US Pat. No. 10,342,115

HIGH-FREQUENCY-TUNING SLIDING ELECTRICAL CONTACT

HEFEI CAS ION MEDICAL AND...

1. A high-frequency-tuning sliding electrical contact, comprising a tuning ring, sliding between an outer sleeve and an inner sleeve; wherein the outer sleeve is sleeved on the inner sleeve; the tuning ring comprises an inner elastic piece, an upper base, an outer elastic piece and a lower base; the upper base and the lower base are welded as an integrity; the inner elastic piece and the outer elastic piece are uniformly provided along an axial direction and welded on the lower base; pull rods are welded to an upper side face of the upper base; and upper ends of the pull rods are driven by a motor to move up and down, such that the turning ring slides up and down between the outer sleeve and the inner sleeve along the pull rods to realize frequency tuning, and suitable for realizing high-frequency tuning in a small gap range, so that the availability and maintainability of the tuning ring are better.

US Pat. No. 10,390,418

BEAM ENERGY DISPERSION ADJUSTING MECHANISM FOR SUPERCONDUCTING PROTON CYCLOTRON

HEFEI CAS ION MEDICAL AND...

1. A beam energy dispersion adjusting mechanism for a superconducting proton cyclotron, comprising a vacuum cavity; whereinbases are symmetrically mounted on four sides of an outer wall of the vacuum cavity; an electric cylinder and a transmission mechanism are mounted on each of the four bases;
a jaws block and a position fixing plate are correspondingly provided on an inner wall of the vacuum cavity at each face;
the transmission mechanism comprises an oil-free sleeve, a moving connecting rod, a corrugated pipe and an electric cylinder connecting block;
both ends of the electric cylinder connecting block are respectively connected with the moving connecting rod and the electric cylinder through threads;
the position fixing plate is fixed onto the moving connecting rod; and
the jaws block is fixedly connected with the position fixing plate.

US Pat. No. 10,375,815

METHOD FOR ADJUSTING PARTICLE ORBIT ALIGNMENT BY USING FIRST HARMONIC IN CYCLOTRON

HEFEI CAS ION MEDICAL AND...

1. A method for adjusting particle orbit alignment using a first harmonic in a cyclotron, characterized by comprising the following steps:Step 1: providing eight identical coils in the vicinity of an extreme point of the magnetic field of the cyclotron, and covering the coils near the extreme point;
Step 2: dividing the eight coils into four pairs of coils, wherein a first pair of coils (9) includes a first coil (1) and a second coil (2) symmetrically disposed above and below; a second pair of coils (10) includes a third coil (3) and a fourth coil (4) symmetrically disposed above and below; a third pair of coils (11) includes a fifth coil (5) and a sixth coil (6) symmetrically disposed above and below; a fourth pair of coils (12) includes a seventh coil (7) and an eighth coil (8) symmetrically disposed above and below; and then the first pair of coils (9), the second pair of coils (10), the third pair of coils (11) and the fourth pair of coils (12) are divided into two groups; the first group of coils includes the first pair of coils (9) and the third pair of coils (11) that are symmetrically disposed; and the second group of coils includes the second pair of coils (10) and the fourth pair of coils (12) that are symmetrically disposed;
Step 3: setting the axes of the two pairs of coils of the same group at 180°;
Step 4: setting the axes of the first group of coils and the axis of the second group of coils at 70°-110° therebetween;
Step 5: connecting each coil to a DC power source external to the main unit of the accelerator via a current lead;
Step 6: applying currents with the same magnitude and same direction into the two coils in each pair of coils;
Step 7: applying currents with the same magnitude and opposite direction into two pairs of coils in the same group;
Step 8: after the currents are applied, the four coils in the first group of coils together generating a first independent harmonic (13), the four coils in the second group of coils together generating a second independent harmonic (14), and obtaining a first harmonic (15) according to a vector sum of the first independent harmonic (13) and the second independent harmonic (14),
Step 9: by using real-time feedback of beam detection of the cyclotron and according to the eccentricity of an equilibrium orbit of beam particles, performing real-time adjustment of the magnitude and direction of the currents applied to the coils by the DC power source; by changing the magnitude of the currents applied to the first group of coils and the second group of coils, changing the amplitude of the corresponding first independent harmonic (13) and the second independent harmonic (14); by changing the direction of the currents applied to the first group of coils and the second group of coils, changing the positive or negative direction of the phase of the corresponding first independent harmonic (13) and the second independent harmonic (14); and further changing the amplitude and phase of the first harmonic (15), that is, achieving alignment adjustment of the equilibrium orbit of the beam particles.