A few selected high-lights since the last Collaborationmeeting at Stockholm

(They are taken from the very recent yearly ATLAS presentation to the open session of the LHCC)

The main messages delivered there were (copied from the conclusions):

Many important milestones have been passed in the construction, pre-assembly, integration and installation of the ATLAS detector components

The most critical construction issue is the delay in the ECT integration, which has an impact on the overall installation completion (other issues remain the schedules for the ID and Muon end-cap chamber installations, and the calorimeter power supplies)

Very major software, computing and physics preparation activities are underway as well, using the Worldwide LHC Computing Grid (WLCG) for distributed computing resources

Commissioning and planning for the early physics phases have started strongly

ATLAS is highly motivated, and on track, for first collisions in 2007 and finally LHC physics in 2008

Response from the LHCC: By large very positive, transmit congratulations to thewhole Collaboration!

July – August 2006:

The solenoid has been fully commissioned in-situ up to 8.0 kA

The operation current is 7.73 kA for a field of 2.0 T

Successful accurate fieldmapping

1st August 2006: the solenoid is fully operational

Solenoid

Excitation to full field: 8 kA (1 August)

Wait for closingTile End-Caps

• Ramp in steps: 7730 A = 2 T

• repositioning accuracy ±0.1 mm• final position 0.0 ± 1.4 mm (relative IP)

7730 A2.00 T

7980 A

slow dump

voltage(blue)

current(red)

Coil length shrinkage, linear to I2

Field Mapping

• 3D calibrated Hall probes– Accuracy: ±1x10-4 T (at ≤1.2T)

(Felix Bergsma, CERN)• Excitation reproducibility

– Field: < 0.1x10-4 T– Current: < 5 ppm

• No hysteresis effect from iron – iron contribution to field: ~ 3.5 %

• Data confirms coil positionfrom survey and monitor system:– horizontal offset: 0.1 mm – vertical offset: -2.3 mm

Field measurement team

Comparison Calculated / Measured Field

Very accurate: Possible to identify details

in winding structure

After first corrections (@ 5kA):• +7x10-4 ~ -13x10-4 Timprovements in progress

Detailed talk Thursday 10h30by Heidi Sandaker

small radius[courtesy

H.Sandaker]

Fit using simple helical conductor model (large radius) [courtesy S.Snow]

Higher winding density

Conductor joint missing one-turn to be studied

Barrel Toroid test in 3 phases step-by-step cleaning of cavern from iron & safety access control

Phase 1 (27 Sep - 8Oct) : <300A static, ~10mT on vessel surface– Removal of green platforms and other large loose objects– Test of toroid inductance, resistances, RRR, fine tuning of coil cooling,

sensors, identification of quench heaters etc.

Phase 2 (9-20 Oct): 1-5 kA, static and 10mT/s field rate during quench

– Removal of all iron platforms and scaffolding within BT area

– Magnet Safety System test, power supply adjustments, slow and fast dumps, quench heater tests, check of coil mechanics

Phase 3: 5-20 kA (20 Oct- Dec), static and up to 50mT/s field rate

– Mandatory removal of all old and loose iron from the cavern including HS&HO areas and strict access control for new iron including tools!

– Step by step increase up to 20kA, slow and fast dumps at 5-10-15-18-20kA and check of coil mechanics, cooling, hot spot temperatures

End Cap Toroids integration in full swing

AFT redesign and repair in Sep-Oct 06

• ECT cold mass is pulled into the BT with ~260 tons taken by 16 tie rods that transfer load to the vessel and then to the 8 BT vessels trough the 8 AFT connection points

• Design assumed infinite stiffness of vessel during integration and 0.5mm tolerances

• Impossible to do, they may brake!• Redesign to make them adjustable after

closing, transport, cooling down in cavern• Bring the AFT connections through the end

plate to the outside, 16 new feed-throughs • Connect extension rod

New vacuum seal

Nut for adjustment• Problem solved,

but it takes time….

ScheduleECT-A• Closing vessel Oct-Dec 06• Vacuum test during X-mass• Preparations for transport Jan 07• Transport to 80K test station ~1 Feb• Transport to point 1 in March• Connections and test in cavern Mar-Jun 07

ECT-C• Cold mass ready by Dec 06 in B191; cryostating can not start before

ECT-A is out of B191• Cryostat integration Feb-Apr 07• Vacuum test and preparations for transport May 07• 80K test in May-June• Transport to point 1 by end of June• Connections and test in cavern by Jul-Sep 07 !

Inner Detector: highlights and concerns

• ID Barrel installed in pit and connect/commission just started, its weight measured and agrees fairly well with simulation.

• B-field measured and fast feedback on optimal detector position

• Satisfactory tests on evaporative cooling final system done• Steady progress on EndCap integration• Impressive progress on Pixel integration.

• Concerns in Jul06. and now:– TRT

• – SCT

• – Pixel

• Low mass (type0) Al cable cracks

– IDGEN • Service installation

– TRT •

– SCT •

– Pixel • Optoboards failures

– IDGEN • Service installation

TRT+SCT barrel travelled to the pit, 24th Aug 2006

Through the parking areaA tight fit between BT and EC Calorimeter

From the trolley to the support rails Inside cryostat

Now: cabling up (rest of the year!)

• ECC insertion started Friday last, went all way through but at the last cm there was a short. A G10 insulation layer is being added, expect insertion completed today.

ECA

• TRT: Hydraulic tests done and ok. HV lines tested (13 need to be replaced). Electronics tests started a week ago. Planned to be ready for SCT integration by late October.

• SCT: many small mods needed (tight tolerances), e.g. relay fibers to maximize length outside. Date for integration with TRT delayed to Nov 13 no time for combined cosmics test. Effort must be done to at least dig out a time slot for combined noise measurements.

Install end of january 2007…

Pixel Layer-2 – half shell

Pixel Layer2, once clamped, inside

Lot of progress on thePixels!

Pixel ECs at CERN

New manpower (also NIKHEF)Latest worry: optoboards (vcsels!)

LAr Summary

• Cryostats:– Barrel: Refilling with LAr did not solve all HV problems– End-cap A: Preparing for cool-down in Nov-06– End-cap C: Cool-down to follow after ECA is cold.

• Electronics board production nearing completion for both FE and BE

• LV PS:– A technical team is being set up to evaluate whether recent failures are

due to a design problem or due to weak Q/A. – Rate of ‘good’ modules is still low due to bad workmanship.

• HV PS:– The technical solution reported in July seems to be stable– Have seen Q/A problems in recent delivery.

LAr Barrel Steady State

expansion vessel pressure

1,2

1,22

1,24

1,26

1,28

1,3

8.6.06 0:00 10.6.060:00

12.6.060:00

14.6.060:00

16.6.060:00

18.6.060:00

20.6.060:00

22.6.060:00

date

arg

on

pre

ssu

re (

bar

a)

Stable pressure situation in expansion vessel

• Stable situation detector temperaturesTmin = 88.2 K

Tmax = 88.6 K

• Detector sub-cooled between 5.8 K and 8.6 K

(below vapor pressure curve).

Stable in time

Impurity level

Measured with four purity cells:

(0.20 +- 0.05) ppm O2

LAr Barrel HV Status

• HV status at an early stage of commissioning:– 1600 V on Calorimeter, 2000 V on Presampler, leaving out

known problematic channels.– Status on Calor: 2 sectors HV shorts, 10 sectors working with

half of the signal, out of 448 independent sectors– Status on presampler: 7 (/256) problems, will try to burn them.– Problematic channels will be dealt with separately.

• Decided on HV strategy for next few months:– Leave HV on EMB calorimeter off when not needed, – Put 1600 V on 6 – 8 modules needed for cosmics data taking

with tilecal.

There are problems with power supplies (LV and HV, both LAr and tiles)

- quality

- quantity (ATLAS,CMS,ALICE,LHCb orders at CAEN > CAEN capacity)

But I don’t know details, nor how serious this is…

Correlation betweenLAr Middle & Front layer

Event display from the first LAr + Tile Calorimeter barrel cosmics run

Barrel Chamber Installation

• 514 barrel MUON Stations have been installed on rails (~74%), not all of them in final position

Muon Installation Status ( 1-10-2006)

USA

8

US

7

6

5

43

2

10

11

1

16

1514

13

12

9

Blue: completed

Green: completed on one side

Red partly installed

Service installation status: MDT

• MDT HV-LV cables installed for all outer chambers

– Production and installation under way

• MDT Alignment cables Installed for most of the chambers

• MDT DCS daisy chains cable produced for most of the

chambers and installed on upper sectors (1,2,3,4,5,6,7,8,13)

• MDT RO/TTC fibers: Installed on most of the upper sectors

and partially connected to chambers (mainly BOS)

• Gas connections Chambers to Manifold started in many

sectors (BOL, BOS, BIL, BIS)

MDT DCS and Alignment• All DCS computers Installed in

USA15– CANbus Power crates installed

– Read-out of DCS chains in more than 115 chambers on the upper sectors is performed with final system. (R. Hart)

• All Alignment Computer Installed in USA15– Many sectors cabled and tested

with final system– First 4 projective alignment lines

read-out in sector 13 – Reference System will be used

for monitoring the BT deformations during the magnet excitation.

Alignment PCs

DCS PCs and Power crates

Combined MDT+RPC+Tile run

ATLANTIS display of an event from the combined MDT+RPC+Tile run taken middle of august. Run #1002 , event # 50The µ-segment in the Muon System was reconstructed with Moore

Collaboration of Tile and MS communityE. Feng, S. Rosati, S. Veneziano :

A tool for RPC commissioning M. BigliettiM Della PietraF. ConventiD. Della Volpe

MDT Theta (rad)

RP

C T

het

a (r

ad)

= 0.74 cm

≈ pitch/√12

Results of the tracking:

RPC vs MDT correlation

Good tracking resolution on all planes

Good correlation between the angle in the r-z view reconstructed by Athena with MDT and by this code for RPC

One more view of the first installed TGC Big Wheel

Simulation of a mini black hole event with MBH ~ 8 TeV in ATLAS

ATLAS was honoured last week by a visit of Stephen Hawking

Installation schedule version 8.1 (draft)

36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52

JN ID

AID

CID

C

36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52

Cold tests

BW-A(TGC3)

Beam tuning @ 450 GeV + collisions

UX

15 &

LH

C c

losi

ng

Feb '07

services

IDC connection and testing

Barrel Muon A

JT

BW-A (tooling +TGC1)

ID barrel connection and testing

LAr A cool down

IDA connection and testing

open

ing

Oct '07 Nov '07Sep '07

BW-A (MDT)

Apr '07 Jun '07Mar '07 Jul '07 Aug '07May '07

ECT- C cooldown &

test

May '07

VJ

Cold tests

JT VT

Small Wheel C

Endcap Toroid C

ECT on half truck

Endcap Toroid A

Feb '07Sep '06 Oct '06 Jan '07Nov '06 Dec '06

Side A

Barrel

Side C

Side A

Barrel

Side C

Glo

bal C

omm

issi

onin

g

glob

al te

sts,

pum

p do

wn

& b

ake

out

JF EO, side A

Global Commissioning

JF

Big Wheels in park position

VJ

EO, side C

Access restrictions once toroid in place

JF

Pixe

l

open

ing

Limited access

VA

Small Wheel A

Sep '06

VT

JF

Jan '07Dec '06Nov '06

BW-A(TGC2)

Oct '06

Tru

ck

LAr C cool downservices installation

open

ing

Big Wheel (TGC1)

Big Wheel (MDT)BIG WHEEL

(TGC2)

Sep '07 Nov '07Mar '07 Oct '07Apr '07

Dec '07

Jun '07 Aug '07Jul '07

Pixel connection and testing

Access from sector 13

VA

Big Wheel (TGC3) Muon

Barrel C

Dec '07

BT test Full Magnet test

The 1000th cryomagnet wasinstalled in the tunnel on 5th September (out of 1746 total)

The Dash Board for the dipoles(1232 total in LHC) on 31st August

Photo 0903

Tunnel installation

• All main RF equipment now installed in the tunnel at point 4 having been fully tested and vacuum conditioned on the surface

- 400 MHz accelerating cavities - 16 cavities in 4 modules, 2 per beam.

- Transverse damping kickers - 16 electrostatic deflectors, 8 per beam - Longitudinal monitors – 6 wideband coaxial line monitors

• Alignment is in progress, beam tube vacuum connections in one month.

• Cryogenic, cable and waveguide connections still to come.

• Power amplifiers for dampers (installed under kickers) for early 2007.

On target for 450 GeV run

Acceleration RF Cavities

LHC Commissioning SequenceMachine is closed (Aug 07)

Hardware commissioning needed for 450GeV plus maximum possible for 7TeV

Nov/Dec 2007: Beam operation with collisions at 450 GeV

Shutdown: Finish hardware commissioning and installation of some delayed

equipment for 7 TeV (e.g. some collimators).

LHC commissioning for 7 TeV physics.

LHC Operation

Summary of LHC Hardware Commissioning Goals

• During 2007: fully commission 4 sectors and partially commission other 4– Hand over machine to operations 1st Nov.2007

• During 2008: (re)commission all sectors to 100% in the first 3 months.– Hand over machine to operations on 1st April 2008

Time (from Nov 1 2007?)

PhaseBeam time

[days]

1 First turn 4

2 Establish circulating beam 3

3 450 GeV – initial 3

4a 450 GeV - consolidation 1-2

4b 450 GeV – system commissioning 2-3

5a 2 beam operations 1

5b Collisions 1-2

16 days

Given an operational efficiency of 60%, this gives an elapsed time of about 26 days.

31 Days!!

• LHC is approaching completion.

• LHC commissioning is prepared (in detail.)

• 450 GeV collisions run in 2007.

• LHC collisions at 7 TeV in 2008 (possible

luminosities, around 1033 cm-2 s-1).

– Finalised plan after the 450 GeV run

• More physics

LHC Schedule

• A CRAG (Commissioning and Running Advisory Group) meeting was convened on 1st September, with participation of all its members (J Engelen, L Evans, S Myers, M Della Negra, T Nakada, J Schukraft, Peter Jenni, M Ferro-Luzzi, and M Mangano)

• L Evans confirmed the June LHC installation schedule, being very confident that the recent months have shown that the milestones will be reached

• S Myers was cautious, but commented that it is realistic to plan for a couple of weeks of 900 GeV collisions in 2007

• The plan is to have the machine on open access January-March 2008, and have then the experiments closed again on 1st April 2008, followed by a few (~3) weeks of controlled access

• The working schedule has then as target date for first 14 TeV collisions the last week of June 2008 (obviously not a hard date)

• The experiments were asked to present at the next CRAG (no date yet, maybe early October) their wishes for the 2007 run

Note: S Myers has accepted to give a presentation on Friday morning