Isibonelo Semibuzo Yengxoxo Yokusabela Okuhlanganisiwe
I-Fusion inqubo yenuzi lapho ama-nuclei amabili alula e-athomu ehlangana khona ukuze akhe i-nucleus esindayo. Lokhu kusabela kungumthombo wamandla anika amandla izinkanyezi endaweni yonke, okuhlanganisa nelanga lethu. Kulesi sihloko, sizoxoxa ngemibono eyisisekelo yokusabela kwe-fusion futhi sinikeze izibonelo nezixazululo zokuthuthukisa ukuqonda kwethu lesi simo esithakazelisayo.
Isingeniso Sokusabela Kwe-Fusion
Ukusabela kwe-fusion kwenzeka ngaphansi kwezimo zokushisa okuphezulu kakhulu kanye nengcindezi, njengalezo ezitholakala enkabeni yenkanyezi. Le nqubo ihilela ukuhlanganiswa kwama-nuclei amabili e-hydrogen (ngokuvamile i-deuterium ne-tritium) kuyi-nucleus ye-helium, okukhipha amandla amaningi kakhulu. I-equation yokusabela yile:
\[
\text{D} + \text{T} \rightarrow \text{He} + \text{n} + \text{energy}
\]
Lapha, u-D uyi-deuterium (\(^2_1\text{H}\)), u-T uyi-tritium (\(^3_1\text{H}\)), u-He uyi-helium (\(^4_2\text{He}\)), kanti u-n uyi-neutron (\(^1_0\text{n}\)).
Amandla akhiqizwayo avela ekwehlukeni kobunzima phakathi kwemikhiqizo kanye nama-reactant, ngokusho kwesibalo esidumile sika-Einstein, \(E=mc^2\), lapho \(E\) kungamand, \(m\) kungamand alahlekile, kanye \(c\) kungamand asheshayo.
Kungani Kunzima Ukufeza I-Fusion Reaction Emhlabeni?
Nakuba ukusabela kokuhlangana kukhiqiza amandla amaningi, ukudala izimo ezifanele zokuhlangana eMhlabeni kuyinselele enkulu. Amazinga okushisa kumele afinyelele izigidi zama-degree Celsius ukuze i-athomu nuclei ibe namandla anele e-kinetic ukunqoba ukuxoshwa kwe-electrostatic. Ngaphezu kwalokho, kudingeka ingcindezi enkulu ukuze i-nuclei isondele ndawonye futhi ihlangane.
Ezisetshenzisweni ezisebenzayo, njengokuhlolwa kokuhlanganiswa okulawulwayo kuma-reactor e-fusion, inselele enkulu ukugcina i-plasma (ingxube yama-nuclei amahle nama-electron amahhala) isikhathi eside ngokwanele ukuze kwenzeke ukuhlanganiswa okuphawulekayo.
Imibuzo Eyisibonelo Nengxoxo
Nazi ezinye zezibonelo zezinkinga ezingasisiza siqonde ukuthi ukusebenza kwe-fusion reactions kusebenza kanjani nokuthi izibalo zenziwa kanjani.
Umbuzo 1: Ukubalwa kwe-Fusion Energy
Ama-nuclei amabili e-deuterium ayahlangana ukuze akhe i-nucleus ye-helium-4 elabhorethri. Isisindo se-athomu se-deuterium singu-2,014 u kanti isisindo se-athomu se-helium singu-4,002 u. Bala amandla akhishwe kulokhu kusabela.
Ingxoxo:
1. Bhala i-equation yokusabela:
\[ 2\text{ } \rightarrow \text{He} \]
2. Bala Isamba Esiphelele Ngaphambi Nangemva Kokusabela:
Ngaphambi: \(2 \izikhathi 2,014 \ \text{u} = 4,028 \ \text{u}\)
Ngemva: \(4,002 \ \text{u}\)
3. Bala I-Mass Deficit:
I-Mass deficit \(= 4,028 \ \text{u} – 4,002 \ \text{u} = 0,026 \ \text{u}\)
4. Guqula ube Amandla usebenzisa i-\(E=mc^2\):
Sebenzisa ukuguqulwa okungu-1 u (iyunithi yesisindo se-athomu) = 931.5 MeV/c²:
\[
E = 0,026 \ \umbhalo{u} \izikhathi 931,5 \ \umbhalo{MeV/u} = 24,2 \ \umbhalo{MeV}
\]
Ngakho-ke, amandla akhishwe angama-24,2 MeV.
Umbuzo 2: Ukunquma Izinga Lokushisa Eliphansi Lokuhlanganiswa
Bala izinga lokushisa elincane elidingekayo ukuze kwenzeke ukusabela kwe-hydrogen fusion uma isithiyo samandla se-Coulomb (isithiyo esingaba khona phakathi kwama-nuclei amabili e-proton) singu-0,1 MeV.
Ingxoxo:
Amandla ajwayelekile e-kinetic wezinhlayiya kugesi ekushiseni \(T\) anikezwa yi-\(3/2 \ kT\), lapho \(k\) kuyi-constant kaBoltzmann (\(8,617 \times 10^{-5} \ \text{eV/K}\)).
1. Amandla e-Coulomb = Amandla e-Kinetic Aphakathi:
\[ 0,1 \ \umbhalo{MeV} = \frac{3}{2} kT \]
Guqula i-0,1 MeV ibe yi-eV: \(0,1 \ \text{MeV} = 10^{5} \ \text{eV}\).
2. Izinga lokushisa \(T\):
\[
T = \frac{2 \times 10^{5} \ \text{eV}}{3 \times 8,617 \times 10^{-5} \ \text{eV/K}}
\cishe 7,7 \izikhathi eziyi-10^{9} \ \umbhalo{K}
\]
Ngakho-ke, izinga lokushisa elincane elidingekayo ukuze i-hydrogen fusion ibe khona licishe libe ngu-\(7,7 \times 10^{9} \ \text{K}\).
Isiphetho
Ukusabela kwe-fusion kuyinqubo ebalulekile endaweni yonke, enikeza amandla asekela ukuphila eMhlabeni ngokukhishwa kwamandla elanga. Kodwa-ke, ukuphindaphinda lezi zimo eMhlabeni ngesilinganiso samandla esidingekayo kuyinselele enkulu ebhekene nabacwaningi be-plasma physics kanye nobuchwepheshe bamandla. Inkinga eyisibonelo engenhla ibonisa ukuthi kwenziwa kanjani ukubala esimweni se-fusion, kugcizelela ukubaluleka kokuqonda imiqondo eyisisekelo kanye nokuqonda izibalo ukuze kuhlolwe kabanzi kulo mkhakha.
Ekuphetheni, nakuba ukukhiqiza amandla ahlanzekile futhi azinzile kusukela ekuhlanganiseni kudinga ucwaningo olunzulu kanye nentuthuko, izinzuzo zayo ezingaba khona azinakuphikwa, ikakhulukazi emizamweni yokunciphisa ukuncika kumafutha asetshenziswayo kanye nokubhekana nokushintsha kwesimo sezulu.
