LHC Overview & Status Click to edit subtitle style R. Alemany - - PowerPoint PPT Presentation
A T L A S A BI L I C E CMS PIC Coll PC RF C r y o LHC Vacuum S D B Magnets L L H QPS C b TOTEM LHC Overview & Status Click to edit subtitle style R. Alemany (CERN AB/ OP/LHC) WAO'07 R. Alemany (CERN Les
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OP/LHC) WAO'07 Vacuum RF PC Magnets C r y
L B D S BI Coll PIC LHC CMS A T L A S A L I C E L H C b TOTEM
Les Houches Seminar
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
l Quench Protection
l Power Interlock
l Energy Extraction
L H C A T L A S C M S L H C b A L I C E
5.
Overall Strategy for Commissioning:
l
HW Commissioning
l
Machine Checkout
l
Beam Commissioning
l
Stage A
l
Stage B
l
Stage C&D
7.
Documentation & Human Resources
8.
Conclusions
OP/LHC) WAO'07
CMS
ATLAS
LHCb ALICE
1 2 3 4 5 7 8 6
SPS
L I N A C 2 CPS PSB
T
LINAC2 0.12 30 PSB 1.4 157 CPS 26 628 = 4 PSB SPS 450
8.7 T 11.8 kA / 7 MJ 1.9 K 1232 cryodip.
L H C A T L A S C M S L H C b A L I C E
B2 Dump B1 Dump
OP/LHC) WAO'07
L H C A T L A S C M S L H C b A L I C E
He inventory per sector
LHC TDR
+ 1260 T LN2 per sector
OP/LHC) WAO'07
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07
L H C A T L A S C M S L H C b A L I C E LHC TDR
4.5 K 1.9 K War m Separation/ Recombinati
Matching Quadrupoles Inner Triplet 1.9 K
OP/LHC) WAO'07
L H C A T L A S C M S L H C b A L I C E
MBB: Main Dipole MQ: Main Quadrupole MQT: T rim Quadrupole MQS: Skew Trim Quadrupole MO: Lattice Octupole MSCB: Sextupole (Skew Sextupole)+Orbit Corrector MCS: Spool Piece Sextupole MCDO: Spool Piece Octupole + Decapole (BPM: Beam Position Monitor)
LHC TDR
1.9 K
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
l Quench Protection
l Energy Extraction l Power Interlock
L H C A T L A S C M S L H C b A L I C E
5.
Overall Strategy for Commissioning:
l
HW Commissioning
l
Machine Checkout
l
Beam Commissioning
l
Stage A
l
Stage B
l
Stage C&D
7.
Documentation & Human Resources
8.
Conclusions
OP/LHC) WAO'07
LHCb CMS ATLAS ALICE LHC
… an aircraft carrier at battle- speed of 55 km/h
More important than the amount of energy is …
the energy of ~3 T
the energy of 370 kg dark chocolate
L H C A T L A S C M S L H C b A L I C E
~ 11 GJoule (only in the main dipoles*)
corresponds to …
* 400 MJ in the main
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
During magnet test campaign, the 7 MJ stored in one magnet were released into
P . Pugnat
If not fast and safe …
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
l
A Quench is the phase transition of a super-conducting to a normal conducting state
l
Quenches are initiated by an energy release of the
l
Movement of the superconductor by several m (friction and heat dissipation)
l
Beam losses:
l @7 TeV 0.6 J/cm3 can quench a dipole; this
energy density can be generated by 107 protons
l @450 GeV (injection energy), ~ 109 protons
are needed
l
Failure in cooling
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
l
To limit the temperature increase after a quench
l
The quench has to be detected ı Quench Detectors*
l
The energy is distributed in the magnet by force- quenching the coils using Quench Heaters*
l
The stored energy is released in a controlled way Cold by-pass diodes* & Energy Extraction System
l
The magnet current is switched off within << 1 second Power Interlock System
l
Failure in QPS:
l
False quench detection: down time of some hours
l
Missed quench: damage of magnet, down time 30 days
L H C A T L A S C M S L H C b A L I C E
* On every SC magnet
Que nc h Pr
ec tio n Sy st e m
OP/LHC) WAO'07
L H C A T L A S C M S L H C b A L I C E
L1 (SC Magnet)
Cold diode
R (Energy Extraction) Switch Power Converter L2 (SC Magnet) L154 (SC Magnet) LHC Main Dipole System in one sector R Quench Detectors ı V1-V2 ≠ 0 Quench Heaters
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
L H C A T L A S C M S L H C b A L I C E
every ramp down of the magnets implies energy extraction, but this takes ~20 min case of a quench
Extraction System for quench protection is needed
24 13kA main circuits (dipoles & quadrupoles) (+ the EES for the 600 A correctors)
energy in 104 s for the dipoles (-125 A/s) and in 40 s for the quadrupoles Switches Resistors
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
L H C A T L A S C M S L H C b A L I C E
(warm magnets also have PICs)
Power Converters QPS Cryo UPS, AUG
If circulating beam
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
l Quench Protection
l Power Interlock
l Energy Extraction
L H C A T L A S C M S L H C b A L I C E
5.
Overall Strategy for Commissioning:
l
HW Commissioning
l
Machine Checkout
l
Beam Commissioning
l
Stage A
l
Stage B
l
Stage C&D
7.
Documentation & Human Resources
8.
Conclusions
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
25 ns
Ebeam = Ep+ x Kb x Num p+/bunch
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07
LHCb CMS ATLAS ALICE LHC
0.01 0.10 1.00 10.00 100.00 1000.00 10000.00 1 10 100 1000 10000
Momentum [GeV/c] Energy stored in the beam [MJ]
LHC top energy LHC injection (12 SPS batches) ISR SNS LEP2 SPS fixed target HERA TEVATRON SPS ppbar SPS batch to LHC
Factor ~200
RHIC proton LHC energy in magnets
Increase with respect to existing accelerators :
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
~ 8 m concrete shielding Beam Dump Block (graphite)
Beam Dump Block Septum magnet deflecting the extracted beam 15 kicker magnets H-V kicker for painting the beam
IR6
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC Beam +/- 3d 56.0 mm
1 mm
+/- 6 = 3.0 mm
L H C A T L A S C M S L H C b A L I C E
E.g. Settings of collimators @7 T eV with luminosity optics Very tight settings orbit feedback!!
Collimation System Functionality:
quenches
they protect the equipment and
Threshold Beam Interlock Beam Dump
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
l Quench Protection
l Power Interlock
l Energy Extraction
L H C A T L A S C M S L H C b A L I C E
5.
Overall Strategy for Commissioning:
l
HW Commissioning
l
Machine Checkout
l
Beam Commissioning
l
Stage A
l
Stage B
l
Stage C&D
7.
Documentation & Human Resources
8.
Conclusions
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
LHC Beam Interlock System Powering Interlock System BLMs aperture BPMs for Beam Dump LHC Experiments Collimators / Absorbers NC Magnet Interlocks Vacuum System RF + Damper Beam Energy Tracking Access Safety System Quench Protection Power Converters Discharge Switches dI/dt beam current Beam Dumping System AUG UPS DCCT Dipole Current 1 DCCT Dipole Current 2 RF turn clock Cryogenics
Beam Dump Trigger
Beam Current Monitors
Current
BLMs arc BPMs for dx/dt + dy/dt dI/dt magnet current
Energy
SPS Extraction Interlocks Injection Kickers Safe LHC Parameters
Energy
Timing
essential circuits auxiliary circuits
Screens
SafeBeam Flag Energy
TL collimators Software Interlocks Software Interlocks Operators
L H C A T L A S C M S L H C b A L I C E
Green = ready before first beam
OP/LHC) WAO'07
L H C A T L A S C M S L H C b A L I C E
User ‘Permit’ Signals USER SYSTEMS
LHC Beam Dump System Beam ‘Permit’ Signals
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
l Quench Protection
l Power Interlock
l Energy Extraction
L H C A T L A S C M S L H C b A L I C E
5.
Overall Strategy for Commissioning:
l
HW Commissioning
l
Machine Checkout
l
Beam Commissioning
l
Stage A
l
Stage B
l
Stage C&D
7.
Documentation & Human Resources
8.
Conclusions
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC LHCb CMS ATLAS ALICE LHC
Stage A B C D No beam Beam
Thorough commission of technical systems: Magnets, vacuum, cryo, PC, quench detection, energy extraction, RF, beam instrumentation, kickers, septa, collimators, absorbers, etc. Services: AC distribution, water-cooling, ventilation, access control, safety, etc. Stages:
2.
Individual system test
3.
Global system test Commissioned energy:
6.
2008 Eb = 5.5 T eV (no training quenches)
7.
2009 Eb = 7 T eV (magnet training required)
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
Stage A B C D No beam Beam
Machine Checkout
Drive all systems through the standard
Check Control System functionality from CCC high-level software applications Check beam instrumentation acquisition chain Check timing synchronization Check all equipment control functionality Check machine protection and Stages:
2.
Individual system test. First integration into the OP group
3.
Multi-system test, e.g. Machine Protection (BLM, BIS, LBDS)
4.
Dry run: drive the whole machine through the nominal sequence.
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
Stage A B C D No beam Beam
Stage D: 25ns operation II l Push towards nominal performance l Requires hardware updates: collimators and beam dump system l Performance goal: 1034 cm-2s-1
Beam Commissioning
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
l LHC Design Parameters:
0.55, 0.55, 10, 10 285
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
l
Start as simple as possible
l
Change 1 parameter (kb, N, *) at a time
l
All values for:
l
nominal emittance
l
7 T eV 2 m * (IP: 1&5)
Obj100f k L Cross EvtRate
b TOT
σ = /
Protons/beam ≤ 1013 (LEP beam currents) Stored energy/beam ≤ 10MJ (SPS fixed target beam)
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
2000 4000 6000 8000 10000 12000
2000 4000 time from start of injection (s) dipole current (A)
Phase A.8: Snap-back & Ramp Phase A.10: Collisions Phase A.11: Squeeze Phase A.9: T
Phase A.1: Injection and first turn Phase A.2: Circulating pilot Phase A.3: Initial commissioning Phase A.4: Optics checks Phase A.5: Increasing intensity Phase A.6: T wo beam
Phase A.7: Collisions 450 GeV
7 T eV
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07
8 to 10.08.2008
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07
l
Achieved
l
Synchronization SPS – LHC
l
Beam 1 injected IP2
l
Through to collimators in IP3 first shot
l
Trajectory correction
l
Kick-response measurements
l
Off-energy measurements (dispersion)
l
Explored the aperture
l
Quench
l
Discovered
l
Aperture restriction in the injection line
l Traced to misaligned vacuum pump l
Optics problem IP3
l Polarity convention QTL
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07
L H C A T L A S C M S L H C b A L I C E
22-24.08.2008
OP/LHC) WAO'07
L H C A T L A S C M S L H C b A L I C E
l
Achieved
l
Beam 2 injected IP8
l
Through to collimators in IP7 first shot
l
T rajectory correction
l
Kick-response measurements
l
Off-energy measurements (dispersion)
l
Explored the aperture
l
Beam 1 injected IP2
l
Through to collimators in IP3
l
Aperture in injection region OK
l
Polarity correction confirmed
l
Interleaved injection
l
Discovered
l
Optics problem at the end of the TI8 line
OP/LHC) WAO'07
5 – 7.09.2008
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07
l
Achieved
l
Beam 2 injected IP8
l
Threaded to dump in IP6
l
Steered then inject and dump
l
Beam 1 injected IP2
l
Threaded through to coll in IP5
l
Discovered
l
Optics problem in IP7
l Polarity convention on Q6 l
Optics problem in IP4
l Polarity convention
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07
10.09.2008
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07
l Beam 1 injected IP2 l Threaded around the machine in 1h l T
l Beam 2 injected IP8 l Threaded around the machine in 1h30 l T
l Q and Q’ trims gave a few hundred turns
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07
p p s D x x
x
∆ = ∆ ) (
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07
l
All done in 3 days
l
Made possible by
l
Meticulous preparation
l Magnetic model data l Sophisticated settings generation l Dry runs l Injection tests l
Powerful control system (LSA)
l
Powerful instrumentation working very quickly
l
Logging a multitude of parameters
l
Allowed
l
early look at several machine parameters
l
systematic check of orbit system
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
Circulating beam Injection First turn 450GeV initial 450GeV 2 beams Circulating beam Injection First turn 450GeV initial 450GeV
450GeV Increase I Snapback Ramp Top energy checks Top energy Collisions Snapback Ramp Top energy checks Squeeze Squeeze Pilot physics Squeeze both beams Beam 2 Beam 1 2 beams 450GeV Collisions
Dipoles OFF 450GeV
450GeV Increase I Ramp both beams
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
l Relaxed crossing angle (250 l Start un-squeezed l Then go to where we were in stage A l All values for
l
nominal emittance
l
7 T eV
Protons/beam ≈ few 1013
2 *
2 1 / 1 + = σ σ θ
z c
F
Stored energy/beam ≤ 100 MJ
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
Protons/beam ≈ 1014 Stored energy/beam ≥ 100 MJ
l Nominal crossing angle (285 l Start un-squeezed l Then go to where we were in stage B l All values for
l
nominal emittance
l
7 T eV
l
10m
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
l Quench Protection
l Power Interlock
l Energy Extraction
L H C A T L A S C M S L H C b A L I C E
5.
Overall Strategy for Commissioning:
l
HW Commissioning
l
Machine Checkout
l
Beam Commissioning
l
Stage A
l
Stage B
l
Stage C&D
7.
Documentation & Human Resources
8.
Conclusions
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
l Hardware Commissioning Coordination
l
http://hcc.web.cern.ch/hcc/ l Machine Checkout
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
Machine Coordinators Operators HWC T eam
…
Engineers In Charge (EIC) Commissioners In Charge (CIC)
Beam Commissioning
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
l
Hardware Commissioning
l
l
l
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
Time
Done in all sectors
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07
L H C A T L A S C M S L H C b A L I C E
The Beam Permit Loops in LHC
Signal Start: Clockwise Signal Stop: Anti-Clockwise Signal Stop: Clockwise Signal Start: Anti-Clockwise Area 6: Beam Dump Facility Area 5: CMS Experiment Area 4: RF Facility Area 3: Beam Cleaning Area 7: Beam Cleaning Area 2: ALICE Experiment Area 8: LHC-B Experiment Area 1: ATLAS ExperimentBIC
CMS
ATLAS
LHCb ALICE
10MHz Square wave generated at IP6
Controller When any of the four 10MHz signals are absent at IP6 4 fibre-optic channels from IP6 1 clockwise & 1 anticlockwise for each Beam 16 BICs per beam
wo at each Insertion Point Up to 20 User Systems/BIC B1 / B2 are Independent!
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
l
l
l
l
l
l
l
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
l Objectives:
l
Commissioning of BI (BWS,
BSRT, BCT, BGI, Q, Q’, BLM, BPM)
l
Improving lifetime
l
First optics checks
l
First commissioning of the Dump System
30mm Carbon wire LHC Wire Scanners
Beam Dump Block Septum magnet deflecting the extracted beam 15 kicker magnets H-V kicker for painting the beam
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
l
Safe machine operation with up to 1.4ּ1013 p+ at 450 GeV
l
Multi-bunch injection commissioned up to 16 x 9ּ1010 p+ and well tuned, including cleaning and protection
l
l
l
l
l
Beam instrumentation operational with up to 156
______ _________ ______
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
l
l
l
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
l
l
l
l
l
D2 Q5(B1) Q5(B2) Q4(B1) Q5(B2) 2ppm
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
L H C A T L A S C M S L H C b A L I C E
Fast recovery (SNAP-BACK) when the current is varied again. The source of this effect is mainly the Eddy currents flowing in the superconducting cables.
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
l
l
l
l
l
l
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
l
Get beams into collisions at top energy
l
Optimize integrated luminosity with relative luminosity as the main performance parameter
l
Keep background low and stable without spikes
l
Provide a rough knowledge of the absolute luminosity from beam parameters (beam intensities and sizes)
l
Commission the squeeze without crossing in IP1 and IP5 at 7 T eV; goal for this phase is *=2m
l
Squeeze of IP8 for LHCb operation with reduced beam intensities (*=2m)
l
Setup of the required protection, in particular, commissioning of the tertiary collimators, i.e., collimators to protect the experiments
RB RQD/RQF SQUEEZE ARC+ML6+LR5 (156 PCs) @ 5 T eV
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07
L H C A T L A S C M S L H C b A L I C E 1 10 100 1000 10000 1 10 T [K] P [kPa] SOLID
HeII HeI CRITICAL POINT GAS
λ line
Saturated He II Pressurized He II
1 10 100 1000 10000 1 10 T [K] P [kPa] SOLID HeII HeI CRITICAL POINT GAS
λ line
Saturated He II Pressurized He II
l
From 4.5K to 1.9K: Cold compressors (15 mbar) More than 15 tons of helium inventory [One week]
l
Tuning before powering: Instrumentation, Electrical feed-boxes (DFB’s), global process [One week]
l
From RT to 80K: Precooling with LN2 1200 tons of LN2 (64 trucks of 20 tons) [Three weeks]
l
From 80K to 4.5K: Cooldown with He turbines 4700 tons of material to be cooled [Two weeks]
OP/LHC) WAO'07
L H C A T L A S C M S L H C b A L I C E
~ 9000 magnets powered with ~1700 power converters
OP/LHC) WAO'07
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
~ 3 km ~ 70 m
ALICE
FBCT
Objectives:
l
Commissioning of the last 100 m
injection
l
First commissioning of key beam instrumentation: BPM, BLM, BTV and FBCT
l
Commissioning of the trajectory acquisition and correction
l
Threading the beam around the two rings (first turn)
l
Closing the orbit to be ready for phase A.2 (establishing circulating beam)
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
L H C A T L A S C M S L H C b A L I C E
OP/LHC) WAO'07 LHCb CMS ATLAS ALICE LHC
l
Get beams into collisions at top energy
l
Optimize integrated luminosity with relative luminosity as the main performance parameter
l
Keep background low and stable without spikes
l
Provide a rough knowledge of the absolute luminosity from beam parameters (beam intensities and sizes)
l
Commission the squeeze without crossing in IP1 and IP5 at 7 T eV; goal for this phase is *=2m
l
Squeeze of IP8 for LHCb operation with reduced beam intensities (*=2m)
l
Setup of the required protection, in particular, commissioning of the tertiary collimators, i.e., collimators to protect the experiments
RB RQD/RQF SQUEEZE ARC+ML6+LR5 (156 PCs) @ 5 T eV
L H C A T L A S C M S L H C b A L I C E