CN106950191B - Mating test sample generates the experimental system of spectral characteristic under electronics note excitation - Google Patents
Mating test sample generates the experimental system of spectral characteristic under electronics note excitation Download PDFInfo
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- CN106950191B CN106950191B CN201710110708.6A CN201710110708A CN106950191B CN 106950191 B CN106950191 B CN 106950191B CN 201710110708 A CN201710110708 A CN 201710110708A CN 106950191 B CN106950191 B CN 106950191B
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- 230000005284 excitation Effects 0.000 title claims abstract description 18
- 230000003595 spectral effect Effects 0.000 title claims abstract description 14
- 230000013011 mating Effects 0.000 title claims abstract description 7
- 238000012360 testing method Methods 0.000 title claims abstract description 7
- 238000001328 terahertz time-domain spectroscopy Methods 0.000 claims abstract description 15
- 239000000523 sample Substances 0.000 claims description 35
- 239000000919 ceramic Substances 0.000 claims description 11
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 9
- 229910052750 molybdenum Inorganic materials 0.000 claims description 9
- 239000011733 molybdenum Substances 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 4
- 230000001133 acceleration Effects 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- WMTSAHAFZXEJBV-UHFFFAOYSA-N [Ba].[W] Chemical compound [Ba].[W] WMTSAHAFZXEJBV-UHFFFAOYSA-N 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 238000005259 measurement Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 7
- 239000003574 free electron Substances 0.000 abstract description 6
- 230000005855 radiation Effects 0.000 abstract description 6
- 238000002474 experimental method Methods 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 2
- 238000011897 real-time detection Methods 0.000 abstract description 2
- 238000010223 real-time analysis Methods 0.000 abstract 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 229910021389 graphene Inorganic materials 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000011160 research Methods 0.000 description 3
- 238000004611 spectroscopical analysis Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000985 reflectance spectrum Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3581—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using far infrared light; using Terahertz radiation
- G01N21/3586—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using far infrared light; using Terahertz radiation by Terahertz time domain spectroscopy [THz-TDS]
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- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Abstract
The invention discloses a kind of experimental systems of mating test sample generation spectral characteristic under electronics note excitation, belong to terahertz emission spectral characteristic detection field.The system includes: vacuum chamber, pumped vacuum systems, pivoting lever and electron gun；Pumped vacuum systems infuses excitation sample for free electron and provides the experimental situation of high vacuum；Pivoting lever, which can not only fix electron gun, can also control the angles and positions of electronics note excitation sample；A pair of of observation window that vacuum chamber is installed above and below, which can be convenient, to be realized terahertz time-domain spectroscopy analyzer the radiation field that generates under electronics note excitation carries out real-time detection and analysis to sample, and a pair of of observation window of forward and backward installation can be convenient experiment operator and observe situation inside vacuum chamber in real time.Rationally, cooperation terahertz time-domain spectroscopy analyzer uses for whole system design of the present invention, can be convenient the detection realized and generate terahertz emission spectral characteristic under free electron note excitation to sample.
Description
Technical field
The invention belongs to terahertz emission spectral characteristic detection technique fields, and in particular to when a kind of mating utilization Terahertz
Domain spectroanalysis instrument detection sample under free electron note excitation generates the experimental system of the spectral characteristic of terahertz emission.
Technical background
THz wave (THz) refers to electromagnetic wave of the frequency between 0.1THz to 10THz, and THz wave is between microwave and infrared
Between wave.THz wave has many unique properties, has in fields such as safety detection, imaging, biomedicine, wireless communications
Important application.Since the frequency of Terahertz is very high, so its spatial resolution is also very high；Again due to the very short (skin of its pulse
Second-time), so having very high temporal resolution.THz imaging technology and THz wave spectral technology thus constitute terahertz
The two chief technologies hereby applied.Simultaneously as Terahertz energy very little, will not generate destruction to substance, so
It is more advantageous compared with X-ray.In addition, since the vibration of large biological molecule and the resonant frequency of rotational frequency are in Terahertz
Wave band, therefore Terahertz is chosen seeds in grain, the agricultural such as good breeding and food-processing industry have good application prospect.Terahertz
Still in continuous research, the scientific prospect of the length and breadth of land is recognized the world over for application hereby.
Terahertz time-domain spectroscopy analyzer is a kind of coherent detection technology equipment, can obtain the vibration of terahertz pulse simultaneously
Width information and phase information can directly obtain the absorption coefficient and refractive index of sample by carrying out Fourier transformation to time waveform
Equal optical parameters.Graphene electron mobility is high, has weight in Terahertz the science and technology especially research of THz radiation source
It applies.Electronics note excitation graphene sample, the chemical property of graphene can change, and the variation of its chemical property
It can be characterized by the variation of refractive index and conductivity.Graphene radiation is composed using terahertz time-domain spectroscopy analyzer and is carried out
Analysis, can be obtained graphene conductivity and variations in refractive index situation, this has the research in graphene terahertz emission source
Important meaning.But existing terahertz time-domain spectroscopy analyzer platform cannot infuse excitation graphene sample for electronics and provide Gao Zhen
Empty experimental situation.So invention designs suitable corollary system, so that the set system and the analysis of existing terahertz time-domain spectroscopy
Instrument co-ordination facilitates the spectral characteristic of test sample, and there is urgent reality to need.
Summary of the invention
The present invention devises corresponding experiments supporting system according to existing terahertz time-domain spectroscopy analyzer, the system and
Terahertz time-domain spectroscopy analyzer is used cooperatively, and can conveniently be detected in the case where free electron infuses excitation, transmission caused by sample
The time-domain spectroscopies characteristic such as spectrum or reflectance spectrum.
The technical solution adopted by the present invention is that:
A kind of mating test sample generates the experimental system of spectral characteristic under electronics note excitation, comprising: vacuum chamber, pumping
Vacuum system, pivoting lever and electron gun；
The pumped vacuum systems is for providing vacuum chamber high vacuum environment；
The vacuum chamber be equipped with observation window and chamber door, inside be additionally provided with sample stage；It is set in the chamber door
It is equipped with the twin-core electrode of electron rifle power supply；
The pivoting lever passes through chamber door and is divided into inside and outside two parts, and electron gun is solid by half part in pivoting lever
Above sample stage, the pivoting lever outer half portion of rotating drum outside is the angle of changeable electron gun launching electronics note
Degree；
The pumped vacuum systems includes the mechanical pump of a pumping system low vacuum, and one is taken out the molecular pump of system high vacuum,
And the control platform worked normally for controlling mechanical pump and molecular pump.
The observation window is to be respectively arranged at four observation windows that vacuum chamber is upper and lower, forward and backward, outside upper and lower observation window
Terahertz time-domain spectroscopy analyzer probe is approached, for detecting and analyzing signal.
It is additionally provided with six core electrodes in the chamber door, can be used for additional power source and modulation voltage is applied to sample,
It can be combined with Faraday cup measurement electronics note line size.
The electron gun is the electron gun specially designed for reality empty real check system, and electron gun, which specifically includes that, is coated with ceramics
Conducting wire, cathode terminal, electron gun top crown, metallic support rod, molybdenum cylinder, ceramics pole, cathode and aperture anode plate.In molybdenum cylinder
Portion is provided with cathode and is fixed on the electron gun top crown back side, and the aperture anode plate is connected by ceramics pole with top crown, and
The center in position of opening and emission of cathode face is located on same axis；
The electron gun top crown and aperture anode plate are oxygenless copper material, and cathode selects barium-tungsten dispense cathode, uses Laser Welding
Cathode is fixedly welded on inside molybdenum cylinder by connection technology, and molybdenum cylinder is fixed by screws in below electron gun top crown.Two of cathode
The conducting wire for being coated with ceramics is respectively welded on binding post, the other end of two conducting wires is connected respectively to two metals of twin-core electrode
On electrode, additional modulation power source can heat cathode by twin-core electrode and provide acceleration voltage, to realize electronics
Rifle launching electronics.
The invention adopts the above technical scheme, which can achieve the effect that, is: being vacuumized using mechanical pump, molecular pump two-stage and is
System can infuse excitation sample for free electron and provide high vacuum (10-4Pa experimental situation)；Pivoting lever can not only be fixed
Electron gun can also control the angles and positions of electronics note excitation sample；A pair of of observation window that vacuum chamber is installed above and below can be with
The radiation field for facilitating realization terahertz time-domain spectroscopy analyzer to generate sample under electronics note excitation carries out real-time detection and divides
Analysis, a pair of of observation window of forward and backward installation can be convenient experiment operator and observe situation inside vacuum chamber in real time.The present invention
Rationally, cooperation terahertz time-domain spectroscopy analyzer uses for whole system design, can be convenient realization and infuses to sample in free electron
The lower detection for generating terahertz emission spectral characteristic of excitation.
Detailed description of the invention
Fig. 1 is system structure diagram of the invention；
Fig. 2 is vacuum chamber partial top structural schematic diagram of the invention；
Fig. 3 is vacuum chamber chamber door side structure schematic view of the invention；
Fig. 4 is vacuum chamber chamber door schematic view of the front view of the invention；
Fig. 5 is vacuum chamber chamber door overlooking structure diagram of the invention.
In figure: 1, mechanical pump；2, molecular pump；3, control platform；4, vacuum chamber；5, observation window；6, chamber door；7, twin-core
Electrode；8, electron gun pivoting lever；9, six core electrode；10, modulation power source；11, terahertz time-domain spectroscopy analyzer signal connects
Receive probe；12, electron gun；13, sample stage.Wherein, twin-core electrode 7 includes: 7-1, edge of a knife flange, 7-2, porcelain bushing, 7-3,
Metal electrode；Electron gun pivoting lever 8 includes: 8-1, pivoting lever outer half portion, half portion in 8-2, pivoting lever
Point；Electron gun 12 include: 12-1, be coated with ceramics conducting wire, 12-2, cathode terminal, 12-3, electron gun top crown, 12-4,
Metallic support rod, 12-5, molybdenum cylinder, 12-6, ceramics pole, 12-7, cathode, 12-8, aperture anode plate.
Specific embodiment
In order to further appreciate that invention, features and effects of the invention, with reference to the accompanying drawings and examples to this hair
It is bright to be described in further detail:
As Figure 1-Figure 5, apparatus of the present invention include mechanical pump 1,3 and of molecular pump 2, molecular pump and mechanical pump control platform
Vacuum chamber 4 is provided with chamber exhaust hole, the up and down each observation window 5 in front and back and chamber door 6, the chamber on the vacuum chamber 4
Room door 6 is switched by slideway, and outside is provided with twin-core electrode 7, electron gun pivoting lever outer half portion 8-1 and six core electrodes
9, inside is provided with the interior half part 8-2 of sample stage 13 and electron gun pivoting lever.Its shell of vacuum chamber 4 is metal knot
Structure, the metal structure can bear high vacuum environment.
Principle schematic diagram of the present invention shown in referring to Fig.1 puts up entire experimental system, and vacuum chamber 4 is fixed to terahertz
Hereby on time domain spectroscopy instrument platform, terahertz time-domain spectroscopy two probe receivers 11 of analysis are approached into vacuum chamber respectively
Two observation windows 5 up and down of room 4.
It is 6 main view of chamber door and overlooking structure diagram referring to Fig. 4 and Fig. 5, sample is fixed on sample stage 13, leads to
It crosses fixed metallic support rod 12-4 and electron gun 12 is installed to half part 8-2 in electron gun pivoting lever, two yin of electron gun
Pole binding post 12-2 is connected respectively to two of twin-core electrode 7 by being coated with the conducting wire 12-1 of ceramics and penetrates into chamber interior
On metal electrode 7-3,7 outer end of twin-core electrode is wired on modulation power source 10, can be yin by modulation power source 10
Pole 12-7 is heated and and is provided the high pressure for accelerating electronics, realization electron emission.
After the completion of the above preparation, start to start this set experimental system, open mechanical pump 1, whole system is taken out low true
Sky opens molecular pump 2, to whole system pumping high vacuum when vacuum degree reaches 10Pa or so.
When vacuum degree meets requirement of experiment (10-4Pa), modulation power source 10 is opened, the cathode 12-7 to electron gun 12 is started
It is heated, when cathode 12-7 temperature meets launch requirements, negative high voltage is added to cathode 12-7, makes 12 launching electronics of electron gun, led to
It overregulates cathode 12-7 institute's making alive and acceleration high pressure size can control the size of 12 emission current of electron gun.
Rotating electron rifle pivoting lever outer half portion 8-1, control electronics infuse the angles and positions being applied on sample, angle
Spending adjustable range is about ± 80 degree.
Electronics note acts on sample, and sample electrology characteristic can change and outside radiated electromagnetic wave, the electromagnetic wave of generation
Radiation can be received by approaching two terahertz time-domain spectroscopy analyzer probe receivers 11 of upper and lower two observation windows 5
Arrive, by spectroanalysis instrument can further complete pair signals time-domain spectroscopy analysis.Six core electrodes are additionally provided in chamber door 6,
Additional power source can apply certain voltage by the electrode for sample, infuse after making alive with electronics it is possible thereby to analyze sample
Act on the radiation spectral property generated.In addition, electricity can also be measured using six core electrode and with the use of devices such as Faraday cups
The line size that sub- rifle 12 is emitted.
Vacuum chamber 4 is also provided with former and later two observation windows 5, can be convenient observation vacuum chamber 4 by the two windows
Inner case, convenient for control electron gun 12 be applied to position and angle on sample.
Claims (2)
1. the experimental system that a kind of mating test sample generates spectral characteristic under electronics note excitation, comprising: vacuum chamber is taken out very
Empty set system, pivoting lever and electron gun；
The pumped vacuum systems is for providing vacuum chamber high vacuum environment；
The vacuum chamber be equipped with observation window and chamber door, inside be additionally provided with sample stage；It is provided in the chamber door
The twin-core electrode of electron rifle power supply；
The pivoting lever passes through chamber door and is divided into inside and outside two parts, and electron gun is fixed on by half part in pivoting lever
Above sample stage, the pivoting lever outer half portion of rotating drum outside is the angle of changeable electron gun launching electronics note；
The pumped vacuum systems includes the mechanical pump of a pumping system low vacuum, and one is taken out the molecular pump of system high vacuum, and
The control platform worked normally for controlling mechanical pump and molecular pump；
The observation window is to be respectively arranged at four observation windows that vacuum chamber is upper and lower, forward and backward, is approached outside upper and lower observation window
There is terahertz time-domain spectroscopy analyzer probe, for detecting and analyzing signal；
It is additionally provided with six core electrodes in the chamber door, modulation voltage, and combined techniques are applied to sample for additional power source
Draw the measurement electronics note line size.
2. a kind of mating test sample as described in claim 1 generates the experimental system of spectral characteristic under electronics note excitation,
It is characterized by: the electron gun include: be coated with ceramics conducting wire, cathode terminal, electron gun top crown, metallic support rod,
Molybdenum cylinder, ceramics pole, cathode and aperture anode plate；Molybdenum cylinder is internally provided with cathode and is fixed on the electron gun top crown back side, described
Aperture anode plate is connected by ceramics pole with top crown, and the center in position of opening and emission of cathode face is located on same axis；
The electron gun top crown and aperture anode plate are oxygenless copper material, and cathode is the barium-tungsten dispense cathode being fixed on inside molybdenum cylinder,
Molybdenum cylinder is fixed below electron gun top crown；It is respectively welded on two cathode terminals of cathode top setting and is coated with ceramics
Conducting wire, the other end of two conducting wires are connected respectively on two metal electrodes of twin-core electrode, and additional modulation power source passes through twin-core
Electrode can heat cathode and provide acceleration voltage, to realize electron gun launching electronics.
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| CN201710110708.6A CN106950191B (en) | 2017-02-28 | 2017-02-28 | Mating test sample generates the experimental system of spectral characteristic under electronics note excitation |
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| CN201710110708.6A CN106950191B (en) | 2017-02-28 | 2017-02-28 | Mating test sample generates the experimental system of spectral characteristic under electronics note excitation |
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| CN108007488B (en) * | 2017-11-29 | 2020-04-28 | 赫立科技（成都）有限公司 | Position adjusting device used in vacuum chamber |
| CN109580753B (en) * | 2018-10-10 | 2023-08-01 | 金华职业技术学院 | Electrochemical-combined spectrum measurement method |
| CN109870423A (en) * | 2019-03-07 | 2019-06-11 | 中国科学技术大学 | Terahertz time-domain spectroscopy measuring system and method |
| CN110711070B (en) * | 2019-09-25 | 2022-08-02 | 张小伏 | Preparation method of far infrared graphene condom |
| CN113488831B (en) * | 2021-07-09 | 2022-07-01 | 电子科技大学 | Terahertz gas laser of electron beam pumping |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3878392A (en) * | 1973-12-17 | 1975-04-15 | Etec Corp | Specimen analysis with ion and electrom beams |
| CN1412543A (en) * | 2001-10-18 | 2003-04-23 | 浙江大学 | Optical parameter measurement device of fluorescent powder for vacuum UV |
| CN201893313U (en) * | 2010-09-21 | 2011-07-06 | 安徽华东光电技术研究所 | Positive pole control electron gun applied in millimeter-wave travelling wave tube |
| CN202710465U (en) * | 2012-07-05 | 2013-01-30 | 中国科学院物理研究所 | Nano graphical system and photoresponse characteristic detecting device of nano graphical system |
-
2017
- 2017-02-28 CN CN201710110708.6A patent/CN106950191B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3878392A (en) * | 1973-12-17 | 1975-04-15 | Etec Corp | Specimen analysis with ion and electrom beams |
| CN1412543A (en) * | 2001-10-18 | 2003-04-23 | 浙江大学 | Optical parameter measurement device of fluorescent powder for vacuum UV |
| CN201893313U (en) * | 2010-09-21 | 2011-07-06 | 安徽华东光电技术研究所 | Positive pole control electron gun applied in millimeter-wave travelling wave tube |
| CN202710465U (en) * | 2012-07-05 | 2013-01-30 | 中国科学院物理研究所 | Nano graphical system and photoresponse characteristic detecting device of nano graphical system |
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