Do you want to become a member in one of the most unique Organisations in the world? Then, take a look at the positions offered in the Geodetic Metrology Group! We are is always looking for students, trainees, Graduates and Staff who would like to join. Some further info about our activities: https://videos.cern.ch/record/2718427, https://videos.cern.ch/record/2298440

 

Trainees:

We are offering traineeships variying between one to six months on various topics on survey activities, IT, mecatronics, alignment, metrology and further fields of interest. To know more, please apply via Smartrecruiters and contact us then via e-mail (be.gm.secretariat@cern.ch).

Creation of a mobile vertical reference system for calibration of the Survey train inclinometers:

The GM group is developing a photogrammetric measuring device called the "Survey train”, a tool that will be installed on a rail so that it can move autonomously. To qualify it, a manual prototype has been created. In order to differentiate between the vertical and horizontal components of a 3D distance measurement. Calibration is currently carried out using a known reference network in a vertical reference frame using a laser tracker. However, this installation is restrictive because it requires the regular measurement of numerous points. The aim is therefore to find a system that will enable targets to be verticalized quickly and anywhere.

Reporting to your supervisor, as part of the GM-ASG team you will have several objectives:

• Taking part in field measurements and data processing, integrate calibration measurements into a calculation incorporating train and sensor measurements.
• Gather information on the calibration needs and constraints of the ASG section.
• Implement one or more calibration processes, qualify them, compare results and calculate calibrations.
• Adapt the acquisition process according to the conclusions of the previous stages.

We are looking for a student in their 5th year of master’s degree with a good proficiency in English and/or French and the contract dates will be from February until July 2024. The student must have a good understanding of the photogrammetric process, using the least squares method, either using a programming language like Matlab or Python.

 

Fiducialisation of WPS sensors by photogrammetry

During LS3 (Long Shutdown 3, from 2026 to 2028) hundreds of new WPS (Wire Positioning System) sensors will be installed on the HL-LHC (High-Luminosity Large Hadron Collider) components to measure the LSS (Long Straight Section) very precisely. In order to link the measurements made by these sensors in the LSS and the rest of the machine, a photogrammetric measurement device called "Survey train" is being developed in the section. The principle is to use photogrammetry to measure targets engraved on the sensor. Then, thanks to a fiducialisation previously made with a precision between 5 to 10 µm, it will be possible to link the measurement of the sensor with the measurement of the train.

During your CERN internship and under the direction of your supervisor, you'll focus on advancing sensor fiducialisation for HL-LHC's WPS sensors. Your tasks include understanding current processes, gathering ASG section's needs, developing and documenting a refined fiducialisation process, comparing tools, adapting methods, performing precise calibrations, and integrating data into comprehensive calculations. This hands-on experience will enhance your skills in advanced measurement techniques and data analysis.

The required qualifications for this position include being in the 5th year of a master's degree program, with the commitment to remain a full-time registered student throughout the internship at CERN. Proficiency in English and/or French is also essential for effective communication and collaboration in the work environment.

Candidates must possess a strong understanding of the photogrammetric process, demonstrating proficiency in employing the least squares method for precise calculations. Proficiency in programming languages such as Matlab and Python is essential, enabling the automation of tasks and efficient data analysis. Additionally, attention to detail, thoroughness, and a curious mindset are crucial attributes, driving candidates to explore innovative solutions and ensure the accuracy of their work.

 

 

Applications to be submitted via SmartRecruiters and more information about benefits can be found here.

If you have any further queries, please contact Florian Barcet florian.barcet@cern.ch  or Jean-Frederic Fuchs: jean-frederic.fuchs@cern.ch.

Please note that the deadline for the application is: 30/11/2023. 

 

Students:

Development and optimization of high precision multi-channel Fourier based Frequency Sweeping Interferometry insensitive to vibration impacts

The PhD student will focus on the development of a low cost Fourier based FSI interferometer to be used in large scale metrology installation, to provide long distance measurements and being insensitive to variation of optical path length. The system developed should allow vibrations monitoring. The measuring unit developed should allow multi distance measurements over 20 m with accuracies at the level of 1 um.

Application via Smartrecruiters.

 

Graduates:

Survey Engineer

As a survey engineer in the BE-GM-ASG section, you will :

• Perform the alignment of accelerators components in the injector complex and LHC tunnel and ensure the maintenance of the related geodetic networks,
• Perform metrology measurements at all stages during the assembly of accelerator components using laser trackers,
• Provide feedback to improve the survey field procedures, methods and software,
• Perform "as built" measurements of tunnels and buildings using the laser scanner technology,
• Perform the calibration and periodic validation of the instrumentation,
• Be involved in the testing process of the survey software developed at CERN,
• Improve and optimize related survey procedures, methods and software.

The skills and/or technical competencies you should have and/or know:  

• Knowledge and application of high-precision survey methods and tools: laser tracker, optical and digital levels, total station,
• Knowledge and practice of standard compensation software: theories, concepts and algorithms related to the least square adjustment,
• Laser Scanning; basic use of instruments and software,
• Demonstrating Flexibility: Adapting quickly and resourcefully to shifting priorities and requirements. Actively participating in the implementation of new processes and   technologies,
• Working in teams: working well in groups and readily fitting into a team; participating fully and taking an active role in team activities,

Metrology Software Developer

You will become a vital member of our dynamic development team at CERN, collaborating on the TSUNAMI software, the primary data acquisition solution of the CERN Geodetic Metrology Group within the Beams Department.
Our in-house developed TSUNAMI software is the interface that enable precise measurements and alignments of accelerators, transfer lines, and detectors across the entire CERN site.
Collaborate on the development of an enhanced version of TSUNAMI in preparation for the upcoming CERN long shutdown, during which extensive infrastructure re-measurement and alignment will be conducted.
Contribute to the creation and maintenance of automated testing procedures while also executing tests that require manual intervention.
Engage directly with TSUNAMI users to gather feedback and gain insights into various measurement techniques and the unique working conditions within tunnels and experimental areas.

Required Skills:

• Practical experience in metrology.
• Proficiency in Object-Oriented Programming.
• Strong teamwork and collaboration skills.

Preferred Skills:

• Prior experience with the usage of total-station or laser-tracker equipment.
• Familiarity with C# and WinForm development.
• Knowledge of Git/GitLab and related continuous integration tools.

 

For all Graduate positions, please apply via Smartrecruiters.

Staff:

Currently, no open positions.