CN202631716U - Transient magnetic field measuring instrument - Google Patents
Transient magnetic field measuring instrument Download PDFInfo
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- CN202631716U CN202631716U CN 201220079441 CN201220079441U CN202631716U CN 202631716 U CN202631716 U CN 202631716U CN 201220079441 CN201220079441 CN 201220079441 CN 201220079441 U CN201220079441 U CN 201220079441U CN 202631716 U CN202631716 U CN 202631716U
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- magnetic field
- measuring instrument
- laser
- plasma
- field measuring
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Abstract
The utility model relates to an instrument used for measuring laser plasma magnetic field and especially relates to a transient magnetic field measuring instrument. A method of utilizing Faraday rotation effect to measuring the magnetic field is widely applied to detection and researches of laser plasma. By adopting ultra-fast probe laser to irradiate a to-be-measured object, information of deflection angle of the probe laser after penetrating through the plasma can be obtained through analyzing experimental results of penetrating through polarizing films having different angles. The transient magnetic field measuring instrument provided by the utility model can realize measurement of the plasma in a short term. Thus, errors caused by multiple experiments are reduced. An more importantly, the cost can be reduced and the measurement is facilitated.
Description
Technical field
The utility model relates to a kind of instrument that is used for the diagnosis of laser plasma magnetic field, especially a kind of transient magnetic field measuring instrument.
Background technology
Traditional plasma magnetic-field measurement method mainly is under the long situation of plasma life period, to measure; Be because there is time enough to carry out the adjustment of instrument like this; But for the very short energetic plasma of life period; Traditional method is no longer suitable, and especially when research expensive plasma (like the light laser plasma) state, the transient magnetic field measuring instrument obtains the plasma Magnetic Field and seems particularly important.
As far as the laser plasma measuring technique, the way that adopts usually is with probe laser and generation plasmon time synchronized, studies laser plasma dynamic evolution characteristic through the mistiming of regulating probe light and main laser then.The laser plasma here is a determinand, and it is produced by main laser and matter interaction.If the method that does not adopt transient magnetic field to measure, but repeatedly adjust measurement through the plasma of structure same physical condition, so not only can bring error experimentally, and cost is very high.Therefore, it is crucial guaranteeing in once testing, to measure plasma magnetic field.
The transient magnetic field measuring instrument is to be used for measuring the very short plasma magnetic field of life period.It can obtain the information in the magnetic field of plasma from a branch of probe light, improved the precision of plasma magnetic-field measurement like this and practiced thrift cost.
The utility model content
In order to overcome the big and very high problem of cost of traditional plasma magnetic-field measurement method error, the utility model provides a kind of transient magnetic field measuring instrument.
The utility model solves the technical scheme that its technical matters adopted:
A kind of transient magnetic field measuring instrument comprises a laser instrument (11) and a determinand magnetic field measurement system that on a base (10), is arranged side by side, and it is characterized in that said laser instrument (11) is used to produce the probe laser of polarization; Said determinand magnetic field measurement system comprises a beam splitter (31), one first imaging len (41), one first polaroid (61), a catoptron (71), one second imaging len (42) and one second polaroid (62); Said elements constitutes magnetic field measurement system, is used to measure the magnetic field of said testing sample (21).
Said testing sample (21) can be laser plasma.
Said transient magnetic field measuring instrument also comprises one first ccd image sensor (51), is used to receive the measurement result that said determinand magnetic field measurement system obtains.
Said transient magnetic field measuring instrument also comprises one second ccd image sensor (52), is used to receive the measurement result that said determinand magnetic field measurement system obtains.
The beneficial effect of the utility model is that this transient magnetic field measuring instrument can be accomplished the measurement in article on plasma body magnetic field in very short time, reduced error like this and reduced cost.
Description of drawings
Fig. 1 is a transient magnetic field measuring instrument index path;
Fig. 2 is the box house of a transient magnetic field measuring instrument panorama sketch in kind;
Fig. 3 is transient magnetic field measuring instrument front side figure;
Fig. 4 is transient magnetic field measuring instrument rear side figure.
11: laser instrument;
21: testing sample;
31: beam splitter;
41,42: imaging len;
51, the 52:CCD imageing sensor;
61,62: polaroid;
71: completely reflecting mirror;
10: base;
101,102: light hole.
Embodiment
For the technological means, the creation characteristic that make this transient magnetic field measuring instrument, reach purpose and effect and be easy to understand and understand, below in conjunction with concrete diagram, further set forth this transient magnetic field measuring instrument.
Fig. 1 is a transient magnetic field measuring instrument index path.Fig. 2 is the box house of a transient magnetic field measuring instrument panorama sketch in kind; Because transient magnetic field measuring instrument box house critical piece is above-mentioned transient magnetic field measuring instrument, therefore, Fig. 2 also is the panorama sketch in kind of above-mentioned transient magnetic field measuring instrument.
Can find out that in conjunction with Fig. 1 and Fig. 2 this transient magnetic field measuring instrument is arranged on the base (10).The probe laser of the polarization that laser instrument (11) produces is divided into A, B two bundle laser beams through testing sample (21) by beam splitter (31).Wherein A bundle laser through first imaging len (41) and first polaroid (61) after, on first ccd image sensor (51), provide testing sample magnetic-field measurement result.B bundle laser through behind second imaging len (42) and second polaroid (62), provides determinand magnetic-field measurement result again through catoptron (71) on second ccd image sensor (52).Two polaroids (61) and (62) all will preestablish an initial angle; And two angles are inequality; The result who measures through two ccd image sensors (51) and (52) like this; Just can calculate probe light through the deflection angle behind the testing sample, thereby can obtain the magnetic field of testing sample according to the method for faraday's rotation.
Fig. 2 is the box house pictorial diagram of transient magnetic field measuring instrument.When carrying out magnetic-field measurement, need the transient magnetic field measuring instrument be fixed on optical table is on the base (10), and guarantees its level.
Fig. 3 is the front side figure of transient magnetic field measuring instrument.The front side has only a light hole, the probe laser of the polarization that is used for being produced through laser instrument 11.During use, need to regulate the position of transient magnetic field measuring instrument, probe laser is passed behind the testing sample (21) again from light hole normal incidence.
Fig. 4 is the rear side figure of transient magnetic field measuring instrument, and rear side has two light holes (101) and (102), and when carrying out the plasma magnetic-field measurement, two light holes (101) and (102) connect two ccd image sensors (51) respectively and data acquisition is carried out in (52).
Claims (4)
1. the transient magnetic field measuring instrument comprises a laser instrument (11) and a determinand magnetic field measurement system that on a base (10), is arranged side by side, and it is characterized in that said laser instrument (11) is used to produce the probe laser of polarization; Said determinand magnetic field measurement system comprises a beam splitter (31), one first imaging len (41), one first polaroid (61), a catoptron (71), one second imaging len (42) and one second polaroid (62); Said elements constitutes magnetic field measurement system, is used to measure the magnetic field of said testing sample (21).
2. transient magnetic field measuring instrument according to claim 1 is characterized in that, said testing sample (21) is a laser plasma.
3. according to each described transient magnetic field measuring instrument of claim 1-2, it is characterized in that, comprise one first ccd image sensor (51), the measurement result that measuring system obtains when being used to receive said determinand generation magnetic field.
4. according to each described transient magnetic field measuring instrument of claim 1-2, it is characterized in that, comprise one second ccd image sensor (52), the measurement result that measuring system obtains when being used to receive said determinand generation magnetic field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220079441 CN202631716U (en) | 2012-03-06 | 2012-03-06 | Transient magnetic field measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220079441 CN202631716U (en) | 2012-03-06 | 2012-03-06 | Transient magnetic field measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202631716U true CN202631716U (en) | 2012-12-26 |
Family
ID=47384905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220079441 Expired - Fee Related CN202631716U (en) | 2012-03-06 | 2012-03-06 | Transient magnetic field measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202631716U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109187500A (en) * | 2018-09-28 | 2019-01-11 | 北京师范大学 | Multichannel active laser diagnostic equipment |
-
2012
- 2012-03-06 CN CN 201220079441 patent/CN202631716U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109187500A (en) * | 2018-09-28 | 2019-01-11 | 北京师范大学 | Multichannel active laser diagnostic equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121226 Termination date: 20140306 |