公开(公告)号：US4572957A

公开(公告)日：1986-02-25

申请号：US606704

申请日：1984-05-03

Applicant: Pertti Puumalainen ,  Pertti Sikanen

Inventor： Pertti Puumalainen ,  Pertti Sikanen

IPC: H01J37/30 ,  A61L2/08 ,  B01J19/12 ,  B05C9/14 ,  B29C35/08 ,  C08F2/54 ,  G21K1/00 ,  G21K5/04 ,  H01J33/02 ,  H01J37/15 ,  H01J33/00

CPC classification number: H01J33/02

Abstract: The invention concerns a device for creating an electron curtain (5). The device consists of a cylindrical chamber (1) in which has been accommodated an elongated, electron-emitting filament (2) and a shell (3) encircling the filament so that the filament is located in an elongated depression (6) formed by the shell. Furthermore, the device comprises members (7) for accelerating the electrons and a window (4) in the wall of the chamber (1), through which the electron curtain can be directed to the outside of the device. The shell (3) encircling the filament (2) has on both margins of the depression (6) been shaped into an accelerating electrode (7) which can be brought to a negative potential with reference to the wall of the chamber (1), and the depression constitutes a diffusion volume for the electrons emitted from the filament and in the region of which there are mouldable parts, such as the accelerating electrodes (7) or the additional electrodes (9) on the bottom of the depression, by the aid of which the admission of electrons into the accelerating electric field and thereby the intensity of the electron curtain (5) that is produced are adjustable. Owing to the diffusion of electrons, it is possible with the means to produce an electron curtain with uniform intensity, and by suitably shaping the parts (7,9), the intensity distribution of the curtain may be adjusted in desired manner.

Abstract translation: 本发明涉及一种用于产生电子幕（5）的装置。 该装置由圆柱形的腔室（1）组成，其中已经容纳有细长的电子发射丝（2）和围绕细丝的壳体（3），使得细丝位于由 贝壳。 此外，该装置包括用于加速电子的构件（7）和在室（1）的壁中的窗口（4），电子窗可以通过该窗口被引导到装置的外部。 围绕灯丝（2）的外壳（3）在凹部（6）的两边缘上形成加速电极（7），加速电极（7）可相对于腔室（1）的壁而变为负电位， 并且凹陷构成从灯丝发射的电子的扩散体积，并且在其中具有可模制部分的区域中，例如加速电极（7）或在凹陷的底部上的附加电极（9）的帮助 其中电子进入加速电场以及由此产生的电子幕（5）的强度是可调节的。 由于电子的扩散，可以通过手段产生具有均匀强度的电子窗帘，并且通过适当地成形部件（7,9），可以以期望的方式调节帘幕的强度分布。