kek data analysis carleton-tpc (ar/ic4h10)(95/5) (ar/cf4)(95/5) (ar/ch4)(95/5) @ b = 1t &...
TRANSCRIPT
KEK data analysisCarleton-TPC
(Ar/iC4H10)(95/5)(Ar/CF4)(95/5)(Ar/CH4)(95/5)
@ B = 1T &
(Ar/CO2)(90/10) @ B = 0T
~ 0° & 4 GeV/c +
Gas choice / motivation 2
VD = 36.87 m/ns
CD = 102 m/cm1/2
E = 50 V/cm
E = 50 V/cm
E = 120 V/cm
CD = 57.15 m/cm1/2
VD = 56.07 m/ns
E = 120 V/cm
Gas choice / motivation 3
E = 300 V/cm
E = 300 V/cm
VD = 22.75 m/ns
CD = 223 m/cm1/2
VD = 26.73 m/ns
CD = 125.74 m/cm1/2
E = 70 V/cm
E = 70 V/cm
Track display 4
Row 2
Row 3
Row 4
Row 5
Row 6
Row 7
Row 8
Row 9
Row 1
+ track
~ 0°
X
YPad # Channel #
Pulses / CF4 5
X
YBad pulse
1 bad channel pulse!!
128 channel pulses
Origin??
Beam profile (X direction) 6
Ar/iC4H10:95/5 Ar/CH4:95/5 Ar/CO2:90/10Ar/CF4:95/5
Beam profile (Z direction) 7
Ar/iC4H10:95/5 Ar/CH4:95/5 Ar/CO2:90/10Ar/CF4:95/5
Global timing 8
Ar/iC4H10:95/5
VD = (24.92 / 26.73) m/ns VD = (20.13 / 22.75) m/ns
Ar/CO2:90/10
Ar/CF4:95/5
VD = (56.07 / 61.37) m/ns
Ar/CH4:95/5
VD = (36.51 / 36.87) m/ns
# < 12%
MagboltzData
11% CO2?P = 1.1 atm?
Overflow events 9
Ar/iC4H10:95/5
Ar/CH4:95/5
Ar/CO2:90/10
Ar/CF4:95/5
good events
saturated events 45%!!
Events with one saturated pad
Overflow events / iC4H10 10
Ar/iC4H10:95/5
good events
saturated pads 45%!!
Saturated rows / at least 1 saturated pad
After recovering 1 saturated row -> 16% lost
Row amplitude (max. amplitude in a row)11
Ar/iC4H10:95/5
Ar/CH4:95/5
Ar/CO2:90/10
Ar/CF4:95/5
Pad Response Function 12
44
22
44
22
1
1
xbxb
xaxaPRF
),,,,( baxPRF
)1()/2(2 22 aa
aa 44 )/2(
42
22 2)1(21)/2( aabb
bb 44 )/2(
PRF / Ar/iC4H10:95/5 13
Z=0.5cm Z=1.0cm Z=1.5cm
Z=6.5cm Z=7.0cm Z=7.5cm
PRF / Ar/iC4H10:95/5 14
Z=8.0cm Z=8.5cm Z=9.0cm
Z=14.0cm Z=14.5cm Z=15.0cm
PRF / FWHM2 15
Ar/iC4H10:95/5
Ar/CH4:95/5
Ar/CO2:90/10
Ar/CF4:95/5
CD = 102 m/cm1/2CD = 57.15 m/cm1/2
CD = 223 m/cm1/2CD = 125.74 m/ cm1/2
??
OK OK
Angle fit 16
Ar/CH4:95/5
= 0.35º
Ar/iC4H10:95/5
= 0.30º
Ar/CF4:95/5
= 0.57º
Ar/CO2:90/10
= 0.37º
/ rad / rad
Angle fit 17
Ar/iC4H10:95/5 Ar/CO2:90/10
Ar/CF4:95/5 Ar/CH4:95/5
= 0.9º
= 14º
= 1.34º
= 2.30º
/ rad / rad
Bias / its origin? (scale: +/-150m) 18
Ar/iC4H10:95/5 Ar/CH4:95/5 Ar/CO2:90/10Ar/CF4:95/5
2
3
4
5
6
7
8
X resolution = f(Z) 19
Ar/CO2:90/10
Ar/CF4:95/5 Ar/CH4:95/5
Ar/iC4H10:95/5
X resolution = f(Z) / iC4H10 20
Old New
New Old: with 55% of the events
New: with 84% of the events (after recovering events with
1 saturated pad)
Comparison beam-cosmic 21
Ar/CO2:90/10
BeamCosmic