motivation for the new linac4 to psb half injection sector test
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Motivation for the new Linac4-to-PSB Half-Injection-Sector Test. B. Mikulec. Introduction (1). Follow-up of BCC from 18 October 2012 Preliminary conclusions from that BCC:

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introduction 1
Introduction (1)
  • Follow-up of BCC from 18 October 2012
    • Preliminary conclusions from that BCC:
      • Simple stripping foil test at start of L4T feasible, but half-sector test in L4Z problematic (losses due to implementation within final L4Z layout)
      • Installation in L4T line (after hor. bending) to be studied  see presentation Veliko

BCC 22 April 2013

Ref: L4-T-EP-0002 rev 1.0

introduction 2
Introduction (2)
  • Extremely compact and complex section, combining equipment from TE/ABT, EN/STI, BE/BI, TE/EPC, TE/VSC, TE/MPE.
  • Main motivations for sector test have been laid out in EDMS 1224575.

Courtesy of

L. Zuccalli

BCC 22 April 2013

what can be tested elsewhere
What can be tested elsewhere
  • Integration issues, repair and intervention scenarios (incl. stripping foil exchange) with mechanical test stand
  • Stripping foil lifetime, stripping foil control and instrumentation including optimisation of screen and camera system, stripping foil efficiency and emittance growth with different foil types/thicknesses with stripping foil installation at start of L4T

BCC 22 April 2013

what could be tested in addition 1
What could be tested in addition (1)
  • BSW3+4
    • Powering and control of half of the chicane magnets
    • Current stability and interlocking
  • Stripping foil
    • More precise stripping efficiency measurement of H0 and H-
    • Interlocking of foil position
  • H0/H- dump
    • Aperture check
    • Temperature cross-check with simulated values  refine cooling requirements
    • Analysis of SiC material after removal (micro-cracks etc.; novel material!)
    • Interlocking (temperature and pressure drop – define operational thresholds)

BCC 22 April 2013

what could be tested in addition 2
What could be tested in addition (2)
  • Special BLMs
    • Diamond BLMs (?) to measure secondaries close to H0/H- dump; evaluate operational conditions for foil degradation measurement and fast losses
  • H0/H- current monitor: new development!
    • General operational check incl. for example secondary emission suppression
    • Sensitivity check for H0 and H-; comparison to theory
    • Aperture check
    • Influence on measurement if beam passes besides the monitor (simulate circulating beam)?
    • Interlocking – essential for dump protection
  • Interlock system test for part of PSB injection (BIS + SIS)
  • Specific applications

BCC 22 April 2013

to be sorted out
To be sorted out…
  • Planning
    • In parallel with Linac4 commissioning
    • Provide in time equipment, controls, applications
  • Location of control equipment, transformer etc.
  • Cabling
  • Support structures, special beam pipe connections…
  • Temporary downstream installation of dump (LBE/LBS line dump?) – could it be reused for L4T commissioning?
  • Water cooling of dump(s)

BCC 22 April 2013

conclusions
Conclusions
  • Half-injection-section test would be extremely beneficial
    • From technical point of view for each sub-system
    • For risk reduction
    • For reduction of commissioning time for Linac4-to-PSB connection
  • It seems feasible to provide the required equipment for start of 2016 (Linac4 reliability run), but infrastructure availability to be checked
    • Test should happen first part of 2016 to be able to react to potential lessons learnt…
  • Installation should not perturb too much Linac4 commissioning

BCC 22 April 2013

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