Divertor heat loads from thermal and alpha particles in a compact stellarator reactor

T. K. Mau; T. B. Kaiser; J. F. Lyon; R. Maingi; A. R. Raffray; X. Wang; L. P. Ku; M. Zarnstorff

doi:10.1109/FUSION.2007.4337872

Divertor heat loads from thermal and alpha particles in a compact stellarator reactor

T. K. Mau, T. B. Kaiser, J. F. Lyon, R. Maingi, A. R. Raffray, X. Wang, L. P. Ku, M. Zarnstorff

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Divertor heat load distributions due to thermal and alpha particles have been assessed in an NCSX-based compact stellarator reactor. A divertor plate system is envisaged, with 4 plates per field period and covering 7% of the plasma surface area. The field-line tracing technique is employed; for thermal flux, the conventional approach is used, while for alphas, their characteristic exit pattern from the plasma and subsequent gyroorbits are approximated. For the ARIES-CS reference design point (R=7.75 m, A=4.5, B=5.7 T, β=6.4% and P_net=1000 MW), combined peak heat loads in the 5-18 MW/m² range on the plates have been obtained, assuming a 75% radiation fraction both in the core and at the edge, and a 5% alpha loss fraction. The alpha heat flux could be a dominant determining factor. Further optimization study is warranted to lower all peak heat loads to satisfy the accepted limit of ≤10 MW/m ².

Original language	English (US)
Title of host publication	Proceedings of the 22nd IEEE/NPSS Symposium on Fusion Engineering - SOFE 07
DOIs	https://doi.org/10.1109/FUSION.2007.4337872
State	Published - 2007
Externally published	Yes
Event	22nd IEEE/NPSS Symposium on Fusion Engineering - SOFE 07 - Albuquerque, NM, United States Duration: Jun 17 2007 → Jun 21 2007

Publication series

Name	Proceedings - Symposium on Fusion Engineering

Conference

Conference	22nd IEEE/NPSS Symposium on Fusion Engineering - SOFE 07
Country/Territory	United States
City	Albuquerque, NM
Period	6/17/07 → 6/21/07

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Nuclear Energy and Engineering

Keywords

Alpha particles
Divertor
Heat load
Reactor
Stellarator

Access to Document

10.1109/FUSION.2007.4337872

Cite this

Mau, T. K., Kaiser, T. B., Lyon, J. F., Maingi, R., Raffray, A. R., Wang, X., Ku, L. P., & Zarnstorff, M. (2007). Divertor heat loads from thermal and alpha particles in a compact stellarator reactor. In Proceedings of the 22nd IEEE/NPSS Symposium on Fusion Engineering - SOFE 07 Article 4337872 (Proceedings - Symposium on Fusion Engineering). https://doi.org/10.1109/FUSION.2007.4337872

@inproceedings{9bcb4f43f7344aa79d4e461841c8b948,

title = "Divertor heat loads from thermal and alpha particles in a compact stellarator reactor",

abstract = "Divertor heat load distributions due to thermal and alpha particles have been assessed in an NCSX-based compact stellarator reactor. A divertor plate system is envisaged, with 4 plates per field period and covering 7\% of the plasma surface area. The field-line tracing technique is employed; for thermal flux, the conventional approach is used, while for alphas, their characteristic exit pattern from the plasma and subsequent gyroorbits are approximated. For the ARIES-CS reference design point (R=7.75 m, A=4.5, B=5.7 T, β=6.4\% and Pnet=1000 MW), combined peak heat loads in the 5-18 MW/m2 range on the plates have been obtained, assuming a 75\% radiation fraction both in the core and at the edge, and a 5\% alpha loss fraction. The alpha heat flux could be a dominant determining factor. Further optimization study is warranted to lower all peak heat loads to satisfy the accepted limit of ≤10 MW/m 2.",

keywords = "Alpha particles, Divertor, Heat load, Reactor, Stellarator",

author = "Mau, \{T. K.\} and Kaiser, \{T. B.\} and Lyon, \{J. F.\} and R. Maingi and Raffray, \{A. R.\} and X. Wang and Ku, \{L. P.\} and M. Zarnstorff",

year = "2007",

doi = "10.1109/FUSION.2007.4337872",

language = "English (US)",

isbn = "1424411947",

series = "Proceedings - Symposium on Fusion Engineering",

booktitle = "Proceedings of the 22nd IEEE/NPSS Symposium on Fusion Engineering - SOFE 07",

note = "22nd IEEE/NPSS Symposium on Fusion Engineering - SOFE 07 ; Conference date: 17-06-2007 Through 21-06-2007",

}

Mau, TK, Kaiser, TB, Lyon, JF, Maingi, R, Raffray, AR, Wang, X, Ku, LP & Zarnstorff, M 2007, Divertor heat loads from thermal and alpha particles in a compact stellarator reactor. in Proceedings of the 22nd IEEE/NPSS Symposium on Fusion Engineering - SOFE 07., 4337872, Proceedings - Symposium on Fusion Engineering, 22nd IEEE/NPSS Symposium on Fusion Engineering - SOFE 07, Albuquerque, NM, United States, 6/17/07. https://doi.org/10.1109/FUSION.2007.4337872

TY - GEN

T1 - Divertor heat loads from thermal and alpha particles in a compact stellarator reactor

AU - Mau, T. K.

AU - Kaiser, T. B.

AU - Lyon, J. F.

AU - Maingi, R.

AU - Raffray, A. R.

AU - Wang, X.

AU - Ku, L. P.

AU - Zarnstorff, M.

PY - 2007

Y1 - 2007

N2 - Divertor heat load distributions due to thermal and alpha particles have been assessed in an NCSX-based compact stellarator reactor. A divertor plate system is envisaged, with 4 plates per field period and covering 7% of the plasma surface area. The field-line tracing technique is employed; for thermal flux, the conventional approach is used, while for alphas, their characteristic exit pattern from the plasma and subsequent gyroorbits are approximated. For the ARIES-CS reference design point (R=7.75 m, A=4.5, B=5.7 T, β=6.4% and Pnet=1000 MW), combined peak heat loads in the 5-18 MW/m2 range on the plates have been obtained, assuming a 75% radiation fraction both in the core and at the edge, and a 5% alpha loss fraction. The alpha heat flux could be a dominant determining factor. Further optimization study is warranted to lower all peak heat loads to satisfy the accepted limit of ≤10 MW/m 2.

AB - Divertor heat load distributions due to thermal and alpha particles have been assessed in an NCSX-based compact stellarator reactor. A divertor plate system is envisaged, with 4 plates per field period and covering 7% of the plasma surface area. The field-line tracing technique is employed; for thermal flux, the conventional approach is used, while for alphas, their characteristic exit pattern from the plasma and subsequent gyroorbits are approximated. For the ARIES-CS reference design point (R=7.75 m, A=4.5, B=5.7 T, β=6.4% and Pnet=1000 MW), combined peak heat loads in the 5-18 MW/m2 range on the plates have been obtained, assuming a 75% radiation fraction both in the core and at the edge, and a 5% alpha loss fraction. The alpha heat flux could be a dominant determining factor. Further optimization study is warranted to lower all peak heat loads to satisfy the accepted limit of ≤10 MW/m 2.

KW - Alpha particles

KW - Divertor

KW - Heat load

KW - Reactor

KW - Stellarator

UR - https://www.scopus.com/pages/publications/47749149215

UR - https://www.scopus.com/inward/citedby.url?scp=47749149215&partnerID=8YFLogxK

U2 - 10.1109/FUSION.2007.4337872

DO - 10.1109/FUSION.2007.4337872

M3 - Conference contribution

AN - SCOPUS:47749149215

SN - 1424411947

SN - 9781424411948

T3 - Proceedings - Symposium on Fusion Engineering

BT - Proceedings of the 22nd IEEE/NPSS Symposium on Fusion Engineering - SOFE 07

T2 - 22nd IEEE/NPSS Symposium on Fusion Engineering - SOFE 07

Y2 - 17 June 2007 through 21 June 2007

ER -

Divertor heat loads from thermal and alpha particles in a compact stellarator reactor

Abstract

Publication series

Conference

All Science Journal Classification (ASJC) codes

Keywords

Access to Document

Other files and links

Fingerprint

Cite this