Short ShapingTime Tracker Performance

1
Short Shaping-Time Tracker Performance

• Rich Partridge and B.S. have made a crude
  estimate of SST tracker material burdens. Most
  hard info derives from Richs experience with the
  D0 upgrade project. We worried about
• Sensor thickness
• Data transmission lines
• Power cables
• Electronics and filtering
• Mechanical support

2
Estimating the Material Budget
Sensors Assume standard 300?m per layer ?
0.3 X0
Data Lines Two data in, two data out, bias, 5
clocks ? 10 data lines at 250 ?m per trace at
0.17 X0 trace thickness. Assume 5cm wide
ladder ? 5 fill factor ? average thickness of
0.009 X0 Add kapton, and x2 redundancy ? 0.1 X0
3
Estimating the Material Budget (contd)
Power ½ of 167cm ladder (power draw falls of
with distance) 20K channels assume 10A, and
no more than 0.02 ? for trace ? average X0 of
0.3 x2 since we need ground return ? 0.3
X0, but scales with (Nmodule-1)
Electronics 0.2 X0 (assumes bump bonding)
Mechanical Support 0.4 X0 number stolen
from D0.
4
Overall Material Budget
 
 
5
Performance of SST Tracker
In particular, how might SUSY and Higgs
reconstruc-tion compare be-tween SST and LD?
cos? 0
SST
?p?/p?2 (GeV/c-1)
(Note essentially no difference between three
scenarios for impact parameter resolution)
IDEAL LST
LD 3/01
p (GeV/c)