Experimental Interaction Region – updates
and coordination
Andrei A. Seryi (JAI), Rogelio Tomas (CERN)
On behalf of EuroCirCol WP3 EIR design team:
CERN, CI, EPFL, INFN, JAI
WP3 coordination meeting
4 April 2017
The tasks and the team:
CERN: Rogelio Tomas,
Roman Martin, Andy Langner
• IR Work Package
– Development of the EIR lattice
• JAI/Oxford, CERN, task 3.2
• PhD student started Oct 2015 & Oct 2016
• OX PostDocs: started in Jan and Feb
– { OPTICS }
– { OPTICS / ENERGY DEPOSITION }
– Design of machine detector interface
• CI/Manchester, INFN, CERN, task 3.3
• PostDoc in Manchester, topic:
– { MDI }
• PostDoc in INFN, topic:
– { MDI }
– Study of beam-beam interaction
• EPFL, CERN, task 3.4
• PostDoc started in Aug 2015
• Plans for more hires
If names are missing, please tell
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JAI/OX: Andrei Seryi,
Emilia Cruz Alaniz,
Jose Abelleira Fernandez,
Leon van Riesen-Haupt
JAI/RHUL: Laurie Nevay
Andrei Abramov – PhD student
who recently joined the team
CI/Manchester: Rob Appleby,
Haroon Rafique
CERN: Francesco Cerutti,
Maria Ilaria Besana,
Helmut Burkhardt
INFN: Manuela Boscolo,
Francesco Collamati
EPFL: Javier Barranco,
Jorge Patrik Gonçalves
CERN: Tatiana Pieloni,
Xavier Buffat
Status
• Experimental Interaction Region progress
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Converged on L* of 45m
Optics of IR with new L*
Designed for beta* of 0.3 m
Study of inner triplet shielding and beam-beams are encouraging
Cross-talks between IRs show the issues likely tolerable
• Confirm with FLUKA
– IR orbit correction works
– DA is being improved
– SR radiation studies in IR are encouraging
• Effect of spectrometer dipole to be checked
– Further optimization of triplet for alternative beta* and L* ongoing
• Presented flat beam optics and E-deposition at BDS mtg this morning
• https://indico.cern.ch/event/610799/
– Requirements from magnet team is being taken into account
– Beam-beam studies are ongoing
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Work focus for Berlin-2017
• Oct 2015 to Apr 2016 (Orsay to Rome)
– Consolidation to a single baseline
– Successfully achieved
• Model of detector
• EIR optics with L* 45m and triplet model
• Ring optics
• Apr 2016 to Nov 2016 (Rome to ALBA)
– Variations around Rome baseline
• Model of detector changed
• Alternatives for EIR triplet model
• Nov 2016 to May 2017 (Alba to Berlin)
– Next round of consolidation to a single and more optimal baseline
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Converge on detector model (confirm L* fixed or reduce it
Converge on triplet configuration
Consider flat beams and alternative to crab cavities
Write IPAC 2017 paper
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Oncoming meetings
• Today – 4 April
– Focus on optics & coordination
• Next – 28 April
– Focus on E-deposition, beam-beam and MDI
– This will be a meeting joint with team
working on IR magnets
• Then (TBC) – 5 May
– Focus on updates, Berlin talks and IPAC
2017 paper
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Apr 28 joint mtg tentative schedule
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28th April 2017, 30-6-019, 13:30-16:30 CERN time:
Approval of minutes (of previous magnet mtg) and follow-up, Daniel Schoerling, 10 min
Overview of the magnet families in the lattice and first overview of the magnets for the injector
complex, Antoine Chance, 30 min
Overview of the magnets for IRs, Rogelio Tomas Garcia, 30 min
Overview and status of the radiation load studies, Francesco Cerutti, 30 min
Muons cross-talk Haroon Rafique 20m
Muons cross-talk Jose Abelleira 20 m
Beam-beams Tatiana Pieloni 20 m
More WP3 talks if needed
AOB, 20 min
https://indico.cern.ch/event/627916/
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WP3 EuroCirCol milestone
• WP3 milestone – 30 Apr deadline
– ‘Requirements and constraints of EIR
design options on WP3, WP4, WP5’
– Template will be send around
– Structure / writing tasks to be assigned
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IPAC17 paper/poster
• To be done:
– Add authors if missing; define structure; distribute writing
tasks; write it; assign presenter
Title: Overview of Design Development of FCC-hh Experimental Interaction Regions
Abstract: The experimental interaction region is one of the key areas that define the performance of the
Future Circular Collider. In this overview we will describe the status and the
evolution of the design of EIR of FCC-hh, focusing on design of the optics, energy deposition in EIR elements,
beam-beam effects and machine detector interface issues.
Authors: Andrei Seryi, Jose Luis Abelleira, Emilia Cruz Alaniz (JAI, Oxford), Michael Benedikt, Maria Ilaria
Besana, Helmut Burkhardt, Francesco Cerutti, Andy S. Langner, Roman Martin, Werner Riegler, Daniel
Schulte, Rogelio Tomas (CERN, Geneva), Robert Appleby (Cockcroft Institute, Warrington, Cheshire; UMAN,
Manchester), Javier Barranco, Xavier Buffat, Tatiana Pieloni (EPFL, Lausanne), Manuela Boscolo, Francesco
Collamati (INFN/LNF, Frascati (Roma)), Laurence James Nevay (JAI, Egham, Surrey; Royal Holloway,
University of London, Surrey), Léon van Riesen-Haupt (JAI, Oxford; University of Oxford, Oxford), Michael
Hofer (TU Vienna, Wien)
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