标题： 空间中基于紫外微LED的引力波探测中的测试质量电荷管理 显示英文标题

标题： Test mass charge management in the detection of gravitational waves in space based on UV micro-LED

摘要： 作为紫外发光二极管(UV LED)的替代方案，实验研究了在空间引力波探测中的电荷管理中使用紫外微发光二极管的可行性。 与UV LED相比，微发光二极管尺寸更紧凑，电流分布更好，响应时间更快，工作寿命更长。 测量了微发光二极管的性能特性，每个相应的微发光二极管的峰值波长分别为254 nm、262 nm、274 nm和282 nm，并展示了光电效应。 通过将上述微发光二极管安装在立方测试质量上，证明了基于微发光二极管的电荷管理实验的有效性，并通过使用脉宽调制(PWM)改变驱动电流和占空比实现了不同的放电速率。 实验室数据也展示了微发光二极管器件的空间合格性，微发光二极管的关键电气和光学特性变化小于5%。 资格认证的结果使微发光二极管器件的技术成熟度(TRL)达到TRL-5。 如果进行额外的辐射和热测试，并处于准备好在太空中飞行和进一步测试的位置，将达到TRL-6。 显示英文摘要

摘要： As an alternative to the ultraviolet light emitting diode(UV LED), the feasibility of utilizing UV micro-LED in the charge management in the detection of gravitational waves in space is experimentally studied. Compared with UV LED, micro-LED is more compact in size, has better current spreading, faster response time and longer operating life. Performance characteristics of micro-LEDs were measured, with peak wavelength of 254 nm, 262 nm, 274 nm, and 282 nm for each respective micro-LED, and the photoelectric effect was demonstrated. The effectiveness of micro-LED based charge management experiments were demonstrated using above micro-LEDs mounted on a cubical test mass, and different discharge rates were achieved by varying the drive current and duty cycle using pulse width modulation(PWM). Laboratory data was also shown to demonstrate the space qualification of the micro-LED device, the key electrical and optical characteristics of the micro-LEDs showed less than 5% variation. The results of the qualification bring the micro-LED device Technology Readiness Level(TRL) to TRL-5. TRL-6 will be reached provided additional radiation and thermal tests are conducted and in a position ready to be flown and further tested in space.