SMT Assembly & Rates, Take 2 (or 3?) Changes –Limited tents to Barrels 1&6, layers 1&3 (of 4)...
5
SMT Assembly & Rates, Take 2 (or 3?) • Changes – Limited tents to Barrels 1&6, layers 1&3 (of 4) – Used Yuri’s tent numbers in addition to nominal tolerance – Calculated for z = 22 cm as well as z = 30 cm • Will show – pass rate for nominal tolerance – efficiency at fixed rate (nominal) – Plots over range of “nominal” for p T =1.5 GeV (have 3, infinite)
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Transcript of SMT Assembly & Rates, Take 2 (or 3?) Changes –Limited tents to Barrels 1&6, layers 1&3 (of 4)...
SMT Assembly & Rates,Take 2 (or 3?)
• Changes– Limited tents to Barrels 1&6,
layers 1&3 (of 4)– Used Yuri’s tent numbers in
addition to nominal tolerance
– Calculated for z = 22 cm as well as z = 30 cm
• Will show– pass rate for nominal tolerance– efficiency at fixed rate
(nominal)– Plots over range of “nominal”
for pT=1.5 GeV (have 3, infinite)
For calibration, consideran analytic case
• Assume gaussian, =1, but in reality different
• Make a cut at 2.0, and integrate outside.
• Make ratio, R, of areas for true over =1.0.
• Trigger increase is R3
Trigger Rate R Increase 1.01 1.05 1.2x 1.05 1.25 1.7x 1.10 1.50 3.4x
pT
Det
.
Bac
kgro
und
R
el. T
rigg
er
IP C
ut
Eff
i/
E
ffi/
(GeV
) C
onfi
g
Pas
s F
rac(
%)
R
ate
Incr
ease
(mic
ron)
Tk(
%)
Evt
Ide
al
4.5
=
1.0
6
8
7
6
68%
N
omin
al
10
(10/
4.5)
^3 =
11
86
7
2
61%
Dis
tor.
14
(
14/1
0)^3
= 2
.7
100
68
53
%
3.0
Ide
al
4.
5
76
7
4
64%
N
omin
al
9
8
94
69
55
%
D
isto
r.
1
2 [1
1]
2.4
[1.8
]
110
65
47
%
1.5
Ide
al
4.5
9
6
7
6
53%
N
omin
al
7
.5
4.6
1
08
6
6
49%
Dis
tor.
1
0.[9
.3]
2
.4 [
1.9]
1
20
6
3
44%
Res
ults
for
30
cm B
eam
Spo
t
(T
rigg
er: 3
trac
ks, S
>2)
[] in
dica
te d
iffe
rent
see
d to
geo
met
ry m
otio
ns
pT
Det
.
Bac
kgro
und
R
el. T
rigg
er
IP C
ut
Eff
i/
E
ffi/
(GeV
) C
onfi
g
Pas
s F
rac(
%)
R
ate
Incr
ease
(mic
ron)
Tk(
%)
Evt
Ide
al
4
.5%
7
0
7
6%
69%
N
omin
al
10
1
1x
8
4
7
2
61
Dis
tor.
1
1
1.3?
?
86
7
1
60
3.0
Ide
al
4
.5
7
0
7
6
69
N
omin
al
8
6
80
7
4
63
Dis
tor.
1
0
2
8
2
7
3
62
1.5
Ide
al
4
.5
70
77
70
Nom
inal
7
4
75
75
67
D
isto
r.
9
2
77
74
65
Res
ults
for
22
cm B
eam
Spo
t
(T
rigg
er: 3
trac
ks, S
>2)
Continuous Variationin “Nominal”
Nominal End-to-End Offset Width( m m)0 50 100 150 200 250
ChangeinPass
Fraction
0
1
2
3
4
5
6
Relative to idealRelative to ideal, Barrels 1+6 bad.Relative to Nominal, Barrels 1+6 bad.
Rotation about ladder measurment direction
z = 30 cm
pT=1.5 GeV Tracks
Nominal End-to-End Offset Width( m m)0 50 100 150 200 250
ChangeinPass
Fraction
0
1
2
3
4
5
6
Relative to idealRelative to ideal, Barrels 1+6 bad.Relative to Nominal, Barrels 1+6 bad. z = 22 cm
Rotation about ladder measurment direction
Nominal nominal
