BETATRON WITH CONTRACTION AND EXPANSION COIL Russian patent published in 2014 - IPC H05H11/00 

FIELD: physics.

SUBSTANCE: Betatron (1), especially in X-ray testing apparatus, having a rotationally symmetrical inner yoke having two interspaced parts (2a, 2b), an outer yoke (4) connecting the two inner yoke parts (2a, 2b), at least one main field coil (6a, 6b), a toroidal betatron tube (5) placed between the inner yoke parts (2a, 2b), at least one contraction and expansion coil (CE coil) 7a, 7b, wherein exactly one CE coil (7a, 7b) is respectively placed between the front side of the inner yoke part (2a, 2b) and the betatron tube (5), and the radius of the CE coil (7a, 7b) is essentially equal to the given orbital radius of the electrons in the betatron tube (5). The betatron has an electronic control circuit (8); contraction and expansion coil (7a, 7b) leads are connected to a current or voltage source (11), and in at least one line between the contraction and expansion coil (7a, 7b) and the current or voltage source (11), there is a switch (9) which is controlled by the electronic control circuit (8), wherein the electronic control circuit (8) is configured to cause flow of current through the contraction and expansion coil, during emission of electrons, such that yoke material is situated on the nonlinear portion of a hysteresis curve.

EFFECT: high efficiency.

7 cl, 4 dwg