Method and system for measuring beam deflection angle
A measurement method and beam current technology, applied in the direction of measuring devices, instruments, electrical components, etc.
Inactive Publication Date: 2011-12-14
INST OF FLUID PHYSICS CHINA ACAD OF ENG PHYSICS
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Problems solved by technology
No existing technology is capable of direct measurement of beam deflection angle
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[0015] figure 1 It is a schematic diagram of the beam deflection angle in the present invention. from figure 1 It can be seen from the figure that the angle between the direction of beam movement and the axis of the circular beam pipe is included.
[0016] figure 2 It is a schematic structural diagram of a system for measuring the beam deflection angle by the axial B-dot in the present invention. from figure 2 It can be seen from the figure 2 The circular beam pipe 1 is connected to one end of the axial B-dot 2, the other end of the axial B-dot is connected to the self-integrating resistor 3, and then connected to the voltage signal amplification circuit 4. If the signal amplitude is relatively large, it is already suitable For measurement, the voltage signal amplifying circuit is not needed. Finally, the output signal of the voltage signal amplifying circuit 4 is connected to the voltage signal measuring instrument 6 through the connecting cable 5, and the signal meas...
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The invention provides a method and system for measuring the beam deflection angle. The method of the invention adopts the axial B-dot induction coil placed perpendicular to the pipeline axis to obtain the voltage signal waveform on the axial B-dot, and uses a circuit to perform signal Integrate or directly digitally integrate the B-dot voltage signal to obtain the integral waveform. Under certain conditions, the integral waveform is proportional to the beam current intensity waveform and beam deflection angle; combined with the integral circuit parameters, beam pipe size and axial B -dot size, the scaling factor of the product of the integral waveform, the beam deflection angle and the beam intensity waveform is obtained through formula calculation; the beam deflection angle waveform is obtained by dividing the integral waveform by the beam intensity waveform and the scaling factor. By adopting the present invention, the beam current direction can be directly measured without obstruction with a relatively small beam transmission line length, thereby more accurately correcting the beam current trajectory, and more accurately reflecting the change of the beam current trajectory. The invention is suitable for beam diagnosis of charged particle accelerators.
Description
technical field [0001] The invention belongs to the field of beam current diagnosis of charged particle accelerators, and provides a direct and unobstructed beam deflection angle measurement method and system. Background technique [0002] Beam position measurement is one of the most important beam diagnostic methods in charged particle accelerators. In fact, to fully describe the position of the beam centroid in the transverse phase space, it is also necessary to measure the beam deflection angle. The so-called beam deflection angle refers to the angle between the beam moving direction and the axis of the circular beam pipe when the charged beam is transmitted in the pipe. The beam deflection angle is actually a two-dimensional parameter, which is described by two directions, horizontal and vertical, according to the usual practice, and is denoted as x direction and y direction. The beam deflection angle measurement can provide very important diagnostic information for ...
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IPC IPC(8): H05H7/00G01B7/30
Inventor 何小中李勤
Owner INST OF FLUID PHYSICS CHINA ACAD OF ENG PHYSICS