[특허]System and method for controlling plasma magnetic field

[미국특허] System and method for controlling plasma magnetic field 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H05H-001/04 H05H-001/00 G01R-019/00 G01R-033/028
출원번호	US-0502902 (2015-08-18)
등록번호	US-9967963 (2018-05-08)
국제출원번호	PCT/CA2015/050784 (2015-08-18)
국제공개번호	WO2016/026040 (2016-02-25)
발명자 / 주소	Zindler, Ryan Walter Fraser, Jonathan Damian
출원인 / 주소	General Fusion Inc.
대리인 / 주소	Knobbe, Martens, Olson & Bear, LLP
인용정보	피인용 횟수 : 0 인용 특허 : 62

초록 ▼

Examples of a system for generating and confining a compact toroid are disclosed. The system comprises a plasma generator for generating magnetized plasma, a flux conserver for receiving the compact toroid, a power source for providing current pulse and a controller for actively controlling a current profile of the pulse to keep plasma's q-profile within pre-determined range. Examples of methods of controlling a magnetic lifetime of a magnetized plasma by controlling a current profile of the current pulse are disclosed.

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1. A system for controlling magnetic lifetime of a magnetized plasma, the system comprising: a controller comprising an input unit, a processing unit and an output unit;a plurality of measuring probes positioned at various radial, axial and angular positions, each of the plurality of measuring probes configured to provide signals of at least one parameter of the plasma to the input unit of the controller; anda power source in communication with the output unit of the controller, the power source configured to provide one or more additional current pulses to the system to increase a toroidal magnetic field of the plasma, and having means for adjusting an inductance-to-resistance (L/R) time constant of the power source to adjust a current decay of the current pulses,the controller having a memory comprising program code executable by the processing unit to process the signals obtained from the plurality of measuring probes to detect an irregularity in the obtained signals and trigger the power source to provide an additional current pulse based on a detected irregularity in the signal of at least one probe,wherein the L/R time constant of the power source is adjusted to be shorter than a shortest decay time of a poloidal field of the plasma. 2. The system of claim 1, wherein the means for adjusting the L/R time constant is an inductor. 3. The system of claim 1, wherein the controller further comprises program code executable by the processing unit to further calculate a ratio of the toroidal to poloidal magnetic field of the plasma, compare the calculated ratio to an empirically derived lower threshold value and trigger the power source to provide the additional current pulse when the calculated ratio is below the lower threshold value. 4. The system of claim 3, wherein the controller further comprises program code executable by the processing unit to maintain the toroidal to poloidal magnetic field ratio between the lower threshold value and an upper threshold value. 5. The system of claim 1, wherein the controller further comprises program code executable by the processing unit to further detect any oscillations in any signals obtained from the plurality of measuring probes, the additional current pulse being triggered when oscillations are detected in a signal obtained from at least one of the probes. 6. The system of claim 5, wherein the controller further comprises program code executable by the processing unit to calculate an instability mode of the plasma based on a phase of the oscillations in the signals obtained from the probes positioned at different angular positions, the program code further executable to adjust timing of the triggering of the additional current pulse based on the calculated instability mode. 7. A method for controlling a magnetic lifetime of a magnetized plasma, the method comprising: adjusting an inductance to resistance (L/R) time constant of a power source to be shorter than a shortest decay time of a poloidal field of the magnetized plasma;measuring one or more parameters of the plasma by a plurality of probes positioned at various radial, axial and angular positions in a wall of a flux conserving chamber to detect the parameters at various position from a magnetic axis of the plasma;processing signals obtained from the plurality of probes and detecting an irregularity in the obtained signals; andtriggering the power source to provide an additional current pulse based on a detected irregularity in a signal of at least one probe. 8. The method of claim 7, wherein the method further comprises calculating a ratio of toroidal to poloidal magnetic field of the plasma, comparing the calculated ratio to an empirically derived lower threshold value and triggering the power source to provide the additional current pulse when the calculated ratio is below the empirically derived lower threshold value. 9. The method of claim 7, wherein the method further comprises detecting whether any oscillations are present in the signals obtained from the probes and triggering the additional current pulse when oscillations are detected. 10. The method of claim 9, wherein the method further comprises calculating an instability mode of the plasma based on a phase of the oscillations in the signals from the probes positioned at different angular position, and adjusting a timing of the triggering of the additional current pulse based on the calculated instability mode.

이 특허에 인용된 특허 (62) 인용/피인용 타임라인 분석

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[미국특허] System and method for controlling plasma magnetic field 원문보기

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