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Rapid demagnetization method for large-energy-storage superconducting coil of circular accelerator

A cyclotron and superconducting coil technology, applied in the direction of superconducting magnets/coils, the usage of superconducting elements, magnetic resonance accelerators, etc., can solve problems such as frequent demagnetization operations, and achieve the effect of reducing the probability of damage

Active Publication Date: 2016-11-09
CHINA INSTITUTE OF ATOMIC ENERGY
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Problems solved by technology

However, in the superconducting cyclotron debugging stage, it is possible to perform frequent demagnetization operations, and a safe and quench-free way is needed to release the energy stored in the superconducting excitation coil to room temperature

Method used

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  • Rapid demagnetization method for large-energy-storage superconducting coil of circular accelerator

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Embodiment

[0019] Take the fast demagnetization process of the superconducting excitation coil of a 230MeV superconducting cyclotron as an example. Such as figure 1 As shown, on the basis of the quench protection system structure, the superconducting excitation coil 5 is also connected in parallel with a fast demagnetization energy leakage diode group 2, and the power supply 6 is disconnected through the fast demagnetization control switch 1; the quench control switch 8 is closed, and the fast demagnetization The energy-discharging diode group 2, the external protection resistor 3, and the internal protection cold diode group 4 are connected in parallel with the superconducting excitation coil 5.

[0020] The turn-on voltage of the fast demagnetization energy-discharging diode group 2 of the present invention is lower than the turn-on voltage of the inner protection cold diode group 4. In the quench protection system, the inner protection cold diode group 4 is composed of two ones that c...

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Abstract

The invention relates to a rapid demagnetization method for a large-energy-storage superconducting coil of a circular accelerator. Through a rapid demagnetization energy release diode set connected with the superconducting coil in parallel, energy stored in the superconducting excitation coil of the superconducting circular accelerator is released to the normal temperature. By means of the method, a quench protection mode based on internal protection and external protection can be adopted for the superconducting circular accelerator, and the probability of damage of the superconducting excitation coil of the superconducting circular accelerator is lowered.

Description

technical field [0001] The invention belongs to cyclotron design technology, in particular to a fast demagnetization method for a large energy storage superconducting coil of a 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 close to zero, there is no Joule heating, the voltage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F6/00H01F13/00H02H9/04H05H13/00
CPCH01F6/003H01F13/006H02H9/04H05H7/04H05H13/005Y02E40/60
Inventor 王川葛涛李振国殷治国尹蒙张素平张天爵
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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