Quench protection method based on internal protection and external protection for 230 MeV superconducting cyclotron superconducting coil

A cyclotron and quench protection technology, which is applied in the usage of superconductor elements, emergency protection circuit devices, electrical components, etc., can solve problems such as quenching of superconducting coils, and achieve the effect of reducing the maximum temperature rise and the probability of damage

Active Publication Date: 2017-01-25
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a 230MeV superconducting cyclotron superconducting coil quench protection based on internal protection and external protection for the problems existing in the superconducting excitation coil quench protection mode in the existing 230MeV superconducting cyclotron superconducting magnet method

Method used

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  • Quench protection method based on internal protection and external protection for 230 MeV superconducting cyclotron superconducting coil

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Embodiment

[0020] Take the quench protection system of a superconducting excitation coil of a 230MeV superconducting cyclotron as an example. The quench protection system is composed of a quench protection control switch, an inner protection cold diode group, a quench heater, an outer protection resistor, and a quench signal detection and control module.

[0021] A quench protection control switch is provided on the connection line between the superconducting excitation coil and the power supply, and the two ends of the superconducting excitation coil are connected with external protection resistors. The group adopts the form of unit series consisting of multiple groups of power diodes connected back-to-back. The inner protective cold diode group is connected to the quench heater. The quench heater is set close to the surface of the superconducting excitation coil. The modules are respectively connected with the superconducting excitation coil and the quench protection control switch.

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Abstract

The invention relates to a quench protection method based on internal protection and external protection for a 230 MeV superconducting cyclotron superconducting coil; a connection line for a superconducting exciting coil and a power supply is provided with a quench protection control switch, two ends of the superconducting exciting coil are connected with external protection resistors, the superconducting exciting coil is also parallelly connected with an internal protection cold diode set, the internal protection cold diode set is connected with a quench heater, and a quench signal detection and control module is connected respectively with the superconducting exiting coil and the quench protection control switch. According to the method, the internal protection cold diode set is used to clamp coil quench voltage, so that the problem that the sole use of a large external protection resistance coil leads to excessively high quench voltage is solved; the coil is evenly quenched by using the embedded heater, and highest temperature rise in the superconducting coil is decreased; chances for the cyclotron superconducting exciting coil to damage upon quenching may be greatly slimmed.

Description

technical field [0001] The invention belongs to cyclotron design technology, in particular to a quench protection method based on internal protection and external protection for a superconducting coil of a 230 MeV superconducting cyclotron. Background technique [0002] The superconducting excitation coil is made of superconducting materials (such as NbTi, Nb 3 Sn and other low-temperature superconducting materials and BSCCO, YBCO and other high-temperature superconducting materials) made of superconducting wires or stranded cables made of superconducting wires. It is usually used to provide large current and strong magnetic field that cannot be provided by conventional normal temperature excitation coils. Superconducting excitation coils can only maintain a superconducting state at extremely low temperatures (at least below the critical temperature of the corresponding superconducting material). At this time, the impedance of the superconducting excitation coil itself is ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/00
CPCH02H7/001Y02E40/60
Inventor 王川葛涛李振国殷治国张天爵尹蒙张素平
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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