novel accelerator and detector systems · 9/28/2007 · astromag (al-si) ssc/sdc (al-zn/si)...
TRANSCRIPT
Novel AcceleratorNovel Acceleratorandand
Detector SystemsDetector Systems
Roger RuberRoger [email protected]@tsl.uu.se
CAI WorkshopCAI Workshop28 September 200728 September 2007
2Roger Ruber, CAI Workshop, 28 September 2008
Novel Detector Systems
MEG
WASA
ATLAS
3Roger Ruber, CAI Workshop, 28 September 2008
To provide high field while minimizing wall material
• Develop high strength conductorNi-doped Aluminium-stabilizer:
– mechanical reinforcement whilekeeping quench stability
• Integrate solenoid in commoncryostat with LAr calorimeter
• Sophisticated design work:– high strength G10 triangular
support structure (sliding)– 3D current & cryogenics feeding– pure Al-strip quench propagator
ATLAS: How to Meet the Requirements?
0
50
100
150
200
1975 1980 1985 1990 1995 2000 200
Yie
ld S
treng
th [
MP
a]
Year
(Pure-Al)
ASTROMAG(Al-Si)
SSC/SDC(Al-Zn/Si)
LHC/ATLAS(Al-Ni)
BESS-Polar(Al-Ni)
Ordinal Copper
courtesy A. Yamamoto
4Roger Ruber, CAI Workshop, 28 September 2008
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
CircularCollider
LinearCollider
drive beam
main beam
RF power
pulsed RFpowersource
d
RF load
Electric fieldRF wall currents
courtesy H. Braun
5Roger Ruber, CAI Workshop, 28 September 2008
• 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
RF Break Down
©© CERNCERN30 GHz30 GHz
©© CERNCERN
6Roger Ruber, CAI Workshop, 28 September 2008
Summary
• Broad physics & engineering experience
• Project management & collaborationwith CERN, KEK & industry
• Looking for collaborators in– particle & accelerator physics– material science &
surface physics– electromagnetism– electronics– software & control– design, construction & engineering– …