Status of the Ecrh System on Hl-2a

Zhou, J.; Rao, Jun; Li, Bo; Huang, Mei; Li, Zhihong; Kang, Z.H.; Feng, He Wang Kun; Wang, Mingwei; Chen, Gangyu; Bu, Yingnan; Wang, Chao; Lü, Bo

doi:10.1142/9789814340274_0005

Cited by 6 publications

(7 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Here X c is the root of Eq. ( 1) and also the eigenvalue of HE 11 mode, J m (x) is the m-th Bessel function, k = 2π/λ is the free space wave number, λ is the wavelength, 2 is the propagation constant and Y is a reactance, defined as [10] :…”

Section: Basic Propagation Theorymentioning

confidence: 99%

“…1 for easier fabrication. This method has been successfully used for the 68 GHz ECRH system on HL-2A [2] .…”

Section: Waveguide Designmentioning

confidence: 99%

“…7 & 8 are the new 2 MW system and Nos. 1 & 2 are a part of the 68 GHz system [2] . The four systems share a port with an inner diameter of 350 mm on HL-2A tokamak.…”

Section: Layout Of the Transmission Linesmentioning

confidence: 99%

“…Electron cyclotron resonance heating is a highly efficient, flexible, localized and controllable heating scheme for torodial plasma confinement systems [1] . Currently, HL-2A has developed and constructed a 3 MW ECRH system at 68 GHz which consists of four 0.5 MW/1 s gyrotrons and two 0.5 MW/1.5 s gyrotrons [2] . With the co-operation of six gyrotrons the highest output power of 2.5 MW has been attained, and also the H-mode discharge has been realized together with the 1 MW NBI system.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Design of the Transmission Lines for 140 GHz ECRH System on HL-2A

Xia

Zhou

Rao

2014

Plasma Sci. Technol.

View full text Add to dashboard Cite

A new 140 GHz/2 MW/3 s electron cyclotron resonance heating (ECRH) system composed of two units is now being constructed on HL-2A. As a part of the system, two transmission lines marked No.7 & 8 play the role of carrying microwave power from two gyrotrons to the tokamak port. Based on the oversized circular corrugated waveguide technology, an evacuated transmission system with high power capability and high transmission efficiency is designed. Details are presented for the design of the corrugated waveguide, the layout of the proposed lines and the vacuum pumping system. Then mode conversion losses due to coupling, misalignment, bends and gaps are discussed to serve as a reference for analyzing the transmission efficiency and alignment. Finally, a dual-modes propagation case consisting of the HE11 and LP11 even modes is discussed

show abstract

Section: Basic Propagation Theorymentioning

confidence: 99%

“…1 for easier fabrication. This method has been successfully used for the 68 GHz ECRH system on HL-2A [2] .…”

Section: Waveguide Designmentioning

confidence: 99%

“…7 & 8 are the new 2 MW system and Nos. 1 & 2 are a part of the 68 GHz system [2] . The four systems share a port with an inner diameter of 350 mm on HL-2A tokamak.…”

Section: Layout Of the Transmission Linesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Design of the Transmission Lines for 140 GHz ECRH System on HL-2A

Xia

Zhou

Rao

2014

Plasma Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…The HL-2A is a divertor tokamak which mainly focuses on the issues of fusion research, such as confinement improvement, divertor and scrape-off layer physics, wall conditioning, magnetohydrodynamics (MHD) instability and energetic particles, auxiliary heating and current drive [3] . Currently, the HL-2A is equipped with a 3 MW/68 GHz ECRH system [4] and, in addition, a new 2 MW/140 GHz system is under construction [5] .…”

Section: Introductionmentioning

confidence: 99%

The 5.8 T Cryogen-Free Gyrotron Superconducting Magnet System on HL-2A

Xia

Huang

Zhou

et al. 2014

Plasma Sci. Technol.

Self Cite

View full text Add to dashboard Cite

A 5.8 T cryogen-free superconducting magnet (SCM) system with a warm bore hole of 160 mm in diameter, used for gyrotrons operating in the frequency range from 68 GHz to 140 GHz, is installed on the site of the HL-2A tokamak. The SCM consists of two separate solenoidal magnetic coils connected in series, a 4.2 K Gifford-McMahon (GM) refrigerator, a compressor, a coil power supply and two temperature monitors. The performance, test and preliminary experimental results of this SCM system are described in this paper. The magnetic field distribution was measured along the axis, and a dummy tube was used for adjusting the magnet system. Finally, the magnet was used for the operation of a 68 GHz/500 kW gyrotron, which is part of an electron cyclotron resonance heating (ECRH) system. With an additional auxiliary coil and after adjusting the magnet system, a maximum output power for the ECRH system of up to 400 kW was achieved.

show abstract