Forbidden optical transitions in highly charged ions (HCI) are the most sensitive systems for probing the variation of the fine structure constant α [1]. Moreover, they have been proposed as novel frequency standards due to their low polarizability and insensitivity to black body radiation [2]. HCI are typically produced in an electron beam ion trap (EBIT) with MK temperatures, which restricts...
Optical clocks have reached an impressive level of stability and accuracy.
Many of the systematic uncertainties can now be measured and controlled at the
fractional level of 10 −18 , with stability in the low 10 −16 at 1 s integration time.
The stability of the clocks is technically limited by the Dick effect, which is an
aliasing of high frequency noise projected in the low frequency...
Optical clocks are the most accurate time keeping instruments to date. However, widespread use is being prevented by their large size, high cost and high technical complexity of operation. To overcome these hindrances we are developing a compact, turn-key-operation portable optical clock based on trapped single Ca$^\textrm{+}$ ions. The system fits in a 4 unit 19 inch module box (500x520x160...
