The invention of atomic clock

Louis Essen was born in 1908 in a small city like Nottingham, England. His childhood was typical of the period and has continued his studies with joy and commitment. At the age of 20 Louis graduated from the University of Nottingham, where he had studied. At this time he began his career took off when he was asked to take on the NPL, or National Physics Laboratory.
It 'was started under Louis ' s time to the NPL, he worked on a quartz oscillator to develop as he believed they were measuring time as accurately as a pendulum clock is based. Ten years after the accession of Louis NPL had invented the Essen ring. It 'was an invention of the same name which took its name from the shape of the quartz which Louis had used in his final hours and was three times more accurate than previous versions.

Louis soon moved into newer areas of research and has begun to explore ways to measure the speed of light. During the Second World War, began to work on high-frequency radar and used his experience to develop the cavity resonance wavemeter. In 1946, it was this wavemeter which he used to do with a guy named Albert Gordon Smith, his actions Lightspeed. E 'was recently revealed that Louis de l ' has been recognized by far the most accurate measurements have at this point.

During the first half of 1950's Louis began an interest in research, which was ongoing at the National Bureau of Standards (NBS), in the United States of America, is increasing. He learned that the work on a clock that was invented more than anyone else exactly.
American scientists have been absorbed by the idea based on a clock's accuracy with the help of cancellation or atoms. At that time, Americans have been with one molecule of ammonia but Louis felt that this works so well as if they were with different atoms, such as hydrogen or cesium, and so he began work on its own clock instead of using these materials.
1953 saw Louis and a colleague, Jack Parry, has received the approval of an atomic clock based on NPL Luigi's development of existing knowledge of quartz oscillators and other technical investigations, which had, from the cavity resonance wavemeter, learned already written. Later, just two years, Louis de l'atomic clock is running, I cesium, designed by British scientists.

Development in the United States had virtually stopped because of political difficulties.
Louis continued to work on the atomic clock, and in 1964 had managed to increase the precision atomic clock with a second in 300 years for each second of 2000 years! The continued success of Louis de l'work in defining a second passage of Sequence 1 / be a mean solar day to 864,000 by the time required for 9,192,631,770 cycles of radiation is calculated with an atomic clock.
Company Louis Essen in 1997 and died before his death was honored, including an OBE and Tompion Gold Medal of the guard'.