Agostino Lanza, on behalf of the APOLLO Collaboration C. Abbate(a,b), S. Baccaro(c,b), G. Busatto(a,b), M. Citterio(d), P. Cova (e,f), N. Delmonte(e,f), V. De Luca(a,b), S. Fiore(c), F. Giuliani(e), F. Iannuzzo(a,b), A. Lanza(f), S. Latorre(d), M. Lazzaroni (g,d), A. Sanseverino(a,b) , G. Spiazzi(h,i), F. Velardi(a,b) aDipartimento di Ingegneria Elettrica e dell’Informazione, University of Cassino and Southern Lazio, via Di Biasio 43, 03043 Cassino (Italy) bINFN Roma, p.le Aldo Moro 2, 00185 Roma (Italy) cENEA UTTMAT, via Anguillarese 301, 00123 Santa Maria di Galeria, Roma (Italy) dINFN Milano, via Celoria 16, 20133 Milano (Italy) eDipartimento di Ingegneria dell’Informazione, University of Parma,viale G.P. Usberti 181/A, 43124 Parma (Italy) fINFN Pavia, via A. Bassi 6, 27100 Pavia (Italy) gDipartimento di Fisica, Università degli Studi di Milano, via Celoria 16, 20133 Milano (Italy) hDepartment of Information Engineering, University of Padova, via Gradenigo 6/A, 35131 Padova (Italy) iINFN Padova, via Marzolo 8, 35131 Padova (Italy)

Aim of the Apollo project (1) Developing R&D to design the second generation of high and low power systems able to operate in the very hostile environment of the CERN Large Hadron Collider (LHC) major experiments (Atlas and CMS). The radiation requirements after the so-called phase 2 upgrade (2024 – 2035) will be, for different experimental zones: g-rays up to 4.5 kGy; hadrons up to 2 x 1013 h/cm2 (>20MeV); neutrons up to 7.7 x 1013 n/cm2, 1 MeV equivalent and the static B field will be: up to 2 T. Thermal conditions are critical as well. Power systems must not increase their external temperature by more than a few degrees (DT in Atlas < 3 degrees centigrades) in the worst case. Target of the project is the design of: High current/medium voltage DC/DC power converters (typically 100 A @ 24-48 V) Low current/low voltage Point of Loads (5 – 20 A @ 2 – 3 V) May 29th, 2014 Meeting with EPC - A. Lanza

Aim of the Apollo project (2) Possible applications, tailored on the present R&D, are: Atlas Liquid Argon (Lar) Calorimeters Atlas Muon detectors, in both Endcap and Barrel regions Health Physics, like NMR and accelerators for hadron-therapy The R&D activities included several GaN devices for bench tests, for tests under radiation and in B field. We are interested in this new technology because of: very good power performance fast switching intrinsic radiation hardness We have used up to now GaN devices with 40 V and 200 V Vds, but we would like to get new generation devices with increased Vds Apollo was active from 2010 up to 2013, following an initial R&D supported by the Italian Ministry of Education and Research (MIUR), and was budgeted by INFN. Now we are looking for other possible sources of budget May 29th, 2014 Meeting with EPC - A. Lanza