The Wuhan National High Magnetic Field Center is incorporating the flat-top pulsed magnetic field (FTPMF) into pulse gyrotrons. It will be the first chance to make a pulse-magnet gyrotron available for generating a long-pulse radiation of 100 ms or above without affecting its high operating frequency and high radiation power. However, unlike continuous wave gyrotrons, pulse gyrotrons in long-term operation have their own challenges, namely, misalignment caused by concussions, much stronger low-frequency electromagnetic interference from the pulse magnet, and inevitable explosion. This article will focus on the difficulties faced by pulse gyrotrons in years of operation, discuss the protection and restoration from failures, and, consequently, propose a fully redundant, explosion-proof, and quickly recoverable auxiliary system for long-term operation of pulse gyrotrons. This system integrates the control unit of traditional pulsed magnets and superconducting magnets so that it can be compatible with any form of gyrotron facilities. Therefore, once the FTPMF or the superconducting magnet is available, the long-pulse radiation will be obtained. Several experimental results, including the most recent explosion, show the reliability of the proposed system.

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Population ageing is one of the significant social transformations of the 21st century which poses healthcare challenges for caregivers and creates an enormous global burden in social economy. As reported in China's seventh National Census on 12 May 2021, the population aged 60 and over is 264 million, constituting 18.70% of the total population, of which the population aged 65 and over is 191 million, accounting for 13.50% of the national total population (Tu et al., 2021). It is expected that there will be 365 million aged 65+ Chinese by 2050, a number representing 26.1% of the country's total population. In addition, of this ageing population, 115 million are expected to reach the age of 80 and 0.6 million are expected to become centenarians (Fang et al., 2020).

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