Faraday detector for sub-nanosecond frontier pulsed electron beam measurements
A pulsed electron beam and detector technology, applied in the field of Faraday detectors, can solve the problems of limited measurement range of detection equipment, and achieve the effects of widening the measurement range, high sublimation temperature, and strong conductivity
Active Publication Date: 2018-02-09
NORTHWEST INST OF NUCLEAR TECH
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Problems solved by technology
[0003] The purpose of the present invention is to provide a Faraday detector suitable for sub-nanosecond frontier pulsed electron beam measurement, which solves the technical problem of limited measurement range of existing detection equipment
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[0018] see figure 1 , the detector in the preferred embodiment of the present invention has an axisymmetric structure as a whole. The grounded shell 8 is a cylindrical structure with two ends open, one end is connected to the electron beam source 9 , and the other end is installed with the collimator 1 . The collimator 1 is made of metallic copper material, with an outer diameter of 50mm, and is installed on the inner wall of one end of the grounded casing 8, and its function is to ensure that the entire detector is parallel to the equipment. The end of the collimator 1 facing the outside is provided with a vacuum cable holder 7, which transmits the beam current signal to the oscilloscope by connecting the coaxial cable, and its other function is to ensure that the Faraday detector is isolated from the outside atmosphere, so that the Faraday detector is in a vacuum environment . One end of the pin of the sampling resistor 2 is welded on the inner end of the collimator 1 . T...
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The invention relates to a pulsed electron beam measurement device, in particular to a Faraday detector suitable for sub-nanosecond frontier pulsed electron beam measurement, including a grounded shell, a collimator, a sampling resistor, a metal bracket and a charge collector; The grounded shell is a cylindrical structure with openings at both ends, one end is connected to the electron beam source, and the other end is installed with a collimator; The other end is connected to one end of the sampling resistor; the other end of the sampling resistor is connected to a metal support; a charge collector perpendicular to the incident direction of the electron beam is nested in the center of the metal support. The Faraday detector provided by the present invention has the advantages of compact overall structure, uniform resistance distribution, low loop inductance, and low noise, which can meet the measurement of sub-nanosecond frontier pulsed electron beams, and broaden the measurement range of the Faraday detector.
Description
technical field [0001] The invention relates to a pulsed electron beam measuring device, in particular to a Faraday detector suitable for subnanosecond frontier pulsed electron beam measurement. Background technique [0002] The Faraday detector is a charged particle measurement device with simple structure, and it is a common measurement device in the electron beam diagnosis system produced by the accelerator. When the charged particles are irradiated on the Faraday detector and are accepted by the charge collector, an excitation current is generated, and the current flows through the sampling resistor to form a loop. The intensity of the excitation current can be calculated by measuring the voltage drop generated on the resistor, and then the charged particle is obtained. strength. Faraday detectors based on this measurement principle are often used in plasma physics and beam physics, and various structures and forms have appeared according to different measurement object...
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IPC IPC(8): G01T1/29
Inventor 苏兆锋来定国宋玮谭维兵苏建仓
Owner NORTHWEST INST OF NUCLEAR TECH