skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: 1.5 MW RF Load for ITER

Abstract

Calabazas Creek Research, Inc. developed a 1.5 MW RF load for the ITER fusion research facility currently under construction in France. This program leveraged technology developed in two previous SBIR programs that successfully developed high power RF loads for fusion research applications. This program specifically focused on modifications required by revised technical performance, materials, and assembly specification for ITER. This program implemented an innovative approach to actively distribute the RF power inside the load to avoid excessive heating or arcing associated with constructive interference. The new design implemented materials and assembly changes required to meet specifications. Critical components were built and successfully tested during the program.

Authors:
 [1];  [1];  [1];  [1];  [1];  [2]
+ Show Author Affiliations
  1. Calabazas Creek Research, Inc., San Mateo, CA (United States)
  2. Lexam Research, Redwood City, CA (United States)
Publication Date:
Research Org.:
Calabazas Creek Research, Inc., San Mateo, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
Contributing Org.:
Lexam Research
OSTI Identifier:
1314091
Report Number(s):
Final Report
TRN: US1601882
DOE Contract Number:
SC0013724
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; POWER RANGE 01-10 MW; ITER TOKAMAK; POWER DEMAND; RF SYSTEMS; HEATING; ELECTRIC ARCS; RF load; dummy load; gyrotron; electron cyclotron heating; ECH

Citation Formats

Ives, Robert Lawrence, Marsden, David, Collins, George, Karimov, Rasul, Mizuhara, Max, and Neilson, Jeffrey. 1.5 MW RF Load for ITER. United States: N. p., 2016. Web. doi:10.2172/1314091.
Copy to clipboard
Ives, Robert Lawrence, Marsden, David, Collins, George, Karimov, Rasul, Mizuhara, Max, & Neilson, Jeffrey. 1.5 MW RF Load for ITER. United States. doi:10.2172/1314091.
Copy to clipboard
Ives, Robert Lawrence, Marsden, David, Collins, George, Karimov, Rasul, Mizuhara, Max, and Neilson, Jeffrey. Thu . "1.5 MW RF Load for ITER". United States. doi:10.2172/1314091. https://www.osti.gov/servlets/purl/1314091.
Copy to clipboard
@article{osti_1314091,
title = {1.5 MW RF Load for ITER},
author = {Ives, Robert Lawrence and Marsden, David and Collins, George and Karimov, Rasul and Mizuhara, Max and Neilson, Jeffrey},
abstractNote = {Calabazas Creek Research, Inc. developed a 1.5 MW RF load for the ITER fusion research facility currently under construction in France. This program leveraged technology developed in two previous SBIR programs that successfully developed high power RF loads for fusion research applications. This program specifically focused on modifications required by revised technical performance, materials, and assembly specification for ITER. This program implemented an innovative approach to actively distribute the RF power inside the load to avoid excessive heating or arcing associated with constructive interference. The new design implemented materials and assembly changes required to meet specifications. Critical components were built and successfully tested during the program.},
doi = {10.2172/1314091},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Sep 01 00:00:00 EDT 2016},
month = {Thu Sep 01 00:00:00 EDT 2016}
}
Copy to clipboard
Technical Report:
View Technical Report (1.53 MB)
DOI:  10.2172/1314091
Save / Share:
Export Metadata
Save to My Library
You must Sign In or Create an Account in order to save documents to your library.

  • Research turbine supports sustained technology development. For more than three decades, engineers at the National Renewable Energy Laboratory's (NREL) National Wind Technology Center (NWTC) have worked with the U.S. Department of Energy (DOE) Wind Program and industry partners to advance wind energy technology, improve wind turbine performance, and reduce the cost of energy. Although there have been dramatic increases in performance and drops in the cost of wind energy-from $0.80 per kilowatt-hour to between $0.06 and $0.08 per kilowatt-hour-the goal of the DOE Wind Program is to further increase performance and reduce the cost of energy for land-based systems somore » that wind energy can compete with natural gas by 2020. In support of the program's research and development (R and D) efforts, NREL has constructed state-of-the-art facilities at the NWTC where industry partners, universities, and other DOE laboratories can conduct tests and experiments to further advance wind technology. The latest facility to come online is the DOE-GE 1.5-MW wind turbine test platform. Working with DOE, NREL purchased and installed a GE 1.5-MW wind turbine at the NWTC in 2009. Since then, NREL engineers have extensively instrumented the machine, conducted power performance and full-system modal tests, and collected structural loads measurements to obtain baseline characterization of the turbine's power curve, vibration characteristics, and fatigue loads in the uniquely challenging NWTC inflow environment. By successfully completing a baseline for the turbine's performance and structural response, NREL engineers have established a test platform that can be used by industry, university, and DOE laboratory researchers to test wind turbine control systems and components. The new test platform will also enable researchers to acquire the measurements needed to develop and validate wind turbine models and improve design codes.« less

  • ; ;

  • ; ; ; ...

  • ; ;

  • The LCLS injector must operate at 120 Hz repetition frequency but to date the maximum operating frequency of an S-band rf gun has been 50 Hz. The high fields desired for the LCLS gun operation limit the repetition frequency due to thermal expansion causing rf detuning and field redistribution. One method of addressing the thermal loading problem is too reduce the power lost on the cavity walls by properly shaping the rf pulse incident on the gun. The idea is to reach the steady state field value in the gun faster than the time constant of the gun would allowmore » when using a flat incident rf pulse. By increasing the incident power by about a factor of three and then decreasing the incident power when the field reaches the desired value in the gun, the field build up time can be decreased by more than a factor of three. Using this technique the heat load is also decreased by more than a factor of three. In addition the rf coupling coefficient can be increased from the typical critically coupled designs to an overcoupled design which also helps reduce the field build up time. Increasing the coupling coefficient from 1 to 2 reduces the heat load by another 25% and still limits the reflected power and coupling hole size to manageable levels.« less