Latest News

• SPSC approved two separate running periods for CNGS: one just after the commissioning (few 1018 p.o.t.) and one at the end of the run (1019 p.o.t.).

• To be confirmed at the Research Board

2006 PS&SPS days(18-19/01/06)

The Workshop focussed on the start-up of the PS & SPS complex in 2006 after the long shut-down in 2005

Session 1: What has been done

Session 2: Re-commissioning and Testing the Equipment

Session 3: Start-up with Beam (from the CCC)

Summary and Action Plan

Major issues• PS Main Power Supply

– Spare rotor installed (after 2004 “near failure”) – No spare until July ’06 – even then it will take 1 - 2 months to repair

• Many changes have been made in the PS that can affect the start-up Looks like a re-commissioning:– Clear procedures for checking all MM circuits (in particular PFW)

R.S. with AT/MEL– Cunning plan for the commissioning with beam with identified

milestones and steps (analysis of the alignment and optics issues) R.S. in collaboration with ABP and equipment groups. We must prepare procedures and tools for orbit analysis and realignment and for finding possible errors in the MM circuits

• Tight constraints on the magnet re-alignment in case of need. – Review of the alignment procedures and vacuum system

tolerances AT/VAC

Major issues• SPS Controls and application SW big bang

• Diluters (TPSG’s) for SPS septa– Cannot withstand a direct hit from a full LHC beam, but septa are protected– Just at the limit for nominal CNGS beam– Be careful about using TT40 for target practice

• SPS impedance– Impedance reduction of the Kickers to be extended to other SPS kickers as

soon as method demonstrated efficient conceive measurements to determine effectiveness

– Launch SPS transverse impedance review aiming at identifying and eliminating major sources

• Access to CCC, new cards – EDH authorization– Clarification of CCC access conditions (within/out working hours)– Need to apply for CCC priv. Authorization

Chamonix XIV

• The minimum workable LHC– 3 sessions on plans and requirements for beam

commissioning, machine protection and collimation, providers’ commitments

• Magnetic requirements for commissioning• Experiment-machine interface• Installation• I-LHC• Sector test

– 2 sessions: HW preparation and beam tests

R.Bailey, Chamonix XV, January 2006R.Bailey, Chamonix XV, January 2006

Staged commissioning plan for protonsStaged commissioning plan for protons

Hardware commissioning

Machine checkout

Beam commissioning

43 bunch operation

?75ns ops

25ns ops I

Install Phase II and MKB

25ns ops II

Stage I II III

No beam Beam

IV

I.I. Pilot physics runPilot physics run First collisionsFirst collisions 43 bunches, no crossing angle, no squeeze, moderate intensities43 bunches, no crossing angle, no squeeze, moderate intensities Push performance (156 bunches, partial squeeze in 1 and 5, push intensity)Push performance (156 bunches, partial squeeze in 1 and 5, push intensity)

II.II. 75ns operation75ns operation Establish multi-bunch operation, moderate intensitiesEstablish multi-bunch operation, moderate intensities Relaxed machine parameters (squeeze and crossing angle)Relaxed machine parameters (squeeze and crossing angle) Push squeeze and crossing angle Push squeeze and crossing angle

III.III. 25ns operation I25ns operation I Nominal crossing angleNominal crossing angle Push squeezePush squeeze Increase intensity to 50% nominalIncrease intensity to 50% nominal

IV.IV. 25ns operation II25ns operation II Push towards nominal performancePush towards nominal performance

Beam

R.Bailey, Chamonix XV, January 2006R.Bailey, Chamonix XV, January 2006

IonsIons

Experiment sideExperiment side ALICE, ATLAS and CMS will all take Pb-Pb dataALICE, ATLAS and CMS will all take Pb-Pb data Detectors and machine will be already commissioned with ppDetectors and machine will be already commissioned with pp ALICE requests ALICE requests

4 week ion runs at the end of each year4 week ion runs at the end of each year first short run as early as possiblefirst short run as early as possible

Machine sideMachine side Start with early ion scheme (62 bunches instead of 592, 7 10Start with early ion scheme (62 bunches instead of 592, 7 1077 ions per bunch) ions per bunch) Will have to Will have to

Set up RF capture Set up RF capture Commission essential instrumentationCommission essential instrumentation Commission squeeze in IR2Commission squeeze in IR2 Establish collisionsEstablish collisions

Could do (some of) this early on if injectors are ready (same optics as for p). Injection Could do (some of) this early on if injectors are ready (same optics as for p). Injection optics.optics.

Ion runs could provide cool down of PS SPS LHC after proton operationIon runs could provide cool down of PS SPS LHC after proton operation After early ion scheme run, increase number of bunchesAfter early ion scheme run, increase number of bunches Move to nominal when possible Move to nominal when possible

Estimate ≥ 1 week for first setup

Followed by physics run

- From Chamonix XIV -

The minimum workable LHC

• Pilot at 7 TeV might be close to the damage limit in particular if smaller than nominal emittance. The injectors will have to provide a pilot with nominal (and certified?) emittance

• Bake-out of some of the LSS (IR3/7) only in 2007-2008 (could be an issue for a pilot ion run @ 10-7 mbar)

• Machine protection with ions: – General awareness that this needs to be addressed (thanks to

John). – Lead ion collimation: need to go further in the studies for the

nominal beam:• collimation efficiency, loss patterns for the different optics

(injection – squeezed)• Effect of errors (orbit, beta-beating, etc…)• possible solutions

The minimum workable LHC

ATBDelays in the production of the collimators some components have a delay of 6 month (after 6 months form the contract signature…..) Need second installation campaign after standard, some elements delayed to SD 2007-8BDINo intensity reading from BPM for the start-up? very important tool for Day 1 debugging (aperture issues, etc.)Loss maps for ions required to determine position of additional BLMs Wire Scanners: in 2007 LEP electronics??, in 2008 new electronics? Issue of the quenches induced by a wire scan. What about ions?COas usual missing man-power. Issue of the security of the access.No application SW responsible for a lot of the instruments (in particular beam profile monitors, tune measurement, luminosity monitors)

Experiment Machine Interface

• Main goal is optimizing luminosity for ATLAS and CMS (asking for 10 fb-1 /experiment for discovering the Higgs) . Deviations from main streamline have to be justified

• CRAG: Comissioning and Running Advisory Group set-up to define the guidelines + Physics coordinator nominated (Massimiliano Ferro-Luzzi)

• Issue of 25 vs. 75 ns running the experiment too might want to run at 75 ns to test their capability of handling many events/crossing.

• Luminosity measurements– what about ions? Is CdTe OK for monitoring luminosity during ion

operation? – Compatibility of ALICE ZDC with luminosity monitor (luminosity monitor

in front of the ZDC). • Proton run for ALICE * < 35 m because of the limitations in the

strength for separation bump magnets

Interaction with the LHC Interaction with the LHC machine during operation (2)machine during operation (2)

The technology has been chosen recently

ZN only used in HI runs ~10-20 % I just in front of

ZN does not spoil the energy measurement. The effect on the measurement of the impact position of the particles is presently under study

The compatibility with the ZN depends on the amount of converter necessary for the luminosity monitor. If NOT compatible:

– Place converter on movable support

– Use ZN to monitor luminosity (and to bring beams into collision)

D2

TCTH

ZNZP

Luminosity Monitor

Luminosity monitorLuminosity monitor

IP2

Chamonix XV January 2006 S.Weisz

LHC Installation

Conclusions:

• Status of installation versus planning:

– We are not on time, actual delays spans from 3 to 4 months– We are worried by the late procurement of DFB’s, Special SSS’s, and

SSS’s with plugs, where peak delays of 5 months with respect to planning occurred

– Cryo-magnet transport approaching nominal rates, SSS installation through Point 6 should allow to catch-up the SSS backlog

– Leak test and leak finding require more time than expected

• Hardware commissioning:– Sector 7-8 should be ready for hardware commissioning by August

2006– The hardware commissioning of Sector 8-1 will not be finished this

year need to find solutions for sector test– Last Sectors (1-2 & 2-3) should be ready for HW commissioning by

August 2007

Installation and others…

• 2006 marked by many incidents particularly at the end of the year• SPS Access System: (temporary) modifications to comply with INB

requirements and get the permission to run in 2006. If you see that:

• Open only in case of danger

ATTENTION:L‘ouverture provoque l'arret

d'urgence general

Contactez la Salle de Controle: Tel 77500

PL, EMP Chamonix XV, 23.01.2006 EDMS: 698337

SPS Access Project

Compensatory measures: Run 2006

• Access doors:– Caps on the doors locks, but only in entry direction– Emergency exits non affected

• Sector doors in the transfer lines used as emergency exits will be connected directly to neighboring AUG chains:– PPG66003 in TT6 in to extraction zone towards TI2– PPG4004 in TT40 in the extraction zone towards TI8 and CNGS– PPG21161 in the interface zone between TT20 and target region

TCC2.– PPG100611 in TT10 in the transfer tunnel between PS and SPSOPENING THE DOOR WILL TRIGGER AN EMERGENCY STOP OF SPS!

PL, EMP Chamonix XV, 23.01.2006 EDMS: 698337

SPS Access Project

SPS Upgrade Project: phases and milestones

t

Système d’accès SPS

actuel

Système d’accès SPS

actuel

NouveauSystème

d’accès SPS

Mesures compensatoires

Ru

n

’06

SP

S

Ru

n ‘

07

S

PS

+L

HC

Ru

n ‘

’08

S

PS

+L

HC

Introduction d’une voie

câbléeredondante

*Date suivant le schedule des accelerateurs

Voie câbléeredondante

Shutdow

n

Shutdow

n

I-LHC

• Present schedule for the ion beam confirmed:– LEIR commissioning completion in April 2006– PS commissioning – fall 2006– SPS commissioning in 2007 (beginning or summer according to the fate

of the Sector Test, if any)– LHC ion run in 2008. Would allow to cool down the machine after proton

run.– Nominal beam starting in 2007 in LEIR

• Ion source: some critical components have no spare (14 GHz generator possibility buy 18 GHz generator and klystron)

• Controls: still some work to be done– New FESA version in February ?– SW tests planned before start-up?

Objectives 2006

Controls with Java1. Cycle editor (LSA) Optimization

2. Archives Ready

3. Alarms Full functionalities

4. PPM Copy For GM and FESA

5. Passerelle For GM and FESA

6. OASIS Improve speed connection

6. EQP Survey Ready

7. Cycle editor (LSA) GUI improvement

I-LHC

• LEIR commissioning (open issues):– Injection line (initial conditions and optics) need to provide

understood optics for Pb to OP– Lifetime with O4+: obstacle in BIPM?, e-cooling?, vacuum?,

charge exchange cross-section not as low as initially thought (any data from other labs? GSI?), instabilities from ion trapping in the e-cooler

– Optics measurements during the ramp: analyzed?– E-cooling need to be clearly demonstrated (BIPM and Schottky

are vital)– Transverse feedback commissioning need to be completed

• Collaboration and Implication of the vacuum colleagues desirable to attack the issues related to vacuum

Sector Test

• General agreement that it would be very useful:– Milestone for several services, equipments, …– Full integration test: all systems working together– Verification of the QA (polarities, apertures, etc..)– Test for the commissioning strategy (type of meas.,

tools for beam meas., …– Public relation

• …provided no “bricolage”/short-cut is taken to get there

Sector Test• Main concern: delivery of the feedboxes – transition normal

temperature – cryogenic environment for the current leads (HTS)• If no delay reduction drastic reduction of the HW commissioning

time mission impossible• What are the risk resulting from the reduced HW commissioning

time?• Is the validity of the test being compromised?• What about delaying the Sector test (and the commissioning) by the

present installation delay (4-5 months)?• Possible implication for the Ion commissioning in the SPS (Spring

Autumn 07?)• Revived the idea of testing some of the most critical magnets in the

SPS extraction line (Q6). Feasible? When?