公开(公告)号：US3675072A

公开(公告)日：1972-07-04

申请号：US3675072D

申请日：1971-01-28

申请人： ATOMIC ENERGY COMMISSION

发明人： HAHN RICHARD L ,  STONE ROLAND L ,  TARRANT JAMES R ,  HUNT LEE D

IPC分类号： F16K31/02 ,  H01J13/28 ,  H05H6/00 ,  H05H7/00 ,  F16K31/06 ,  H05H7/10

CPC分类号： H05H7/00 ,  F16K31/02 ,  H01J13/28 ,  H01J2893/0086 ,  H05H6/00 ,  Y10T137/7761

摘要： A fast-closing valve system has been provided which operates to protect a cyclotron from loss of vacuum and backwash of radioactive contamination when using intensely alpha-active actinide targets. The valve portion consists of a valve chamber adapted for mounting in a beam tube and having aligned ports on opposite sides through which the accelerated particle beam travels. A valve gate is slidably mounted in the valve chamber between the ports and normally urged into a seated position, closing the ports, by means of compression springs. The valve gate is held open by means of an electromagnet and, when the current to the electromagnet is suddenly shorted, the magnetic field rapidly collapses and the springs slam the valve gate into the seated position. The circuit controlling the actuation of the electromagnet uses a spark plug as a pressure sensor mounted in the beam tube, downstream of the valve and when a slight pressure rise in the beam tube occurs the spark plug fires triggering the control circuit which, in turn, shorts the electromagnet. A plurality of annular baffles are mounted in the beam tube to retard the shock wave from pressurized gas backwash in the case of an accident, such as a target rupture, allowing the valve to close before the gas reaches the valve assembly.

摘要翻译： 已经提供了一种快速关闭阀系统，其用于在使用强烈的α活性锕系元素靶时，保护回旋加速器不会损失真空和反冲洗放射性污染物。 阀部分包括适于安装在梁管中的阀室，并且在相对侧上具有对准的端口，加速的粒子束穿过该端口行进。 阀门可滑动地安装在端口之间的阀室中，并且通过压缩弹簧通常被推入到就座位置，从而关闭端口。 阀门通过电磁铁保持打开，当到电磁铁的电流突然短路时，磁场迅速塌陷，弹簧将阀门撞到就座位置。 控制电磁铁致动的电路使用火花塞作为安装在梁管中的压力传感器，在阀的下游，并且当射束管中的轻微压力升高时，火花塞触发触发控制电路， 短路电磁铁。 多个环形挡板安装在梁管中，以在发生事故（例如目标破裂）的情况下阻止来自加压气体反冲洗的冲击波，从而允许阀在气体到达阀组件之前关闭。