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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 Task.

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a report from acfa linear collider physics and detector working group

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 task
Working Group Task

The 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 9 th acfa and gde workshop
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
detector concept report dcr
Detector Concept Report (DCR)
  • DCR is a document accompanied to theILC RDR
  • DCR consists of Physics and Detector chapters
    • Editors
      • Physics: 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
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
Progresses on ILC Detector R&D
  • Simulation studies
  • Calorimeter
  • Main Tracker:TPC
  • Inner Silicon Tracker
  • Vertex Detector
simulation studies

Background simulation by Jupiter




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

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

GLD geometry in Jupiter

r d on scintillator based calorimeter
R&D on Scintillator based Calorimeter
  • 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

Kuraray Mega strip plate

Extruded and covered by TiO2

GLD-CAL meeting at Kyungpook

Nat. Univ.(Korea), Aug. 2006

KNU strip w/o TiO2

KNU strip w TiO2


Photon sensors:

MPPC's by HPK are under test

main tracker tpc

GEM membrane

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.

PCMAG arrive at DESY

  • 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)
inner tracker study by korean group

5-inch process

Poly-Si Resists



Al wdth:220um



Al wdth:420um

Test patterns



Al wdth:320um



Al wdth:620um



AC type



DC type



PIN diode



Test patterns

Test patterns

Test patterns

Inner Tracker Study by Korean Group

Si strip detectors and read out

electronics are developed




Geant4 based simulation study

Beamtest and radiation damage test

were carried out using 35~45 MeV beam

at Korea Institute of

Radiological and Medical Science

>2 IT layers improve

Momentum Resolution

vertex detector r d
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, sIP, 5  10/(pb sin3/2q ) mm.
  • GLD solution :
    • Fine Pixel CCD ( ~5x5mm2pixels, 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
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