CN104283106A - Radiation source generation system based on stacked chirp pulse sequence - Google Patents
Radiation source generation system based on stacked chirp pulse sequence Download PDFInfo
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- CN104283106A CN104283106A CN201410566711.5A CN201410566711A CN104283106A CN 104283106 A CN104283106 A CN 104283106A CN 201410566711 A CN201410566711 A CN 201410566711A CN 104283106 A CN104283106 A CN 104283106A
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Abstract
The invention provides a radiation source generation system based on a stacked chirp pulse sequence. The system can be applied to research about a transient dynamic mechanism. The radiation source generation system based on the stacked chirp pulse sequence comprises a mode-locked laser, a pulse frequency demultiplier, a pulse stacker, a pulse stretcher, a preamplifier, a main amplifier, a pulse compressor, an ultra-short laser pulse sequence, a pulse electron beam and an X-ray source pulse sequence. A high-repetition-frequency broadband chirp pulse source generated by the mode-locked laser is subjected to frequency demultiplication through the pulse frequency demultiplier, passes through the pulse stacker to obtain the stacked chirp pulse sequence, passes through the preamplifier and the main amplifier and then enters the pulse compressor, and the compressed ultra-short laser pulse sequence interacts with the pulse electron beam to generate the X-ray source pulse sequence.
Description
Technical field
The invention belongs to utilize and pile up chirped pulse sequence and pulsed electron beam or target material and interacts and produce the field of high flux radiation source, be specifically related to a kind of radiation source generation system based on accumulation chirped pulse sequence.
Background technology
All need to use the radiation source of short pulse high strength as diagnostic source in high-energy-density physical diagnosis, material science research and bioscience research, comprise x-ray source and particle radiation source.In some Transient Dynamics Mechanism Study, need research physics, chemistry or bioprocess high time resolution Dynamic Evolution Characteristics at short notice.At present, be widely used in the middle of scientific research based on the interact method in short pulses of radiation source of the high strength produced of high-peak power laser pulse and pulsed electron beam or target material.In order to improve the peak power of laser pulse, laser system adopts the method for chirped pulse amplification usually, obtains eventually through compressor reducer the laser pulse that pulsewidth is the psec even high-peak power of femtosecond.But the light source adjacent pulse interval that existing method produces is too large, single time point condition diagnosing can only be realized and the Transient Dynamics that cannot study in nanosecond time scales.Consider Pulse by Chirped Pulse can produce in nanosecond scale a string time interval adjustable, pulse train that waveform envelope is adjustable, the shape ultra-short pulses sequence of a string high-peak power can be produced after chirped pulse amplification also compression, train pulse radiation source can be produced again through interacting with pulsed electron beam or target material, thus can as the powerful measure of Transient Dynamics Mechanism Study.Meanwhile, the increase of laser pulse sequence total length is conducive to from laser amplifier, extract higher energy, thus obtains higher radiation source intensity.
Summary of the invention
The shortcoming of single time point condition diagnosing can only be used for for overcoming the traditional generation of the radiation source based on single laser pulse system, the invention provides a kind of radiation source based on piling up chirped pulse sequence and producing system.The present invention adds Pulse by Chirped Pulse subsystem in traditional Chirp pulse amplification laser system, the high-peak power ultrashort pulse sequence in nanosecond scale can be obtained, in order to produce series of short pulses radiation source, thus expand the Research Ability of Transient Dynamics mechanism.
Radiation source based on piling up chirped pulse sequence of the present invention produces system and contains mode-locked laser, pulse frequency demultiplier, pulse stacker, pulse stretcher, prime amplifier, main amplifier, pulse shortener, ultrashort laser pulse sequence, pulsed electron beam and x-ray source pulse train.Mode-locked laser is for generation of the Gao Zhongying laser pulse seed source with certain bandwidth; Pulse frequency demultiplier is for reducing the repetition rate of seed source; Pulse stacker is used for beam splitting time delay and is piled into laser pulse sequence again; Pulse stretcher is used for stretched pulse width so that the Energy extraction of post laser amplification; Prime amplifier is used for providing high laser gain; Main amplifier exports for obtaining high pulse energy; Pulse shortener, for compressing the pulse train after amplification, obtains the ultrashort laser pulse sequence of high-peak power; Pulsed electron beam is used for interacting with ultrashort laser pulse sequence producing x-ray source pulse train.
The operation principle that radiation source based on piling up chirped pulse sequence of the present invention produces system is: the Gao Zhongying chirped pulse seed source with certain bandwidth that mode-locked laser produces first passages through which vital energy circulates rushes frequency demultiplier and repetition rate is down to level needed for Physical Experiment.Pulse after frequency reducing obtains laser pulse sequence through pulse stacker, then enters pulse stretcher and carries out pulse stretching.Laser pulse sequence after broadening amplifies the gain of acquisition high-energy through prime amplifier, amplifies obtain high-energy output through main amplifier.Laser pulse sequence after amplification enters the ultrashort laser pulse sequence carrying out the pulsewidth of each subpulse to compress to obtain high-peak power in pulse shortener.The ultrashort laser pulse sequence of high-peak power and the pulsed electron beam of time synchronized interact, and produce the x-ray source pulse train of high strength.
Each device based on piling up in the radiation source generation system of chirped pulse sequence of the present invention can adopt the related device in blocks of solid laser system or fiber laser system.The order of pulse stretching and pulse pile-up can be exchanged.To particle radiation sources such as electronics, proton or neutrons, the pulsed electron beam of end is replaced with corresponding target material.
Radiation source based on piling up chirped pulse sequence of the present invention produces system while the ultrashort laser pulse sequence producing high-peak power, add total laser pulse width, thus increase total DISCHARGE PULSES EXTRACTION energy, and then higher radiation source intensity is obtained in pileup pulse sequence length, result of use is good.
Accompanying drawing explanation
Fig. 1 is the structured flowchart that the radiation source based on piling up chirped pulse sequence of the present invention produces the embodiment 1 of system;
Fig. 2 is the structured flowchart that the radiation source based on piling up chirped pulse sequence of the present invention produces the embodiment 2 of system;
In figure, 1. mode-locked laser 2. pulse frequency demultiplier 3. pulse stacker 4. pulse stretcher 5. prime amplifier 6. main amplifier 7. pulse shortener 8. ultrashort laser pulse sequence 9. pulsed electron beam 10.X radiographic source pulse train 11. target material 12. particle radiation source pulse train.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
Embodiment 1
In Fig. 1, radiation source based on piling up chirped pulse sequence of the present invention produces system and contains mode-locked laser 1, pulse frequency demultiplier 2, pulse stacker 3, pulse stretcher 4, prime amplifier 5, main amplifier 6, output coupler 7, pulse shortener 7, ultrashort laser pulse sequence 8, pulsed electron beam 9 and x-ray source pulse train 10.Its annexation is: mode-locked laser 1 is connected with pulse frequency demultiplier 2, pulse frequency demultiplier 2 is connected with the input of pulse stacker 3, the output of pulse stacker 3 is connected with pulse stretcher 4, pulse stretcher 4 is connected with prime amplifier 5, prime amplifier 5 is connected with main amplifier 6, main amplifier 6 is connected with pulse shortener 7, pulse shortener 7 is connected with ultrashort laser pulse sequence 8, ultrashort laser pulse sequence 8 is connected with pulsed electron beam 9, and pulsed electron beam 9 is connected with x-ray source pulse train 10.
The course of work of the present embodiment is: Gao Zhongying wideband pulse sequence is produced by mode-locked laser 1, passages through which vital energy circulates rushes frequency demultiplier 2 and repetition rate is reduced to application desired level, the laser pulse sequence of piling up is exported through pulse stacker 3, pulse train is through pulse stretcher 4 broadening, high-energy gain is obtained through prime amplifier 5, obtain high-energy through main amplifier 6 to extract, through the ultrashort laser pulse sequence 8 of pulse shortener 7 boil down to high-peak power, ultrashort laser pulse sequence 8 interacts with synchronous pulsed electron beam 9 and produces x-ray source pulse train 10.
Embodiment 2
In Fig. 2, radiation source based on piling up chirped pulse sequence of the present invention produces system and contains mode-locked laser 1, pulse frequency demultiplier 2, pulse stacker 3, pulse stretcher 4, prime amplifier 5, main amplifier 6, pulse shortener 7, ultrashort laser pulse sequence 8, target material 11 and particle radiation source pulse train 12.Its annexation is: mode-locked laser 1 is connected with pulse frequency demultiplier 2, pulse frequency demultiplier 2 is connected with the input of pulse stacker 3, the output of pulse stacker 3 is connected with pulse stretcher 4, pulse stretcher 4 is connected with prime amplifier 5, prime amplifier 5 is connected with main amplifier 6, and main amplifier 6 is connected with pulse shortener 7, and pulse shortener 7 is connected with ultrashort laser pulse sequence 8, ultrashort laser pulse sequence 8 is connected with target material 11, and target material 11 is connected with particle radiation source pulse train 12.
The course of work of the present embodiment is: Gao Zhongying wideband pulse sequence is produced by mode-locked laser 1, passages through which vital energy circulates rushes frequency demultiplier 2 and repetition rate is reduced to application desired level, the laser pulse sequence of piling up is exported through pulse stacker 3, pulse train is through pulse stretcher 4 broadening, high-energy gain is obtained through prime amplifier 5, obtain high-energy through main amplifier 6 to extract, through the ultrashort laser pulse sequence 8 of pulse shortener 7 boil down to high-peak power, ultrashort laser pulse sequence 8 and target material 11 interact and produce particle radiation source pulse train 12.
Claims (3)
1. one kind produces system based on the radiation source piling up chirped pulse sequence, it is characterized in that: described radiation source produces system and contains mode-locked laser (1), pulse frequency demultiplier (2), pulse stacker (3), pulse stretcher (4), prime amplifier (5), main amplifier (6), pulse shortener (7), ultrashort laser pulse sequence (8), pulsed electron beam (9) and x-ray source pulse train (10), its annexation is, mode-locked laser (1) is connected with pulse frequency demultiplier (2), pulse frequency demultiplier (2) is connected with pulse stacker (3), pulse stacker (3) is connected with pulse stretcher (4), pulse stretcher (4) is connected with prime amplifier (5), prime amplifier (5) is connected with main amplifier (6), main amplifier (6) is connected with pulse shortener (7), pulse shortener (7) is connected with ultrashort laser pulse sequence (8), ultrashort laser pulse sequence (8) is connected with pulsed electron beam (9), pulsed electron beam (9) is connected with x-ray source pulse train (10).
2. the radiation source based on piling up chirped pulse sequence according to claim 1 produces system, it is characterized in that: described pulsed electron beam (9) replaces with target material (11), x-ray source pulse train (10) replaces with particle radiation source pulse train (12).
3. the radiation source based on accumulation chirped pulse sequence according to claim 1 and 2 produces system, it is characterized in that: the order of connection of described pulse stacker (3) and pulse stretcher (4) exchanges.
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| CN201410566711.5A CN104283106A (en) | 2014-10-23 | 2014-10-23 | Radiation source generation system based on stacked chirp pulse sequence |
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| CN201410566711.5A CN104283106A (en) | 2014-10-23 | 2014-10-23 | Radiation source generation system based on stacked chirp pulse sequence |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104868346A (en) * | 2015-05-29 | 2015-08-26 | 中国工程物理研究院激光聚变研究中心 | Imaging device and ultra-short pulse sequence generation method |
| CN106159644A (en) * | 2016-09-21 | 2016-11-23 | 武汉虹拓新技术有限责任公司 | A kind of method and apparatus producing high energy pulse bag |
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| CN102891425A (en) * | 2011-10-11 | 2013-01-23 | 清华大学 | Ultrahigh peak power fiber amplification system for wide spectrum nanosecond pulsed light |
| CN103745760A (en) * | 2014-01-16 | 2014-04-23 | 上海交通大学 | All-optical laser plasma accelerator-based Gamma ray source |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104868346A (en) * | 2015-05-29 | 2015-08-26 | 中国工程物理研究院激光聚变研究中心 | Imaging device and ultra-short pulse sequence generation method |
| CN106159644A (en) * | 2016-09-21 | 2016-11-23 | 武汉虹拓新技术有限责任公司 | A kind of method and apparatus producing high energy pulse bag |
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