a study of tracker resolution by satellite

A study of tracker resolution by Satellite

宮本彰也2008 年 6 月 4 日

ACFA-SIM-J meeting

B dependence of r

2Akiya Miyamoto, KEK

2 2 20

22

/

1/

r d eff drift

d eff

C N L

C NB

B: 3 4T, rf and Pt improves by 25% at High momentum

3Akiya Miyamoto, KEK

4Akiya Miyamoto, KEK

Geometry Dependence of K

5Akiya Miyamoto, KEK

<> is the avarage of of three geometry results

Costh dependence

6Akiya Miyamoto, KEK

7Akiya Miyamoto, KEK

8Akiya Miyamoto, KEK

9Akiya Miyamoto, KEK

10Akiya Miyamoto, KEK

Pt resolution at low momentum

11Akiya Miyamoto, KEK

gldapr08 gldprim j4ldc

before TPC 3.235 3.235 3.232

TPC Inner Support 2.086 1.98 1.98

TPC Drift 1.337 1.132 1.024

Accum. 6.689 6.378 6.239

TPC Lever arm(cm) 154.05 130.5 118

1/(B√L) 0.02686 0.025011

0.023014

Material thickness in unit of radiation lngth (%)

0

1/

Xp p

BL X

when multiple scattering dominates

j4ldc would be about 15% better than gldapr08 at low momentum if fiited by TPC onlySatellite fitting uses TPC+IT+VTX. Difference would be smaller

From http://ilcphys.kek.jp/soft/geom2/geantino/ScanSummary.htm

Backup

Control of TPC spatial resolution

If $SATELLITESROOT/macros/S4Macros.C is used, TPC spatial resolution formula can be selected by S4TPC.SpatialResolution. = flat: constant in rphi and Z = experimental: formula implemented by Yamaguchi san = ILD or ILDAuto: ILD formulardescribed by the previous page.

If ILD, q1 term is not scaled by Bfield. ILDAuto is default( Scaled by B)

JSF parameter name and default values. They are defined in $SATELLITES/macros/S4Macros.C p1=S4TPC.Sig00 [ 0.005 ] p2=S4TPC.Sig0SinDep [0.090] q1=S4TPC.SigLDep [ 0.00053 ]

r1=S4TPC.SigmaZ [0.040]

S4TPCHit::SetXXXXX can be used to set parameters.

13Akiya Miyamoto, KEK

About TPC Resolution

Formula suggested by TPC experts: Ron and KeisukeRef) Mail to ild-detector-optimization mailing list, 22-Feb-2008

14Akiya Miyamoto, KEK

[Tesla] Field Solenoid :B

[cm] length drift

height) pad 6mm for

:

:

)sin/22/(25/(

(00053.01:sin/41

09002),(005.01sin21

22

2122

222

2

L

NCd

)cmqBqQ

(cm).pcmpppP

QLP

eff

/

r

)(008.02),(04.01:21 2/1222 cmrcmrLrrZ

Control of TPC spatial resolution

If $SATELLITESROOT/macros/S4Macros.C is used, TPC spatial resolution formula can be selected by S4TPC.SpatialResolution. = flat: constant in rphi and Z = experimental: formula implemented by Yamaguchi san = ILD or ILDAuto: ILD formulardescribed by the previous page.

If ILD, q1 term is not scaled by Bfield. ILDAuto is default( Scaled by B)

JSF parameter name and default values. They are defined in $SATELLITES/macros/S4Macros.C p1=S4TPC.Sig00 [ 0.005 ] p2=S4TPC.Sig0SinDep [0.090] q1=S4TPC.SigLDep [ 0.00053 ]

r1=S4TPC.SigmaZ [0.040]

S4TPCHit::SetXXXXX can be used to set parameters.

15Akiya Miyamoto, KEK