Final Design Review for the HL-LHC BPMs

Wednesday 18 Nov 2020, 09:00 → 18:00 Europe/Zurich

Zoom

Aim of the Review:

• To confirm that we are ready to hand over the design of the various different BPMs for the HL-LHC Interaction Regions to CERN Internal Manufacturing Workshop of fully compliant pre-series and to BINP for preparing the production.
• To freeze the interfaces and integration aspects impacting all of these BPMs

The Review Panel are asked to answer the following questions:

1. Does each BPM design meet the functional requirements?
   The characteristics to be assessed in particular are: beam position measurement capability, beam coupling impedance, electron cloud mitigation, cooling including temperature and heat-load management, vacuum integrity, collision debris absorption (where applicable).
2. Is each BPM design sound and optimised for ease of production and cost?
   Design aspects to be assessed in particular are: selected raw materials, machined conflat flanges, synergies with TE/VSC designs (thermal links, RF fingers), coating materials, tooling for BPM alignment, copper inserts, welding lips, cooling capillaries.
3. Is the BPM integration within each cryo-assembly well defined?
   The integration issues to be assessed in particular are: definition of interfaces to the downstream and upstream components, BPM installation procedure including use of the necessary tooling, routing of the cryogenic cables installed within the cryo-assembly, location of cryostat flanges, mock-up plans.
4. Does the procurement and mechanics production plan promise a successful delivery?
   Production aspects to be assessed in particular are: selected machining methods, division of responsibilities between CERN and BINP, production capabilities at BINP, prototyping plan, quality assurance plan, documentation, coating and assembly procedures, non-conformity treatment.
5. Are the project budget and schedule clear and in line with the HL-LHC project?
   Parts of the project to be assessed in particular are: alignment with the global HL-LHC schedule, missing expenses, overlooked tasks.

Composition of the Review Panel: M. Zerlauth (Chair), V. Baglin, P. Fessia, T. Lefevre. 

Sc. Secretary: M. Bozzolan

HL-LHC-BPM-Final-Design-Review-2020-Valid.pdf

Zoom Room

09:00 → 11:50 BPM design, interfaces and integration

09:00 Introduction and summary of the 2018 review

Speakers: Raymond Veness (CERN), Rhodri Jones (CERN)

Introduction HL-LHC BPM final design review.pdf

Introduction HL-LHC BPM final design review.pptx

09:10 Overview of the HL-LHC BPMs

• The three types of BPMs: Q1, Q2a-D1, D2
• Electrode, feedthrough, button design
• Summary of beam coupling impedance simulations
• Summary of thermomechanical simulations
• Amorphous carbon coating for electron cloud mitigation
• Tungsten shielding for collision debris absorption
• Cabling routing overview

Speaker: Michal Krupa (CERN)

2020-11-18_hl_bpm_overview.pdf

2020-11-18_hl_bpm_overview.pptx

10:00 Mechanical design, integration and tooling

• Mechanical differences between the three types of BPMS: Q1, Q2a-D1, D2
• Machined conflat flanges: tests done at CERN, M6 screws
• Design of copper inserts
• Quasi-symmetric D2 button BPM design
• Synergies with TE/VSC: tungsten blocks, thermal links
• Installation situation in cryostats
• Alignment procedure and tooling
• Status of manufacturing drawings

Speakers: Mr Dmitry Gudkov (Budker Institute of Nuclear Physics (RU)), Gerhard Schneider (CERN)

HL-LHC BPM Final Design Review - Mechanical design, integration and tooling.pdf

HL-LHC BPM Final Design Review - Mechanical design, integration and tooling.pptx

10:40 Coffee break

11:00 Vacuum connections, interfaces and technologies

• Up-date of the implementation of the responsibility share as per Memorandum EDMS No. 2105453
• Solutions for cooling of the vacuum components
• Tolerances of the BPM-relevant vacuum components in the Inner Triplet and D2
• Assembly sequence of the beam screen and vacuum components in the Inner Triplet and D2
• Overview of the design of welding. Cutting machines situation

Speaker: Cedric Garion (CERN)

HL_LHC_BPM_finalreview_Vacuum_CG.pdf

HL_LHC_BPM_finalreview_Vacuum_CG.pptx

11:50 → 14:00 Lunch break

14:00 → 16:00 BPM manufacturing, assembly and quality

14:00 Manufacturing Study, Pre-production and Quality

Details of components manufacturing
BPM Body
Machining
Coatings
Welding
Relevant tooling
Prototypes and tests at CERN
Transitions
Electrodes
Cooling links
Assembly
Amorphous carbon coating
Identification of work for BINP and CERN
Quality assurance

Speaker: Mr Dmitry Gudkov (Budker Institute of Nuclear Physics (RU))

HL-LHC BPM Final Design Review - Manufacturing Study, Pre-production and Quality.pdf

HL-LHC BPM Final Design Review - Manufacturing Study, Pre-production and Quality.pptx

14:25 Manufacturing capabilities and production plans at BINP

• Manufacturing capabilities and previous experience with CERN components
• AOB

Speaker: Alexander Krasnov (Budker Institute of Nuclear Physics (BINP))

14:50 Budget and schedule

• Prototype and production planning
• Delivery plans – needed by date
• Alignment with the global HL-LHC schedule
• Budget overview

Speaker: Michal Krupa (CERN)

2020-11-18_hl_bpm_schedule.pdf

2020-11-18_hl_bpm_schedule.pptx

16:00 → 18:00 Closed sessions for the reviewers

It is proposed to present the conclusions to a future HL-TCC

BPM Review 2020 V2.0.pdf

BPM Review 2020 V2.0.pptx