X-ray tube yog dab tsi?

X-ray raj yog lub tshuab nqus tsev diodes uas ua haujlwm ntawm high voltages.
X-ray raj muaj ob lub electrodes, ib qho anode thiab cathode, uas yog siv rau lub hom phiaj yuav tsum tau bombarded nrog electrons thiab cov filament kom emit electrons, feem. Ob tug ncej yog kaw nyob rau hauv siab nqus iav los yog ceramic vaj tse.

Cov khoom siv hluav taws xob ntawm lub raj X-ray muaj tsawg kawg yog lub zog hluav taws xob tsawg rau cov cua sov ntawm cov filament thiab lub tshuab hluav taws xob siab rau kev siv hluav taws xob siab rau ob tug ncej. Thaum lub tungsten xaim dhau tam sim no txaus los tsim cov huab cua hluav taws xob, thiab qhov hluav taws xob txaus (ntawm qhov kev txiav txim ntawm kilovolts) yog siv los ntawm cov anode thiab cathode, cov huab hluav taws xob tau rub mus rau lub anode. Lub sijhawm no, cov electrons ntaus lub hom phiaj tungsten nyob rau hauv lub xeev muaj zog thiab siab ceev. Lub high-speed electrons ncav cuag lub hom phiaj nto, thiab lawv lub zog yog tam sim ntawd thaiv. Ib feem me me ntawm lawv lub zog kinetic hloov mus rau hauv hluav taws xob hluav taws xob thiab tso tawm hauv daim duab X-ray. Cov hluav taws xob tsim tawm hauv daim ntawv no yog hu ua bremsstrahlung.

Hloov cov filament tam sim no tuaj yeem hloov qhov kub ntawm cov filament thiab tus nqi ntawm cov hluav taws xob tawm, yog li hloov lub raj tam sim no thiab qhov siv ntawm X-rays. Hloov lub peev xwm excitation ntawm X-ray raj lossis xaiv lub hom phiaj sib txawv tuaj yeem hloov lub zog ntawm qhov xwm txheej X-ray lossis kev siv zog ntawm ntau lub zog. Vim lub foob pob hluav taws xob hluav taws xob siab, X-ray raj ua haujlwm ntawm qhov kub thiab txias, uas yuav tsum tau yuam kom txias ntawm lub hom phiaj anode.

Txawm hais tias lub zog ua haujlwm ntawm X-ray raj los tsim X-rays tsawg heev, tam sim no, X-ray raj tseem yog cov khoom siv hluav taws xob siv hluav taws xob zoo tshaj plaws thiab tau siv dav hauv cov cuab yeej X-ray. Tam sim no, daim ntawv thov kev kho mob feem ntau yog muab faib ua X-ray raj thiab kho X-ray raj.