Tsis ntev los no, lubLub koom haum Fritz Haber (FHI)ntawm Max Planck Society hauv Berlin, Lub teb chaws Yelemees, tau ua tiav cov txheej txheem thev naus laus zis - thawj lub lag luam ntawm infrared dawb-electron laser hauv ob xim hom.
Lub ntiaj teb no-ua thev naus laus zis innovation ua rau tib lub sijhawm ob-xim laser mem tes sim ua tau thiab qhib qhov muaj peev xwm tshiab rau cov ntawv thov xws li kev kawm txog lub sijhawm txheej txheem hauv cov khib nyiab thiab cov molecules.
Tam sim no, muaj txog kaum ob lub lasers dawb-electron muaj nyob thoob ntiaj teb, uas txawv ntawm qhov loj me (los ntawm ob peb meters mus rau ob peb kilometers), wavelength range (los ntawm microwaves mus rau hard X-rays), thiab tus nqi (los ntawm lab mus rau ntau tshaj. ib billion). Txawm li cas los xij, lawv sib koom ua ke: lawv txhua tus tsim cov tawv nqaij thiab luv luv ntawm cov hluav taws xob.
Nyob rau hauv xyoo tas los no, cov lasers dawb-electron tau dhau los ua qhov tseem ceeb ntawm cov hluav taws xob hluav taws xob thiab tau siv dav hauv kev tshawb fawb thiab kev siv science.
Nws paub tias cov kws tshawb fawb ntawm Fritz Haber Institute (FHI), ua ke nrog cov neeg koom tes hauv Tebchaws Meskas, tau tsim ib txoj kev tshiab uas muaj peev xwm tsim cov pulses infrared ntawm ob xim sib txawv ib txhij.
Lub realization ntawm no technology yog ingenious: nyob rau hauv ib tug dawb electron beam kwj, lub electron beams yog thawj zaug ceev ceev los ntawm ib tug electron gas pedal mus cuag tsis tshua muaj zog kinetic zog ze rau qhov ceev ntawm lub teeb. Tom qab ntawd, cov hluav taws xob ceev ceev no dhau los ntawm qhov hloov pauv thiab raug yuam mus rau hauv txoj kev zoo li cyclotron los ntawm qhov kev txiav txim ntawm cov hlau nplaum muaj zog nrog lub sijhawm hloov polarity.
Lub oscillating kev txiav txim ntawm cov electrons ua rau lub emission ntawm electromagnetic hluav taws xob, lub wavelength ntawm uas yuav tsum precisely tswj los ntawm kev kho lub electron zog los yog lub zog ntawm lub magnetic teb. Vim li no, dawb electron lasers (FELs) muaj peev xwm tsim hluav taws xob zoo li laser nyob rau hauv yuav luag txhua qhov chaw ntawm electromagnetic spectrum, npog ntau yam ntawm ntev terahertz mus rau luv luv X-ray wavelengths.
Txij li xyoo 2012, FHI's FELs tau ua haujlwm tsis tu ncua, tsim cov hluav taws xob hluav taws xob hnyav nrog cov wavelengths uas txuas mus ntxiv nyob rau hauv nruab nrab-infrared (MIR) ntau yam, los ntawm 2.8 microns txog 50 microns. Nyob rau hauv xyoo tas los no, FHI cov kws tshawb fawb thiab cov engineers tau ua haujlwm ntawm ob-xim txuas ntxiv, ua tiav ib ceg thib ob ntawm FEL los tsim hluav taws xob nyob deb-infrared (FIR) ntawm wavelengths ntawm 5 thiab 170 microns.
Qhov kev tsim kho tshiab no tsis yog tsuas yog nthuav dav ntau ntawm cov ntawv thov rau FELs tab sis kuj qhib txoj hauv kev tshiab rau lawv txoj kev loj hlob hauv kev tshawb fawb txog kev tshawb fawb.
