BGC Collaboration Meeting at CERN

27 Nov 2018, 08:30 → 28 Nov 2018, 22:00 Europe/Zurich

864/1-B04 (CERN)

Raymond Veness (CERN), Rhodri Jones (CERN)

The aims of the meeting are to:

• Identify all requirements for a fully working demonstrator instrument in the LHC tunnel by March 2020 (V3)
• Identify “must haves” installation for LS2,
• Summarise the know-how gained at Cockcroft, GSI and with the LHC fluorescence experiment. Identify the open issues with this knowledge gained with the aim of an operational instrument in LS2.
• Review the administration progress (Planning, ECR done and in progress, Infrastructure requests, project founding, responsibility share boundaries)
• Up-date on the status, requirements and compatibility with the HEL of the LS3 BGC (V4)
• Agree on an experimental programme on the Crockcroft 2 test bench (V2) for 2019
• Review the status and compatibility with the HEL of the LS3 BGC (V4)
• Gas type: Neon is baseline. Summarise reasons for that choice. What were the impacts if change to Nitrogen or Argon.
• Evaluate realistic goals for the performance concerning precision and resolution
• Arguments to keep and modify the fluorescence test set-up for Run 3

___________________________________________________________________________________

Previous collaboration meetings:

• March 2018, GSI
• June 2017, Cockcroft Institute
• October 2016, CERN

Tuesday 27 November

1 Welcome to CERN

Speaker: Rhodri Jones (CERN)

2 Review of actions from last meeting and objectives of the workshop

Speaker: Raymond Veness (CERN)

CERN-meeting-1118-intro-veness.pdf

CERN-meeting-1118-intro-veness.pptx

3 Future prospects for the BGC instrument

Speaker: Carsten Peter Welsch (Cockcroft Institute / University of Liverpool)

4 Experimental results in 2018 from Cockcroft (20min + 10min)

i. Neon and Nitrogen gas jet formation
ii. Integration times
iii. Nozzle distances, Pressures of Neon
iv. Optimisations performed
v. Pressure profile across chambers with electron gun on/off and gas jet on/off

Speakers: Amir Salehilashkajani (Liverpool University), Dr Hao Zhang (University of Liverpool/Cockcroft Institute)

meeting20181127_v1.pdf

meeting20181127_v1.pptx

Pressure Details20180920_before_special_gasket.xlsx

Pressure details after adding special gaskets.xlsx

5 Experimental results in 2018 from LHC fluorescence measurements (15min + 5min)

i. Experiment performed
ii. Data obtained
iii. Obstacles (synchrotron radiation, scattered particles)

Speaker: Stefano Mazzoni (CERN)

2018.11.27_CollabMeeting.pdf

2018.11.27_CollabMeeting.pptx

10:30 ☕ Coffee Break ☕

6 Experimental results and developments from GSI in 2018 (15min + 5min)

i. Update on Argon
ii. Experiment in Munich
iii. Results and Discussion

Speaker: Serban Udrea (GSI Darmstadt)

Udrea_CERN_eLens_LatestDevelopments_20181127.pdf

7 Synchrotron Radiation (15min + 5min)

i. Source and Profile
ii. Synchrotron light stopper
iii. Blackening (calculation aspects)

Speakers: Johanna Glutting (Fachhochschule Kaiserslautern University of Applied Sciences (D), Marton Ady (CERN)

BGC Collaboration Meeting Syncrotron Radiation.pdf

BGC Collaboration Meeting Syncrotron Radiation.pptx

8 Nuclear scattered particles in camera electronics (15min + 5min)

i. Compare fluorescence measurements with expected gas jet
ii. Estimate creation of background in camera

Speaker: Stefano Mazzoni (CERN)

12:00 🍽️ Lunch 🍽️

Cafeteria 774 backroom

9 Cockcroft collaboration (20min + 5min)

i. Recruitment situation and plans, financial situation, main milestones
ii. Foreseen publications in 2019

Speaker: Carsten Peter Welsch (Cockcroft Institute / University of Liverpool)

10 Update on of the Hollow e-lens and e-beam (20min + 5min)

i. Update on HEL and electron beam diameter
ii. Clearing electrodes
iii. Update on e-lens parameters and interface
iv. Impact of nuclear scattered particles in E-lens?
v. Light sources in the E-lens?

Speaker: Adriana Rossi (CERN)

Rossi_BGC_2018_meeting.pdf

Rossi_BGC_2018_meeting.pptx

11 Expected limitations of the performance of the BGC (20min + 5min)

i. Update on limits to precision, resolution, integration time
ii. Can we confirm Neon as gas of choice

Speaker: Peter Forck (GSI)

Udrea_CERN_eLens_PerformanceLimits_20181127.pdf

12 Mechanical design of BGC (20min + 5min)

i. As per ECR (Tom)
ii. On-going minimisation work (Johanna)
iii. Nozzle chamber simplification
iv. Technical issues of blackening

Speakers: Johanna Glutting (Fachhochschule Kaiserslautern University of Applied Sciences (D), Tom Dodington (CERN)

BGC Collaboration Meeting Ongoing Design Work.pdf

BGC Collaboration Meeting Ongoing Design Work.pptx

13 Vacuum design (20min + 10 min)

i. Calculations performed
ii. Pumping requirements and proposals
iii. Control system
iv. Cabling

Speakers: Eric Page (CERN), Giuseppe Bregliozzi (CERN), Marton Ady (CERN)

bgc_integration_variants_cern_review_meeting.pdf

bgc_integration_variants_cern_review_meeting.pptx

16:00 ☕ Coffee Break ☕

14 Experimental programme 2019 (15min + 5min)

i. Experimental goals with the existing (v1) and new (v2) set-ups for 2019
ii. Vacuum qualification (Pumping speeds, blackening)

Speaker: Dr Hao Zhang (University of Liverpool/Cockcroft Institute)

2019Plan.pdf

2019Plan.pptx

15 Dinner

Wednesday 28 November

16 Nozzle expansion (10min + 5min)

i. High pressure expansion
ii. Nozzle options

Speaker: Barbara Kedzierska (Warsaw University of Technology (PL))

review_BGC_final.pdf

review_BGC_final.pptx

17 Blackening of the Interaction Chamber (10min + 5min)

Speaker: Johanna Glutting (Fachhochschule Kaiserslautern University of Applied Sciences (D)

BGC Collaboration Meeting Blackening.pdf

BGC Collaboration Meeting Blackening.pptx

18 Summary of Gas Jets

Speaker: Tom Dodington (CERN)

JetSummary.pdf

JetSummary.pptx

10:15 ☕ Coffee Break ☕

19 Planning (15min + 5 min)

i. Milestones
ii. To-do list (infrastructure requirements, cabling, gas piping)
iii. Engineering change requests with agreement on impedance, safety, aperture, vacuum

Speaker: Gerhard Schneider (CERN)

BGC Planning Review 2018 11 27.pdf

BGC Planning Review 2018 11 27.pptx

20 Project Status

i. Funding
ii. Boundaries between partners
iii. Collaboration deliveries

Speaker: Raymond Veness (CERN)

Project management.pdf

Project management.pptx

21 Wrap-Up

i. Identify show-stoppers
ii. Agree priorities
iii. Review summary

Speaker: Raymond Veness (CERN)

BGC-1118-closeout.pdf

BGC-1118-closeout.pptx