status of the lhc project l.evans - c.wyss riunione csn1 infn napoli, 21 settembre 2005

Status of the LHC ProjectL.Evans - C.WyssRiunione CSN1 INFNNapoli, 21 Settembre 2005

CERN L.Evans & C.Wyss INFN CSN1 Napoli September 20052

L.R. Evans – EDMS Document No. 521217

SPC

3

• length of newly tested part ~ 2.5 km

• over 400 magnets

beam tests23./24.10.04

6./7.11.04

TI 2

TI 8

TI 2 upstream part commissioning (w/o beam) possible as of Q2/2005

beam tests 8.9.03

SPSLHC

AB/BT equipment in PS complex

MQI chamber

13:39 beam at the end of TI 8, some 2.5 km away, at first attempt

General situation

TI 8 commissioning / V.Mertens / TCC, 29.10.2004


Beam parameters obtained from the central frequency measurements, averaged over the data obtained from the

horizontal and vertical planes.


Results of TI8 test


End of civil engineering works in Point 5 (1st February 2005)


Superconducting cable 1


Superconducting cable 2


Dipole cold masses


Number of quenches to reach 8,33 Tat the first cooldown (560 dipoles)

0102030405060708090

100110120130140150160170180190200210220230

Number of quenches to reach 8.33T

Nu

mb

er o

f c

ryo

-d

ipo

les 01 02 03


LHC Dipoles: integrated field

10.07

10.09

10.11

10.13

10.15

0 100 200 300 400 500 600 700

Magnet progressive number

Int tr

ansf

func

(Tm

/kA

)

-40

-20

0

20

40

Units

Firm 1

Firm 2

Firm 3

AT-MAS

Cold mass

upper limit for single magnet (3 sigma)

lower limit for single magnet (3 sigma)


Dipole field quality: average b3

-10

-5

0

5

10

0 100 200 300 400 500 600 700

Magnet progressive number

b3

inte

gra

l (u

nits

)

Firm 1

Firm 2

Firm 3

Cold mass

upper limit for systematic

lower limit for systematic

AT-MAS & MTM

Cross-section 2 Cross-section 3


Arc quadrupole cold masses


MSCB sextupole dipole correctors


Cryodipole overview


SSS overview


Magnet Installation

• Installation is progressing in sectors 8-1 and 4-5. More than 100 superconducting magnets have been installed. The installation rate must now ramp up to 20 magnets per week (16 dipoles and 4 SSSs) in the next few weeks.

• At the end of October, sector 7-8 will be liberated for magnetic installation. From then on there will be no shortage of slots.


First cryodipole lowered on 7 March 2005


First SSS lowered on 19 April 2005


Transport in the tunnel with an optical guided

vehicle


Transfer on jacks


Preparation of interconnect


Interconnection of beam tubes


Interconnect in sector 8-1: in progress in sub-sectors C and F


Pre-assembly of first low-beta triplet

(hall 181)


UA47: Quench protection & Power converters


Cryogenics overview


2400 W @ 1,8 K in the UX85 cavern

1.8K refrigeration units1st Pump-down in final LHC configuration

0.00

0.05

0.10

0.15

0.20

0.25

0.30

0.35

0.40

0.45

0.50

7:12 8:24 9:36 10:48 12:00

Time

Su

cti

on

Pre

ss

ure

[B

]

0

500

1000

1500

2000

2500

Co

oli

ng

Po

we

r [

W]

Suction Pressure

Set point

1.8K Cooling Power

P8 - 7 April 2005

Installed mode 2400 W @ 1.8 K

Pump-down 15 mbar


Repair of QRL modules


Repair of special QRL elements at

CERN


Cryogenic distribution line


QRL


Reinstallation of QRL in 7-8

• Sub-sectors A and B (600 m) have been cooled down on Wednesday 14th September.

• After the cold tests, the inner triplet will be installed, cooled down and powered whilst the rest of the line is being installed.

First cooldown of 600 m cryogenic LHC line sector 13-14 September 2005

He in

He outTh.screenlineLHe

linePump. line

20 K line


Conclusions

• Main objectives:– terminate installation in February 2007– first collisions in summer 2007

• The industrial production of standard components is compatible with this objective.

• The ramping up of QRL activities and magnet installation is critical to maintain this schedule.

• Additional actions have been implemented to ensure proper QRL production and installation rates.

• The installation and interconnection of cryomagnets have started in the tunnel.

• The commissioning of technical systems will take place in two adjacent sectors in parallel.

• Main next actions:– partial test of sector 7-8 in autumn 2005– commissioning test of the two first sectors (7-8 and 8-1) in summer

2006– find external collaborators to help with commissioning.

=> many thanks to INFN for its support !

status of the lhc project l.evans - c.wyss riunione csn1 infn napoli, 21 settembre 2005

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