{"id":2091,"date":"2026-11-06T17:23:05","date_gmt":"2026-11-06T14:23:05","guid":{"rendered":"https:\/\/teknolata.com\/?p=2091"},"modified":"2026-11-06T17:23:05","modified_gmt":"2026-11-06T14:23:05","slug":"cin-uzay-istasyonunda-97-pk-ile-yeni-rekor","status":"publish","type":"post","link":"https:\/\/teknolata.com\/index.php\/2026\/11\/06\/cin-uzay-istasyonunda-97-pk-ile-yeni-rekor\/","title":{"rendered":"\u00c7in Uzay \u0130stasyonunda 9,7 pK ile Yeni Rekor"},"content":{"rendered":"

\u00c7in Uzay \u0130stasyonu Tiangong\u2019daki Mengtian laboratuvar\u0131nda \u00e7al\u0131\u015fan ara\u015ft\u0131rmac\u0131lar, rubidyum atomlar\u0131ndan olu\u015fan bir bulutun genle\u015fmesini inceleyerek 9,7 pikokelvin (pK) e\u015fde\u011fer s\u0131cakl\u0131k<\/strong> \u00f6l\u00e7t\u00fcklerini bildirdi. Sonu\u00e7, China Science\u2019\u0131n payla\u015f\u0131m\u0131nda ve \u00c7in Bilimler Akademisi\u2019nin (CAS) 6 Kas\u0131m 2026 tarihli a\u00e7\u0131klamas\u0131nda duyuruldu. Deneyin ayr\u0131nt\u0131lar\u0131, Science dergisinin 5 Kas\u0131m 2026 tarihli makalesinde yay\u0131mland\u0131.<\/p>\n

Bir pikokelvin, kelvinin trilyonda biridir. Dolay\u0131s\u0131yla 9,7 pK, mutlak s\u0131f\u0131r\u0131n yakla\u015f\u0131k 9,7 trilyonda biri derece \u00fczerindeki bir s\u0131cakl\u0131k \u00f6l\u00e7e\u011fine kar\u015f\u0131l\u0131k gelir. Ancak bu de\u011fer, Mengtian laboratuvar\u0131ndaki b\u00fct\u00fcn donan\u0131m\u0131n veya \u00e7evrenin bu s\u0131cakl\u0131\u011fa kadar so\u011futuldu\u011fu anlam\u0131na gelmez. \u00d6l\u00e7\u00fclen de\u011fer, serbest b\u0131rak\u0131lan atom bulutunun hareketinden \u00e7\u0131kar\u0131lan e\u015fde\u011fer s\u0131cakl\u0131kt\u0131r.<\/u> Bu ayr\u0131m, rekorun neyi ifade etti\u011fini do\u011fru anlamak a\u00e7\u0131s\u0131ndan \u00f6nemlidir.<\/p>\n

Rekor \u00f6l\u00e7\u00fcm neyi g\u00f6steriyor?<\/h2>\n

Deneyde yakla\u015f\u0131k 20.000 rubidyum-87 atomundan olu\u015fan bulut, so\u011futma ve haz\u0131rl\u0131k a\u015famalar\u0131n\u0131n ard\u0131ndan serbest b\u0131rak\u0131ld\u0131. Ara\u015ft\u0131rmac\u0131lar atomlar\u0131n geni\u015flemesini yakla\u015f\u0131k 7 saniye boyunca izledi. Atomlar\u0131n hareketi ne kadar yava\u015fsa, bulutun e\u015fde\u011fer s\u0131cakl\u0131\u011f\u0131 da o kadar d\u00fc\u015f\u00fck kabul edilir. Bu nedenle \u00f6l\u00e7\u00fcm, atomlar\u0131n son derece d\u00fc\u015f\u00fck h\u0131zlara indirilebildi\u011fini ve uzay istasyonundaki mikrogravite ko\u015fullar\u0131n\u0131n uzun s\u00fcreli g\u00f6zlem yap\u0131lmas\u0131na imk\u00e2n verdi\u011fini ortaya koyuyor.<\/p>\n

CAS a\u00e7\u0131klamas\u0131nda, elde edilen de\u011ferin oda s\u0131cakl\u0131\u011f\u0131yla kar\u015f\u0131la\u015ft\u0131r\u0131ld\u0131\u011f\u0131nda yakla\u015f\u0131k 14 mertebe daha d\u00fc\u015f\u00fck bir \u00f6l\u00e7e\u011fe kar\u015f\u0131l\u0131k geldi\u011fi aktar\u0131l\u0131yor. Bununla birlikte, bu kar\u015f\u0131la\u015ft\u0131rma g\u00fcndelik anlamda bir laboratuvar\u0131n oda s\u0131cakl\u0131\u011f\u0131ndan do\u011frudan 14 mertebe daha so\u011fuk oldu\u011fu \u015feklinde yorumlanmamal\u0131d\u0131r. S\u00f6z konusu olan, atom bulutunun hareket enerjisinden hesaplanan fiziksel bir e\u015fde\u011ferliktir. Deneyin as\u0131l bilimsel katk\u0131s\u0131, a\u015f\u0131r\u0131 so\u011fuk atomlar\u0131 mikrogravitede daha uzun s\u00fcre g\u00f6zlemleyebilmek ve kuantum gazlar\u0131n\u0131n davran\u0131\u015f\u0131n\u0131 daha ayr\u0131nt\u0131l\u0131 ara\u015ft\u0131rabilmektir.<\/p>\n

Mikrogravite neden avantaj sa\u011fl\u0131yor?<\/h2>\n

Yery\u00fcz\u00fcnde yer\u00e7ekimi, serbest b\u0131rak\u0131lan atom bulutunu a\u015fa\u011f\u0131 do\u011fru \u00e7eker. Bu d\u00fc\u015f\u00fc\u015f, bulutun \u00f6l\u00e7\u00fcm b\u00f6lgesinde kalabildi\u011fi s\u00fcreyi s\u0131n\u0131rlar; ayr\u0131ca atomlar\u0131 \u00e7ok zay\u0131f bir tuzakta tutmay\u0131 ve a\u015f\u0131r\u0131 d\u00fc\u015f\u00fck s\u0131cakl\u0131klara indirildikten sonra incelemeyi zorla\u015ft\u0131r\u0131r. Uzay istasyonundaki mikrogravite ortam\u0131 yer\u00e7ekimini tamamen ortadan kald\u0131rmaz, ancak etkisini deney \u00f6l\u00e7e\u011finde b\u00fcy\u00fck \u00f6l\u00e7\u00fcde azalt\u0131r. B\u00f6ylece atom bulutu daha uzun s\u00fcre g\u00f6zlemlenebilir ve ara\u015ft\u0131rmac\u0131lar onun geni\u015flemesini daha hassas bi\u00e7imde takip edebilir.<\/p>\n

CAS\u2019\u0131n aktard\u0131\u011f\u0131 fizik\u00e7i Wolfgang Ketterle\u2019nin de\u011ferlendirmesine g\u00f6re, 7 saniyelik serbest geni\u015fleme s\u00fcresi D\u00fcnya\u2019da kabaca 250 metrelik bir d\u00fc\u015f\u00fc\u015fe denk gelebilecek bir zaman aral\u0131\u011f\u0131d\u0131r. Bu benzetme, uzaydaki g\u00f6zlem penceresinin neden \u00f6nemli oldu\u011funu a\u00e7\u0131kl\u0131yor: Yerde ayn\u0131 s\u00fcre boyunca serbest kalan bir bulut, uygun bir d\u00fczenek olmadan deney b\u00f6lgesinden uzakla\u015f\u0131rd\u0131. Mikrogravite, atomlar\u0131 daha zay\u0131f bi\u00e7imde ba\u011flama ve \u00f6l\u00e7\u00fcm i\u00e7in daha uzun zaman kazanma olana\u011f\u0131 sunuyor.<\/p>\n

Bu t\u00fcr deneyler, Bose-Einstein yo\u011fu\u015fmas\u0131<\/strong> ve kuantum gazlar\u0131n\u0131n incelenmesiyle de ba\u011flant\u0131l\u0131d\u0131r. \u00c7ok d\u00fc\u015f\u00fck s\u0131cakl\u0131klarda atomlar\u0131n kuantum \u00f6zellikleri b\u00fcy\u00fck \u00f6l\u00e7ekte g\u00f6r\u00fcn\u00fcr h\u00e2le gelir ve \u00e7ok say\u0131da atom ortak bir kuantum sistemi gibi davranabilir. Uzun g\u00f6zlem s\u00fcresi, bu sistemlerin olu\u015fumunu ve evrimini izlemek i\u00e7in de\u011ferli bir ara\u015ft\u0131rma f\u0131rsat\u0131 yarat\u0131r. Bununla birlikte, rekor s\u0131cakl\u0131k \u00f6l\u00e7\u00fcm\u00fc tek ba\u015f\u0131na yeni bir uygulaman\u0131n veya teknolojik \u00fcr\u00fcn\u00fcn haz\u0131r oldu\u011fu anlam\u0131na gelmez; \u00e7al\u0131\u015fma \u00f6ncelikle temel fizik ara\u015ft\u0131rmas\u0131 niteli\u011findedir.<\/p>\n

Tiangong\u2019daki deney d\u00fczene\u011fi<\/h2>\n

\u00c7al\u0131\u015fmada kullan\u0131lan tesis, Tiangong Uzay \u0130stasyonu\u2019nun Mengtian laboratuvar\u0131nda yer alan Cold Atom Physics Rack (CAPR) adl\u0131 so\u011fuk atom fizi\u011fi d\u00fczene\u011fidir. Tesis, pop\u00fcler kaynaklarda zaman zaman \u201cs\u00fcper buzdolab\u0131\u201d olarak an\u0131l\u0131yor; ancak bu ifade, s\u0131radan bir buzdolab\u0131ndan \u00e7ok daha karma\u015f\u0131k olan atom so\u011futma ve \u00f6l\u00e7\u00fcm sistemini basitle\u015ftiren bir benzetmedir. CAPR, Mengtian mod\u00fcl\u00fcyle birlikte 2022\u2019de y\u00f6r\u00fcngeye g\u00f6nderildi. Projenin de\u011ferlendirme ve geli\u015ftirme s\u00fcrecinin ise 2011\u2019de ba\u015flad\u0131\u011f\u0131 bildiriliyor.<\/p>\n

Uzay u\u00e7u\u015funda kullan\u0131labilmesi i\u00e7in sistemin k\u00fctlesi ve kaplad\u0131\u011f\u0131 hacim \u00f6nemli \u00f6l\u00e7\u00fcde azalt\u0131ld\u0131. Aktar\u0131lan kar\u015f\u0131la\u015ft\u0131rmaya g\u00f6re, yerde yakla\u015f\u0131k 20 metrek\u00fcp hacim kaplayan ve 10 ton a\u011f\u0131rl\u0131\u011f\u0131ndaki bir d\u00fczenek uzay s\u00fcr\u00fcm\u00fc i\u00e7in yakla\u015f\u0131k 0,7 metrek\u00fcp ve 0,5 ton \u00f6l\u00e7e\u011fine indirildi. Bu k\u00fc\u00e7\u00fcltme, y\u00fcksek hassasiyetli optik ve atom fizi\u011fi bile\u015fenlerini s\u0131n\u0131rl\u0131 hacim ve k\u00fctle i\u00e7inde \u00e7al\u0131\u015ft\u0131rma gereklili\u011fini yans\u0131t\u0131yor. Uzay ko\u015fullar\u0131nda g\u00fcvenilir \u00e7al\u0131\u015fmas\u0131 gereken d\u00fczenek, atomlar\u0131 haz\u0131rlama, so\u011futma, tuzaklama ve g\u00f6r\u00fcnt\u00fcleme i\u015flevlerini bir arada y\u00fcr\u00fct\u00fcyor.<\/p>\n

So\u011futma y\u00f6ntemi ve teknik g\u00fc\u00e7l\u00fckler<\/h2>\n

Ara\u015ft\u0131rmac\u0131lar t\u00fcm-optik tuzak (all-optical trap veya ODT), buharla\u015ft\u0131rmal\u0131 so\u011futma ve adiyabatik olmayan genle\u015fme ad\u0131mlar\u0131ndan yararland\u0131. Optik tuzak, lazer \u0131\u015f\u0131\u011f\u0131n\u0131n atomlar\u0131 belirli bir b\u00f6lgede tutmas\u0131na yard\u0131mc\u0131 olur. Buharla\u015ft\u0131rmal\u0131 so\u011futmada daha enerjik atomlar\u0131n sistemden uzakla\u015ft\u0131r\u0131lmas\u0131, geride kalan atomlar\u0131n ortalama enerjisinin d\u00fc\u015fmesini sa\u011flar. Ard\u0131ndan atom bulutunun kontroll\u00fc bi\u00e7imde geni\u015flemesi, hareket h\u0131zlar\u0131n\u0131n ve dolay\u0131s\u0131yla e\u015fde\u011fer s\u0131cakl\u0131\u011f\u0131n incelenmesine imk\u00e2n verir.<\/p>\n

Mikrogravite, uzun s\u00fcreli g\u00f6zlem i\u00e7in avantaj sa\u011flasa da so\u011futma s\u00fcrecinin her a\u015famas\u0131n\u0131 otomatik olarak kolayla\u015ft\u0131rmaz. \u00c7al\u0131\u015fmada, uzay ko\u015fullar\u0131nda buharla\u015ft\u0131rmal\u0131 so\u011futman\u0131n verimlili\u011fini art\u0131rmak i\u00e7in manyetik gradyan deste\u011fi geli\u015ftirildi\u011fi belirtiliyor. Bu t\u00fcr teknik d\u00fczenlemeler, atomlar\u0131n uygun bi\u00e7imde haz\u0131rlanmas\u0131na ve \u00e7ok d\u00fc\u015f\u00fck enerjili durumlara ula\u015f\u0131lmas\u0131na yard\u0131mc\u0131 olur. Sonu\u00e7, yaln\u0131zca d\u00fc\u015f\u00fck bir s\u0131cakl\u0131k de\u011ferine ula\u015fmaktan ibaret de\u011fildir; ayn\u0131 zamanda bu ko\u015fullar\u0131 y\u00f6r\u00fcngede g\u00fcvenilir bi\u00e7imde \u00fcretme ve \u00f6l\u00e7me kapasitesini de g\u00f6sterir.<\/p>\n

\u00c7al\u0131\u015fmada Peking University, Shanghai Institute of Optics and Fine Mechanics ve \u00c7in Bilimler Akademisi\u2019ne ba\u011fl\u0131 Technology and Engineering Center for Space Utilization (CSU) ara\u015ft\u0131rmac\u0131lar\u0131 yer ald\u0131. Bulgular\u0131n Science\u2019ta yay\u0131mlanmas\u0131, deneyin y\u00f6ntem ve sonu\u00e7lar\u0131n\u0131n bilimsel de\u011ferlendirme s\u00fcrecinden ge\u00e7ti\u011fini g\u00f6steren yay\u0131n bilgisidir. Kamuya a\u00e7\u0131klanan \u00f6zetlerdeki \u00f6l\u00e7\u00fcm ve teknik ayr\u0131nt\u0131lar, sonu\u00e7lar\u0131n kapsam\u0131n\u0131 anlamak i\u00e7in CAS a\u00e7\u0131klamas\u0131 ve makale metniyle birlikte de\u011ferlendirilmelidir.<\/p>\n

\u00d6nceki deneylerle ili\u015fkisi ve bilimsel \u00f6nemi<\/h2>\n

A\u015f\u0131r\u0131 so\u011fuk atom deneyleri daha \u00f6nce de uzay ortam\u0131nda y\u00fcr\u00fct\u00fcld\u00fc. Verilen kar\u015f\u0131la\u015ft\u0131rmalarda, mikrogravitede manyetik tuzakla yakla\u015f\u0131k 38 pK, NASA\u2019n\u0131n Uluslararas\u0131 Uzay \u0130stasyonu\u2019ndaki Cold Atom Lab (CAL) deneylerinde ise yakla\u015f\u0131k 52 pK de\u011ferlerinden s\u00f6z ediliyor. Bu rakamlar farkl\u0131 d\u00fczeneklere, y\u00f6ntemlere ve \u00f6l\u00e7\u00fcm ko\u015fullar\u0131na ait oldu\u011fundan, kar\u015f\u0131la\u015ft\u0131rma yap\u0131l\u0131rken her \u00e7al\u0131\u015fman\u0131n tan\u0131m\u0131 ve \u00f6l\u00e7\u00fcm y\u00f6ntemi dikkate al\u0131nmal\u0131d\u0131r. Tiangong\u2019daki 9,7 pK sonucu, a\u00e7\u0131klanan e\u015fde\u011fer s\u0131cakl\u0131k \u00f6l\u00e7\u00fcm\u00fc bak\u0131m\u0131ndan bu deneyler aras\u0131nda daha d\u00fc\u015f\u00fck bir de\u011fer olarak sunuluyor.<\/p>\n

Uzayda geli\u015ftirilen so\u011fuk atom sistemleri, gelecekte hassas \u00f6l\u00e7\u00fcm, kuantum fizi\u011fi ve temel fizik ara\u015ft\u0131rmalar\u0131 i\u00e7in yeni deney olanaklar\u0131 sa\u011flayabilir. Ancak bu ara\u015ft\u0131rmalar\u0131n do\u011frudan ticari kullan\u0131ma d\u00f6n\u00fc\u015fmesi zaman alabilir ve sonu\u00e7lar hen\u00fcz bir t\u00fcketici \u00fcr\u00fcn\u00fcn\u00fcn performans\u0131 veya sat\u0131\u015fa \u00e7\u0131kaca\u011f\u0131 tarih hakk\u0131nda bilgi vermiyor. T\u00fcrkiye i\u00e7in de a\u00e7\u0131klanm\u0131\u015f bir \u00fcr\u00fcn fiyat\u0131, sat\u0131\u015f tarihi ya da yerel kullan\u0131m plan\u0131 bulunmuyor. Haberin \u00f6nemi, bir \u00fcr\u00fcn duyurusundan ziyade mikrogravitenin bilimsel \u00f6l\u00e7\u00fcmlere a\u00e7t\u0131\u011f\u0131 yeni g\u00f6zlem imk\u00e2n\u0131nda yat\u0131yor.<\/p>\n

Genel olarak deney, iki ayr\u0131 ba\u015far\u0131y\u0131 bir araya getiriyor: Atom bulutunun hareketinden 9,7 pK d\u00fczeyinde bir e\u015fde\u011fer s\u0131cakl\u0131k elde edilmesi ve bu bulutun uzay istasyonunda 7 saniyeye kadar izlenebilmesi. \u00d6l\u00e7\u00fcm, Tiangong\u2019un tamam\u0131n\u0131n bu s\u0131cakl\u0131\u011fa so\u011futuldu\u011funu de\u011fil, rubidyum atomlar\u0131n\u0131n ola\u011fan\u00fcst\u00fc d\u00fc\u015f\u00fck hareket enerjisine ula\u015ft\u0131\u011f\u0131n\u0131 g\u00f6steriyor.<\/b> Bu ayr\u0131m korundu\u011funda, sonu\u00e7 hem rekorun bilimsel anlam\u0131n\u0131 hem de uzay ortam\u0131n\u0131n ara\u015ft\u0131rmaya sa\u011flad\u0131\u011f\u0131 katk\u0131y\u0131 daha a\u00e7\u0131k bi\u00e7imde ortaya koyuyor.<\/p>\n

Deneyden \u00f6ne \u00e7\u0131kan teknik bilgiler<\/h2>\n