Internship M2


Atlas
b-quark identification with the ATLAS detector at HL-LHC
See more Hide
Internship supervisor:
Thomas Strebler - 04.91.82.72.52 - strebler@cppm.in2p3.fr
Description:

The Higgs boson was discovered in July 2012 by the ATLAS (http://atlas.cern) and CMS collaborations at the LHC, and led to a Nobel Prize for F. Englert and P. Higgs in 2013. Since then and till 2019, the LHC experiments are collecting a lot of new data, in order to better characterize the Higgs boson and to possibly find evidences of new physics beyond the Standard Model. However, in order to increase by a factor 100 the amount of useful data we already have, the LHC and its detectors will be upgraded for the High-Luminosity phase of LHC (2025-2035). The ATLAS group at CPPM (http://atlas.cppm.in2p3.fr), building on its previous expertise, is developing a new pixel detector to this end.


This high-tech detector plays a fundamental role to measure the trajectories of charged particles and to identify jets of particles stemming from the hadronization of bottom quarks. This ability, also known as b-tagging, is instrumental to the success of the ATLAS and (HL-)LHC physics program: Higgs coupling to top quarks and self-coupling, searches for new heavy particles.


The student will use detailed Monte-Carlo simulations to assess the b-tagging performance of various design options under consideration for the future pixel detector. The project provides an opportunity for the student to get an exposure to a broad spectrum of topics: LHC physics notably the Higgs sector; basics of silicon detectors, track-finding and pattern-recognition; b-tagging algorithms including Machine Learning algorithms (ANN, BDT, Deep Learning if time permits). The emphasis among those different topics will be chosen by the student. The project requires the use of the ROOT (http://root.cern.ch) analysis framework and the writing of C++ code: their prior knowledge is desirable but not mandatory.


Keywords:
Physique des particules
Code:
M2-1819-AT-01
HESS-CTA
Etude multi longueur d'onde des microquasars GRS 1716-249, MAXI J1535-571, et MAXI J1820+070, et recherche avec H.E.S.S. d'émission gamma de très haute énergie
See more Hide
Internship supervisor:
Jean-Pierre Ernenwein - - ernenwein@cppm.in2p3.fr - -
Description:

Le cadre de ce stage est l'expérience H.E.S.S. (https://www.mpi-hd.mpg.de/hfm/HESS) et la recherche d'émission de gammas d'énergie > 30 GeV par des systèmes binaires galactiques comprenant un trou noir ou une étoile à neutrons, et possédant des jets résolus en radio (dénommés microquasars). A l'heure actuelle seul Cygnus-X1 a montré une émission de ce type, à 4.1 sigmas seulement, mesurée par l'expérience MAGIC. Durant le stage une approche multi-longueur d'onde de trois objets sera à mener : GRS 1716-249, MAXI J1535-571, et MAXI J1820+070. Ces trois systèmes binaires, tous des Low Mass X-ray Binaries (LMXB, c'est à dire étoile compagnon de basse masse) ont été observés par H.E.S.S. en avril 2017, septembre 2017, et plusieurs fois durant l'année 2018, respectivement. En plus de l'analyse des données H.E.S.S., l'étudiant devra réunir et analyser les données d'observation publiques sur chacun de ces objets en X (MAXI, Swift, NICER, Integral), radio, gamma HE (Fermi). En particulier, en rayons X, pour lesquels l'observation est positive, des diagrammes observationnels spécifiques (Hardness-Intensity Diagrams) seront à construire, tel que dans http://www.astronomerstelegram.org/?read=12068, caractérisant les différents régimes d'émission X. Leur interprétation en termes de phénomènes physiques sous-jacents sera à mener sur des bases bibliographiques, pour y déterminer le contexte de l'observation menée par H.E.S.S. De même, une mesure du flux de gamma HE (données publiques Fermi/LAT) sera à mener : une première étape étant une mesure de type photométrie d'ouverture, l'étape suivante étant une mesure basée sur un maximum de vraisemblance signal/fond. Le stage dure 4 mois, en 2019, et peut éventuellement déboucher sur une thèse. Un exemple de publication réalisée sur le sujet (pour 3 autres objets) est disponible ici : https://arxiv.org/abs/1607.04613


Keywords:
Astroparticules
Code:
M2-1819-CT-01
KM3NeT
Multi-messenger analysis with KM3NeT/ORCA
See more Hide
Internship supervisor:
Damien Dornic, Giuliano Maggi - 04 91 82 72 86 - dornic@cppm.in2p3.fr , gmaggi@cppm.in2p3.fr - - - - - -
Description:

The KM3NeT Collaboration will instrument two deep-sea neutrino detectors in the Mediterranean Sea, a low energy site ORCA in France (5 GeV-10 TeV) and a high energy site ARCA in Italy (1 TeV-10 PeV). Both detectors will have a sensitivity largely improved compared to ANTARES at low and high energies. CPPM is the host lab of KM3NeT/ORCA and has therefore a privileged position in the Collaboration. Beginning of 2019, 6 ORCA and 2 ARCA lines should be in operation.


There is a good science case at medium energies (100 GeV - 10 TeV) where we may expect neutrino signals coming from colliding winds of galactic binary systems, obscured extra-galactic sources (AGN, GRB). The main goal of this intern-ship is to compute the high-energy performances of ORCA (above 100 GeV) using dedicated Monte Carlo simulations. Using this study, the student will be able to compute the minimal flux for specific astrophysical sources to be detect by KM3NeT/ORCA and compare the expectation with the first few months KM3NeT data.


The analyses will be performed using C++, python and Root on Linux platforms. Some knowledge in C/C++/python language is welcomed.


This subject is linked to the PhD subject Doctorat-1922-KM-01.


Keywords:
Astroparticules
Code:
M2-1819-KM-02
Detection of atmospheric neutrinos with early KM3NeT/ORCA data
See more Hide
Internship supervisor:
Jürgen Brunner - 0491827249 - brunner@cppm.in2p3.fr
Description:

KM3NeT/ORCA (Oscillation Research with Cosmics in the Abyss) is a deep sea neutrino telescope currently under construction at a depth of 2500m in the Mediterranean Sea off the coast of Toulon. ORCA is optimised for the detection of low energy (3-100 GeV) atmospheric neutrinos and will allow precision studies of neutrino properties. The first ORCA detection strings will be deployed late 2018 and early 2019.


During this intern-ship, at the Centre de Physique des Particules de Marseille, the student will actively participate in the data taking of the ORCA detector and analyse those data. The goal of the intern-ship is to extract a clean signal of upgoing atmospheric neutrinos, based on the data sample of the first few months.


Links: http://antares.in2p3.fr http://www.km3net.org http://www.cppm.in2p3.fr/rubrique.php3?id_rubrique=259


Keywords:
Physique des particules
Code:
M2-1819-KM-01
Renoir
Precision photometry of the LSST survey with GAIA for type Ia supernova cosmology
See more Hide
Internship supervisor:
Fabrice Feinstein - 04 91 82 72 16 / +33 6 31 78 84 79 - feinstein@cppm.in2p3.fr - -
Description:

The acceleration of the expansion of the Universe was discovered twenty years ago, thanks to the use of type Ia supernovae (SN Ia) as standard candles. The constituent responsible for this acceleration, which accounts for 68 percent of the density of the Universe, has been called dark energy. This phenomenon, which dominates the dynamics of expansion, remains enigmatic.


The future Large Synoptic Survey Telescope (LSST) will revolutionize our knowledge of cosmology. It will observe several tens of thousands of SN Ia under optimal conditions of a precision photometry instrument on the Chile sky. These observations will allow to construct a Hubble diagram with a statistic of SN Ia 20 to 100 times higher than that of the current diagrams which contain 700 of them. To make the most of this statistic, it is necessary to obtain per-mil photometric precision, to limit the bias in determining the luminous distance of SN Ia and of their host galaxy.


Presently, hundreds of millions of stable stars are precisely measured by the GAIA satellite. At CPPM, we develop a method based on a global fit on all these stars in order to correct for instrument and atmosphere variations. It involves manipulating (1G x 100M) size matrices with modern sparse matrix techniques. The CPPM hosts a modern HPC (800 cores, 500 GB to 1500 GB of RAM) that is availlable for the internship. During the internship, we will refine the method, and test performances on simulation. The per-mil precision goal has never been achieved previously. This will allow a characterisation of the dark energy with unprecedented precision. This work is done in collaboration with SLAC/Stanford colleagues.


Following the Master 2 internship, a thesis (2019-2022) is proposed on this topic. It is subject to be funded by the CNES and the CNRS.


Keywords:
Cosmologie observationnelle
Code:
M2-1819-RE-01
imXgam
Monte Carlo simulation of PET based on Three-photon annihilation with Compton Cameras
See more Hide
Internship supervisor:
Mathieu Dupont - - mdupont@cppm.in2p3.fr - - - -
Description:

Positron emission tomography (PET) is a technique that uses specially designed positron emitting radioactive tracers to image the functions of the body non-invasively. In conventional PET, the basic process employed is the annihilation of an emitted positron and an electron that results in two almost co-linear gamma-photons traveling in opposite directions, each with 511 keV energy. The measure of this gammas by opposite detectors give us line of response (LOR), and images of radioactive tracers are computing by accumulation of this LOR.


From time to times (rate < 5% in water), annihilation results in three coplanars photons. The low rate is compensated by the fact that detection of the three gammas gives directly the position of annihilation (from the measurement of energy and the use of momentum conservation [1]).


The objective of this internship will be 3-photon imaging by using three Compton cameras. Compton cameras have large field of view with a high sensitivity which are key advantages for this application. The trainee will simulate with the help of GATE (Monte carlo software, [2]) the three-photon annihilation and detection with Compton cameras with the GATE Monte Carlo simulation software [2]. Main tasks will be to:
- Implement three-photon annihilation in GATE
- Simulate the imaging setup comprising three Compton cameras
- Start to establish hardware requirements needed for Compton cameras in order to compete conventional PET


[1] Abuelhia, E., Kacperski, K. Spyrou, N.M. J Radioanal Nucl Chem (2007) 271: 489. https://doi.org/10.1007/s10967-007-0235-9


[2] Jan S. et al., “GATE a simulation toolkit for PET and SPECT”. Phys. Med. Biol., 2004, 49, 4543


Keywords:
Imagerie m?dicale
Code:
M2-1819-IM-01

Internship M1


No position available in this category

Internship Engineer


Electronique
Le service électronique du CPPM propose 5 stages de fin d'étude de 6 mois pour des élèves de Master2 ou de dernière année d'école d'ingénieur dans les domaines de l'électronique, la microélectronique, l'instrumentation,telecom et les systèmes embarqués.
See more Hide
Internship supervisor:
Frédéric HACHON - 04 91 82 76 71 - hachon@cppm.in2p3.fr - - - - - - - - - - - -
Description:

Les sujets de stages et une description précise sont téléchargeables ici: https://www.cppm.in2p3.fr/~hachon/stages_service_electronique


Ces stages sont encadrés par des ingénieurs experts dans la conception de systèmes d'acquisition à haut débit, la conception FPGA et d'ASIC.


Pour postuler, envoyer votre CV et votre lettre de motivation, en précisant la référence du stage, à Frédéric Hachon (hachon@cppm.in2p3.fr) qui centralise les candidatures.


Si votre profil est en adéquation avec le sujet, nous vous contacterons pour vous proposer un entretien au laboratoire.


Keywords:
Electronique
Code:
Ingenieur-1819-EL-02

Internship Bachelor 3


No position available in this category

Internship Bachelor 2


No position available in this category

Internship Bachelor 1


No position available in this category

TIPE


Since 1998, CPPM accomodates pupils of preparatory classes in order to help them carry out their TIPE.

Most of them obtained, at the time of their TIPE test, a higher grade than the national average and succesfully integrated an engineering school.

Contact: Heide Costantini