LS2 and Run 3 Schedule - Status of the Experiments - Eckhard Elsen Director Research and Computing - CERN ...

LS2 and Run 3 Schedule - Status of the Experiments
Eckhard Elsen
Director Research and Computing

 LHC RRB Meeting, Oct 26-28, 2020

Physics results

ICHEP 2020 in Prague – virtually

 • schedule adapted to best fit all time zones
 • 3019 registered participants
 • webcasts
 • zoom sessions with breakout rooms
 • Mattermost channels actively used
 • …

 3

à L Bianchi
 A Large Ion Collider Experiment
 A Large Ion Collider Experiment
 macroscopic properties
 Spin Spin alignment
 alignment of vectorof vector
 mesons mesons
 in rotating in spinning QGP
 QGP
 K*0 PRL 125 (2020) 012301
 Angular momentum à L Bianchi
 A Large Ion Collider Experiment

 Spin alignment of vector mesons in spinning QGP
 K*0
 Impact parameter
 direction

 beam direction
•• Large angular momentum L in non-central collisions
 Large angular momentum L21in non-central collisions à
 à rotating QGP (~10 revolutions
 rotating QGP (~ 10 revolutions per second)
 21 per second)
•• Spin-orbit
 spin-orbit
 • interactions
 interactions
 Large expected
 angularexpected
 momentum to quarks
 to polarize polarisecollisions
 L in non-central quarks
•• à rotating QGP (~10 21 revolutions per second)
 IfIfquarks recombine to produce vector mesons (spin=1),
 quarks recombine to produce vector mesons
 spin •
 (spin=1),Spin-orbit
 spin
 alignment interactions
 alignment
 could expected
 appear could to polarise quarks
 appear
 • If quarks recombine to produce vector mesons
•• Measurement
 Measurement using using
 K* 0àK K*
 p
 0 à Kpshows
 decays decays
 a 3s shows a
 effect
 (spin=1), spin alignment could appear
 at3sloweffect
 momentum at low (Runmomentum
 1 data) 0
 • Measurement using K* à Kp decays shows a
•• Confirmed
 Confirmed 3swith with
 effecthigher higher
 at significance
 significance
 low momentum with preliminary
 with preliminary
 measurement
 measurement
 • withon
 Confirmed Run Run
 with 2higher
 data2 data
 significance with preliminary
 measurement on Run
 Luciano Musa (CERN) | CERN SPC | 21 September 2020
 2 data arXiv:1910.144087 4
 arXiv:1910.14408

5

H → 
 a t e d
 o b o r
 c o r r
 e n t s u l t
 u r e m S r e
 a s A
 Me y ATL
 b
Measurement of H → 
(full run 2 data)
•four components targe5ng ggH, VBF, VH, and ;H
•similar sensi5vity for ggH and VBF:
 ➡ggH => highest X-sec
 ➡VBF signature provide extra sensi5vity
•results combined with Run1 data at 7and 8 TeV (for MH=125.38 GeV)
•analysis largely based on advanced machine learning techniques
First ever evidence:

 6
 21/09/2020 SPC319 - CMS Status report 18

Observation of Time-dependent CP Violation in B 0
 s
 Paper in preparation
• 0 + -
 B s→K K , CPV Observation (>5σ) LHCb-PAPER-2020-029

 • Constraints on
 CKM γ and -2βs

 t te r
 t i Ma
 -
 – A n
 t t e r t i o n
 M a i l l a
 Osc

 • Powered by key attributes of LHCb experiment
 Time resolution – VELO
 Particle Identification π/K - RICH 7
 16

Shutdown work

A Large Ion Collider Experiment

TPC reinstallation in the ALICE cavern (3-6 August 2020)

Alignment of the TPC to the transfer rails
 Beampipe installation
Luciano Musa (CERN) | CERN SPC | 21 September 2020 20 9

Many ongoing activities on the detector systems...
 - excellent progress made during CERN restart phase -

 Installation of interface boards for the
 LAr Phase-I system

 ATLAS Weekly, 2nd June 2020 5

K. Jakobs, SPC Meeting, CERN / video, 21st September 2020 5 10

11

Upgrade I: Detector Status

 VELO SciFi
Infrastructure modules assembly
 RICH2
largely in
 columns
place
 completed
UT
 ECAL, Muon
modules
 modifications

 • Strong progress across systems
 • Major procurement completed
 • All systems in assembly/installation
 12
 4

Conclusion LS2 and Run 3 Scheduling Meeting of June 8, 2020

Summary by Experiment of Cavern Closure after LS2 as of June 8
 Summary of when experiments can be
 d
 ready to close caverns
 2021 after LS2 2022 w i l l b e r e vi
 2
 s
 0
 i te

 Large uncertainties as discussed in experiments presentations u l e , 2 0
 c h e d r 2 3
 J F M A M J J A S O N D J F S t o b e
 O c
 LHC com. w/
 H/W commissioning Training rampup l d
 (3mth shift) beam y i e
 o u l d
 ALICE e s h u n 3
 e l i n R
 a s 1 in
 B 0 f b-

 ~ 1 9
 ATLAS
 (no NSW-C)
 ATLAS*
 (w/ NSW-C) Baseline
 CMS Shielding work.
 needed for HL R3

 LHCb Fallback option
 (no NSW-C)
 CMS can be ready for beam by Oct 1st, but would then need 21/22 EYETS to install shielding
 before HL R3 running.
 Current hope is NSW-C could be installed with ATLAS ready for beam Feb 1st 2022 (TBC). 14
 7

Jun
 e8
 ,2
 Executive Summary from LHC and Experiments meeting 02
 0
 Low intensity beam test
 • Experimental caverns closed 1.2.2022 and begin of luminosity operation
Baseline

 • Allows completion of Phase I upgrades (including NSW-A and NSW-C) and CMS shielding
 • Test run end of September 2021 with low intensity if feasible with ATLAS detector open
 • Review of Baseline end of October 2020
 • If NSW-C not deemed ready for installation by the end of 2021, and Beam pipe installed with ATLAS in open position 12

 taking into account revised LHCb upgrade schedule ATLAS in open position
Fallback

 • Closure will be advanced to Nov 2021
 • Remaining CMS shielding will be installed in 21/22 YETS
 • Low intensity beam test run will be dropped
 • NSW-C will be installed in LS3
 • As before a short extension of the 2023/24 YETS will be needed for LS3 preparation work
 • LS3 schedule remains unchanged
 • Injectors and fixed target physics programme starting as early in 2021 as possible

 15

Conclusion LS2 and Run 3 Scheduling Meeting of October 23, 2020

Huge progress in many areas!

 • Excellent ramp-up of activities after CERN re-opening

 • Large progress as well on the trigger processor
 (firmware development and commissioning proceeded during lockdown);
 Trigger functionality demonstrated for both sTGC and MM chambers

 • Secured person power resources from nearly all the NSW / Muon institutes,
 and CERN (7 FSUs, so far until end of 2020)

 à Resource-loaded schedule for NSW-A and NSW-C activities;

 Commitments and support are needed throughout 2021 (incl. CERN support)

 • Strong support by ATLAS Technical Coordination

ATLAS Input on LS2 / Run-3 Planning, 23rd October 2020 4

Short summary on NSW activities
- sTGC production for NSW-C:
 Chamber production restarted at all sites;
 Finished in China, well advanced in Israel and Russia;
 Production in Canada and Chile will continue until April / May 2021;
 Mitigation: part of the production has been moved from Chile to Israel

- MM production for NSW-C:
 Production completed in Frascati (last week); Munich à end November
 Projected end date for large sectors (Dubna, Saclay): May 2021
 Remaining HV issues on large sectors (also for NSW-A) despite passivation;
 à Can be operated at lower voltage;
 2nd post-Covid sTGC wedge (5th June)
 Given large redundancy, the corresponding efficiency loss is acceptable

 Mitigation: - Granularity of HV supplies increased
 - Studies on using 2% admixture of isobutane to Ar:CO2 continue
 - Repair facility set up at CERN (“chamber hospital”)

- Wedge assembly: well advanced at CERN, keeps up with chamber
 delivery and test
 NSW-A: small sectors: 15/16 sTGC wedges and 8/8 MM double wedges
 large sectors: 15/16 sTGC wedges and 6/8 MM double wedges Electronics test s in BB5 at CERN
ATLAS Input on LS2 / Run-3 Planning, 23rd October 2020 5

Schedule – top level key detector components
 • Latest possible schedule compatible with February 2022 cavern closure
 – this is not the aim, this is the
 pessimistic planning on unblocking
 travel from SciFi institutes only by
 use king ways
 his ood
 e

 March 1st 2021
 tim
 g
 d
 of m fin

 – Without this unblocking a full
 e to

 of t
 a

 SciFi project restructuring would
 Hav

 be needed, this will be studied

• This schedule is driven by SciFi C-side insertion
 – required for insertion and bake-out of beam-pipe
 – Beam-pipe insertion only just compatible with an LHC beam test in Sept/Oct. 2021
• If SciFi advances, VELO/UT would drive schedule
 9

Summary of COVID-19 impact

• Still significant uncertainties from COVID-19 impact

• November 2021 restart no longer looks feasible

LPC Run 3 Luminosity Prediction
 4

Luminosity comparison depends crucially on how efficient 2022
will be without a p-p run in 2021
 For 2021, efficiency was assumed to be ~40% of normal year (i.e. 20%
 SB) and in addition it has low beam intensity due to LIU ramp-up
 For 2022 LIU ramp-up well underway, so assume quick to reach 2018 perf.
 Still expect lower LHC efficiency without ramp-up in 2021
Have assumed 60% efficiency for 2022 and 13 week ramp-up
A month delay in restart or 40% efficiency in 2022 costs 10-15/fb

 Pre-covid luminosity
 assumed for 130 days
 at 100% eff. (apart 2021)

 2021 10/fb
 2022 70/fb
 Eff. in 2022 2023 80/fb

 Unchanged 2024 85/fb
 since June

Summary of Meeting October 23, 2020

 in g
 n n
 R u 2
 C 0 2
 L H y 2
 m e ar
 u
 s Feb r u
 e
 R n
 i

Some statistics on COVID-19 cases in Host States
• Number of active cases rapidly increasing in both
 France and Switzerland

 • contact restricting measures being implemented

 • masks, partial curfew in departement de l’Ain,
 limiting the number of people in groups, etc.

• Test methodology is differing in host states

 • many more tests than in spring 2020; capacity
 in hospitals so far coping…

COVID-19 situation at CERN
• Number of positively tested cases as of October 23, 2020

 • 72 members of personnel and

 • 24 contractors / temporary personnel

• To date, there is no evidence of transmission on site

 The measures implemented at CERN seem to work.
 CERN is a relatively safe place.

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Policy adopted

• There is a huge interest to avoid another complete lock down in the (host)
 countries

• CERN has demonstrated to function through the phases of the pandemic with
 a wide range of

 • hygiene and distancing measures (including quarantine of exposed teams)

 • dedicated access schemes to avoid high density of people (teleworking,
 access priority etc.)
 2 w o r k
 t he L S
 s e e . g.
 r i or i t i
 P

Support from External Institutes

• Safety first - we have to protect the health of individuals

• Travel restrictions and quarantine requirements have made it very difficult to
 support the experiments

 • Indispensable experts have to find a way to share their knowledge

 • being available at the site (with all protective measures)

 • instruct local experts remotely. Locally we will make an effort a k i ng
 s o f m
 to find suitably skilled colleagues i n d w a y
 u s u a l
 e d t o f o f u n
 Ne e s p i t e
 r es s d
 p ro g u a t i o n
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