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Status of the H2 beam line - in view of Primary Ion run

Status of the H2 beam line - in view of Primary Ion run. Adrian Fabich, MEF-LE 13 th May 2014. Safety. Personal Protection Equipment inside the green line (= beam zones + central corridor) Safety shoes Helmet Specific precautions required for the primary ion run in early 2015

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Status of the H2 beam line - in view of Primary Ion run

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  1. Status of the H2 beam line- in view of Primary Ion run Adrian Fabich, MEF-LE 13th May 2014

  2. Safety • Personal Protection Equipment inside the green line (= beam zones + central corridor) • Safety shoes • Helmet • Specific precautions required for the primary ion run in early 2015 • Interlock chain in SPS • Bend limitations • Increased shielding of H2 in EHN1 A. Fabich

  3. H2 operation As experienced in previous runs • With a reasonable setup time we gain a lot in overall run efficiency • More efficient (cleaner) recording of events • Higher rate of interesting events • Less unnecessary data to be analysed (filtered) • Less time for changes between energy swaps at a later stage Liaison physicist: Adrian A. Fabich

  4. Primary Ion Operation The potential extraction of a proton beam (max. 3*1013) on a Primary Ion cycle to the SPS-NA must be excluded: • SPS interlock • exclude extraction of an SPS beam with more than 2*1011 charges per cycle. • Two dedicated, redundant BCTs installed • Bend limitations: • Procedural safety: • SPS protons extracted only >400 GeV • Primary ions extracted only at 380 GeV (<400 GeV) • In Primary Ion operation the transfer dipoles are limited (HW) to 390 GeV. A. Fabich

  5. H2 shielding • Achieve legal RP limits in corridors and barracks • Also during accidental beam loss upstream of PPE152 • Additional shielding (min. 80 cm concrete equivalent) • PPE132 and 142: fully covered to protect personnel in corridor and workshop • PPE152: lateral shielding up to 2 m above first floor • Effort • About 300 concrete blocks • about 200 kChF project costs (incl. blocks, person power, modifications of existing installations) A. Fabich

  6. PPE132/142 shielding A. Fabich

  7. PPE152 shielding • Only lateral • No roof cover beam Central passage NA61 target beam A. Fabich

  8. Modifications to NA61 And some minor re-arrangements to the concrete block floor in the zone A. Fabich

  9. Other EHN1 modifications • EHN1 clean-up during 2013 • About 80 trucks of material removed • Wood, metal, unidentified left-overs … • New GAMMA IRRADIATION FACILITY • Operational from Autumn 2014 • No impact on H2 layout • Also foreseen: removal of target station T24 (H4) A. Fabich

  10. Beam instrumentation • SBA instrumentation NOT in vacuum: • 131 m: MWPC + Scintillator (retractable) • 264 m: Trigger (retractable) • 385 m: MWPC + Scintillator (retractable) • 461 m: MWPC + Scintillator (retractable) • 527 m: 2x XDWC (fix) + Scintillator (retractable) 535 m: NA61 target • This equipment is mandatory - at least for setting up! • Other BI like FISCs etc. • NA61 vacuum around S2/V0 • On charge by NA61 • Vacuum elements stored in zone • Theoretically (by removing XDWC) the S2/V0 vacuum can be connected to the SBA vacuum A. Fabich

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