Design and development of the ITER CTS diagnostic

Søren Bang Korsholm*, Bruno Gonçalves, Heidi E. Gutierrez, Elsa Henriques, Virginia Infante, Thomas Jensen, Martin Jessen, Esben Bryndt Klinkby, Axel Wright Larsen, Frank Leipold, André Lopes, Raul Luis, Volker Naulin, Stefan K. Nielsen, Erik Nonbøl, Jesper Rasmussen, Mirko Salewski, Morten Stejner, Arianna Taormina, Alberto Vale & 4 others Catarina Vidal, Laura Sanchez, Raul M. Ballester, Victor Udintsev

*Corresponding author for this work

Research output: Contribution to journalConference articleResearchpeer-review

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Abstract

The Collective Thomson Scattering (CTS) diagnostic will be a primary diagnostic for measuring the dynamics of the confined fusion born alpha particles in ITER and will be the only diagnostic for alphas below 1.7 MeV [1]. The probe beam of the CTS diagnostic comes from a 60 GHz 1 MW gyrotron operated in a ~100 Hz modulation sequence. In the plasma, the probing beam will be scattered off fluctuations primarily due to the dynamics of the ions. Seven fixed receiver mirrors will pick up scattered radiation (the CTS signal) from seven measurement volumes along the probe beam covering the cross section of the plasma. The diagnostic is planned to provide a temporal resolution of ~100 ms and a spatial resolution of ~a/4 in the core and ~a/20 near the plasma edge where a = 2.0 m is the nominal minor radius of ITER. The front-end quasi-optics will be installed in an equatorial port plug (EPP#12). A particular challenge will be to pass the probing beam through the fundamental electron cyclotron resonance, which is located in the port plug (R=10.3 m) for the nominal magnetic field Bt = 5.3 T. Hence, particular mitigation actions against arcing have to be applied. The status of the design and specific challenges will be discussed.
Original languageEnglish
Article number03002
JournalEPJ Web of Conferences
Volume203
Number of pages6
ISSN2100-014X
DOIs
Publication statusPublished - 2019
Event20th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating - Greifswald, Germany
Duration: 14 May 201818 May 2018

Workshop

Workshop20th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating
CountryGermany
CityGreifswald
Period14/05/201818/05/2018

Cite this

Korsholm, Søren Bang ; Gonçalves, Bruno ; Gutierrez, Heidi E. ; Henriques, Elsa ; Infante, Virginia ; Jensen, Thomas ; Jessen, Martin ; Klinkby, Esben Bryndt ; Larsen, Axel Wright ; Leipold, Frank ; Lopes, André ; Luis, Raul ; Naulin, Volker ; Nielsen, Stefan K. ; Nonbøl, Erik ; Rasmussen, Jesper ; Salewski, Mirko ; Stejner, Morten ; Taormina, Arianna ; Vale, Alberto ; Vidal, Catarina ; Sanchez, Laura ; Ballester, Raul M. ; Udintsev, Victor. / Design and development of the ITER CTS diagnostic. In: EPJ Web of Conferences. 2019 ; Vol. 203.
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title = "Design and development of the ITER CTS diagnostic",
abstract = "The Collective Thomson Scattering (CTS) diagnostic will be a primary diagnostic for measuring the dynamics of the confined fusion born alpha particles in ITER and will be the only diagnostic for alphas below 1.7 MeV [1]. The probe beam of the CTS diagnostic comes from a 60 GHz 1 MW gyrotron operated in a ~100 Hz modulation sequence. In the plasma, the probing beam will be scattered off fluctuations primarily due to the dynamics of the ions. Seven fixed receiver mirrors will pick up scattered radiation (the CTS signal) from seven measurement volumes along the probe beam covering the cross section of the plasma. The diagnostic is planned to provide a temporal resolution of ~100 ms and a spatial resolution of ~a/4 in the core and ~a/20 near the plasma edge where a = 2.0 m is the nominal minor radius of ITER. The front-end quasi-optics will be installed in an equatorial port plug (EPP#12). A particular challenge will be to pass the probing beam through the fundamental electron cyclotron resonance, which is located in the port plug (R=10.3 m) for the nominal magnetic field Bt = 5.3 T. Hence, particular mitigation actions against arcing have to be applied. The status of the design and specific challenges will be discussed.",
author = "Korsholm, {S{\o}ren Bang} and Bruno Gon{\cc}alves and Gutierrez, {Heidi E.} and Elsa Henriques and Virginia Infante and Thomas Jensen and Martin Jessen and Klinkby, {Esben Bryndt} and Larsen, {Axel Wright} and Frank Leipold and Andr{\'e} Lopes and Raul Luis and Volker Naulin and Nielsen, {Stefan K.} and Erik Nonb{\o}l and Jesper Rasmussen and Mirko Salewski and Morten Stejner and Arianna Taormina and Alberto Vale and Catarina Vidal and Laura Sanchez and Ballester, {Raul M.} and Victor Udintsev",
year = "2019",
doi = "10.1051/epjconf/201920303002",
language = "English",
volume = "203",
journal = "E P J Web of Conferences",
issn = "2100-014X",
publisher = "E D P Sciences",

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Design and development of the ITER CTS diagnostic. / Korsholm, Søren Bang; Gonçalves, Bruno; Gutierrez, Heidi E.; Henriques, Elsa; Infante, Virginia; Jensen, Thomas; Jessen, Martin; Klinkby, Esben Bryndt; Larsen, Axel Wright; Leipold, Frank; Lopes, André; Luis, Raul; Naulin, Volker; Nielsen, Stefan K.; Nonbøl, Erik; Rasmussen, Jesper; Salewski, Mirko; Stejner, Morten; Taormina, Arianna; Vale, Alberto; Vidal, Catarina; Sanchez, Laura; Ballester, Raul M.; Udintsev, Victor.

In: EPJ Web of Conferences, Vol. 203, 03002, 2019.

Research output: Contribution to journalConference articleResearchpeer-review

TY - GEN

T1 - Design and development of the ITER CTS diagnostic

AU - Korsholm, Søren Bang

AU - Gonçalves, Bruno

AU - Gutierrez, Heidi E.

AU - Henriques, Elsa

AU - Infante, Virginia

AU - Jensen, Thomas

AU - Jessen, Martin

AU - Klinkby, Esben Bryndt

AU - Larsen, Axel Wright

AU - Leipold, Frank

AU - Lopes, André

AU - Luis, Raul

AU - Naulin, Volker

AU - Nielsen, Stefan K.

AU - Nonbøl, Erik

AU - Rasmussen, Jesper

AU - Salewski, Mirko

AU - Stejner, Morten

AU - Taormina, Arianna

AU - Vale, Alberto

AU - Vidal, Catarina

AU - Sanchez, Laura

AU - Ballester, Raul M.

AU - Udintsev, Victor

PY - 2019

Y1 - 2019

N2 - The Collective Thomson Scattering (CTS) diagnostic will be a primary diagnostic for measuring the dynamics of the confined fusion born alpha particles in ITER and will be the only diagnostic for alphas below 1.7 MeV [1]. The probe beam of the CTS diagnostic comes from a 60 GHz 1 MW gyrotron operated in a ~100 Hz modulation sequence. In the plasma, the probing beam will be scattered off fluctuations primarily due to the dynamics of the ions. Seven fixed receiver mirrors will pick up scattered radiation (the CTS signal) from seven measurement volumes along the probe beam covering the cross section of the plasma. The diagnostic is planned to provide a temporal resolution of ~100 ms and a spatial resolution of ~a/4 in the core and ~a/20 near the plasma edge where a = 2.0 m is the nominal minor radius of ITER. The front-end quasi-optics will be installed in an equatorial port plug (EPP#12). A particular challenge will be to pass the probing beam through the fundamental electron cyclotron resonance, which is located in the port plug (R=10.3 m) for the nominal magnetic field Bt = 5.3 T. Hence, particular mitigation actions against arcing have to be applied. The status of the design and specific challenges will be discussed.

AB - The Collective Thomson Scattering (CTS) diagnostic will be a primary diagnostic for measuring the dynamics of the confined fusion born alpha particles in ITER and will be the only diagnostic for alphas below 1.7 MeV [1]. The probe beam of the CTS diagnostic comes from a 60 GHz 1 MW gyrotron operated in a ~100 Hz modulation sequence. In the plasma, the probing beam will be scattered off fluctuations primarily due to the dynamics of the ions. Seven fixed receiver mirrors will pick up scattered radiation (the CTS signal) from seven measurement volumes along the probe beam covering the cross section of the plasma. The diagnostic is planned to provide a temporal resolution of ~100 ms and a spatial resolution of ~a/4 in the core and ~a/20 near the plasma edge where a = 2.0 m is the nominal minor radius of ITER. The front-end quasi-optics will be installed in an equatorial port plug (EPP#12). A particular challenge will be to pass the probing beam through the fundamental electron cyclotron resonance, which is located in the port plug (R=10.3 m) for the nominal magnetic field Bt = 5.3 T. Hence, particular mitigation actions against arcing have to be applied. The status of the design and specific challenges will be discussed.

U2 - 10.1051/epjconf/201920303002

DO - 10.1051/epjconf/201920303002

M3 - Conference article

VL - 203

JO - E P J Web of Conferences

JF - E P J Web of Conferences

SN - 2100-014X

M1 - 03002

ER -