Development of MQYY: A 90-mm NbTi Double Aperture Quadrupole Magnet for HL-LHC

Helene Felice (1) , Michel Segreti (1) , Damien Simon (1) , Jean Michel Rifflet (1) , Jean Marc Gheller (1) , Denis Bouziat (1) , Arnaud Madur (1) , Patrick Graffin (2) , Henri Salvador (2) , Jean Francois Millot (2) , Arnaud Foussat , Juan Carlos Perez , Nicolas Bourcey , Ezio Todesco , Lucio Fiscarelli , Olaf Dunkel , Jerome Fleiter , Fernando Toral , Pawel Krawcyzk , Isabel Bejar Alonso , Hector Garcia Gavela , Marcello Losasso

1 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers
2 DACM - Département des Accélérateurs, de Cryogénie et de Magnétisme (ex SACM)

In the context of the HL-LHC project, a NbTi double aperture quadrupole magnet called MQYY is being developed. This 90-mm-aperture quadrupole magnet has a magnetic length of 3.67 m and an operating gradient of 120 T/m at 1.9 K. Its development is done along two parallel paths: 1) the design, fabrication, and test of a short model; 2) the design and fabrication of two full-scale prototypes in industry within the H2020 EU Pre-Commercial Procurement project QUACO implemented by CERN, CEA, CIEMAT, and NCBJ. We report here on the short-model design choices the status of its fabrication and the preparation of the tests. In particular, we describe the magnetic and mechanical design relying on self-supporting collars, the protection aspects, the fabrication, and the cold test preparation. Finally, we present the unusual scheme of the QUACO project leading to the prototypes fabrication.

Mots clés: CERN LHC Coll; fabrication; quadrupole lens: design; magnet: superconductivity; niobium: titanium

Domaines: Physique des accélérateurs [physics.acc-ph]

Helene Felice, Michel Segreti, Damien Simon, Jean Michel Rifflet, Jean Marc Gheller, et al.. Development of MQYY: A 90-mm NbTi Double Aperture Quadrupole Magnet for HL-LHC. 25th International Conference on Magnet Technology, Aug 2017, Amsterdam, Netherlands. pp.4500105, ⟨10.1109/TASC.2018.2797941⟩. ⟨hal-01781988⟩