Kodi zonyansa zimasuntha bwanji mu tungsten

Mbali imodzi ya chotengera cha vacuum (chinthu choyang'ana m'madzi a m'magazi) cha chipangizo choyesera maphatikizidwe ndi cholumikizira chamtsogolo chimakumana ndi madzi a m'magazi. Ma ion a plasma akalowa muzinthuzo, tinthu tating'onoting'ono timakhala atomu yopanda ndale ndikukhala mkati mwazinthuzo. Ngati muwona kuchokera ku maatomu omwe amapanga zinthuzo, ma ion a plasma omwe adalowa amakhala maatomu osadetsedwa. Ma atomu onyansa amayenda pang'onopang'ono m'malo olumikizirana pakati pa ma atomu omwe amapanga zinthuzo ndipo pamapeto pake, amafalikira mkati mwazinthuzo. Kumbali ina, maatomu ena onyansa amabwerera kumtunda ndipo amatulutsidwanso ku plasma. Pakutsekeka kosasunthika kwa plasma yosakanikirana, kusanja pakati pa kulowa kwa ayoni a plasma muzinthu ndi kutulutsanso kwa maatomu odetsedwa pambuyo pa kusamuka kuchokera mkati mwazinthu kumakhala kofunika kwambiri.

Njira yosamuka ya maatomu odetsedwa mkati mwazinthu zokhala ndi mawonekedwe abwino a kristalo yafotokozedwa bwino mu kafukufuku wambiri. Komabe, zida zenizeni zili ndi mapangidwe a polycrystalline, ndiyeno njira zosamukira kumadera amalire a tirigu sizinafotokozedwebe. Kupitilira apo, muzinthu zomwe zimakhudza plasma mosalekeza, mawonekedwe a kristalo amasweka chifukwa cha kulowetsedwa kwakukulu kwa ayoni a plasma. Njira zosunthira za maatomu odetsedwa mkati mwazinthu zomwe zili ndi mawonekedwe a kristalo osakhazikika sizinayesedwe mokwanira.

Gulu lofufuza la Pulofesa Atsushi Ito, wa National Institutes of Natural Sciences NIFS, lachita bwino kupanga njira yofufuzira mwachangu komanso mwachangu pamayendedwe osamukira muzinthu zomwe zimakhala ndi geometry ya atomu yosagwirizana ndi mphamvu zamamolekyulu ndi kuwerengera kofananira mukompyuta yayikulu. Choyamba, amatenga madera angapo ang'onoang'ono omwe amaphimba zinthu zonse.

Mkati mwa dera laling'ono lililonse amawerengera njira zakusamuka kwa maatomu osadetsedwa kudzera mumphamvu ya mamolekyulu. Mawerengedwe a madera ang'onoang'ono adzamalizidwa mu nthawi yochepa chifukwa kukula kwa derali ndi kochepa ndipo chiwerengero cha maatomu oti athandizidwe si ambiri. Chifukwa mawerengedwe mu dera laling'ono lililonse akhoza kuchitidwa paokha, kuwerengera kumachitika mofanana pogwiritsa ntchito makina apamwamba a NIFS, Plasma Simulator, ndi makina apamwamba a HELIOS ku Computational Simulation Center of International Fusion Energy Research Center (IFERC-CSC), Aomori, Japan. Pa Plasma Simulator, chifukwa ndizotheka kugwiritsa ntchito ma 70,000 CPU cores, kuwerengera nthawi imodzi kupitilira madera 70,000 kumatha kuchitidwa. Kuphatikiza zotsatira zonse zowerengera kuchokera kumadera ang'onoang'ono, njira zosamukira pazinthu zonse zimapezedwa.

Njira yofananira yotere yamakompyuta apamwamba imasiyana ndi yomwe imagwiritsidwa ntchito nthawi zambiri, ndipo imatchedwa MPMD3) -mtundu wa kufanana. Ku NIFS, njira yoyerekeza yomwe imagwiritsa ntchito bwino kufanana kwamtundu wa MPMD idaperekedwa. Mwa kuphatikiza kufanana ndi malingaliro aposachedwa okhudzana ndi zosintha zokha, afika panjira yothamanga kwambiri yofufuzira njira yosamukira.

Pogwiritsa ntchito njirayi, zimakhala zotheka kufufuza mosavuta njira yakusamuka kwa maatomu odetsedwa pazinthu zenizeni zomwe zili ndi malire a njere za kristalo kapena zipangizo zomwe kristalo imasokonezedwa ndi kukhudzana kwa nthawi yaitali ndi plasma. Kufufuza momwe ma atomu odetsedwa amasamuka m'kati mwa zinthu kutengera chidziwitso chokhudza njira yakusamukayi, titha kukulitsa chidziwitso chathu chokhudzana ndi kuchuluka kwa tinthu tating'onoting'ono ta plasma ndi zinthuzo. Chifukwa chake, kusintha kwa plasma kumayembekezeredwa.

Zotsatirazi zinaperekedwa mu May 2016 pa Msonkhano Wapadziko Lonse wa 22nd wa Plasma Surface Interaction (PSI 22), ndipo idzasindikizidwa mu nyuzipepala ya Nuclear Materials and Energy.


Nthawi yotumiza: Dec-25-2019