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Motivation for the new Linac4-to-PSB Half-Injection-Sector Test

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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Motivation for the new Linac4-to-PSB Half-Injection-Sector Test

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  1. Motivation for the new Linac4-to-PSB Half-Injection-Sector Test B. Mikulec

  2. 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

  3. 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

  4. 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

  5. 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

  6. 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

  7. 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

  8. 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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