1984年底提出高压倍加器增出电子束的工作。1985年第四季度,高压在200—500kV范围内,在加速管后面的测束仪上,得到的电子束流强为2—3.4 mA。用于电子束引出(真空系统)的喇叭形真空盒,其机械加工于1986年年底完成,随即进行清洗、组装,1987年元月初,对喇叭形真空盒进行了高真空试验,在1200×40mm的电子束引出窗口上装上30μm厚的钛膜,试验一次成功。 The end of 1984 put forward a high voltage doubler to increase the work of electron beam. In the fourth quarter of 1985, the high beam was in the range of 200-500 kV and the beam current on the beam analyzer behind the accelerating tube was 2-3.4 mA. The horn-shaped vacuum box for electron beam extraction (vacuum system) was machined at the end of 1986 and was cleaned and assembled immediately. In early January 1987, a high-vacuum test was performed on a flared vacuum box at 1200 × 40 mm Of the electron beam lead-out window mounted on a 30μm thick titanium film, the test was successful.