1. Status of the HiLumi DS and HL-LHC project
Lucio Rossi - CERN
HL-LHC Project Coordinator
LARP CM 18 - FERMILAB

2. Content Present LHC and luminosity evolution Reasons for the upgrade
Luminosity Upgrade: the main ingredients
FP7 HiLumi Design Study
Status
Further evolution: the Energy upgrade

3. Recap: lumi results 2011 @ 7 Tev c.o.m.

4. Program LHC next ten years

5. Many changes : IR Magnets (triplet, D1, D2, MQ4, …) SC Crab Cavities, IR Col, New Cryo IP1-IP5, Cold Powering on surface GW d.c. HTS

6. Where to intervene: > 1.2 km of LHC
Works all around the ring

7. The HL-LHC Work Packages
Collimation
Project
High Field Magnets R&D
Matching section and correctors
Study on HE-LHC gets wider support
EuCARD2 WP on HTS dipoles
HE-LHC Studies
Beam Diagnostics
Hardware Commissioning

8. LEP/LHC : the best use of the (renovated) existing infrastructure

9. Management WP7 Mach.Protection: R. Schmidt, J. Wenninger (CERN)
WP1
WP2
WP3
WP4
WP5
WP6
MNGT
Management & Technical Coordination
APP
Accelerator Physics & Performance
MAG
Magnet Design CC
Crab Cavities
COL
IR Collimation CP
Cold Powering
Coordinator
Lucio Rossi
CERN
Stephane Fartoukh
Ezio Todesco
Erk Jensen
Stefano Redaelli
Amalia Ballarino
Co-Coordinator
Oliver Bruning
Andy Wolski
UniLIV (UK)
Gianluca Sabbi
LBNL (USA)
Graeme Burt
UniLAN (UK)
Grahame Blair
RHUL (UK)
Francesco Broggi
INFN (IT)
WP7 Mach.Protection: R. Schmidt, J. Wenninger (CERN)
WP8 Coll-Exp Interface: A. Ball, M. Nessi, H. Burkhart , I. Efthymiopoulos (CERN)
Wp9 Cryogenics: L. Tavian, R. van den Weelderen (CERN)
WP10 (Energy deposition): F. Cerutti (CERN), N. Mokhoff (FNAL)
WP11 : 11 T Dipole : M. Karppinen (CERN, A. Zlobin (FNAL)
WP16 : HFM R&D & FRESCA2 dipole G. de Rijk (CERN), F. Kircher (CEA)
PLC chair O. Bruning
Technical Cootrdinator H. Schmickler (CERN)
Saftey, namely RP: S. Roesler (CERN)
Resource-Cost-Risk Coordinator : P. Bonnal (CERN)
FP7 HiLumi Administrative Manager: S. Stavrev (CERN)
Dissemination and outreach : K. Kahle (CERN)

10. Technical coordinator
Technical Board: define, with the Project Coordinator, his deputy and the Parameter and Lay- out committee chair, the technical baseline of the project, the accepted variants and the specifications. To this scope the TC will form and lead a Technical Board that will assess all the various technical systems proposed for the upgrade, their impact on machine performance and on machine availability and reliability.
LR BB compensating wires (1st meeting 15 May).
E-lens
Assist the Project Coordinator and his deputy in evaluating the resource, M+P, of the technical systems and making the optimization.
Remote Handling: Coordinate the various studies and development for tackling the problem of work on highly radio-activated areas and components: define a global plan, harmonize the various programs already going on, assure a coherent cost- effective approach, and promote the development of new techniques of remote manipulation and remote supervision/control. Assure the necessary link to the Safety Unit. And define the total cost and resource of such task.

11. Progress Use of CERN Machine Advisory Committee as HL-LHC SAC
1st Coordination Group HL-LHC/ LHC Exper.
2nd HL-LHC & LIU Joint Meeting
Main News from WPs
CERN Medium Term Plan (MTP, next 5 years) preparation and European Strategy update for HEP

12. Coordination Group
Attended at the highest level (Directors & Spokeperson and TCs)
Start organization of the Long Shutdowns (necessary for work planification and for budget request to agency).
Request LS1.5 form Jan 2017 by CMS
Request of 18 months LS2 in 2018 by Alice and LHCb
Atlas sticks to the official plan
Exp.
Observations
Actions
Responsible
ALICE
Plan to continue data-taking during HL-LHC with Lead at cm-2s-1 and possibly with other ions
Formal confirmation
Precise specifications
Preparation of accelerators’upgrade proposal
Physics/CERN direction
Experiment
LIU + HL-LHC
LHCb
Plan to continue data-taking during HL-LHC at cm-2s-1 with 25 ns bunch spacing
HL-LHC
CMS, ATLAS, LHCb
25 ns is prefered to 50 ns (pile-up)
Specify pile-up goal and then peak (levelling) luminosty
CMS & ATLAS
Next Meeting!

13. Status of beam characteristics at 450 GeV
25 ns bunch spacing is the baseline solution for HL-LHC. 50 ns is a back-up option if LHC cannot operate with 25 ns.
Use of Micro-batches is a spare option to fight LR effects and e clouds.
Quantification of injectors’performance
Injectors already deliver qib~1.2 for 25 ns (qib~1.7 for 50 ns)
After LS1, low emittance 25 ns beam with qib~2.2 could be available ( p/b in 1.4 mm): can it be used by LHC?
HL-LHC requires beams with qib~6. Estimated injectors’potential after upgrades is qib~4.
Collider related
Injectors’ related
(qib factor normalized to «nominal beam»)

14. Conclusions
In theory*, not totally impossible to approach HL-LHC request for both 25 and 50 ns, providing
Losses and blowup can be reduced to “stretch” levels (25 and 50 ns)
PS can run with higher space charge tune shift, nearer DQ ≈ with 180 ns bunch length, and PSB can run with DQ ≈ (mostly for 25 ns)
PS longitudinal stability can improve significantly above present expectation (today at p/b, LIU baseline p/b, need p/b) (for 50 ns)
SPS can increase brightness limit, to DQ ≈ (for 50 ns)
Also.... taking for granted that all planned upgrades are fully effective, and that single bunch limits can be approached with bunch trains…

15. HL-LHC Performance Estimates
Putting it all together:
minimum b*
and
p/beam
Parameter
nominal
25ns
50ns N
1.15E+11
2.2E+11
3.5E+11 nb
2808
1404
beam current [A]
0.58
1.12
0.89
x-ing angle [mrad]
300
480
550
beam separation [s] 10
b* [m]
0.55
0.15
en [mm]
3.75
2.5
3.0
eL [eVs]
2.51
energy spread
1.20E-04
bunch length [m]
7.50E-02
IBS horizontal [h]
80 -> 106
20.0
20.7
IBS longitudinal [h]
61 -> 60
15.8
13.2
Piwinski parameter
0.68
2.54
2.66
geom. reduction
0.83
0.37
0.35
beam-beam / IP
3.10E-03
3.9E-03
5.0E-03
Peak Luminosity
1 1034
sufficient room for leveling
(with Crab Cavities)
Virtual luminosity (25ns) of
L = 9 / cm-2 s-1
= cm-2 s-1 (‘k’ = 5)
Virtual luminosity (50ns) of
L = 9 / cm-2 s-1
= cm-2 s-1 (‘k’ = 10)
50ns beam option provides HL-LHC performance levels at ultimate total beam currents; only the ‘large beta*’ option reaches beam-beam limit; IBS growth rates are a concern!; low beta option has 50% higher performance potential
(Leveled to cm-2 s-1
and cm-2 s-1)
Events / crossing 19
171
340 95
2nd LIU-HL-LHC Brainstorming meeting 30 March 2012 15
Oliver Brüning BE-ABP

16. Progress from WP2 - APP A certain degre of reorganisation
Clsoer work with the magnets for the basic choice of magent aperture
New organistion on B-B task (led now by Alexander Valishev, Fermilab, wih the support of T. Pieloni, CERN)
Active for accomodating LHCb request
Proposal of a new absorber in front of D1 for lumi increase before LS3 (meeting 15 May) …

17. Progress from WP3 - Magnets
Stidies for evlauation 140 vs. 150 mm Low-beta triplet done
Strong coupling of LARP-CERN to make a common plan
Entering of CERN also in the design- construction Phase

18. Progress from WP4 - Crab Cavity
Desing: choice of 1.9 K cryogenics
Reject by J-Lab of the polishing of the Lancaster produced Nb Crab Cavity!
Done in CERN with some delay…
The WP on Magnet Protection has started real work on CC with a first meeting
Forming as team around Rama

19. SC RF Crab cavities in hardware mode…

20. Progress from WP5 - Collimators
Slowing handing over from Ralph to Stefano (formally 1st Sept, for FP7 DS altready in act)
Rexamiantion of the construction plan for LS1
Vigorous start of an integration study led by Stefano on the effective need and configuration for the DS cryocollimation (P2 as first? P3 and P7 may be not necessary?) …

21. Other WPs
Sc test facility for 20 m SC link (variable temperature, 20 kA) is being commissioned at CERN.
Agrement on Sc between CERN and IASS (Potsdam, D)
Energy deposition, going on with the modelling, also for LHCb (TAS needed?)
11 T dipole demonstrator, 2 m single bore, near to be tested!

23. Preparing the EU Strategy update on HEP
CERN is preparing the paper to submit to the EU group of scientists that are in the panel
By July the propsal to the group (Machine and Detectors separateley, but connected). Physics motivation must be there
HL-LHC should be first priority for the next decade
R&D continued (started) in 2012 for HE-LHC
In round of the EU strategy update the decisoj among CLIC/ILC and HE-LHC (and/or LHeC or LEP300)

24. For MTP 2013-2017: Project split into improving consolidation and full performance
Improving conmsolidation
Removal and change of the triplet
Cryogenics
Collimation
Sc Links
Fuil performance
Full aperture low- beta triplet
Crab Cavities
Full cryogenics
Full collimation

25. Possible (optimistic performance) in the twop scenarii

26. Halving time and Doubling time

27. Resource evaluation and splitting

28. Cost recap Improving Consolidation Full performance Total HL-LHC
Improving Consolidation
Full performance
Total HL-LHC
Mat. (MCHF)
476
360
836
Pers. (MCHF)
182 31
213
Pers. (FTE-y)
910
160
1070
TOT (MCHF)
658
391
1,049

29. Material budget HL FP7 HiLumi
2012
2013
HL-LHC Project
12,535
17,069
Project Management & Technical Coordination
744
300
Accelerator Physics and Performance
170
250
Magnets for IRs (Inter.Regions and Match. Sections)
3,181
3,875
Crab Cavities (CC)
500
1,150
Collimation project
Cold Powering
1,000
3,100
Machine Protection & Magnet QPS
Collider-Experiment Interface 50
220
Cryogenics
400
1,450
Energy Deposition & Absorber
200
11-T Dipole Two-in-One for DS
3,010
2,860
Vacuum
Beam Diagnostics
570
Integration and (de-)installation
Hardware commissioning
Infrastructure, Logistic and Civil Engineering
HE-LHC Studies
370
860
High Field Magnet R&D - FRESCA2 - FP7Eucard
2,610
2,234
2012
2013
289.4
291.8
10.0
36.6
12.2
212.3
18.3
0.0
2.4
The 0 in collimation means that its budget in remains under «Consolidation»
For example Crab cavities this year will have (FP7) = 710 kCHF to spend in 2012!
Start of targeted resources for HE-LHC

30. Next HiLumi/LARP Joint Meeting 14-16 November in Frascati!!