CN113075721B - Wide-range portable multifunctional electronic magnetic spectrometer - Google Patents
Wide-range portable multifunctional electronic magnetic spectrometer Download PDFInfo
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- CN113075721B CN113075721B CN202110324787.7A CN202110324787A CN113075721B CN 113075721 B CN113075721 B CN 113075721B CN 202110324787 A CN202110324787 A CN 202110324787A CN 113075721 B CN113075721 B CN 113075721B
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Abstract
The invention discloses a wide-range portable multifunctional electron magnetic spectrometer which comprises a magnet device and an electron recording device, wherein a magnetic field area generated by the magnet device has an aspect ratio of more than 5, and an electron beam measured by the magnetic spectrometer enters the magnetic field area in an incidence direction parallel to the length direction of the magnetic field area, so that the electron beam impacts on the electron recording device in an arc-shaped track with an angle of less than 180 degrees. When entering the uniform gap magnetic field, the electron to be measured adopts a mode that the electron to be measured is received by the detectors at two sides along a motion track lower than a semicircle, so that the transverse size of the uniform magnetic field can be obviously reduced, the spectrum measuring range is greatly improved, the integral transverse size is reduced, and the integral weight is reduced.
Description
Technical Field
The invention belongs to the field of high-energy electronic detection, and particularly relates to a wide-range portable multifunctional electronic magnetic spectrometer.
Background
The interaction of the super-strong laser and the substance generates a large amount of high-energy electrons, and the energy of the electrons ranges from non-relativistic to relativistic level and even reaches GeV level. The laser plasma state can be known more deeply by measuring the electron energy, and the method is widely applied to researches such as a strong current radiation source and particle acceleration.
For the measurement of electron energy spectrum, an electron magnetic spectrometer device is needed, namely, the spectrum measurement is carried out by electrons with different energies in a magnetic field with different deflection tracks. Conventional electron magnetometers typically have a detection area located at the deflection radius of the electrons, i.e., the electrons have to be received by a detector through a deflection semicircle in a magnetic field. Although the energy spectrum resolution of the semicircular electron magnetic spectrometer is good, the spectrum measurement range is limited, and the measurement of ultrahigh-energy electronic signals of hundreds of MeV and even GeV levels is difficult. For the electron magnetic spectrometer, if electrons with higher energy are measured, the magnetic induction intensity of a required magnetic field is multiplied, and the development difficulty is greatly improved. The corresponding volume and weight can be multiplied, the weight can reach hundreds of kilograms, the operation is very inconvenient, and the manufacturing cost is expensive. In addition, the size of the slot exposed out of one side of the detector is overlarge, the magnetic flux leakage rate is high, and the detector is very dangerous.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a wide-range portable multifunctional electronic magnetic spectrometer, and part of embodiments of the invention can simultaneously measure positive and negative electron energy spectrums, thereby greatly improving the measurement range of electrons.
In order to achieve the purpose, the invention adopts the following technical scheme:
a wide range portable multifunctional electron magnetic spectrometer, said spectrometer comprising magnet means and an electron recording means, said magnet means producing a magnetic field region having an aspect ratio greater than 5, said spectrometer measuring an electron beam impinging on said magnetic field region in a direction parallel to the length of said magnetic field region such that said electron beam impinges on said electron recording means in an arc trajectory having an angle less than 180 °.
Preferably, the aspect ratio is 12.5 and the electron energy measured by the magnetic spectrometer is in the range of 0.2MeV to 260 MeV.
Preferably, the magnetic spectrometer comprises two electron recording devices which are respectively arranged at two sides of the magnetic field area and respectively correspond to positive electrons and negative electrons.
Preferably, the magnetic spectrometer comprises a rectangular housing, the magnet device is disposed in the housing in the vertical direction, the front and rear ends of the housing are provided with an electron diversion port for incident electron beams and a through hole for inserting the electron recording device, and the housing is made of magnetic conductive material.
Preferably, the magnetic spectrometer comprises: the collimating hole device is arranged at the rear end of the shell and comprises a collimating hole arranged at the rear end of the shell and a collimating laser seat connected to the rear end of the shell.
Preferably, the electronic diversion port is made of tungsten steel.
Preferably, a shielding device is arranged in the housing, and the shielding device is sleeved at the tail of the electronic diversion port.
Preferably, the shielding means is made of lead.
Preferably, the electronic recording device comprises an electronic detector and an auxiliary support frame thereof.
Preferably, the auxiliary support frame is provided with a handle protruding outside the housing for easy extraction.
Compared with the prior art, the invention has the beneficial effects that: when the electrons to be measured enter the uniform gap magnetic field, the mode that the motion track of the electrons to be measured is received by the detectors at two sides is adopted, so that the transverse size of the uniform magnetic field can be obviously reduced, the spectrum measuring range is greatly improved, the integral transverse size is reduced, the integral weight is reduced, and the carrying and the operation are convenient; the electronic detectors are arranged on two sides of the electron incidence direction, and have the function of simultaneously measuring electron and positron signals by combining specific experimental conditions; the shell with a nearly full surrounding structure is adopted, so that the magnetic field of the space environment can be obviously purified, the magnetic leakage rate is reduced, and the safety is improved; the shielding device is arranged at the front end, so that high-energy electrons or X-rays of the electron source can be effectively prevented from directly irradiating the detector, and the signal-to-noise ratio of the detector is effectively improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a three-dimensional schematic view of the present invention with one side of the positive and negative electronic recording devices partially removed from the housing.
Fig. 2 is an exploded schematic view of fig. 1.
FIG. 3 is a sectional top view of the multifunctional electron magnetic spectrometer of the present invention and the electron trajectory in the gap magnetic field.
1-electron flow guide pipe, 2-front shell, 3-upper shell, 4-lower shell, 5-left shell, 6-right shell, 7-upper magnet, 8-lower magnet, 9-rear shell, 10-collimation hole device, 11-electron detector auxiliary support frame, 12-positron detector auxiliary support frame, 13-shielding device, 14-positron detector, 15-electron detector and 16-electron beam.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art based on the embodiments of the present invention without inventive step, are within the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
As shown in fig. 1-3, the present embodiment provides a wide-range portable multifunctional electronic magnetic spectrometer, which includes a magnet device, a housing, a shielding device, an electron flow guide tube, positive and negative electron recording devices, and a collimation hole device.
The magnetic device is composed of an upper plane magnetic steel and a lower plane magnetic steel which are arranged in parallel, a uniform gap magnetic field with the size of 250mm (length) multiplied by 20mm (width) multiplied by 10mm (height) is formed in the middle, the length-width ratio reaches 12.5:1, and the magnetic induction intensity of the embodiment is 0.3T, and the electronic spectrum measuring range reaches 0.2MeV-260MeV, so that the measurement of positive and negative electronic signals with higher energy is very convenient. The electronic magnetic spectrometer can meet the requirement of greatly improving the spectrum measuring range by properly increasing the length of the magnetic steel and the magnetic induction intensity, and the overall appearance size and weight are not greatly increased.
The casing is nearly full surrounding structure magnetic material, and this embodiment appearance size 330mm (length) x 74mm (width) x 54mm (height), only leave less electron water conservancy diversion mouth, positive negative electron recorder slot and collimation hole around the front and back terminal surface, can shield most electron magnetic spectrometer surrounding space magnetic field, and the magnetic leakage rate is lower, has improved the security.
The shielding device is a rectangular lead block, lead is an ideal material for shielding stray signals, high-energy electrons and X-ray direct-passing signals emitted by most electron sources can be blocked, the thickness can be determined according to specific experimental conditions, and the thickness of the shielding lead in the embodiment is about 5 mm. Because lead is harmful to human bodies, shielding lead is inlaid in the inner wall of the front end of the shell and is not in contact with the human bodies, and safety is guaranteed.
The electron honeycomb duct is magnetic conductivity material, can shield the magnetic field in the honeycomb duct, makes incident electron get into uniform gap magnetic field smoothly, this embodiment the electron honeycomb duct material is tungsten steel, belongs to high Z material (high atomic number material), and the body can effectively shield the direct-through stray signal, internal diameter 1 mm.
The positive and negative electronic recording device comprises positive and negative electronic detectors and an auxiliary supporting frame, the positive and negative electronic detectors are inserted through a slot at the rear end of the shell and are respectively arranged on two sides of an electronic incidence direction, the detectors are arranged in the uniform magnetic field area, and the detectors on the two sides can simultaneously measure positive and negative electronic signals. The positive and negative electron detector of this embodiment is the IP imaging board, and the horizontal skew electron incident direction is about 10mm, and supplementary support frame material is non-magnetic aluminum, can not destroy the structure of inside magnetic field, and the outer end is furnished with the handle of conveniently extracting. And scanning and reading positive and negative electronic signals recorded by the IP imaging plate through a phosphorus screen analyzer.
Collimation hole device comprises collimation hole and collimation laser seat, and this embodiment collimation aperture 3mm, 11mm of collimation laser seat internal diameter can fix the external diameter and be 11 mm's laser pen, collimation hole device perforates through the laser pen in advance and debugs, and available collimation laser pen aims electron source at any time during the experiment, and is very convenient.
Although the present invention has been described in detail with respect to the above embodiments, it will be understood by those skilled in the art that modifications or improvements based on the disclosure of the present invention may be made without departing from the spirit and scope of the invention, and that such modifications and improvements are within the spirit and scope of the invention.
Claims (4)
1. A wide-range portable multifunctional electron magnetic spectrometer, characterized in that the spectrometer comprises a magnet device and an electron recording device, the magnet device generates a magnetic field area with an aspect ratio larger than 5, the spectrometer measures an electron beam entering the magnetic field area with an incidence direction parallel to the length direction of the magnetic field area, so that the electron beam impinges on the electron recording device with an arc-shaped trajectory with an angle smaller than 180 °; the aspect ratio is 12.5, and the electron energy measured by the magnetic spectrometer is in a range of 0.2MeV-260 MeV;
the magnetic spectrometer comprises two electron recording devices which are arranged on two sides of the magnetic field area in a dividing way and respectively correspond to positive and negative electrons;
the magnetic spectrometer comprises a rectangular shell, the magnet device is arranged in the shell in the vertical direction, the front end and the rear end of the shell are provided with an electron diversion port for incidence of electron beams and a through hole for inserting the electron recording device, and the shell is made of magnetic conductive materials; the electronic recording device comprises an electronic detector and an auxiliary supporting frame thereof, and the electronic detector and the auxiliary supporting frame are inserted through a slot opening at the rear end of the shell and are respectively arranged on two sides of the electronic incidence direction;
a shielding device is arranged in the shell and sleeved at the tail part of the electronic diversion port;
the magnetic spectrometer comprises: the collimating hole device is arranged at the rear end of the shell and comprises a collimating hole arranged at the rear end of the shell and a collimating laser seat connected to the rear end of the shell.
2. The wide range portable multifunctional electron magnetic spectrometer of claim 1, wherein the electron flow guide port is made of tungsten steel.
3. The wide range portable multifunction electron magnetic spectrometer of claim 1, wherein the shielding means is made of lead.
4. A wide range portable multifunction electronic magnetic spectrometer according to claim 1, characterised in that said auxiliary support is provided with a handle protruding outside said housing facilitating extraction.
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| CN202110324787.7A CN113075721B (en) | 2021-03-26 | 2021-03-26 | Wide-range portable multifunctional electronic magnetic spectrometer |
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| CN113075721B true CN113075721B (en) | 2022-09-30 |
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| CN114137598B (en) * | 2021-11-05 | 2022-06-07 | 北京大学 | Positive and negative electron magnetic spectrometer |
Citations (5)
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| WO2008147247A2 (en) * | 2007-01-30 | 2008-12-04 | Irina Nikolaevna Shabanova | Electronic magnetic spectrometer |
| CN105425277A (en) * | 2016-01-15 | 2016-03-23 | 中国工程物理研究院激光聚变研究中心 | Positron-electron magnetic spectrometer with angular resolution capability |
| CN207689677U (en) * | 2018-01-10 | 2018-08-03 | 中国矿业大学(北京) | A kind of electron-positron pair magnetic spectrograph |
| CN108398712A (en) * | 2018-02-08 | 2018-08-14 | 中国工程物理研究院上海激光等离子体研究所 | Circular cone item crystalline substance spectrometer and its installation and adjustment method |
| CN211014659U (en) * | 2019-10-08 | 2020-07-14 | 中国工程物理研究院激光聚变研究中心 | Charged particle spectrometer with wide energy spectrum range |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9485847B1 (en) * | 2013-03-14 | 2016-11-01 | Nutech Ventures | Method of aligning a laser-based radiation source |
| CN105301025B (en) * | 2015-10-26 | 2017-11-14 | 中国工程物理研究院上海激光等离子体研究所 | A kind of multiband crystal spectrometer and its adjusting method |
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| WO2008147247A2 (en) * | 2007-01-30 | 2008-12-04 | Irina Nikolaevna Shabanova | Electronic magnetic spectrometer |
| CN105425277A (en) * | 2016-01-15 | 2016-03-23 | 中国工程物理研究院激光聚变研究中心 | Positron-electron magnetic spectrometer with angular resolution capability |
| CN207689677U (en) * | 2018-01-10 | 2018-08-03 | 中国矿业大学(北京) | A kind of electron-positron pair magnetic spectrograph |
| CN108398712A (en) * | 2018-02-08 | 2018-08-14 | 中国工程物理研究院上海激光等离子体研究所 | Circular cone item crystalline substance spectrometer and its installation and adjustment method |
| CN211014659U (en) * | 2019-10-08 | 2020-07-14 | 中国工程物理研究院激光聚变研究中心 | Charged particle spectrometer with wide energy spectrum range |
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