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LHC TAN forward detectors

LHC TAN forward detectors. Outline. Location in LHC Specificities Detectors purpose Modifications in the LHC tunnel Services. TAN study group, 21/09/2012 A. L. Perrot 1. Point 4. Point 5. Point 6. Point 3.3. CMS. BRAN, CMS ZDC.

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LHC TAN forward detectors

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  1. LHC TAN forward detectors TAN study group, 21/09/2012 A. L. Perrot

  2. Outline • Location in LHC • Specificities • Detectors purpose • Modifications in the LHC tunnel • Services • TAN study group, 21/09/2012 A. L. Perrot 1

  3. Point 4 Point 5 Point 6 Point 3.3 CMS BRAN, CMS ZDC Point 3.2 BRAN, ALICE ZDC Point 2 Point 7 LHCf, BRAN, ATLAS ZDC Point 8 Point 1 LHC-b ATLAS Location in LHC • TAN study group, 21/09/2012 A. L. Perrot 2

  4. Point 1 Q4 XRP3 D2 TAN Q4 XRP2 D2 TAN Point 5 XRP1 UJ53 RI13 D1 USA15 D1 Q3 UJ13 Q3 Q2 Q2 Q1 Q1 UJ14 Q1 Q1 Q2 Q2 Q3 Q3 D1 D1 US15 UJ16 USC55 TAN UJ17 XRP1 TAN D2 UJ57 Q4 RI17 D2 XRP2 Q4 R57 XRP3 Location in LHC • 3

  5. Location in LHC In each TAN 1 slot with 10 movable Cu bars Slot : l1000 x w95 x h605 Possibility to add instrumentation • TAN study group, 21/09/2012 A. L. Perrot 4

  6. CMS ZDC ECAL HCAL ATLAS ZDC BRAN BRAN LHCf TAN detectors Point 5 TAN detectors Point 1 Location in LHC LHCf: LHCforward physics BRAN: Beam RAdiationNeutralsmonitor ZDC: Zero Degree Calorimeter ECAL = ElectromagneticCALorimeter HCAL = HadronicCALorimeter • TAN study group, 21/09/2012 A. L. Perrot 5

  7. TAN detectors in Point 1 IP1 June 2009 LHCf ATLAS ZDC HCAL BRAN-Sci BRAN -IC ATLAS ZDC ECAL • TAN study group, 21/09/2012 A. L. Perrot 6

  8. TAN detectors in Point 5 IP5 BRAN -IC CMS ZDC ECAL CMS ZDC HCAL • TAN study group, 21/09/2012 A. L. Perrot 7

  9. Specificities / challenge • LHC experiments detectors located inside the LHC tunnel • => coordination in LHC machine & experiments caverns/services areas • inside LHC machine absorbers TAN, located all together in 1m long slots & few • mm from the beam pipe; • designed &produced in Japans/Italy/USA  to be inserted in very narrow locations inside already installed LHC equipment (few mm tolerances) • exchange/removal of TAN detectors during LHC operation => radiological issues • TAN study group, 21/09/2012 A. L. Perrot 8

  10. LHCf Purpose: Understanding high energy cosmic ray phenomena => (calibration of MC codes at 1017eV (Elab. equiv of LHC) help to decide which model is best for MC simul. of HECR air showers) Understanding of the energy distribution of particles emitted in the very forward region of hadronic interactions LHCf will measure forward production spectra of photons and π° (and neutrons) Simulation atmospheric shower due to 1019eV proton • TAN study group, 21/09/2012 A. L. Perrot 9

  11. silicon layers scintillating fibers tungsten layers scintillators tungsten layers scintillators Detector #2 Detector #1 I P1 TAN TAN (RI171- right to IP1) (RI132- left to IP1) LHCf Courtesy of LHCf Firenze team Courtesy of LHCf Nagoya team 1 detector in the TAN absorber on each side of Point 1 e.m. calorimeters with position sensitive layers • TAN study group, 21/09/2012 A. L. Perrot 10

  12. LHCf • TAN study group, 21/09/2012 A. L. Perrot 11

  13. Quartzfibers Quartz fibers EM module Had. module ATLAS Zero Degree Calorimeter Primary role: - event characterization in HI collisions - obs. neutral partic. produced in HI or pp collisions Secondary role: - luminosity measurement - beam tuning ZDC detector: - tungsten/quartz-fibers layers - 2 calorimeter sections: EM and hadronic - 1 detect.= 1 mod. EM + 3 mod. Had Location: 1 detec. in each TANs around of IP1 • TAN study group, 21/09/2012 A. L. Perrot 12

  14. ATLAS Zero Degree Calorimeter Installation in 2 phases with LHCf without LHCf • TAN study group, 21/09/2012 A. L. Perrot 13

  15. Beam RAte Neutrals monitor (BRAN) • Role: • monitor and optimise the LHC relative luminosity on a bunch by bunch basis • (idea: utilising the very forward flux of secondaries from IP that are intercepted by the TAN) • BRAN detector: • - designed and built by Berkeley • - work in collaboration with BE/BI • - segmented, multi-gap, pressurized Ar-N2ionisation chamber • (4 quadrants; 1 quadrant: 60 gaps of 0.5mm separated by 1mm thick Cu plates) • Location: • in both TANs on each side of IP1 and IP5 Courtesy of K. Chow- LBNL • TAN study group, 21/09/2012 A. L. Perrot 14

  16. BRAN – inside views Detail of ionization chamber area Peel off case Remove copper filler bars Courtesy of K. Chow- LBNL • TAN study group, 21/09/2012 A. L. Perrot 15

  17. Courtesy of CMS/ZDC team CMS Zero Degree Calorimeter • Role: • - Heavy ions physics studies (A+A, p+A and p+p collisions ) • - Labs of p+p, p+A, A+A coll., • - stot of p+p and A+A coll., • ZDC detector: • - a tungsten plate/quartz fiber ribbon sandwich • - 2 calorimeter sections: e.m. and hadronic • 1 detect= 1 EM sect.+ 4 equal had. sect. • Location: • in both TANs on each side of IP5. • TAN study group, 21/09/2012 A. L. Perrot 16

  18. CMS Zero Degree Calorimeter ZDC hadronic module (ready for installation) ZDC hadronic module (inside view) ZDC hadronic module (inserted in the TAN slot) • TAN study group, 21/09/2012 A. L. Perrot 17

  19. Modifications of the LHC machine L<1033 cm-2 s-1: LHCfand/or the ATLAS ZDC => sufficient shielding of the machine elements L> 1033 cm-2 s-1: LHCfand/or the ATLAS ZDC =>replaced by Cu bars to avoid the quench of D2 Radio Protection requirement: remote manipulation of thedetectors/Cu bars and underground storage in the machine tunnel. Safety requirement: footbridge above the QRL • TAN study group, 21/09/2012 A. L. Perrot 18

  20. Removal of the detectors Point 5 remote handling system under construction Installation during LS1 Point 1 remote handling system March 2009 • TAN study group, 21/09/2012 A. L. Perrot 19

  21. Storage of the detectors underground Dedicated bunkers built in adjacent UJs Dedicated bunkers built in adjacent UJs Sarcophagi for BRANs Sarcophagifor ZDCs • TAN study group, 21/09/2012 A. L. Perrot 20

  22. Paths followed by CMS ZDC cables XRP3 Q4 XRP2 D2 TAN Point 5 XRP1 UJ53 D1 Q3 Q2 Q1 UL55 USC55 Q1 Q2 Q3 D1 laser room TAN XRP1 D2 UJ57 Q4 XRP2 R57 XRP3 CMS-ZDC rack • TAN study group, 21/09/2012 A. L. Perrot 21

  23. Footbridge above QRL • TAN study group, 21/09/2012 A. L. Perrot 22

  24. Footbridge above QRL • TAN study group, 21/09/2012 A. L. Perrot 23

  25. Associated services • Work performed on TAN: holes drilling for patch-panels installation of LHCf and BRAN (TS/IC,TS/LEA). • Cables and fibers • installed between TANs and racks located in ATLAS and CMS services areas • different paths followed (depending of cable types); • compatibility with the cables already installed/foreseen for the machine and the ATLAS experiment. • additional cable trays installed in LHC tunnel • Additional power plugs • BRAN: • - gas installation and distribution (TS/LEA/gas section) • locked caged area + change over panel (Pt1-US15 and Pt5-UJ56) • gas distribution network between the caged area and the TAN • TAN study group, 21/09/2012 A. L. Perrot 24

  26. TAN Gas distribution at Point 1 LOCKED CAGE Associated services BRAN: Special agreement with safety dept. to have gas bottles underground • TAN study group, 21/09/2012 A. L. Perrot 25

  27. road 1 Q4 D2 TAN Point 1 USA15 RI13 D1 UJ13 Q3 Q2 Q1 UJ14 Q1 road 2 Q2 Q3 US15 D1 UJ16 UJ17 TAN RI17 D2 Q4 Paths followed by LHCf and ATLAS ZDC cables detectors LHCF and ATLAS ZDC racks detectors • TAN study group, 21/09/2012 A. L. Perrot 26

  28. Cables trays for LHCf and ATLAS ZDC UJ13 LSS1 ATLAS exp. cavern LSS1 • TAN study group, 21/09/2012 A. L. Perrot 27

  29. Thanks for your attention

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