HYDROGEN 1S-2S · Precision Spectroscopy of the 1S-2S Optical Clock Transition in Atomic Hydrogen
7РП — „Хора“ (Действия „Мария Кюри“)
- Период
- 2009-10-01 → 2012-09-30
- Финансиране от ЕС
- 45 000 €
- Участници
- 1
- Схема
- MC-ERG
Линиите свързват координатора с партньорите.
Накратко на български
Оптичната честота на водородния атом се измерва с изключителна точност, включително разликите между водорода и деутерия. Тези данни помагат за по-доброто разбиране на квантовата механика и могат да подобрят GPS навигацията и телекомуникациите.
Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.
Резултати накратко
Precision Spectroscopy of the 1S-2S Optical Clock Transition in Atomic Hydrogen
During the MC-ERG grant Dr. Alnis continued to work at the Max-Planck Institute of Quantum Optics (MPQ) on the long-lasting project of precision optical spectroscopy of hydrogen atoms. Hydrogen, the simples atom, is a corner stone of Quantum Mechanics, that can be calculated and measured with ever increasing precision to understand how the Nature works. The ERG grant project was proceeding as planned and all the proposed tasks were completed. Hydrogen - Deuterium isotopic shift frequency was measured 10 times more precisely compared to the previous best published value. A new improved measurement of the 1S-2S optical transition frequency with the precision of 4 parts in 10 to power 15 was made with a help of the invited mobile Cs fountain clock from Paris. Optical fiber link to German metrology institute PTB in Braunschweig was established allowing to send frequency stabilized laser light from the MPQ to PTB via a 900 km long link with record-breaking 19 digits of precision. This impressive result is possible to achieve only using the Nobel-prize-winning optical frequency comb technique pioneered by Prof. Thodor Hänsch. For comparison, microwave links allow to send frequencies only with 16 digits of precision. Fiber link project is of global importance as it allows to improve timekeeping between metrology laboratories with a potential to have faster telecommunications and better GPS navigation. Scientific results obtained during the ERG grant period resulted in 6 peer-reviewed journal papers. Financial resources were used for attending conferences, buying consumables for experiment and to finance the stay of short-time visiting scientists who participated in the project. MPQ Laser Spectroscopy Division website: http://www.mpq.mpg.de/~haensch/ Hydrogen 1S-2S precision spectroscopy project website: http://www.mpq.mpg.de/~abeyer/hydrogen/
Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз
Цел на проекта
Field of optical atomic standards is rapidly developing. In 2008 optical atomic clocks surpassed the precision of microwave atomic clocks for the first time. The applicant continues to work at Max-Planck Institute of Quantum Optics (MPQ) on the same project as during the MC IEF with the goal to further improve the precision of the 1S-2S optical transition frequency in hydrogen and deuterium. These are the simplest atoms that have always been in the center of quantum mechanics. At MPQ a new hydrogen experimental setup is being constructed with a novel magnetic coil gun slower that will allow further improvement of the spectral resolution of the hydrogen line. This spectrometer will be able to run continuously and is important for collaborators at CERN who want to compare the optical transition frequency in antihydrogen with that of hydrogen. A novel optical fiber link scheme between MPQ and the German time keeping institute PTB in Braunschweig is set up that will allow to measure the laser frequency stabilised to hydrogen atoms with the best optical atomic clocks at PTB. This fiber link will allow to improve measurements of the H 1S-2S transition without borrwing a portable Cs fountain clock from Paris. Optical frequency distribution via an optical fiber network among the metrology institutes in European countries is presently one of prioritary tasks as it will allow to compare the clocks much faster. Better clocks will allow to search for a possible variation of fundamental constants, make faster telecommunication networks and more precise satellite navigation. Participation in these new developments increases the potential of Dr. Alnis to pursue his carrier in research in the field of optical atomic standards. The experience of the applicant on making some of the worlds most stable lasers used for the hydrogen 1S-2S experiment is now used in two other projects where applicant’s knowledge transfer to the PhD students is very important.
Оригинален текст от CORDIS (на английски).
Участници
- MAX-PLANCK-GESELLSCHAFT ZUR FORDERUNG DER WISSENSCHAFTEN EV · MUNCHENКоординаторГермания
Връзки
Данни: CORDIS, © Европейски съюз