forms of auxiliary plasma heating.  \n(iii) The control of a fusion burning plasma over physically significant time scales. With a current flat top of a few seconds, IGNITOR should have a long enough pulse-length to thoroughly examine alpha particle physics and thermal transients associated with the DT burn.  \n(iv) The IGNITOR experiment would give first indications about a possible development path to tritium-poor, reduced neutron production of fusion power.  \nIgnition in IGNITOR would be reached under non-steady-state conditions as in fact ignition is intrinsically a time evolving event. The ignited regime would last a few confinement times (2−5τE , τE ∼ 0.5s) and many alpha particle slowing down times (50−100τsd), which is adequate from the physics point of view.  \nThe concept of ignition is defined [3] as the plasma state where the heating power due to the fusion alpha particles compensates for all forms of power losses (due to anomalous transport and radiation) . It is worthwhile to discuss this concept quantitatively, especially in view of non-steady-state operation. Consider the power balance equation,  \ndWdt = Pohm + P","cbCaik7qavVw7DWI","https://ap.wps.com/l/cbCaik7qavVw7DWI","pdf",498473,39,"English","# Abstract\n# Introduction\n## Mission and ignition definition\n## Physics issues addressed\n## Power balance and Q* parameter\n## Simulation parameters and ITER-relevant implications","[{\"question\":\"What is the main goal of the Ignitor/IGNITOR experiment?\",\"answer\":\"To achieve thermonuclear ignition, defined as the regime where fusion alpha heating compensates for thermal energy losses from anomalous transport and radiation.\"},{\"question\":\"What do simulations predict about alpha-particle power in IGNITOR?\",\"answer\":\"They show alpha-particle power up to about 10–20 MW for a period of a few seconds.\"},{\"question\":\"Which operational systems are considered essential to improve flexibility and mitigate adverse plasma behavior?\",\"answer\":\"A 10–20 MW ion cyclotron radio-frequency system and a high-speed pellet injector are considered essential for added flexibility.\"}]","IGNITOR Physics Assessment and Confinement Projections - Independent Assessment | PDF",98]