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PhD defense


Experimental study of metastable solid and superfluid helium-4

PhD thesis by Qu An – Supervisor: Pr Philippe Jacquier, UPMC

Oral defense will take place at 11 am on Friday, January 20 in room L361 (3rd floor – ENS Physics Dept – 24 rue Lhomond, 75005 Paris).

AbstractRésumé

Book chapter

“History and physical principles of MRI” 

by M. E. Hayden and P.-J. Nacher.

Magn. Reson. Imaging Handbook, 1

(CRC press, 2016 — Ed. Luca SABA)

Cover_chapter

Kastler Symposium 2016

Pierre-Jean Nacher has been involved in the organisation of the Alfred Kastler Scientific Symposium 2016, a one-day event which took place on Thursday, December 1st, at the ENS. Video recordings are available for all contributions to this symposium.

Kastler_BallonSodiumAlfred Kastler, Nobel Prize in Physics in 1966, “for the discovery and development of optical methods for studying Hertzian resonances in atoms”.

Read more about the events organised in Paris for the 50th anniversary of Alfred Kastler’s Nobel prize in Physics, to celebrate both the scientist and the man.

WideNMR (2016 — ....)

Analytics
A new, multidisciplinary, collaborative project supported by the Région Ile de France.

Scientific partners: IRAMIS, CEA Saclay; IFSTTAR; LKB.
Objectives: Exploration of innovative concepts and applications in a very wide bore NMR spectrometer.

Lattice simulations in NMR - CPU versus GPU?

ICSU_short
An exploratory, interdisciplinary, and collaborative research project has been granted support by the ICS@SU (Institute for Computing and Simulation, Sorbonne Universités) – 2016 call : “Master2+2”.
Scientific partner: E. Baudin, Piere Aigrain Laboratory.
Objective: Massively parallel computing for lattice simulations in NMR and MRI

Oral contribution to QFS2016

logo-QFS2016

Qu An‘s contribution “Observation of metastable solid and superfluid helium-4 around 1 K” has been selected for oral presentation at the International Conference on Quantum Fluids and Solids 2016 (10-16 August, Prague, Czech Republic) .

People

Tous
Polarised He & quantum fluids
Quantum solid & liquid He
  • Franck Laloë
  • Pierre-Jean Nacher
  • Geneviève Tastevin
  • Polar. 3He - Other People
  • Philippe Jacquier
  • Jules Grucker
  • Qu An
  • Solid 4He - Other people
Recent Papers

On the destabilization of metastable solid 4He

F. Souris, A. Qu, J. Dupont-Roc, J. Grucker, Ph. Jacquier

J Low Temp Phys (2015), 179 (5) 390-395

Cavitation Density of Superfluid Helium-4 around 1 K

An Qu, Azer Trimeche, Jacques Dupont-roc, Jules Grucker and Philippe Jacquier

Phys. Rev. B (2015), 91, 214115 (2015)

An improved shielded RF transmit coil for low-frequency NMR and MRI

V.V. Kuzmin, C.P. Bidinosti, M.E. Hayden, and P.-J. Nacher

J. of Magn. Reson. (2015), 256, 70 –76

Dramatic effect of superfluidity on the collapse of ⁴He vapor bubbles

An Qu, Azer Trimeche, Philippe Jacquier and Jules Grucker

Phys. Rev. B (2016), 93, 174521

JOB OFFERS

2017 - Master / PhD

 

Quantum solid and superfluid helium

2016-2017 internship for Master student, with potential PhD:

Determining the Equation Of State of the metastable phases of condensed helium : Stimulated Brillouin scattering analysis.

More

2017 - Master / PhD

 

Polarised helium - Laser optical pumping

We offer several types of internship work for Master students, in connection with our study of laser optical pumping in helium plasmas: spectroscopy of metastable He dimers at 465 nm; study of the impact of collisional redistribution on the atomic 2³S-2³P optical transition; optimisation of rf discharges for optical pumping in He gas. This topic is open for PhD.

Read more

2017 - Master / PhD

 

Polarised helium - Low field MRI

Skilled and motivated students are welcome to join our investigations on low field MRI with laser polarised ³He gas or thermally polarised water. Work may focus on the impact of concomitant field gradients on image quality, or investigate the short-pulse limit and revisit the Bloch-Siegert effect in NMR. This topic is open for PhD.

Read more

2017 - Master

 

Polarised helium - Liquid NMR

Skilled and motivated students are welcome to join our investigations on liquid NMR in laser polarised ³He-⁴He dilute solutions. Work will deal with recently observed non linear NMR dynamics and focus on the comparison between experimental and numerical data. This topic is not (yet) open for PhD.

Read more

2017 - Post-doc

No specific position is open, sorry. However, talented young researchers with strong motivation and potential funding are encouraged to contact the Polarised Helium group.

We are always looking for brillant motivated scientists to join our group.

Check the open positions (see above) or send us your CV for application.

CONTACT

Lhomond

Département de Physique Ecole Normale Supérieure, 24 rue Lhomond, F-75231 Paris Cedex 05  

  •  Jules Grucker  : jules.grucker at lkb.ens.fr
  • Philippe Jacquier : philippe.jacquier at lkb.ens.fr
  • An Qu : an.qu at lkb.ens.fr
  • Franck Laloë : laloe at lkb.ens.fr
  • Pierre-Jean Nacher : nacher at lkb.ens.fr
  • Geneviève Tastevin : genevieve.tastevin at lkb.ens.fr

Nos Tutelles et Partenaires

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  • ens
  • phys ens
  • upmc
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  • univ evry