1. Novel Accelerator and Detector Systems
Roger Ruber
CAI Workshop
28 September 2007

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

3. 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
Sophisticated design work:
high strength G10 triangular support structure (sliding)
3D current & cryogenics feeding
pure Al-strip quench propagator
courtesy A. Yamamoto
Roger Ruber, CAI Workshop, 28 September 2008

4. Novel Accelerator Systems
Circular vs. Linear Collider
circular accelerator → synchrotron loss
higher acc. gradient → shorter linac
Power Production
klystron → maintenance cost
two-beam acceleration
Accelerating Gradient
superconducting → limit ~50 MV/m (Bc)
normal conducting → RF break down
CTF3 international test facility
power production & high gradient
cost
energy
Circular
Collider
Linear
drive beam
main beam
RF power
pulsed RF
power
source d RF
load
Electric field
RF wall currents
courtesy H. Braun
Roger Ruber, CAI Workshop, 28 September 2008

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

6. contact ruber@tsl.uu.se
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 …
contact
Roger Ruber, CAI Workshop, 28 September 2008