Status of the LHC Project
L.Evans - C.Wyss
Riunione CSN1 INFN
Napoli, 21 Settembre 2005
AB/BT equipmentGeneral
in PS complex
situation
SPC
13:39  beam at the end of TI 8, some 2.5 km away, at first attempt
• length of newly tested part ~ 2.5 km
beam tests
23./24.10.04
6./7.11.04
• over 400 magnets
MQI
chamber
beam tests
8.9.03
TI 8
LHC
SPS
TI 2
TI 2 upstream part commissioning (w/o
beam) possible as of Q2/2005
TI 8 commissioning / V.Mertens / TCC, 29.10.2004
L.R. Evans – EDMS Document No. 521217
CERN L.Evans & C.Wyss
INFN CSN1 Napoli September 2005
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2
Beam parameters obtained from the central frequency
measurements, averaged over the data obtained from the
horizontal and vertical planes.
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Results of TI8 test
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End of civil engineering works
in Point 5 (1st February 2005)
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Superconducting cable 1
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Superconducting cable 2
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Dipole cold masses
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INFN CSN1 Napoli September 2005
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230
220
210
200
190
180
170
160
150
140
130
120
110
100
90
80
70
60
50
40
30
20
10
0
02
03
n
o
tr
ea
c
h
ed
7
6
5
4
3
2
1
01
0
Number of cryo-dipoles
Number of quenches to reach 8,33 T
at the first cooldown (560 dipoles)
Num be r of que nche s to r e ach 8.33T
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LHC Dipoles: integrated field
Cold mass
Firm 1
Firm 2
Firm 3
40
upper limit for single magnet (3 sigma)
10.13
20
10.11
0
10.09
-20
Units
Int transf func (Tm/kA)
10.15
lower limit for single magnet (3 sigma)
10.07
-40
0
100
200
300
400
500
600
Magnet progressive number
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700
AT-MAS
10
Dipole field quality: average b3
b3 integral (units)
Cold mass
Firm 1
Firm 2
Firm 3
10
5
upper limit for systematic
0
lower limit for systematic
-5
Cross-section 2
-10
0
100
Cross-section 3
200
300
400
500
Magnet progressive number
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600
700
AT-MAS & MTM
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Arc quadrupole cold masses
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MSCB sextupole dipole correctors
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Cryodipole overview
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SSS overview
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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.
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First cryodipole lowered on 7 March 2005
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First SSS lowered on 19 April 2005
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Transport in the
tunnel with an
optical guided
vehicle
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Transfer on jacks
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Preparation of interconnect
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Interconnection of beam tubes
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Interconnect in sector 8-1: in progress in subsectors C and F
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Pre-assembly of first
low-beta triplet
(hall 181)
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UA47: Quench protection & Power converters
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Cryogenics overview
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2400 W @ 1,8 K in the UX85 cavern
1.8K refrigeration units
1st Pump-down in final LHC configuration
P8 - 7 April 2005
0.50
2500
0.40
Installed mode
2400 W @ 1.8 K
0.35
0.30
2000
1500
0.25
0.20
Suction Pressure
0.15
Set point
0.10
0.05
Pump-down
15 mbar
1.8K Cooling Power
0.00
7:12
1000
Cooling Power [W]
Suction Pressure [B]
0.45
500
0
8:24
9:36
10:48
12:00
Time
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Repair of QRL
modules
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Repair of special
QRL elements at
CERN
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Cryogenic distribution line
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QRL
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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.
CERN L.Evans & C.Wyss
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First cooldown of 600 m cryogenic LHC line sector
13-14 September 2005
LHe
line
Th.screen
line
He in
He out
Pump. 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 !
CERN L.Evans & C.Wyss
INFN CSN1 Napoli September 2005
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