The quasi-continuous exhaust regime in ASDEX Upgrade and JET

IF 2.3 2区物理与天体物理 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Nuclear Materials and Energy Pub Date : 2025-03-01 DOI:10.1016/j.nme.2025.101904

M. Faitsch , M. Dunne , E. Lerche , P. Lomas , I. Balboa , P. Bilkova , P. Bohm , L. Gil , G.F. Harrer , A. Kappatou , D. Kos , B. Labit , L. Radovanovic , A. Redl , O. Sauter , S. Silburn , E.R. Solano , A. Tookey , E. Viezzer , E. Wolfrum , U. Stroth

{"title":"The quasi-continuous exhaust regime in ASDEX Upgrade and JET","authors":"M. Faitsch , M. Dunne , E. Lerche , P. Lomas , I. Balboa , P. Bilkova , P. Bohm , L. Gil , G.F. Harrer , A. Kappatou , D. Kos , B. Labit , L. Radovanovic , A. Redl , O. Sauter , S. Silburn , E.R. Solano , A. Tookey , E. Viezzer , E. Wolfrum , U. Stroth","doi":"10.1016/j.nme.2025.101904","DOIUrl":null,"url":null,"abstract":"<div><div>The quasi-continuous exhaust (QCE) regime is a type-I ELM-free high confinement regime obtained at high plasma shaping and high separatrix density. A comparison with various ELM-free regimes in the literature is presented together with potential physics models for accessing the QCE regime. The regime was recently successfully ported from ASDEX Upgrade to JET. We present a first comparison between the achieved plasma conditions in the two tokamaks and an extrapolation towards ITER and EU-DEMO parameters. The step in size from ASDEX Upgrade to JET successfully lowered the pedestal top collisionality, demonstrating that the regime is not limited to high collisionality at the pedestal top but naturally operates at high density. The extrapolation to ITER and EU-DEMO parameters shows that they can reach the conditions in which ASDEX Upgrade and JET are operating in QCE without type-I ELMs applying previously proposed physics models.</div></div>","PeriodicalId":56004,"journal":{"name":"Nuclear Materials and Energy","volume":"42 ","pages":"Article 101904"},"PeriodicalIF":2.3000,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nuclear Materials and Energy","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2352179125000444","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"NUCLEAR SCIENCE & TECHNOLOGY","Score":null,"Total":0}

引用次数: 0

Abstract

The quasi-continuous exhaust (QCE) regime is a type-I ELM-free high confinement regime obtained at high plasma shaping and high separatrix density. A comparison with various ELM-free regimes in the literature is presented together with potential physics models for accessing the QCE regime. The regime was recently successfully ported from ASDEX Upgrade to JET. We present a first comparison between the achieved plasma conditions in the two tokamaks and an extrapolation towards ITER and EU-DEMO parameters. The step in size from ASDEX Upgrade to JET successfully lowered the pedestal top collisionality, demonstrating that the regime is not limited to high collisionality at the pedestal top but naturally operates at high density. The extrapolation to ITER and EU-DEMO parameters shows that they can reach the conditions in which ASDEX Upgrade and JET are operating in QCE without type-I ELMs applying previously proposed physics models.

查看原文本刊更多论文

ASDEX Upgrade和JET的准连续排气机制

准连续排气（QCE）体制是在高等离子体成形和高分离矩阵密度条件下获得的i型无elm高约束体制。与文献中各种无elm状态进行了比较，并提出了进入QCE状态的潜在物理模型。该机制最近成功地从ASDEX Upgrade移植到JET。我们首次比较了两个托卡马克中实现的等离子体条件，并对ITER和EU-DEMO参数进行了外推。从ASDEX升级到JET的尺寸步骤成功地降低了基座顶部的碰撞，表明该制度并不局限于基座顶部的高碰撞，而是自然地在高密度下运行。对ITER和EU-DEMO参数的外推表明，它们可以达到ASDEX Upgrade和JET在QCE中运行的条件，而不需要使用先前提出的物理模型的i型elm。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Nuclear Materials and Energy Materials Science-Materials Science (miscellaneous)

CiteScore

3.70

自引率

15.40%

发文量

175

审稿时长

20 weeks

期刊介绍： The open-access journal Nuclear Materials and Energy is devoted to the growing field of research for material application in the production of nuclear energy. Nuclear Materials and Energy publishes original research articles of up to 6 pages in length.