Introduction to Linac4 Structure, schedule and goals of the Technical Design Report Maurizio Vretenar AB/RF

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Introduction to Linac4Structure, schedule and
goals of the Technical Design ReportMaurizio
Vretenar AB/RF
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Linac4

• Linac4 (160 MeV, H-) is intended to replace
  Linac2 as injector to the PS Booster.
• It will double the brightness and intensity out
  of PSB (higher energy H- injection).
• Is the basis for all LHC upgrade scenarios.
• In a second stage (gt2010), could become the
  front-end of the SPL, a high-energy, high
  intensity linac replacing the PSB.
• Medium-size project (50-60 MCHF), reusing part
  of the RF equipment from LEP, to be built in the
  period 2007-10.
• Support by the DG for a decision on construction
  at end 2006.

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From SPL to Linac4

• The SPL (Superconducting Proton Linac) study of a
  large (3.5 GeV) SC linac replacing Linac2 and PSB
  is going on since 1997.
• Large project (gt550 MCHF), decision is expected
  from 2010. Conceptual Design Report just
  finished, limited work foreseen for the period
  2006-2010.
• The normal-conducting front-end of the SPL was
  first proposed as an injector for the PSB in 2001
  and called Linac4.
• In the period 2001-06
• General and beam dynamics design
• RD and prototyping of Linac4 structures
• Design and construction of the Linac4 3 MeV
  injector
• RD work integrated in a EU Activity (HIPPI),
  with support from Russia (3 ISTC projects)
  and India.

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Linac4 basic design
Linac4, a new 160 MeV H- injector for the PS
Booster
Cell Coupled Drift Tube Linac prototype (40 MeV,
external quads) built at CERN, tuned, to be
tested with RF power
The 3 MeV test stand in preparation in the PS
South Hall (source RFQ chopper line)
Drift Tube Linac tank 1 prototype (3-10 MeV,
permanent quad focusing) design finished, in
construction at VNIIEF (Ru)
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Linac4 design features

• Linac4 is designed for the high duty cycle
  required by the SPL (10) but in the first stage
  will operate for the PSB only at 0.1 duty cycle
  (2 Hz, 500 ms).
• Natural location for Linac4 is the PS South
  Hall (about 100m space available, possible
  connection to PSB next talk) but in the case
  of SPL construction it will have to be moved to
  another location the linac will be built for
  high duty cycle operation, but all the
  infrastructure (including most power supplies ?)
  will be dimensioned only for low duty.
• Result is that Linac4 will be overdimensioned
  for beam loss, beam dynamics, thermal and RF
  problems, but needs to have a reliability as
  high as the present Linac2 (98 availability)

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Linac4 layout in South Hall
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Linac4/SPL beam parameters
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Linac4 Schedule

• Tentative schedule
• 2006 Continuation of RD preparation of test
  stand.
• 2006 (end) Linac4 Design Report (design frozen).
• 2007 Detailed design (execution drawings!),
  definition of construction strategy,
  attribution of contracts
• 2008-09 Construction
• 2010 End of installation and commissioning
• From the point of view of use of CERN resources,
  it goes in the wake of LHC.

Estimate of financial needs (kCHF) for the period
2007-10
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Responsibilities

• General coordination of all proton linac
  activities R. Garoby
• Linac4 coordination M. Vretenar
• (includes editing of Linac4 TDR and
  coordination of EU collaboration)
• Coordination for 3 MeV test stand C. Rossi
• SPL/Linac4 coordination committee (core team)
  R. Garoby, F. Gerigk, K. Hanke, A. Lombardi,
  C. Rossi, M. Vretenar.
• Linkpersons are being nominated by the different
  groups.

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Technical design committee meetings

• The idea is to have general coordination
  meetings aiming at the TDR, about 1/month from
  now until the end of the year (duration should
  not exceed 1 hour!).
• Goal coordinate the overall design and the
  writing with the different groups
• The meeting should consist in short technical
  presentations a tour de table on general
  problems.
• Is the date-time convenient to all ? (Tuesday
  morning conflict with ABOC at 1000,
  alternatives Tue 1400, Thu 1100 or Thu 1400).
• In parallel, SPL meetings (every 1 or 2 months)
  for more general subjects and 3 MeV Technical
  Committee meetings (1/month) for detailed
  technical subjects concerning the test stand.
• A separate working group will analyse in detail
  the problems of PSB injection (coordination K.
  Hanke).

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The Technical Design Report (TDR)

• Based on the design work done, integrated with
  technical descriptions of all components.
• Will rely on what has been already written for
  the SPL Conceptual Design Report authors who
  have already provided their contribution to SPL
  CDR2 will be asked only to revise and complete
  their contribution.
• Every section has a coordinator, who is free to
  ask support from other colleagues.
• The TDR will be the basis for a cost estimate,
  which will be published afterwards, as a
  separate document.
• Goal of the TDR show to the management that we
  have a sound design, and give them a good
  estimation of schedule and resources.