Raws li kev tshaj tawm xov xwm txawv teb chaws, Berkeley Laboratory Laser Accelerator (Bella) qhov chaw nyob hauv Berkeley National Laboratory ntawm US Energy Department tau tsim thiab sim ib qho kev kho qhov muag uas raug ntsuas thiab tswj txoj hauj lwm ntawm lub zog laser beams thiab taw qhia rau lub yav dhau los precision. Lub kaum sab xis - tsis cuam tshuam lossis cuam tshuam nrog lub teeb laser. Cov txheej txheem tshiab no yuav pab cov neeg siv hauv zej zog kev tshawb fawb ua kom muaj zog lasers siab tshaj plaws.
Qhov kev sim ua pov thawj no yog qhia los ntawm Berkeley Lab thiab Ph.D. hauv Berkeley, California University. Nws cov kev tshawb fawb tau piav qhia hauv ib daim ntawv hauv "High Power Laser Science thiab Engineering", "High Power Laser Science thiab Engineering".
Berkeley Laboratory Accelerator Technology thiab Application Physical Ministry (ATAP) CAMERON GEDDES tau hais tias: "Qhov no yog ib qho kev nce qib loj hauv kev ntsuas thiab tswj, uas yuav muaj txiaj ntsig zoo rau cov chaw laser siab hauv ntiaj teb." Lub chaw Bella yog ib feem ntawm chav haujlwm.
Tsis cuam tshuam kev ntsuas
Qee cov neeg siv uas xav tau daim ntawv thov paub tias lub laser beam txav mus rau hauv qhov tsawg kawg nkaus los teb rau txawm tias qhov chaw soj ntsuam feem ntau tswj kev vibration thiab variation. ISONO tau hais tias: "Yog tias koj tsis nco lub hom phiaj, tsuav yog koj muaj ob peb microns, koj tuaj yeem ua qhov sib txawv ntawm cov tshuaj tsis tsim nyog ntawm kev tshawb fawb zoo thiab cov suab nrov tom qab." Cov lus qhia me me tuaj yeem ua rau tsis tsim nyog. Qhov no yog qhov chaw kuaj mob sensor thiab tawm tswv yim ua haujlwm.
Tsis muaj kev cuam tshuam kev ntsuas
Qee cov neeg siv uas xav tau daim ntawv thov paub tias lub laser beam tsiv nyob rau hauv ib tug tsawg kawg nkaus ntau yam los teb rau txawm lub feem ntau tswj lub chaw soj nstuam ib puag ncig kev co thiab variation ISONO hais tias:. "Yog tias koj tsis nco lub hom phiaj, tsuav koj muaj ob peb microns, koj tuaj yeem ua qhov sib txawv ntawm cov khoom siv tsis tsim nyog ntawm kev tshawb fawb zoo kawg nkaus thiab cov suab nrov tom qab." Cov lus qhia me me tuaj yeem ua rau tsis tsim nyog complexities. Qhov no yog qhov chaw kuaj mob sensor thiab tawm tswv yim ua haujlwm.
Lub hauv paus ntawm txoj kev tshiab no yog laser architecture nrog peb lub zog tseem ceeb. Ua ntej, nws muab tsib lub zog pulses thiab ib txhiab lub zog qis qis ib ob, txhua tus ua raws tib txoj kev. Qhov thib ob, cov kab teeb ci yog tsim los ua kom zoo dua qub, ua rau lub zog siab pulse thiab qhov loj thiab qhov sib txawv ntawm qhov qis zog pulse. Thaum kawg, nws hloov ib qho ntawm cov kab hluav taws xob xaim tsom iav nrog lub ntsej muag zoo li daim iav uas muaj cov txheej tshwj xeeb nyob rau sab pem hauv ntej thiab sab nraub qaum ntawm daim iav.
Yuav luag tag nrho cov kab teeb ci tseem ceeb tau cuam tshuam los ntawm sab xub ntiag ntawm cov khoom siv kho qhov muag yam tsis muaj kev cuam tshuam los ntawm lwm cov teebmeem tseem ceeb. Ib feem me me ntawm cov nqaj (1 feem pua ntawm lub zog nkag) tau nthuav tawm los ntawm sab xub ntiag thiab pom los ntawm sab nraub qaum. Qhov no "pob ntseg beam" yuav luag nyob rau hauv parallel nrog lub ntsiab beam los ntawm cov tom ntej no optical ntaus ntawv, thiab muaj txaus shunt los pab txhawb qhov chaw ntawm lub ntsuas. Qhov kawg tshwm sim yog tias qhov taw qhia lub kaum sab xis thiab txoj hauj lwm sab ntawm lub teeb beam muaj feem xyuam rau qhov siab beam siab.
Isono tau hais tias qhov tshwm sim yog "kev ntsuas uas tsis cuam tshuam nrog lub ntsiab laser beam, tab sis nws yog qhov tseeb heev los qhia peb txog nws qhov xwm txheej."
Cov txiaj ntsig rau Bella Center thiab lwm qhov
Lub hom phiaj tsis ntev los no ntawm cov kws tshawb fawb yog siv txoj kev kuaj mob no ua ib feem ntawm cov lus tawm tswv yim rau kev ua haujlwm ruaj khov rau sab nraud thiab taw tes lub kaum sab xis ntawm lub laser. Kev kawm ua ntej ntawm Bella center nrog 100 terawatt lasers tau cia siab. Cov ntawv sau qhia txog lub zeem muag ntawm lub zog ntawm lub zog siab 5 Hz laser los ntawm kev ua haujlwm ruaj khov ntawm lub laser mem tes ib ntus ntawm lub zog qis 1 kHz. Kev co thiab kev txav ntawm lub laser beam tshwm sim nyob rau hauv ob peb kaum ntawm Hertz, uas yog kiag li nyob rau hauv ntau yam ntawm cov tswv yim tswv yim systems. Nws cia siab tias txoj hauj lwm thiab lub kaum sab xis ntawm lub zog loj laser mem tes kis tau tus mob yuav txhim kho tsib zaug.
Kev txhim kho ntawm laser plasma particle accelerator (LPAS) yog lub luag haujlwm tseem ceeb ntawm qhov chaw ntawm Bella, uas qhia txog cov txiaj ntsig zoo ntawm qhov kev hloov tshiab no. LPAS tsim cov hluav taws xob loj heev, uas tuaj yeem ua kom cov khoom siv hluav taws xob nrawm nrawm, yog li muab kev cia siab rau cov tiam tom ntej, tus nqi pheej yig dua, tuaj yeem siv rau ntau yam kev siv. Txij li thaum lub LPA tau nrawm rau hauv lub raj nyias nyias lossis "capillary", lawv yuav tau txais txiaj ntsig zoo los ntawm kev txhim kho kev tswj hwm ntawm cov tsav laser beam txoj hauj lwm thiab taw lub kaum sab xis.
Daim ntawv thov ncaj qha nyob rau hauv nruab nrab ntawm BELLA yog muab lub teeb hluav taws xob rau cov hluav taws xob hluav taws xob dawb (FEL) siv lub laser-tsav plasma accelerator - lub cuab yeej tuaj yeem tsim lub teeb ci photon pulse tshaj qhov pom lub teeb lub zog thiab luv luv wavelength.
Isono tau hais tias: "Lub risoter, cov hlau nplaum sib nqus ntawm FEL core, muaj qhov yuav tsum tau nruj heev rau kev lees txais ntawm cov kab hluav taws xob hluav taws xob, uas cuam tshuam ncaj qha rau lub kaum sab xis thiab kab rov tav hloov pauv ntawm LPA tsav laser."
Lub tswv yim Kbella yog lub tshuab laser tiam tom ntej, uas yuav yog daim ntawv thov ua ke nrog lub zog siab thiab rov ua dua kilohertz. "Qhov kev ua haujlwm no tsis txwv rau laser plasma acceleration," tus thawj coj ntawm Bella Center tau hais. Eric Esarey "Nws daws tau qhov kev thov tshwj xeeb rau tag nrho lub zog laser kev lag luam, uas ua pov thawj lub zog siab pulse cuam tshuam nrog qis zog luam ntawv, tsis muaj kev cuam tshuam pom tseeb. Txhua qhov chaw kom dhau lub zog laser beams rau txhua daim ntawv thov ntawm qhov tseeb, Qhov kev kuaj mob no yuav coj tau Xav txog qhov kev sim ntawm laser particle sib tsoo, lossis kev sib cuam tshuam ntawm laser thiab micron precision lub hom phiaj. "
