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Long Fruitful collaboration between DESY and Japanese institutes On High energy physics. Initiated by professor Masatoshi Koshiba since 1973. ZEUS at HERA 1992-. DASP at DORIS 1973-. LHC 2009-. JADE at PETRA 1976-. Katsuo Tokushuku KEK.

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slide1

Long Fruitful collaboration

between DESY and Japanese institutes

On High energy physics

Initiated by professor Masatoshi Koshiba since 1973

ZEUS at

HERA 1992-

DASP at DORIS 1973-

LHC 2009-

JADE at PETRA 1976-

Katsuo Tokushuku

KEK

slide2

ATLAS Detector: construction and commissioning

  • Superconducting Central Solenoid (Japanese contribution:100%)
  • End-cap muon triggering system (TGC) (~50%)
  • Silicon microstrip tracking system (SCT) (~20%) <- collaboration with DESY
  • Trigger (Muon/Tau HLT)
  • Tracking (||<2.5, B(solenoid)=2T):
  • -- Si pixels and strips
  • -- Transition Radiation Detector (e/ separation)
  • Calorimetry (||<5):
  • -- EM : Pb-LAr
  • -- HAD: Fe/scintillator (central), Cu/W-LAr (fwd)
  • Muon Spectrometer (||<2.7) :
  • air-core toroids with muon chambers

Length : ~ 46 m

Radius : ~ 12 m

Weight : ~ 7000 tons

~ 108 electronic channels

~ 3000 km of cables

slide3

ATLAS-KEK (active) members Updates from last year

  • K. Tokushuku (Leader, HLT)
  • TGC H. Iwasaki, (M. Ishino left to Kyoto) <- new open position
  • TGC LVL-1 (+ upgrade) Trigger O. Sasaki + 1 student + 1 student
  • SCT (+upgrade(pixel/strip))
  • Y. Unno, S. Terada, Y. Ikegami, Y. Takubo (IBL) + 1student(graduated)
    • (J. Tojo left to Kyushu) K. Nakamura
  • HLT K. Nagano(muon), S. Tsuno(tau)
  • Physics
    • S. Tsuno,K.Nakamura ( Tau )
    • K. Nagano ( W+c , etc.) + 3 students
    • J. Kanzaki (Top) + 1 student (graduated)
  • Generators
    • J. Kanzaki (Madgraph on GPU), S. Odaka (gamma gamma; GRACE)

permanent staff only (+ few students)

No post-docs!

-> Close collaboration with JP universities

some highlights from kek atlas muon trigger activities
Some highlights from KEK-ATLAS muon trigger activities

Better performance if we can get information from small wheel.

-> Phase 0 : Add Small-wheel TGC information in the trigger logic.

-> Phase 1: Use the new small wheel information

kek atlas activities on muon trigger upgrade
KEK-ATLAS activities on Muon Trigger Upgrade
  • Phase 2: R&D studies for Level-1 Muon trigger by usingMonitored Drift Tubes (precision chambers)
kek atlas activities on hlt
KEK-ATLAS activities on HLT
  • L1 Tau trigger improvement: with topological trigger -> S. Tsuno
  • HLT muon: -> K. Nagano.

Re-structuring the LVL2 Muon trigger with more transparent

and modular software framework.

-> easier for the collaboration with several groups (UK, US)

slide9

ATLAS detector upgrade plan

2015

2016

2017

2018

2019

2020

2021

2022

2023

2024

  • Phase 1 minor upgrade:
  • An additional pixel layer
  • Replacement of Inner Endcap
  • muon chambers

toward design luminosity

14TeV -1x1034 cm-2s-1

ultimate design luminosity

1-2x1034 cm-2s-1

High-Luminosity LHC

5x1034 cm-2s-1

Phase 2: Major upgrade:

Complete replacement

of the inner trackers

(All-silicon tracker)

R&D activities in Japan

  • R&D of radiation- tolerant sensors
  • Development of short strip detector module
  • R&D of pixel sensors
  • development of muon and combined triggers.

Good collaboration with DESY and German

institutes is essential

activities on accelerator upgrade
Activities on accelerator upgrade
  • KEK is contributing to the R&D for the two key technologies:
    • High-field magnet for the IP regions
    • High-power injector
  • in close collaboration with CERN and the other labs
hl lhc
HL-LHC
  • LuminosityLeveling: various options
    • Crab crossing
    • β*leveling

Replace the forcusing magnets around ATLASand CMS.

And upgrades for LHC injectors.

lhc injector
LHC Injector

LHC

SPS

ATLAS

PS booster

PS

RF Amplifiers:

Possible KEK conributions

LINAC4 (2018)

Magnetic arroys in the RF cavity. (developed at J-PARC)

slide13

Very fruitful collaboration with CERN

J-PARCneutrino beamline

LHCmagnets

PSB: cavities

J-PARCRF cavities

slide14

International collaboration has started for the design work of the magnet system

~300m

Epoxy

(G10)

CE

BT

BMI

D1: KEK

Q1-3:

US-LARP(Nb3Sn) or

CERN(NbTi)

D2: BNL

Q4-6:

CEA/Saclay

JAEA Takasaki

Cryogenic γ-ray

irradiation Facility

14

Radiation test at J-PARC

Challenges:

Large aperture (φ130~150mm) 6 Tesla magnet: saturation, flux leakage

High radiation dose: selections of rad-hard materials

slide15

International collaboration has started for the design work of the magnet system

~300m

D1: KEK

Q1-3:

US-LARP(Nb3Sn) or

CERN(NbTi)

D2: BNL

Q4-6:

CEA/Saclay

Last year

Latest design

slide16

Toward the futherLHC upgrade

Nb3Al has better performance then Nb3Sn

at the high stress condition. (But now it turned out that R&D took longer. -> R&D for HE-LHC)

Nb3Al cable produced by NIMS-KEK

collaboration.

summary
Summary
  • In the ATLAS collaborations, KEK is responsible for TGC, Endcap LVL1 muon trigger, SCT and HLT.
  • For ATLAS upgrade, KEK is working for LVL1 muon trigger upgrade and tracker upgrade.
  • R&D for the silicon trackers (strips and pixels) are the most important activity in the next several years. In this area, a lot of collaboration between KEK and DESY are possible and plausible.
  • KEK-CERN collaboration on the LHC accelerator upgrade is in place.