Gradual re-start of the experiments and Involvement of the user community

Eckhard Elsen

Online information meeting: Plan for CERN’s gradual re-start, May 5, 2020

Information provided by the 4 LHC Experiments

Progress during lock-down

• Limited progress with sub-detectors wherever possible including in remote institutes

• Teleworking has been used everywhere

• Analysis unhindered thanks to availability of IT infrastructure

• Design – access to CAD software (incl. remote licence usage)

• ASIC development

• design requires access to licensed software

• chip submission depending on availability of foundry access2

Big Thank you to

IT department

ASICs have been a

major concern of

upgrades

Logistics is a challenge

• Delivery of components from other institutes (or companies)

• Production halted

• Delivery chain broken

• Availability of foreign experts is a major uncertainty

• Varying travel restrictions

• entry to France and Switzerland

• departure from home country and uncertainty of returning home (quarantine)

• permission from some countries for work at CERN still needs to be granted

3

Progress is very

difficult to predict

Example ATLAS NSW: Saclay has to resume Micromegas assembly before integration onto wheels at CERN.

Priority: completion of Phase 1 and preparation of Phase 2 upgrades

LS2 Shutdown, where we are now

27/04/20 R.Carlin RRB-2020-027

HCAL barrel (last phase I):

install SiPM+QIE11-based

5Gbps readout

Pixel detector:

• replace barrel layer 1 (guideline

250 fb-1 max lumi)

• replace all DCDC converters

Muon system (already phase II):• install GEM GE1/1 chambers

• Upgrade CSC FEE for HL-LHC trigger rates

• Shielding against neutron background

Keep strip tracker cold to avoid reverse annealing

Install new beam pipe for phase II

MAGNET (stays cold!) & Yoke Opening • Cooled freewheel thyristor+power/cooling

• New opening system (telescopic jacks)

• New YE1 cable gantry (Phase2 services)

Near beam & Forward Systems • BRIL BCM/PLT refit

• New Totem T2 track det

• PPS: RP det & mechanics

upgrade

9

Civil engineering on P5 surface to prepare for Phase-2 assembly and logistics

Coarse schedule:• 2019: Muons and HCAL interleaved• 2020: beam pipe installation, then pixel re-

installation

• Some Phase 1 and maintenance, improvements

• Many activities already related to Phase 2 detector upgrades and relate services and infrastructure

Operations Spectroscopy CP violation Heavy ions Upgrade

LHCb upgrade I

LHCb-TDR-12

Emilie Maurice (LAL, LLR) LHCb status report 16/26

ALICE

CMS LHCb

ATLAS

4

Experience from pre-T0 phase

• Experiments have started to work under COVID-19-like safety measures both in laboratories and at the experimental points

• Feedback to HSE on

• wearing masks and Personal Protection Equipment in general; duration of work and practicalities of maintaining physical distance

• access to experimental points: hands-free use of doors and elevators

• density of people

Provides in

stant feedback

- good

training

Re-start of Experiments depends on Availability of Users (experts)

May June July August September October November December

T0: Begin of gradual re-start

June 8, LHC experiments and Accelerator: LS2 and Run 3

2020

Today

CERN all open

Users returning

Practicing work under COVID-19 rules

High priority work resuming where possible

User presence depends on travel restrictions

6

Selection of ALICE activities during first 4-weeks of re-start

ALICE phase 2 activities 205.05.20

• Cabling and connectors • Cooling and ventilation pipes • Patchpanels • Support structures • Installation tests …

Miniframe (Service support structure)

SX2 surface building P2 ALICE Cavern

• Inox cooling pipe installation • MFT cooling plant installation • Cabling and connectors • Rack turbine replacement • TPC heatscreens • TOF readout modules and cooling • Muon system electronics upgrade

ALICE experiment cavern Cleanrooms and workshops

• TPC commissioning SXL2 (P2) • ITS commissioning Bat. 167 (Meyrin) • Mechanical workshop Bat. 162 (Meyrin)

Bat 167

SXL2 surface building P2

7

ATLAS focus during first 4 weeks

• Highest priority

• New Small Wheel and Liquid Argon

• TDAQ upgrade (also as support for the other remote activities)

• BIS 7/8 muon spectrometer

• but also urgent maintenance on cryogenics and magnet

• and then

• SCT and Tile Calorimeter

• Phase II upgrade (ITK, HGTD and Tile)

Progress slowed down since

even some experts in the area

cannot yet access CERN.

8

CMS focus during initial period

• Warm-up of magnet ongoing (30 days)

• CSC removal and refit (P5-UXC, P5-SX)

• CSC electronics revision (867/904)

• GEM assembly and test (904, P5)

• HCAL control module diagnostics (904)

• Beam pipe/pixel/lumi monitor upgrade (P5,186)

9

Initial LHCb activities

• Vertex Locator

• Installation of RF foil, preparation done, in collaboration with EN and TE, week 19/20.

• Upstream Tracker

• Cleaning of CO2 cooling test station, together with EP-DT, started 30 April.

• RICH

• RICH 2 column installation in test rack and commissioning, in collaboration with EP-DT, started 4 May

• Muon

• Installation of new electronic boards, replacing old backplanes, cabling up control boards, registration into the DB, started 28 April

10

Gradual re-start of non-LHC experiments and activities

• NA-experiments, ISOLDE, AD-experiments begin some small activities after T0 (to allow e.g. progress on thesis work) where easily and safely feasible

• Re-start of the EP workshops to support experiments where needed

• IT will slowly bring back small teams to allow working from adequate work places

• Library will reopen once there is a sufficient population at CERN to warrant presence. All library staff can be contacted remotely in the meantime (btw: New INSPIRE rolled-out during Lock-down).

11

Conclusion

• Many activities continuing in home laboratories on sub-components

• Teleworking continues (analysis, simulation, engineering, documentation)

• Gradual re-start

• practicing social distancing and learning to work in space restricted areas

• progress difficult to predict while travel restrictions persist; experiments making efforts to circumvent bottlenecks

12