Novel Accelerator and Detector Systems Roger Ruber rubertsl

Novel Accelerator and Detector Systems Roger Ruber ruber@tsl. uu. se CAI Workshop 28 September 2007

Novel Detector Systems WASA ATLAS MEG Roger Ruber, CAI Workshop, 28 September 2008 2

ATLAS: How to Meet the Requirements? To provide high field while minimizing wall material • Develop high strength conductor Ni-doped Aluminium-stabilizer: – mechanical reinforcement while keeping quench stability • Integrate solenoid in common cryostat with LAr calorimeter courtesy A. Yamamoto • Sophisticated design work: – high strength G 10 triangular support structure (sliding) – 3 D current & cryogenics feeding – pure Al-strip quench propagator Roger Ruber, CAI Workshop, 28 September 2008 3

• Circular vs. Linear Collider – circular accelerator → synchrotron loss – higher acc. gradient → shorter linac cost Novel Accelerator Systems Circular Collider Linear Collider energy • Power Production – klystron → maintenance cost – two-beam acceleration drive beam RF p • Accelerating Gradient – superconducting → limit ~50 MV/m (Bc) – normal conducting → RF break down • CTF 3 international test facility – power production & high gradient main pulsed RF power source ower beam RF load Electric field RF wall currents d courtesy H. Braun Roger Ruber, CAI Workshop, 28 September 2008 4

RF Break Down • reliability issue – operation stability – beam stability (kick) • structure damage – conditioning to reach nominal – damage in high field areas 30 GHz © CERN • physics phenomena to be investigated – electron & ion currents, radiation (visible, UV, X-ray) – microscopy & DC break down © CERN Roger Ruber, CAI Workshop, 28 September 2008 5

Summary • Broad physics & engineering experience • Project management & collaboration with CERN, KEK & industry • Looking for collaborators in – particle & accelerator physics – material science & surface physics – electromagnetism – electronics – software & control – design, construction & engineering – … Roger Ruber, CAI Workshop, 28 September 2008 contact ruber@tsl. uu. se 6