Residual Amplitude Modulation Servo Electronics Design and Implementation

European Gravitational Observatory

Internship 5 months Cascina, Italy

Uploaded 23 Dec 2018

Job Description

The Virgo interferometer is the most sensitive gravitational-wave detector in Europe. An essential part of the detector is the electronics for the front-end associated with light sensors used in the experiment and that of the control systems. Several feedback loops necessary to meet the project sensitivity requirements need to guarantee high performance both in terms of noise suppression and dynamics. This holds true for the Residual Amplitude Modulation Stabilization (RAMS). Its goal is to suppress the unwanted amplitude modulation introduced as a collateral effect of the phase modulation of the Advanced Virgo Laser beam to values of the order of few parts per billion of the sideband amplitude. This represents a very challenging goal and a system with this level of performance cannot simply be bought on the market. Therefore, it must be custom developed. 

Within the Electronics Group, the student will be in charge of designing and then building the printed circuit board for RAMS Servo electronics using electronic design CAD software packages. Once the unit is fully assembled, its complete characterization will be required with adequate laboratory instrumentation to validate its performance and certify it meets the specifications. The candidate will at first get acquainted with the software tools used at EGO for electronic board design and afterwards become familiar with the instrumentation available in the electronics laboratory up to the point where it can be used autonomously, with confidence, and reliably. 

For the whole duration of the internship, EGO will pay a gross monthly wage of 500,00 euro and offer the lunch service at its canteen during working days to the student.

Interested candidates are invited to fill in the Internship Application Form and send it, together with the CV, to [email protected]

Person Specification

  • The applicant should have completed (or complete soon) his/her third year of Electronics study at University level (Bachelor/Laurea triennale). 
  • English required. 
  • Good attitude to electronic experimental work is an asset.
  • European citizenship.
  • No criminal convictions. 


    • EU National