LHC to HL-LHC: TAS-TAN de-installation & TAXS-TAXN installation
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1 LHC to HL-LHC: TAS-TAN de-installation & TAXS-TAXN installation S. Evrard, F. Sanchez Galan, EN-EA on behalf of WP8 EDMS Special thanks to Damien Brethoux, Paul Strähle, Isabel Naranjo De Candido, Catarina Carvalheiras, Jean-Louis Grenard. 7 th HL-LHC Collaboration Meeting Madrid November 2017
2 Table of contents Machine-Experiment interface: Absorbers Absorbers: from LHC to HL-LHC TAS de-installation and TAXS installation TAN de-installation and TAXN installation ALARA & Work dose Planning Schedule Summary and next steps S. Evrard, EN-EA - 7th HL-LHC Annual Meeting - Madrid 14 Nov
3 Machine experiment interface: absorbers The passive absorbers for charged (TAS) and neutral (TAN) particles are designed to primarily protect the nearby superconducting magnets from the radiation coming out from the interaction region simultaneously provide a background reduction to the experiments for beam interactions in the collimators and beam gas They are located on either side of IP1 and IP5 Courtesy of I. Efhtymiopoulos S. Evrard, EN-EA - 7th HL-LHC Annual Meeting - Madrid 14 Nov
4 Machine experiment interface: absorbers Absorbers to protect the inner triplets and dipoles from the collision debris generated at the interaction point. Target Absorber for Neutrals (TAN TAXN) Target Absorber for Secondary (TAS TAXS) S. Evrard, EN-EA - 7th HL-LHC Annual Meeting - Madrid 14 Nov
5 Machine experiment interface: absorbers Target Absorber Secondaries (TAS) Target Absorber Neutrals (TAN) S. Evrard, EN-EA - 7th HL-LHC Annual Meeting - Madrid 14 Nov
6 Absorbers: from LHC to HL-LHC New absorbers TAXS and TAXN The protection must be extended to D1 magnets that in HL-LHC will be superconducting The new absorbers must have an aperture adapted to the HL-LHC beam optics and operation They should be designed to cope with the increased energy deposition Optimized engineering based on experience, e.g. ALARA, reduce exposure time for major operations. S. Evrard, EN-EA - 7th HL-LHC Annual Meeting - Madrid 14 Nov
7 Absorbers: from LHC to HL-LHC Equipment Quantity Location TANB for LHCb 2 units (1 per IP side) P8 TAXN for ATLAS 2 units (1 per IP side) P1 TAXN for CMS 2 units (1 per IP side) P5 TAXS for ATLAS 2 units (1 per IP side) P1 TAXS TAXS for CMS 2 units (1 per IP side) P5 TAXN TANB for LHCb S. Evrard, EN-EA - 7th HL-LHC Annual Meeting - Madrid 14 Nov
8 TAS de-installation and TAXS installation Although conceptually similar, conception of the Forward Shielding is based on different principles in ATLAS and CMS. S. Evrard, EN-EA - 7th HL-LHC Annual Meeting - Madrid 14 Nov
9 The TAS absorbers cannot be removed exactly as they were installed in ATLAS and CMS. The TAS absorbers were inserted in their cradle then in TX1S shielding at the surface before lowering the whole (TAS + cradle+ TX1S) and installation at IP1 TAS de-installation The TAS absorbers were installed at IP5 together with the surrounding FIN shielding and the covering plug using the surface crane. S. Evrard, EN-EA - 7th HL-LHC Annual Meeting - Madrid 14 Nov
10 TAS de-installation Two scenarios have been studied: removal of TAS operating from the LHC tunnel side removal of TAS operating from the Experimental caverns Strong baseline is to remove TAS from the experimental cavern side, taking into account: the optimal phasing and schedule the dose rates involved in the work in both scenarios, the work on surrounding elements (in particular the inner triplet) that may be impacted by the presence or the absence of the TAS, as it will be a major source of radiation in this environment S. Evrard, EN-EA - 7th HL-LHC Annual Meeting - Madrid 14 Nov
11 TAS de-installation Removal of surrounding shieldings Removal of VT and VJ beam pipe sections Removal of alignment plate Removal of alignment and support rods TAS cradle extraction from TX1S with winch Courtesy of D. Brethoux, P. Strähle TAS + cradle (as sarcophagus) ready for long term storage S. Evrard, EN-EA - 7th HL-LHC Annual Meeting - Madrid 14 Nov
12 TAS de-installation Opening of rotating shielding Removal of VAX Plug Removal of vacuum system Removal of alignment and support rods (horizontal) TAS and FIN plug removal with UX55 crane TAS insertion in sarcophagus Courtesy of D. Brethoux S. Evrard, EN-EA - 7th HL-LHC Annual Meeting - Madrid 14 Nov
13 TAXS installation TAXS installation using new cradle, assembly at the surface Usage of a push-pull system for the insertion into TX1S Reverse the removal procedure Courtesy of P. Strähle S. Evrard, EN-EA - 7th HL-LHC Annual Meeting - Madrid 14 Nov
14 TAXS installation VAX relocated from machine to experimental side to ease operation and future dismantling Remote handling and connecting with TAXS Installation in parallel to exp. Beam pipe S. Evrard, EN-EA - 7th HL-LHC Annual Meeting - Madrid 14 Nov
15 TAN de-installation TAN de-installation: main steps Forward experiment dismantling (procedure documented in EDMS ) Service and vacuum remote dismantling (possibly with robot) Handling equipment preparation incl. shielding Transfer to vehicle Driving to destination Dismounting Y-vacuum chamber (for re-using the existing shielding) S. Evrard, EN-EA - 7th HL-LHC Annual Meeting - Madrid 14 Nov
16 TAN de-installation Destination: 2 options studied: surface or UJ s Access shafts: PX24 and PX65 or PX 45 travel distance in the tunnel ~3.3 km instead of 140 m for UJ s. The TAN transport and installation took place before the cryomagnets were installed in the concerned sectors Many obstacles like R2E shielding in UJ13, 17, RR57, UX65 or UX45 and UX25 access. Dimensions: Overall length=4.9 m Width=1.1 m Height=1.1 m Design mass=31 t (measured mass=29 t) S. Evrard, EN-EA - 7th HL-LHC Annual Meeting - Madrid 14 Nov
17 TAXN installation Bringing the TAN back to surface is tricky given LHC accelerator components & infrastructure in the way. Decision to re-use the existing shielding for the TAXN Two reasons for studying another option: perform TAN TAXN modifications in UJ s However there are lot of activities to be done in the, so this option also looks challenging. 1) Civil engineering with cores 2) Decabling 3) Re-routing of the new services and cabling 4) Removal of the Power converters and installation of the QH power supplies Both options are still under investigation and all constraints shall be analyzed S. Evrard, EN-EA - 7th HL-LHC Annual Meeting - Madrid 14 Nov
18 TAXN installation New vehicle designed by EN-HE based on Industrial products (trailer, tractor, motorized rollers) JUNG dollies to act as a trailer to carry the TAN and TAXN ~3km Hydraulic Transfer System: lateral displacement mechanism proposed by HILLMAN with actuated rollers. Remotelly controlled equiment Courtesy of C. Carvalheiras S. Evrard, EN-EA - 7th HL-LHC Annual Meeting - Madrid 14 Nov
19 ALARA & Work dose Planning ALARA principles already discarded some de-installation methods Tailor-made shielding to be manufactured (Sarcophagi for TAS and TAN shielding plates) Remote controlled dismantling (possibly with robot) and remote handling as much as possible Effects on other HL-LHC activities in machine and exp. s Prepare TAXS and TAXN removal procedure and accommodate design accordingly (e.g. VAX) Optimization process still on-going and ALARA L3 committees foreseen Preliminary estimates Collective dose (msv) per item Total collective dose (msv) ALARA level TAS removal >2 >8 3 TAXS installation <1 <4 2 TAN removal >6 >24 3 TAXN installation <1 <4 2 S. Evrard, EN-EA - 7th HL-LHC Annual Meeting - Madrid 14 Nov
20 Schedule Main Constraints TAN/TAXN: machine driven schedule TAS/TAXS: experiment driven schedule (but also machine connected) Main Forward shielding modification during LS2 (JTT) ATLAS and CMS must be in closed configuration for removing TAS and Installing TAXS i.e. at the beginning of LS3 and/or at the very end of LS3 LS3 Forward shielding modifications only possible when inner triplets have gone Machine experiment interface also in terms of schedule Resources/coordination required from/with many HL-LHC WP s and CERN groups HL-LHC installation activities TAN/TAXN Location HL-LHC WP Group contribution for installation Period EP- EP- P1 P2 P4 P5 P7 P8 SPS 4 5 6B CMX ADO ACE BI CRG CV EA EL EPC HE ICS MME MPE MSC RF SMB STI VSC LS3 X X X X X X X X x X X X X X TAS/TAXS LS3 X X X X X X X X x X X X X X S. Evrard, EN-EA - 7th HL-LHC Annual Meeting - Madrid 14 Nov
21 Schedule EYETS Q4 Q1 Q YETS Q3 Q4 Q LS2 YET EYETS Q2 Q3 Q4 Q3 Q4 Q1 Q YETS Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q Q3 Q4 Q1 Q Q3 Q4 Q1 equirements Requirements Functional specification Functional specification Engineering specification Acquisition process ATLAS / CMS 2 units/point Target Absorbers for Insertion Region Neutrals Requirements Functional (TAXN) specification Engineering specification LCHb Acquisition process 2 units S1S2 2 units fabrication & assembly Factory test eline Dismt. LHCb Commissioning LHCb equirements Inst. LHCb 2016 Target Absorbers Functional specification Engineering specification for Insertion ATLAS / CMS Acquisition process Region 2 units/point Secundary (TAXS) Requirements Radiation Functional specification Engineering Forward specification shielding Shielding Acquisition modification process (Baseline and ATLAS Fabrication, / CMS assembly and verifiction Option) ATLAS PH I CMS PH I LS2 LS Q2 Q3 Q4 Q Q2 Q3 Q4 Q Q2 Q3 Q4 Q Engineering specification Acquisition process S1 S2 S3 S4 4 units fabrication & assembly Factory test Dismt. ATLAS Inst. ATLAS Commissioning ATLAS Dismt. CMS Inst. CMS Commissioning CMS Functional specification Engineering specification Acquisition process S1S2 2 units fabrication & assembly Factory test Dismt. LHCb Commissioning LHCb Requirements Inst. LHCb Functional specification Engineering specification Acquisition process S1 S2 S3 S4 4 units fabrication & assembly S1 S2 S3 S Factory test Dismt. ATLAS Inst. ATLAS Commissioning ATLAS Dismt. CMS Inst. CMS Commissioning CMS Requirements Functional specification Engineering specification Acquisition process Fabrication, assembly and verifiction ATLAS PH PH II I CMS PH PH II I ICATION ASSEMBLY LEGEND INSTALLATION SPECIFICATIONS TEST FABRICATION MILESTONES: FC ASSEMBLY - Finance committee A - Acquisition INSTALLATION process TEST MILES S. Evrard, EN-EA - 7th HL-LHC Annual Meeting - Madrid 14 Nov
22 Summary and next steps A first sequence of operations for the ATLAS/CMS TAS/TAN removal and TAXN/TAXS installation has been studied and presented Strong baseline already defined: TAS removal and TAXS installation via Experimental s New vehicle for TAN removal and TAXN installation VAX moved to Exp. s to ease operation and future dismantling Several points in the sequence require close manual contact with the nearby equipment. Detailed removal procedure and Work Dose Planning to be further studied New tools must be developed to optimise the process according to ALARA TAN to TAXN modification location still under investigation (UJ s or surface) Strong interactions with machine (TAN/TAXN) and experimental (TAS/TAXS) activities during LS3 Resources/coordination required from/with many HL-LHC WP s and CERN groups S. Evrard, EN-EA - 7th HL-LHC Annual Meeting - Madrid 14 Nov
23 Thanks to all members of WP8 & contributors C. Adorisio, J. Albertone, V. Baglin, C. Boccard, I. Bergstrom, E. Bravin, D. Brethoux, H. Burkhardt, F. Cerutti, JP Corso, F. Sanchez Galan, M. Lino Diogo Dos Santos, P. Fessia, A. Gaddi, B. Di Girolamo, L. Krzempek, M. Lazzaroni, H. Mainaud-Durand, R. De Maria, D. Mergelkuhl, G. Pigny, J. Perez Espinos, A-L Perrot, S. Bartolome, M. Raymond, A. Santamaria Garcia, P. Santos Diaz, E. Thomas, B. Vazquez De Prada, H. Vincke. S. Evrard, EN-EA - 7th HL-LHC Annual Meeting - Madrid 14 Nov
24 References Scenarios for the removal of IR1 and IR5 TAS by F. Butin, EDMS Supply of a vehicle for TAN s installation in the LHC tunnel, EDMS Procedure de transport des Neutral Beam Absorbers (TAN), EDMS Instruction Handbook of the PTS35-CERN, EDMS Various Talks given at WP8 meetings, # 42, 49, 51 and 53 S. Evrard, EN-EA - 7th HL-LHC Annual Meeting - Madrid 14 Nov
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