Linac based proton driver
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LINAC-BASED PROTON DRIVER. Introduction SPL+PDAC example Elements of comparison Linacs / Synchrotrons. Introduction.

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LINAC-BASED PROTON DRIVER

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Linac based proton driver

LINAC-BASED PROTON DRIVER

Introduction

SPL+PDAC example

Elements of comparison Linacs / Synchrotrons


Introduction

Introduction

All proton driver begin with a linear accelerator. In a Linac-based driver, all acceleration is done in the Linac. However a fixed energy synchrotron is still needed for accumulation and bunch compression.

At low energy, it makes sense to only accelerate in a linac. Progress in sc resonators are reducing cost. However, at high energy (>5-8 GeV ?), a linac will anyhow be too costly.

  • What is the limit energy for selecting acceleration in the synchrotron ?

  • Other arguments ?

2


Spl pdac 1 3

SPL & PDAC [1/3]

SPL (CDR2) characteristics

3


Spl pdac 2 3

SPL & PDAC [2/3]

SPL main goals:

  • increase the performance of the CERN high energy accelerators (PS, SPS & LHC)

  • address the needs of future experiments with neutrinos and radio-active ion beams

The present R&D programme concentrates on low-energy (Linac4) items, wherever possible in collaboration with other laboratories.

4


Spl pdac 3 3

SPL & PDAC [3/3]

SPL (CDR2) + PDAC characteristics

[Extrapolation from PDAC based on the SPL CDR-1]

5


Elements of comparison 1 2

Elements of comparison [1/2]

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Elements of comparison 2 2

Elements of comparison [2/2]

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Linac based proton driver

To be continued …

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Linac based proton driver

ANNEX

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Cost comparison

Cost comparison

Cost

Energy

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Spl cdr2 baseline

SPL - CDR2 baseline

  • RF

  • 704 MHz bulk Niobium cavities

  • 3 families of cavities : beta =0.5,0.85,1.0

  • gradients : 15, 18, 30 MV/m

  • 5, 6 and 7 cells per cavity

  • Cold (2K) quadrupoles in the cryomodules, independently aligned from the cavities (to minimize cold/warm transitions and maximize real estate gradient).

  • Cryomodules of maximum length (between 10 and 15 m), containing n cavities and (n+1) quadrupoles. Diagnostics, steering etc. between cryomodules.

  • Length of the cavities limited by fabrication and handling considerations. Proposed number of cells per cavity is therefore 5, 6 and 7 for the three sections.

  • 2 MW max power /coupler

  • Standardisation of the design after 2 GeV

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Linac based proton driver

HIP WG: long term alternatives

<-

* with brightness x2

** need new injector(s)

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