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System and method for measuring beam flow intensity of particle accelerator

A particle accelerator and current intensity technology, which is applied in the field of accelerator physical beam diagnosis, can solve the problems of sensitivity to temperature difference changes and large attenuation in tunnels, and achieve the effect of improving measurement accuracy

Active Publication Date: 2016-06-15
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI +1
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Problems solved by technology

[0008] The purpose of the present invention is to provide an improved system and method for measuring the beam current intensity of a particle accelerator using a common-mode TM010 signal, so as to solve the large attenuation caused by the long-distance transmission of the common-mode TM010 signal outside the tunnel in the prior art And the problem of being sensitive to the temperature difference inside and outside the tunnel, so as to improve the measurement accuracy

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  • System and method for measuring beam flow intensity of particle accelerator

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Embodiment Construction

[0029] The preferred embodiments of the present invention will be given below in conjunction with the drawings and described in detail.

[0030] Such as figure 1 As shown, the present invention, a system for measuring the beam current intensity of a particle accelerator, includes a dual-cavity BPM1 and an ICT2 arranged on the particle accelerator channel 10, and also includes a pair of differentiators 31 and 32 for signal processing. A mixer 4, a low-pass filter 5, and a data collector 6. Among them, the mixer 4, the low-pass filter 5, and the data collector 6 are serially connected in sequence, and a pair of differentiators 31 and 32 are connected in parallel between the dual-cavity BPM1 and the mixer 4.

[0031] In the present invention, the dual-cavity BPM1 refers to a beam position detector with a reference cavity added to the typical cavity BPM, figure 2 with image 3 The schematic diagrams of the typical cavity BPM and the dual cavity BPM are shown respectively, and the dire...

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Abstract

The invention provides a system for measuring the beam flow intensity of a particle accelerator. The system comprises a dual-chamber chamber-type BPM and an ICT both arranged on a particle accelerator. The BPM comprises two reference chambers, each of which comprises a pair of probes on two sides respectively. The system also comprises a pair of differentiators, a mixer, a low-pass filter and a data collector. The mixer, the low pass filter and the data collector are connected in series successively. The pair of differentiators are connected between the BPM and the mixer parallelly. The system overcomes the defect in the prior art that a common mode TM010 signal must be transmitted for a long distance to the outside of a tunnel for mixing with a downconverted local oscillator source so that the signal is attenuated and is sensitive to the indoor and outdoor temperature difference, so that the measurement precision is improved.

Description

Technical field [0001] The invention relates to the field of accelerator physical beam current diagnosis, in particular to a system and method for measuring the beam current intensity in a particle accelerator. Background technique [0002] At present, ICT (integrated current transformer) has been widely used in particle accelerators to measure beam current intensity ("beam current intensity" in this application refers to the amplitude of beam current intensity). However, because the measurement waveform of ICT is greatly interfered by the ground loop, if ICT is used for a single measurement, the random error is large and cannot meet the requirements of measurement accuracy; but if ICT is used for multiple measurements, the average value obtained is accurate , Can be used for flow intensity calibration. [0003] Cavity BPM (Beam Position Detector) is an existing signal acquisition method. Because of its nm-level position resolution, it is widely used in particle accelerators for p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/29
CPCG01T1/29
Inventor 冷用斌赖龙伟阎映炳袁任贤
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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