Adams, Leonard Caldwell 1921- On the Formation and Collimation of an Axially-symmetrical Hollow Electron Beam
![Adams, Leonard Caldwell 1921- On the Formation and Collimation of an Axially-symmetrical Hollow Electron Beam](https://r.kelkoo.com/resize.php?country=se&merchantId=100565793&categoryId=5101&trackingId=96964074&width=300&height=300&image=https%3A%2F%2Fm.media-amazon.com%2Fimages%2FI%2F41yd-4SdZcL._SL500_.jpg&sign=YsEaSIMYvlrlfT1lF.fs5CQClqD_czH7EMbriEvCAvU-)
On the Formation and Collimation of an Axially-symmetrical Hollow Electron Beam
On the Formation and Collimation of an Axially-symmetrical Hollow Electron Beam