Implementation of LHCD experiments on alcator C-mod

R. Parker; N. Basse; W. Beck; S. Bernabei; R. Childs; R. Ellis; E. Fredd; N. Greenough; M. Grimes; D. Gwinn; J. Hosea; J. Irby; P. Koert; C. C. Kung; B. Labombard; J. Liptac; G. D. Loesser; E. Marmar; G. Schilling; D. Terry; J. Terry; R. Vieira; G. Wallace; J. R. Wilson; J. Zaks

doi:10.1063/1.2098250

Implementation of LHCD experiments on alcator C-mod

R. Parker, N. Basse, W. Beck, S. Bernabei, R. Childs, R. Ellis, E. Fredd, N. Greenough, M. Grimes, D. Gwinn, J. Hosea, J. Irby, P. Koert, C. C. Kung, B. Labombard, J. Liptac, G. D. Loesser, E. Marmar, G. Schilling, D. TerryJ. Terry, R. Vieira, G. Wallace, J. R. Wilson, J. Zaks

PPPL Engineering

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

Abstract

An antenna-transmitter system for driving current in the LHRF has been installed in Alcator C-Mod. The antenna is a grill consisting of 4 poloidal rows of waveguides, each with 24 guides in the toroidal direction. Power is supplied by 12 klystrons capable of 250 kW operation at a frequency of 4.6 GHz. Thus the total source power is 3 MW, with about 1.5 MW available to be coupled to the plasma. Power supply and heat throughput limits in C-Mod limit the pulse length to 5 s, which however represents several current redistribution times. With 90° phasing, the n_∥ spectrum is sharply peaked at 2.3 and the range 1.5 < n_∥ < 3.5 can be accessed dynamically by varying the phase of the klystrons. The system is in the commissioning phase with klystron power limited to ∼20 kW and pulse length to 10 ms. Early results from plasma operation are discussed.

Original language	English (US)
Title of host publication	RADIO FREQUENCY POWER IN PLASMAS
Subtitle of host publication	16th Topical Conference on Radio Frequency Power in Plasmas
Pages	327-330
Number of pages	4
DOIs	https://doi.org/10.1063/1.2098250
State	Published - Sep 26 2005
Event	RADIO FREQUENCY POWER IN PLASMAS: 16th Topical Conference on Radio Frequency Power in Plasmas - Park City, UT, United States Duration: Apr 11 2005 → Apr 13 2005

Publication series

Name	AIP Conference Proceedings
Volume	787
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Conference

Conference	RADIO FREQUENCY POWER IN PLASMAS: 16th Topical Conference on Radio Frequency Power in Plasmas
Country/Territory	United States
City	Park City, UT
Period	4/11/05 → 4/13/05

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

Keywords

Alcator C-Mod
Lower Hybrid Current Drive

Access to Document

10.1063/1.2098250

Cite this

Parker, R., Basse, N., Beck, W., Bernabei, S., Childs, R., Ellis, R., Fredd, E., Greenough, N., Grimes, M., Gwinn, D., Hosea, J., Irby, J., Koert, P., Kung, C. C., Labombard, B., Liptac, J., Loesser, G. D., Marmar, E., Schilling, G., ... Zaks, J. (2005). Implementation of LHCD experiments on alcator C-mod. In RADIO FREQUENCY POWER IN PLASMAS: 16th Topical Conference on Radio Frequency Power in Plasmas (pp. 327-330). (AIP Conference Proceedings; Vol. 787). https://doi.org/10.1063/1.2098250

@inproceedings{e2dfbced5e8f46a0b409fb77d3608cf2,

title = "Implementation of LHCD experiments on alcator C-mod",

abstract = "An antenna-transmitter system for driving current in the LHRF has been installed in Alcator C-Mod. The antenna is a grill consisting of 4 poloidal rows of waveguides, each with 24 guides in the toroidal direction. Power is supplied by 12 klystrons capable of 250 kW operation at a frequency of 4.6 GHz. Thus the total source power is 3 MW, with about 1.5 MW available to be coupled to the plasma. Power supply and heat throughput limits in C-Mod limit the pulse length to 5 s, which however represents several current redistribution times. With 90° phasing, the n∥ spectrum is sharply peaked at 2.3 and the range 1.5 < n∥ < 3.5 can be accessed dynamically by varying the phase of the klystrons. The system is in the commissioning phase with klystron power limited to ∼20 kW and pulse length to 10 ms. Early results from plasma operation are discussed.",

keywords = "Alcator C-Mod, Lower Hybrid Current Drive",

author = "R. Parker and N. Basse and W. Beck and S. Bernabei and R. Childs and R. Ellis and E. Fredd and N. Greenough and M. Grimes and D. Gwinn and J. Hosea and J. Irby and P. Koert and Kung, \{C. C.\} and B. Labombard and J. Liptac and Loesser, \{G. D.\} and E. Marmar and G. Schilling and D. Terry and J. Terry and R. Vieira and G. Wallace and Wilson, \{J. R.\} and J. Zaks",

year = "2005",

month = sep,

day = "26",

doi = "10.1063/1.2098250",

language = "English (US)",

isbn = "0735402760",

series = "AIP Conference Proceedings",

pages = "327--330",

booktitle = "RADIO FREQUENCY POWER IN PLASMAS",

note = "RADIO FREQUENCY POWER IN PLASMAS: 16th Topical Conference on Radio Frequency Power in Plasmas ; Conference date: 11-04-2005 Through 13-04-2005",

}

Parker, R, Basse, N, Beck, W, Bernabei, S, Childs, R, Ellis, R, Fredd, E, Greenough, N, Grimes, M, Gwinn, D, Hosea, J, Irby, J, Koert, P, Kung, CC, Labombard, B, Liptac, J, Loesser, GD, Marmar, E, Schilling, G, Terry, D, Terry, J, Vieira, R, Wallace, G, Wilson, JR & Zaks, J 2005, Implementation of LHCD experiments on alcator C-mod. in RADIO FREQUENCY POWER IN PLASMAS: 16th Topical Conference on Radio Frequency Power in Plasmas. AIP Conference Proceedings, vol. 787, pp. 327-330, RADIO FREQUENCY POWER IN PLASMAS: 16th Topical Conference on Radio Frequency Power in Plasmas, Park City, UT, United States, 4/11/05. https://doi.org/10.1063/1.2098250

TY - GEN

T1 - Implementation of LHCD experiments on alcator C-mod

AU - Parker, R.

AU - Basse, N.

AU - Beck, W.

AU - Bernabei, S.

AU - Childs, R.

AU - Ellis, R.

AU - Fredd, E.

AU - Greenough, N.

AU - Grimes, M.

AU - Gwinn, D.

AU - Hosea, J.

AU - Irby, J.

AU - Koert, P.

AU - Kung, C. C.

AU - Labombard, B.

AU - Liptac, J.

AU - Loesser, G. D.

AU - Marmar, E.

AU - Schilling, G.

AU - Terry, D.

AU - Terry, J.

AU - Vieira, R.

AU - Wallace, G.

AU - Wilson, J. R.

AU - Zaks, J.

PY - 2005/9/26

Y1 - 2005/9/26

N2 - An antenna-transmitter system for driving current in the LHRF has been installed in Alcator C-Mod. The antenna is a grill consisting of 4 poloidal rows of waveguides, each with 24 guides in the toroidal direction. Power is supplied by 12 klystrons capable of 250 kW operation at a frequency of 4.6 GHz. Thus the total source power is 3 MW, with about 1.5 MW available to be coupled to the plasma. Power supply and heat throughput limits in C-Mod limit the pulse length to 5 s, which however represents several current redistribution times. With 90° phasing, the n∥ spectrum is sharply peaked at 2.3 and the range 1.5 < n∥ < 3.5 can be accessed dynamically by varying the phase of the klystrons. The system is in the commissioning phase with klystron power limited to ∼20 kW and pulse length to 10 ms. Early results from plasma operation are discussed.

AB - An antenna-transmitter system for driving current in the LHRF has been installed in Alcator C-Mod. The antenna is a grill consisting of 4 poloidal rows of waveguides, each with 24 guides in the toroidal direction. Power is supplied by 12 klystrons capable of 250 kW operation at a frequency of 4.6 GHz. Thus the total source power is 3 MW, with about 1.5 MW available to be coupled to the plasma. Power supply and heat throughput limits in C-Mod limit the pulse length to 5 s, which however represents several current redistribution times. With 90° phasing, the n∥ spectrum is sharply peaked at 2.3 and the range 1.5 < n∥ < 3.5 can be accessed dynamically by varying the phase of the klystrons. The system is in the commissioning phase with klystron power limited to ∼20 kW and pulse length to 10 ms. Early results from plasma operation are discussed.

KW - Alcator C-Mod

KW - Lower Hybrid Current Drive

UR - https://www.scopus.com/pages/publications/33749657454

UR - https://www.scopus.com/inward/citedby.url?scp=33749657454&partnerID=8YFLogxK

U2 - 10.1063/1.2098250

DO - 10.1063/1.2098250

M3 - Conference contribution

AN - SCOPUS:33749657454

SN - 0735402760

SN - 9780735402768

T3 - AIP Conference Proceedings

SP - 327

EP - 330

BT - RADIO FREQUENCY POWER IN PLASMAS

T2 - RADIO FREQUENCY POWER IN PLASMAS: 16th Topical Conference on Radio Frequency Power in Plasmas

Y2 - 11 April 2005 through 13 April 2005

ER -

Implementation of LHCD experiments on alcator C-mod

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All Science Journal Classification (ASJC) codes

Keywords

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