A Report from ACFA Linear Collider

Physics and Detector Working Group

For ACFA Plenary Meeting,

2 Feburary 2007

At Indore, India

Prepared by Akiya Miyamoto

Working Group TaskThe ACFA Linear Collider Physics and Detector Working group has been established since 1998 in response to the ACFA statement. The group has organized workshops and published the report in 2001 which elucidates physics scenario and experimental feasibilities at the linear collider. These activities leaded to the second statement on the e+e- collider issued by ACFA, and ACFA Linear Collider Steering Committee (ALCSC) has been formed to further promote the linear collider project. Under the ALCSC, our group has been transmuted to the sub-group on the linear collider physics and detectors, and Contact persons of the group have also been re-created.

Our task is to continue studies on physics at the linear collider more precisely and more profoundly, taking into account progresses in our field, as well as on developments of detector technologies best suited for the linear collider experiment. As we know from past experiences, this will be enormously important to realize the linear collider.

1 August 2003

From http://acfahep.kek.jp/WG

Joint 9th ACFA and GDE Workshop Feb. 4 -7, IHEP, Beijing http://bilcw07.ihep.ac.cn/ Held jointly with GDE Program see next page

– Release of ILC RDR and DCR (Detector Concept Report)

– Discuss activities on ILC Physics and Detectors, including plans for coming years

Open/Close sessions of International Review Committee for ILC tracking ( Organized by R&D panel of WWS ) are held in 2nd/3rd day

So far, about 170(60) participants outside (inside) China are registered for ACFA and GDE

About 26 ACFA ( GDE+ACFA ) plenary talks and about 50 parallel talks

Feb. 4 Morning Joint ACFA GDE Plenary

Afternoon ACFA Plenary

Feb. 5 Morning TrackingReview

Physics Simulation/Reconstructio

n

Afternoon

TrackingReview

MDI/Magnet

Colloquium

Feb. 6 Morning Tracking Review

Closed

Calorimeter/Muon/DAQ

Vertex/Tracking

Afternoon

Tracking Review

Closed

Calorimeter/Muon/DAQ

Vertex/Tracking

MDI/Magnet

Feb. 7 Morning ACFA Plenary (Summary)

Afternoon Joint GDE ACFA Summary

Program (ACFA part)

Detector Concept Report (DCR) DCR is a document accompanied to the ILC RDR DCR consists of Physics and Detector chapters

– EditorsPhysics: 1 exp.+1theory/region

Abdelhak Djouadi, Joe Lykken, Klaus Monig, Yasuhiro Okada, Mark Oreglia and Satoru Yamashita

Detector: 1/region + detector R&D panel John Jaros, Ties Benke, Akiya Miyamoto, C.J.S.Damerell

Detector DCR describes– Challenges of detector performance, concepts,

MDI issues, detector technologies, performances, 2 detector issues, options, cost, future step, …

A very preliminary document is available at http://www.linearcollider.org/wiki/doku.php

Feed back from the society and refinements are planed after 9th ACFA Workshop

Roadmap after DCR After the RDR, GDE intends to prepare an EDR document

for 2010 WWS has started to define its own roadmap in conjunction

with ILCSC Objectives include

– Remain in phase with the GDE to start the construction of detectors in parallel with the construction of the machine

– Make it possible to start physics 8 years after the beginning of the construction of the machine

EDR ready for 2 Detectors in 2010-2011 which needs an intense technical effort starting early 2009

We will discuss the issue and a process to guide us at the plenary session of 9th ACFA Workshop

Progresses on ILC Detector R&D

•Simulation studies•Calorimeter•Main Tracker:TPC•Inner Silicon Tracker•Vertex Detector

Simulation Studies Studies of performance of GLD,

based on Geant4 Detector simulators and

reconstruction codes are developed

– Kalman track fitter for studies of tracking performance

– Particle Flow studies– Studies of beam induced

backgrounds/effects to detector performance

( , , )Z qq u d s

Background simulation by Jupiter

FCALBCAL

CH2MaskGLD geometry in Jupiter

Reconstructed jet energy resolution almost reaches the goal: ~30%/sqrt(E)

cos jet

R&D on Scintillator based Calorimeter

Extruded and covered by TiO2

•Studying scintillator and photon sensors by GLD-CAL group: Kobe, Niigata, Shinshu, Tokyo, Tsukuba (jp), KNU (kr), JINR(rs)

•Beam tests are scheduled at DESY/FNAL in 2007~2010 with CALICE group R&D's are becoming inter-regional

GLD-CAL meeting at Kyungpook Nat. Univ.(Korea), Aug. 2006

KNU strip w/o TiO2

KNU strip w TiO2

Kuraraytile

Kuraray Mega strip plate

Photon sensors:MPPC's by HPK are under test

Main Tracker:TPC TPC with read out by Micro Pattern Gaseous

Detector is studied R&D Issues:

– Choice of Chamber gasses– Effects of Ion build-up, Ion feedback– Field non-uniformity, Calibration methods– Beam backgrounds

From analysis of beam test data,terms affect spatial resolution is understood

In order to demonstrate the full volume tracking in the non uniform magnetic field of PCMAG, beam tests by the best-at-present MPGD TPC candidates, achieving the expected resolution for LC TPC, are planed.

GEM membrane

This is a joint work of LCTPC international collaboration : Member institutes in Asia Tsinghua (China), Hiroshima, KEK, Kiniki, Saga, Kogakuin, Tokyo UA&T, Tokyo, Tsukuba (Japan), Mindanao US-IIT(Philippine)

PCMAG arrive at DESY

VTX

Inner Tracker Study by Korean GroupIT-Barrel

IT-Forward

>2 IT layers improveMomentum Resolution

Geant4 based simulation study

Si strip detectors and read out electronics are developed

AC TRK1P+width:200umAl wdth:220um

AC TRK2P+width:300umAl wdth:320um

DC TRK1P+width:400umAl wdth:420um

DC TRK2P+width:600umAl wdth:620um

Poly-Si Resists

PIN diode

Test patterns

AC typePitch:500umChannel:64

DC typePitch:1000umChannel:32

Test patterns

Test patterns

AC1

AC2 DC2

DC1

Test patterns

5-inch process

Beamtest and radiation damage testwere carried out using 35~45 MeV beam at Korea Institute of Radiological and Medical Science

Vertex Detector R&D ILC Vertex Detector consists of ~10 Giga pixels. Reading out

signals of 2820 bunches in 1msec, ILC vertex detector has to achieve the impact parameter resolution, IP, 5 10/(psin3/2) m.

GLD solution : – Fine Pixel CCD ( ~5x5m2pixels, fully depleted)– 3 super-layers, each consists of 2 layers = 6 layers in total

R&D issues: Resolution, Lorentz angle, charge spread, multi-port high speed readout

Setup to test charge spread

Vertex Detector sensor layout

Up coming events Joint GDE and 9th ACFA LC Workshop

– At IHEP, 4-7, Feburary, 2007

LCWS 2007– Hamburg, Germany, May 30-June 6, 2007– International Advisory Committee will be

formed soon, WWS OC + LOC of Past WS + theorist from each

region