Couprie, M.-E. Benabderrahmane, C. Berteaud, P. Bielawski, S. Bourassin-Bouchet, C. Bouvet, F. Bozek, J.D. Briquez, F. Cassinari, L. Chapuis, L. Da Silva, J. Daillant, J. Davoine, X. Delerue, N. Dennetière, D. Devanz, G. Dietrich, Y. Diop, M. Dubois, A. Duval, J.P. El Ajjouri, M.E. El Ajjouri, T.K. El Khaldi, M. Evain, C. Garzella, D. Herbeaux, C. Hubert, N. Kaabi, W. Khojoyan, M. Labat, M. Lambert, G. Le Parquier, M. Leclercq, N. Lestrade, A. Loulergue, A. Lüning, J. Madec, C. Malka, V. Marchand, P. Marcouillé, O. Marlats, J.L. Marteau, F. Miron, C. Morin, P. Mosnier, A. Nadji, A. Nagaoka, R. Polack, F. Ribeiro, F. Ricaud, J.P. Rommeluère, P. Rousse, A. Roussel, E. Roy, P. Sharma, G. Szwaj, C. Tavakoli, K.T. Thaury, C. Thomasset, M. Tilmont, M. Tordeux, M.-A. Valléau, M. Vétéran, J. Wicek, F. Yang, W. Zerbib, D. WEP078 FEL laser electron operation plasma 2015 2015-12 LUNEX5 (free electron Laser Using a New accelerator for the Exploitation of X-ray radiation of 5th generation) aims at investigating compact and advanced Free Electron Laser (FEL). It comprises one one hand a 400 MeV superconducting linac for studies of advanced FEL schemes, high repetition rate operation (10 kHz), multi-FEL lines, and one the other hand a Laser Wake Field Accelerator (LWFA) for its qualification by a FEL application, an undulator line enabling advanced seeding and pilot user applications in the 40-4 nm spectral range. Following the CDR completion, different R&D programs were launched, as for instance on FEL pulse duration measurement, high repetition rate electro-optical sampling. The COXINEL ERC Advanced Grant aims at demonstrating LWFA based FEL amplification, thanks to a proper electron beam manipulation, with a test experiment under preparation. As a specific hardware is also under development such as a cryo-ready 3 m long undulator of 15 mm period is under development.