Introduction to Large/Huge Detector study. 10. Nov. 2004 @Kick-off meeting in 7 th ACFA LCWS in Taipei Y. Sugimoto KEK. Organization/Schedule.
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10. Nov. 2004
@Kick-off meeting in
7th ACFA LCWS in Taipei
improves momentum resolution
in the end-cap region where main tracker coverage is limited
SIT: s=7mm, 3 layers
VTX: s=3mm, 5 layers
Relatively low B-field of Large/Huge detector requires larger radius of the innermost layer Rmin (pair background)
Detailed simulation of background (pair b.g. and synchrotron b.g. ) is necessary to determine Rmin and beam pipe radius
R&D for thin wafer is very important to compensate for the degradation of I.P. resolution atlow momentum due to large Rmin
K-p separation by dE/dx of TPC has a gap in 0.9–2 GeV/c
TOF system with s=100ps can fill up the gap
1st layer of ECAL or additional detector ?
What is the physics case?Detector components
Somewhat thinner CAL (but still 6l), but does it matter?
Detector optimized for Particle Flow Algorithm (PFA)
Rin : Inner radius of Barrel ECAL
Z : Z of EC ECAL front face
(Actually, it is not so simple. Even with B=0, photon energy inside a certain distance from a charged track scales as ~Rin2)
Effective Moliere Length = Rm(1+xg/xa)
Gap : Sensor + R.O. elec + etc.
W : Rm ~ 9mm
Pb : Rm ~ 16mm
n is proportional to L if sampling pitch is constant
 GLD is a tentative name of the Large/Huge detector model.
All parameters are tentative.
(Barrel + Endcap)
(All parameters are tentative)
GLD is smaller than CMS
“Large” is smaller than “Compact”
K-p Separation (s)
e+e- ZH jets at Ecm=500GeV
GLC Parameter, B=4T