Chamonix summary of session 6 on the hl lhc upgrade
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Chamonix Summary of Session 6 on the HL-LHC upgrade. Organized by O . Brüning and Paolo Ferracin together with all the speakers. Summary of Session 6 on the HL-LHC. Session Overview:.

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Chamonix Summary of Session 6 on the HL-LHC upgrade

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Chamonix summary of session 6 on the hl lhc upgrade

Chamonix Summary of Session 6 on the HL-LHC upgrade

Organized by O. Brüningand Paolo Ferracin

together with all the speakers

Summary of Session 6 on the HL-LHC


Session overview

Session Overview:

  • The Session featured 6 presentations with 20min presentation and 10 min of discussion for each presentation:

    • HL-LHC Parameter and Lay-out Baseline  Paolo Fessia

    • HL-LHC Magnet Roadmap  EzioTodesco

    • HL-LHC RF Roadmap  Rama Calaga

    • HL-LHC alternative scenarios, parameters and lay-out  Rogelio Tomas

    • Collimation and MP Roadmap  Stefano Redaelli

    • Down Selection Criteria and MDs Prior to LS3  GianluigiArduini

Summary of Session 6 on the HL-LHC


Chamonix summary of session 6 on the hl lhc upgrade

Cryoplant

IP 1,5

P

I

C

BIS

CB

Magnet system

MQXFA MQXFB, MBXF, MBRD, MQYY,

Q5 1.9, Q6 1.9

MCBXFB, MCBXFA, MQSXF, MCTXF, MCTSXF, MCDXF, MCDSXF, MCOXF, MCOSXF, MCSXF,MCSSXF,

MCBRD, MCBYY

Warm compressor and other surface eq.

Cryo line

Alignment

IP 1,5

DS Collimation pp (TBC RUN II)

QPS2

Interaction Region and MS

DS Collimation pp (TBC RUN II)

DS Collimation for ion

IP 1,5

IP 2

IP 7

SC link/powering

IP 7

IP 1,5

SC link/

Powering

arc

EE

TAXS, TAXN

DF(X-M) +

SC Link DSH (X-M)

DFH(X-M) +

Power converters

Collimation(TCTPM, TCL, TCLM, TCTP)

Rad-hard electronics for

BLM and BPM

Beam vacuum

RF system

Loads, circulators, RF power, LLRF, HVPS, central LLRR

Beam diagnostic

BPMSQW, BMPSQ, BPMSQT, BMLC

Crab Cavity cryomodules

CC diagnostic and protection

Cryo-bypass+TCLD

Cryo-bypass+TCLD

Cryo-bypass+TCLD

H.F. dipoles

H.F. dipoles

DFHA +

Power converters

H.F. dipoles

DFA+

SC Link DSHA

Talk 1:

Paolo Fessia

Hor. SC L. DSH + DFA

Power converters

New DSLM for Q6

Summary of Session 6 on the HL-LHC


Chamonix summary of session 6 on the hl lhc upgrade

CS Baseline collection completedeach system/equipment with Conceptual Spec, presently 90 document recorded

Talk 1:

Paolo Fessia

Summary of Session 6 on the HL-LHC

Courtesy of I. Bejar Alonso, S. Chemli


Lay out

LAY OUT

  • Last bits being frozen (correctors for D2 Q4)

2008

2022

Talk 2:

EzioTodesco

Summary of Session 6 on the HL-LHC


Contents hl lhc ir magnets

CONTENTS: HL-LHC IR MAGNETS

Separationdipole D1 (KEK)

Triplet QXF (LARP and CERN)

Skew corrector (INFN)

Orbit corrector (CIEMAT)

Talk 2:

EzioTodesco

Corrector sextupole (INFN)

Corrector octupole (INFN)

Recombinationdipole D2

(INFN design)

Q4 (CEA)

Corrector dodecapole (INFN)

Cross-sections in scale

Corrector decapole (INFN)

Summary of Session 6 on the HL-LHC


11 tesla idea

11 TESLA: IDEA

Talk 2:

EzioTodesco

  • Idea: replace a 8.3 T Nb-Ti dipole with 11 T Nb3Sn dipole

    • This leaves enough space for a 0.8 m long room

      temperature collimator

  • One dipolereplaced by two 5.5-m-long dipoles plus r.t. collimator

    • 4 unitsneeded for IP2 in LS2 – first Nb3Sn seeing a beam!

    • 8 unitsneeded for IP7 in LS3

      • Up to 16 more unitscouldbeneeded at IP5 and IP1 in LS3

[Baseline program

of WP5 for Col

Upgrade]

Summary of Session 6 on the HL-LHC


Chamonix summary of session 6 on the hl lhc upgrade

[Studies for ‘Option 0’ of Crab Kissing scheme ongoing]

  • Required for longit.

  • bunch shaping

Talk 3:

Rama Calaga

Summary of Session 6 on the HL-LHC


Chamonix summary of session 6 on the hl lhc upgrade

Talk 4:

Rogelio Tomas

Summary of Session 6 on the HL-LHC


Chamonix summary of session 6 on the hl lhc upgrade

Talk 4:

Rogelio Tomas

Summary of Session 6 on the HL-LHC


Chamonix summary of session 6 on the hl lhc upgrade

MoGraphite

DS Collimators

E-lens & altern

Talk 5:

Stefano Redaelli

Summary of Session 6 on the HL-LHC


Chamonix summary of session 6 on the hl lhc upgrade

Talk 5:

Stefano Redaelli

Summary of Session 6 on the HL-LHC


Nominal scenario areas for md studies during runii

Nominal Scenario: Areas for MD studies during RunII

  • Collide & Squeeze

  • Dynamic Aperture

  • Flat Optics

Talk 6:

GianluigiArduini

  • Some of the challenges:

    • Low b* optics with well behaved chromatic properties

    • Electron cloud effects with 25 ns beams

    • Large crossing angle and Crab Crossing to minimize the geometric reduction factor and pile-up density (SPS tests)

    • b* levelling

    • Large beam-beam tune spreads

    • Beam Halo Measurement and Control particularly to cope with possible crab cavities failure scenarios.

    • Stability and Minimization of impedance

Summary of Session 6 on the HL-LHC


Main points from the q a sessions

Main Points from the Q&A sessions:

It is important to quantify the required availability and efficiency for reaching HL-LHC performance and to check these for all LHC systems (high reliability machine!)

Stochastic Cooling (for Ion operation) is not in the HL-LHC Baseline

Need for prioritization of MS upgrades not yet in the baseline (e.g. new Q5 in IR1 & 5) and identification of resulting performance limitations.

Need for clarification of ‘ultimate’ HL-LHC performance.

Issue of small series production and risk mitigation (multiple producers).

Need for clarification of spare RF components for new HL-LHC equipment.

Interplay of 200MHz LH RF system and 400MHz Crab-Cavities (non-linearity).

Are there plans for testing Crab Cavities in the LHC after the SPS tests and before HL-LHC?  Have been looked at at IP4 but would have impact on schedule!

Preferred luminosity levelling method  dynamic low-beta and NOT Crab cavities

Summary of Session 6 on the HL-LHC


Chamonix summary of session 6 on the hl lhc upgrade

Summary of Session 6 on the HL-LHC


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