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Sector Test – Preparation Layout in LSS7

Sector Test – Preparation Layout in LSS7. Jan Uythoven (AB/BT) Thanks to Mike Lamont and the other ‘sector testers’. Sector Test: LSS7. Conditions and layout should be as close as possible to the final situation from injection to LSS7.R

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Sector Test – Preparation Layout in LSS7

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  1. Sector Test – PreparationLayout in LSS7 Jan Uythoven (AB/BT) Thanks to Mike Lamont and the other ‘sector testers’

  2. Sector Test:LSS7 • Conditions and layout should be as close as possible to the final situation from injection to LSS7.R • By definition this is not possible for LSS7.R as this is the end of the sector to be tested Dispersion Suppressor IP7 Long Straight Section Beam 2 Shielding Beam Dump Chamonix@Divonne 2006, Layout in LSS7

  3. not installed What should not be installed in LSS7 • D4 and everything towards the IP • not installed or not required • D3 may be installed, but will not see any beam • Check interference with shielding behind dump • No collimators installed (no TCP, TCHS, TCM, TCG) • Q6 & DFBM should be installed • Consists of 6 x MQTLH, not part of dispersion suppressor (up to Q8) • Presently confirmed to be ready DFBM Chamonix@Divonne 2006, Layout in LSS7

  4. Installation of Beam Dump in LSS7 • Temporary installation • Beam dump same type as used for TI 8 tests • But SPS type transport system attached to it, to avoid installation of fixings in the ceiling • Positioned on temporary support (blocks) • ‘Borrowed’ from TI 2 • No additionally radiated equipment Additional shielding as used in TI 8 Beam dump in place in TI 8 (smaller tunnel) End of beam pipe Chamonix@Divonne 2006, Layout in LSS7

  5. Position of temporary dump Space for QRL return module Position dump at sufficient distance from QRL return module:- mechanical interference- radiation  29 m Q6 not installed Chamonix@Divonne 2006, Layout in LSS7

  6. Beam Dump Area • Transport and installation of beam dump and additional shielding • Need to be integrated in LHC planning • Path taken for the transport • Time required for transport and installation (2 – 3 days) • Possibly obstruct passage once installed • Details of obstruction from drawing with dump in position • Assume 4 weeks for installation, operation, cool down, removal • Radiation issues • Remnant radiation: will effect access conditions after tests • Check with work planned in this area • Need of radiation monitoring • See talk of Helmut Vincke Chamonix@Divonne 2006, Layout in LSS7

  7. Other additional equipment • Additional BDI • BCT half way between Q6 and beam dump: measure the intensities dumped on the TED • Additional BDI NOT installed • BLMs • As there should be some already on Q6 • BPM at Q6 will also indicate beam, besides the screen • Radiation monitors near dump are foreseen • BTV • Standard BTV installed less than 1 m in front of Q6 • Vacuum pipe between sector valve on Q6 up to the beam dump • Proposed is 4 sections of about 7 m each • Stops about half a meter before dump, standard AlTi window with CC protection against implosion • The VADL installed on the left of Q6 includes an ion pump + pirani + penning gauge for the part left of the sector valve • No additional vacuum pumping or instrumentation required Chamonix@Divonne 2006, Layout in LSS7

  8. Access & Ventilation • Additional access door • Temporary access door about 800 m in the arc 7 – 6 • Access to part of sector 6 – 7 will not be possible • At least one day before the test (closing the zone) • during the beam tests • 2 – 3 days following the tests • See talk Pierre Ninin on the Temporary Access System • Collimation ventilation doors will not be installed • For handling radioactive air produced at the collimators • Not an issue for the sector tests (no collimators) • Don’t want the doors, or chicanes for final layout, to ease transport of equipment Chamonix@Divonne 2006, Layout in LSS7

  9. Conclusions • Layout in LSS7 as will be used for the sector test will be identical to the nominal situation up to and including Q6.R7 • Only additional equipment foreseen: • Beam dump: TED from TI 2 and additional shielding • BCT in front of TED • Vacuum chamber between Q6 and TED • To be studied in more detail • Transport of TED • Effect of TED installation and radiation issues on the general LHC planning • Detailed layout drawing for sector test set-up in LSS7 to be made in the coming months Chamonix@Divonne 2006, Layout in LSS7

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