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Français - Anglais

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General information

Reference : UMR9012-SYLPRA0-019
Workplace : ORSAY
Date of publication : Thursday, September 10, 2020
Type of Contract : FTC Scientist
Contract Period : 24 months
Expected date of employment : 1 November 2020
Proportion of work : Full time
Remuneration : Between € 2,693 and € 3,132 GROSS monthly (depending on experience)
Desired level of education : PhD
Experience required : Indifferent


Study and optimization of the positron source for the FCC-ee project. The work involves detailed positron injector simulations for the future FCC-ee circular collider. This injector is a key element of the project and requires special attention. The large 6D emittance at the source and the energy deposited in the positron converter will require significant optimization work. In this context, the candidate will carry out the detailed design studies of the positron injector for the FCC-ee in order to propose a reliable configuration.


The activity of the positron source group of IJCLab is focused on the study and optimization of the positron injector of the FCC-ee collider. The post-doc will study the different positron generation schemes, focusing in particular on thermal and mechanical stresses linked to energy deposits in the target. Different options for the capture and acceleration system will be studied with the aim of optimizing the parameters. The expected result is a realistic and complete diagram making it possible to provide a positron beam with the desired characteristics.


Knowledge of accelerator physics (physical processes in targets, corpuscular optics, etc.) are essential.
-Experience in numerical scientific computing (C ++, MATLAB) as well as knowledge of software such as GEANT4, FLUKA will be particularly appreciated
-It is necessary to have a high level of knowledge and practice in the design of accelerators and in the optics of beams.
-In-depth knowledge of digital beam dynamic tools such as ASTRA, MADX, Elegant, GPT ...
-Languages: French and English (written, oral)
-Autonomy, organizational capacity and ability to present the activity in meetings.
-Capacity for communication and argumentation, synthesis and critical analysis.
-Ability to learn and develop skills, flexibility. Faculty of adaptation and creativity.

Work Context

The Irène Joliot-Curie Physics Laboratory of 2 Infinities (IJCLab) is a UMR under the supervision of the CNRS (IN2P3), the University of Paris-Saclay and the University of Paris is located on the campus of the University of Paris -Saclay in Orsay. The laboratory is located on the campus of the Université Paris-Sud, Université Paris-Saclay in Orsay. The campus is located 20 km south of Paris and easily accessible by RER in 35 minutes.
IJCLab was born in 2020 from the merger of five units (CSNSM, IMNC, IPN, LAL, LPT). The staff is made up of nearly 560 permanent (340 engineers, technicians and administrators and 220 researchers and teacher-researchers) and approximately 200 non-permanent including 120 doctoral students. The research themes of the laboratory are nuclear physics, high energy physics, theoretical physics, astroparticles, astrophysics and cosmology, particle accelerators, energy and the environment and health. IJCLab has very significant technical capacities (around 280 IT) in all the major fields required to design, develop / implement the experimental devices necessary for its scientific activity, as well as the design, development and use of instruments. .

The Physics, Instrumentation and Beam Manipulation (BIMP) team of the Accelerator Pole is made up of 22 people involved in different themes of accelerator design and associated with projects such as FCC, ThomX, MYRRHA, SPIRAL2, MLL-TRAP ... agent will report to the BIMP team leader.

The candidate will have an essential role in the positron study group. This group has a long experience in the study and realization of positron sources for different accelerators (ACO, DCI, SuperACO, LEP) that have worked as well as for projects such as SuperB, CLIC, ILC. A solution, at the initiative of this group, was chosen for the positron source of CLIC. Work missions in France, Europe and Japan are to be expected.
More information on FCC-ee: Website: https://fcc.web.cern.ch/

Constraints and risks

The work consists of numerical computer simulations followed by possible experiments on a high-energy electron beam.

Additional Information

The “Irène Joliot-Curie 2 Infinite Physics Laboratory” (IJCLab), a CNRS research laboratory located on the campus of the University of Paris-Saclay in Orsay (91), is looking for a Fixed-Term Contract of 2 years from November 1, 2020.

Candidates are invited to submit a cover letter, a CV on the CNRS Employment Portal https://emploi.cnrs.fr/ and letter (s) of recommendation to Iryna CHAIKOVSKA:


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