CN103033282B - Method detecting instant temperature of graphite tile of partial filter of magnetic confinement fusion device - Google Patents
Method detecting instant temperature of graphite tile of partial filter of magnetic confinement fusion device Download PDFInfo
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- CN103033282B CN103033282B CN201210420395.1A CN201210420395A CN103033282B CN 103033282 B CN103033282 B CN 103033282B CN 201210420395 A CN201210420395 A CN 201210420395A CN 103033282 B CN103033282 B CN 103033282B
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Abstract
The invention relates to the field of nuclear fusion and optical diagnosis and discloses a method for detecting instant temperature of a graphite tile of a partial filter of a magnetic confinement fusion device. The technical schemes includes that when the magnetic confinement fusion device works normally, terahertz waves are perpendicularly injected into the graphite tile from a position outside a window, and a probe is used for measuring and recording a terahertz time-domain spectrum Omega<T>(t) reflected by the graphite tile under working temperature. The time-domain spectrum is analyzed and processed and transformed in Fourier transformation in an effective frequency domain to obtain a frequency domain spectrum F<T>(omega) under the working temperature. At the moment, data automatically selects a characteristic spectral line, reads positions of the characteristic spectral line in a data base under calibrated temperature, frequency shift amount is obtained by comparing the two positions, a functional relationship of frequency shift amount - temperature of the data base is compared with the frequency shift amount, and the instant temperature is then calculated, outputted and led to a computer system to be stored. According to the method for detecting the instant temperature of the graphite tile of the partial filter of the magnetic confinement fusion device, technology of reflecting the terahertz time-domain spectrum is adopted, the thermal shock instant temperature of the graphite tile of the partial filter of the magnetic confinement fusion device can be detected online, synchronously, and without contact or damage.
Description
Technical field
The present invention relates to nuclear fusion and optical diagnostics field, be particularly related to a kind of method that detects magnetic trapped fusion apparatus divertor graphite tile transient temperature, the method is compared than traditional thermocouple thermometer, can fast, synchronously return to temperature data and contactless not damaged.
Background technology
Terahertz (Terahertz or THz) ripple is commonly referred to as frequency and is in the electromagnetic wave between 0.1THz ~ 10THz, between microwave and infrared between.Terahertz time-domain spectroscopy system is a kind of coherent detection technology, can obtain amplitude information and the phase information of terahertz pulse simultaneously, by time waveform being carried out to Fourier transform, can directly obtain the optical parametrics such as the absorption coefficient of sample and refractive index.Terahertz time-domain spectroscopic technology is because have very high detection signal to noise ratio (S/N ratio) and wider detective bandwidth, and detection sensitivity is very high, so be widely used in the analysis of material character.Theory and experimental study show, a lot of industrial materials are surveyed with terahertz time-domain spectroscopic technology, can effectively produce resonance absorbing peak, thereby chaacteristic fingerprint spectrum is provided, and can carry out detection and identify.Meanwhile, under some environment, THz wave has unique strong transmission capacity and the feature of low emittance, can not damage material, and have high power and high resolving power.In high density, high temperature, magnetized plasma, THz wave equally also shows zero characteristic absorbing, and this just provides possibility for THz wave is used for detecting working temperature in magnetic trapped fusion apparatus.
In magnetic trapped fusion apparatus, divertor is mainly graphite tile, and divertor is the critical component in fusion reactor.Under actual operating conditions, the divertor surface of plasma facing will be with being subject to very large thermal load, so state of temperature and the distribution of research Divertor Materials surface under high heat load is very important.And traditional thermocouple thermometer can only be measured temperature indirectly, graphite tile state of temperature cannot accurately be described in real time, so carry out to detect synchronously and exactly hot environment by a kind of method, just seem essential.
Graphite can feature be identified at terahertz wave band, theoretical modeling calculates and shows, variation along with temperature, THz wave is injected the Terahertz spectrum that graphite is reflected back also can have corresponding variation, can there is frequency displacement in the characteristic spectral line peak of Terahertz frequency domain spectra, according to this feature, can theoretically calculate different temperatures and the frequency displacement distance of demarcating temperature (as normal temperature 300K) characteristic spectral line position, thereby determine temperature with the variation funtcional relationship of frequency shift amount, as temperature logs, be integrated into Computer Database, graphite tile working temperature and frequency displacement distance and the database of demarcating temperature Terahertz frequency domain spectra are compared, with this, can calculate the temperature of graphite tile environment of living in, these temperature are turned back in computer system in real time, thereby synchronously detect.
In sum, utilize reflected terahertz hereby Time Domain Spectrum technology in conjunction with Computer Database, for fast, synchronously detecting magnetic trapped fusion apparatus divertor graphite tile temperature when transient heat impacts, provide condition.
Summary of the invention
Object of the present invention: in order to solve above-mentioned technical matters of the prior art, provide a kind of method that detects magnetic trapped fusion apparatus divertor graphite tile transient temperature, the method that the present invention can online, synchronous and contactless undamaged detection magnetic trapped fusion apparatus divertor graphite tile temperature when transient heat impacts.
For achieving the above object, the technical scheme that the present invention just has is: a kind of method that detects magnetic trapped fusion apparatus divertor graphite tile transient temperature is provided, has specifically comprised the following steps:
Step 100: when magnetic trapped fusion apparatus divertor graphite tile is normally worked, THz wave is impinged perpendicularly on graphite tile to the terahertz time-domain wave spectrum being reflected back by graphite tile at probe measurement writing task temperature
;
Step 200: analyzing and processing terahertz time-domain wave spectrum
; By terahertz time-domain wave spectrum
in effective frequency domain, do Fourier transform and obtain the frequency domain spectra reflecting under working temperature
;
Step 300: the terahertz time-domain spectrum of graphite tile at computer theory simulation different temperatures and demarcation temperature, condition is identical with divertor working environment, above-mentioned two kinds of terahertz time-domain spectrums are effectively being done respectively to Fourier transform in frequency domain, obtaining demarcating Terahertz frequency domain spectra at temperature and the Terahertz frequency domain spectra under different temperatures;
Step 400: selected characteristic spectral line, record characteristic spectral line peak value and the frequency shift amount of demarcating this characteristic spectral line peak value at temperature under different temperatures, obtain frequency shift amount-temperature relation curve, simulate the funtcional relationship T=f (Δ ν) of frequency shift amount and temperature, as thermometric funtcional relationship, be integrated into Computer Database;
Step 500: record the frequency shift amount that characteristic spectral line peak value and Computer Database under graphite tile working temperature are demarcated this characteristic spectral line peak value at temperature, frequency shift amount Δ ν is now brought into frequency shift amount-temperature funtion relational expression, can obtains graphite tile work temperature now;
Step 600: each moment graphite tile working temperature record is stored in to computer system, reaches synchronous, fast detecting magnetic trapped fusion apparatus divertor graphite tile thermal shock transient temperature.
Beneficial effect: the present invention adopts hereby Time Domain Spectrum technology of reflected terahertz, can online, synchronously and contactless detect the thermal shock transient temperature of magnetic trapped fusion apparatus divertor graphite tile with no damage.
Accompanying drawing explanation
Fig. 1 is that the present invention adopts hereby time-domain spectroscopic technology detection of reflected terahertz Tokamak divertor graphite tile temperature schematic flow sheet.
Fig. 2 is for demarcating the Terahertz frequency domain shift of spectral line schematic diagram under temperature and different temperatures.
Fig. 3 is that the frequency shift amount-temperature funtion of simulating in database is related to schematic diagram.
Embodiment
For illustrate better reflected terahertz hereby time-domain spectroscopic technology how to be applied to detect magnetic trapped fusion apparatus divertor graphite tile temperature, below in conjunction with drawings and Examples, the present invention is described in detail.
With reference to Fig. 1, a kind of method that detects magnetic trapped fusion apparatus divertor graphite tile transient temperature, specifically comprises the following steps:
Step 100: when magnetic trapped fusion apparatus divertor graphite tile is normally worked, THz wave is impinged perpendicularly on graphite tile to the terahertz time-domain wave spectrum being reflected back by graphite tile at probe measurement writing task temperature
;
Step 200: analyzing and processing terahertz time-domain wave spectrum
; By terahertz time-domain wave spectrum
in effective frequency domain, do Fourier transform and obtain the frequency domain spectra reflecting under working temperature
;
Step 300: the terahertz time-domain spectrum of computer theory simulation different temperatures and the lower graphite tile of demarcation temperature (as normal temperature 300K), condition is identical with divertor working environment, above-mentioned two kinds of terahertz time-domain spectrums are effectively being done respectively to Fourier transform in frequency domain, obtaining demarcating Terahertz frequency domain spectra at temperature and the Terahertz frequency domain spectra under different temperatures;
Step 400: selected characteristic spectral line, record characteristic spectral line peak value and the frequency shift amount of demarcating this characteristic spectral line peak value at temperature under different temperatures, obtain frequency shift amount-temperature relation curve, simulate the funtcional relationship T=f (Δ ν) of frequency shift amount and temperature, as thermometric funtcional relationship, be integrated into Computer Database;
Step 500: record the frequency shift amount that characteristic spectral line peak value and Computer Database under graphite tile working temperature are demarcated this characteristic spectral line peak value at temperature, frequency shift amount Δ ν is now brought into frequency shift amount-temperature funtion relational expression, can obtains graphite tile work temperature now;
Step 600: each moment graphite tile working temperature record is stored in to computer system, reaches synchronous, fast detecting magnetic trapped fusion apparatus divertor graphite tile thermal shock transient temperature.
With reference to Fig. 2, when analog result displays temperature is different, Terahertz frequency domain spectra characteristic spectral line peak also can be moved, and therefore, according to this characteristic, can infer temperature by frequency domain spectra characteristic spectral line peak value frequency shift amount.
With reference to Fig. 3, theoretical modeling can simulate temperature along with the function changing relation of frequency shift amount, thereby experiment and notional result are contrasted mutually after calculating, and can obtain working temperature.
Above content is the further description of the present invention being done in conjunction with optimal technical scheme, can not assert that the concrete enforcement of invention only limits to these explanations.Concerning general technical staff of the technical field of the invention, not departing under the prerequisite of design of the present invention, can also make simple deduction and replacement, all should be considered as protection scope of the present invention.
Claims (1)
1. a method that detects magnetic trapped fusion apparatus divertor graphite tile transient temperature, specifically comprises the following steps:
Step 100: when magnetic trapped fusion apparatus divertor graphite tile is normally worked, THz wave is impinged perpendicularly on graphite tile to the terahertz time-domain wave spectrum being reflected back by graphite tile at probe measurement writing task temperature
;
Step 200: analyzing and processing terahertz time-domain wave spectrum
; By terahertz time-domain wave spectrum
in effective frequency domain, do Fourier transform and obtain the frequency domain spectra reflecting under working temperature
;
Step 300: the terahertz time-domain wave spectrum of graphite tile at computer theory simulation different temperatures and demarcation temperature, condition is identical with divertor working environment, above-mentioned two kinds of terahertz time-domain wave spectrums are effectively being done respectively to Fourier transform in frequency domain, obtaining the Terahertz frequency domain spectra under different temperatures and demarcate the Terahertz frequency domain spectra at temperature;
Step 400: selected characteristic spectral line, record characteristic spectral line peak value and the frequency shift amount of demarcating this characteristic spectral line peak value at temperature under different temperatures, obtain frequency shift amount-temperature relation curve, simulate the funtcional relationship T=f (Δ ν) of frequency shift amount and temperature, as thermometric funtcional relationship, be integrated into Computer Database;
Step 500: record the frequency shift amount that characteristic spectral line peak value and Computer Database under graphite tile working temperature are demarcated this characteristic spectral line peak value at temperature, frequency shift amount Δ ν is now brought into frequency shift amount-temperature funtion relational expression, obtains graphite tile work temperature now;
Step 600: each moment graphite tile working temperature record is stored in to computer system, reaches synchronous, fast detecting magnetic trapped fusion apparatus divertor graphite tile thermal shock transient temperature.
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| CN201210420395.1A CN103033282B (en) | 2012-10-29 | 2012-10-29 | Method detecting instant temperature of graphite tile of partial filter of magnetic confinement fusion device |
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| EP0819242A1 (en) * | 1995-04-03 | 1998-01-21 | AlliedSignal Inc. | Birefringent optical temperature sensor with adjustable temperature sensitivity |
| WO2001071366A2 (en) * | 2000-03-17 | 2001-09-27 | The Board Of Regents Of The University Of Texas System | Power spectral strain estimators in elastography |
| US6514204B2 (en) * | 2000-07-20 | 2003-02-04 | Riverside Research Institute | Methods for estimating tissue strain |
| JP2002277394A (en) * | 2001-03-15 | 2002-09-25 | Mitsuo Takeda | Method for optical measurement of optical physical property constant of dielectric substance, instrument therefor, and manufacturing system with the instrument assembled therein |
| CN100491970C (en) * | 2003-05-23 | 2009-05-27 | 首都师范大学 | Infrared heat wave detecting system with THZ wave as light source |
| US7626179B2 (en) * | 2005-09-30 | 2009-12-01 | Virgin Island Microsystems, Inc. | Electron beam induced resonance |
| JP5021221B2 (en) * | 2006-03-09 | 2012-09-05 | ニューブレクス株式会社 | Distributed optical fiber sensor |
| JP5037929B2 (en) * | 2006-12-18 | 2012-10-03 | キヤノン株式会社 | Information acquisition apparatus and method for an object using terahertz waves |
| CN100504309C (en) * | 2007-09-30 | 2009-06-24 | 南京大学 | Brillouin optical time domain reflection measuring method based on quick fourier transform |
| CN102507040B (en) * | 2011-11-10 | 2013-08-21 | 复旦大学 | Thin film temperature measurement method based on ellipsometer |
| CN102564989A (en) * | 2011-11-10 | 2012-07-11 | 中国石油大学(北京) | Terahertz-spectrum-based quick nondestructive detection method for coal |
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