Sorry, here's a cached copy: http://erewhon.superkuh.com/library/Space/Spacecraft/Debris%20Engine_%20A%20Potential%20Thruster%20for%20Space%20Debris%20Removal_%

Sorry, here's a cached copy: http://erewhon.superkuh.com/library/Space/Spacecraft/Debris%20Engine_%20A%20Potential%20Thruster%20for%20Space%20Debris%20Removal_%20Lei%20Lan_%20Jingyang%20Li_%20Hexi%20Baoyin_%20arxiv151107246.pdf http://erewhon.superkuh.com/library/Space/Spacecraft/Debris%... Regardless of any redaction errors, the basic idea is sound. While the particle engine is not able to produce the large impulse of ion drives (low specific ionization), it turns out the optimal impulse for such an application is in the 100-200 range. Any higher and the thrust drops too much prolonging the mission duration, for a given amount of electric power available. For this application the opposite is true: you want maximize thrust and throw away the full mass of the previous target before reaching the next one to be consumed.