1. Introduction and Meeting Objectives
Akira Yamamoto
Presented at
ILC-TOT 3-day Meeting at CERN
29 Feb. – 2 March, 2016

2. ILC Acc. Design Overview (in TDR)
Damping Ring
e- Source
e+ Main Liinac
Physics Detectors
Item
Parameters
C.M. Energy
500 GeV
Length
31 km
Luminosity
1.8 x1034 cm-2s-1
Repetition
5 Hz
Beam Pulse Period
0.73 ms
Beam Current
5.8 mA
Beam size (y) at FF
5.9 nm
SRF Cavity G. Q0
31.5 MV/m
Q0 = 1x10 10
e+ Source
e- Main Linac
Key Technologies
Nano-beam Technology
SRF Accelerating Technology
A. Yamamoto,

3. Technical Highlights after TDR (2013 ~)
SRF : R&D goal for CM Gradient, 31.5 MV/m
E-XFEL: Completed 100 % of 800 cavity production, and 70 % of 100 cryomodule assembly and tests, Usable gradient nearly reaching 30 MV/m (Excellent !!)
Fermilab-ASTA: reached Cryomodule (8-cavity string) av. gradient of > 31.5 MV/m
KEK-STF2: CM1+2a (12 cavity string) reached av. Gradient of 31 MV/m
Nano-beam : R&D goal for FF beam size at ATF, 37 nm
ATF2 Collab.: reached 44 nm at the FF
CFS
Geological Survey & boring at a candidate IP region in progress in Tohoku
Tunnel Optimization Tool (TOT) being developed by CERN/KEK-ARUP cooperation
Accelerator Design and Integration (ADI)
Post-TDR design update ( see The ILC Progress Report 2015)
Common L* for both detectors of ILD and SiD
Vertical access at Detector Hall at IR points
Extension of ML tunnel length for optimizing e+e- collision timing and redundancy of ML SRF
A. Yamamoto,

4. ILC Site Candidate Location in Japan: Kitakami
Preferred site selected by JHEP community,
Endorsed by LCC, in 2013
High-way
Oshu
Express-
Rail
Ofunato
Kesen-numa
Sendai
Ichinoseki
IP Region
A. Yamamoto,

5. ILC-TOT 3 Days Meeting at CERN
T. Sanuki
ILC-TOT 3 Days Meeting at CERN

6. ILC-TOT 3 Days Meeting at CERN

7. ILC-TOT 3 Days Meeting at CERN

8. ILC-TOT 3 Days Meeting at CERN

9. ILC-TOT 3 Days Meeting at CERN

10. ILC Accelerator Layout in TDR
　　Sanuki Report:
16/01/07
LC計画推進室からの報告

11. ILC Accelerator Layout, in TDR, and
Alternate Options still to be investigated

12. Consideration on ML Tunnel Access: A
North
e+(e-)
Access Hall
ML cross section from South to North
Good for installation
South
e-(e+) RF BT
Good for maintenance
ILC-TOT 3 Days Meeting at CERN

13. ILC-TOT 3 Days Meeting at CERN
Access Hall
Latest Proposal Plan of the Entrance Hall
Section A-A
Entrance Hall
- During Construction: Tunneling work passage
- After completion: Air Duct, Smoke extraction path
← Access Tunnel
Hoist Crane
Entrance Hall
Entrance Haｌｌ
EH Cross-section
Entrance Hall BT
Section A-A
ILC-TOT 3 Days Meeting at CERN

14. Design Update Realized
Title
Contents
Decision
CR-001
Add return dogleg to target by-pass
Add additional lattice to bring BDS beamline on axis with main linac, to accommodate future >1 TeV beam energies. No
CR-002
Adopt equal L* for both detectors
Find solution for single L* value for BDS and both detectors
Yes
CR-003
Detector hall with vertical shaft access
Consolidated solution for IR hall / layout which supports surface construction of the detectors.
CR-004
Extension of the electron and positron Main Linac tunnels by ~ 1.5km
Lengthen Main Linac tunnels by about 1.5km, to (i) fulfill the Global Timing constraint and (ii) add margin for total beam energy of 500GeV CME, w/ very reliable reach
CR-005
Update top-level parameters
Correct errors in reported luminosity for 500 GeV baseline and 1 TeV (b) parameters.
CR-006
Add BPM downstream of QD0
Add a BPMs immediately downstream of the QD0s to facilitate beam capture and construction of a "virtual IP BPM".
CR-007
Adoption of the Asian design as sole baseline
Only the Asian version of the TDR designs will be the basis for further development; the baseline HLRF distribution scheme will be DKS, the CFS planning will be based on the mountainous topography design.
CR-008
Formal release TDR-2015a lattice
Complete set of matched lattices reflecting TDR design
A. Yamamoto,

15. CR 3: Vertical shaft access to the detector hall at IP

16. CR 4: Adding ML tunnel lengths
for both e+e- timing and more reliable reaching 500 GeV

17. ILC-TOT 3 Days Meeting at CERN
CFS Agenda towards ECWS2016
Subject
Change Contents
Review Items
ML Tunnel Cross-section
Shielding conditions：
Central wall thickness /3.5m→1.5ｍ
RF service Gallery: RF Components layout
Beam Tunnel: Cryomodule transport
Connecting Passage (BT-RF)
Arrangement of the supply lines(CFS)
Access Hall
(Entrance hall)
Install method:
- Underground facilities
- Surface facilities
Confirmation of Installation method
-Access route, -Transport vehicle
Access Hall Configuration
-Underground Cavern, Shielding Door equipment
Cryogenics Cavern
Components Layout：
Main components
-Cold Box (4K?), -Compressor, -He & N2 Tank
Facility scale & Location
-Dimension: Underground Cavern, Building
-Supply Facilities: Cable, LCW, CHW, Ventilation
BDS Tunnel
Cross-section
Beamline Configuration：
-Win tunnel ? or
Single tunnel ?
Equipment layout and critical function
-Beam source, -Beam delivery system,
-Beam damp system, -Cryogenics system,etc.
Tunnel cross-section & Supply service
ILC-TOT 3 Days Meeting at CERN