Status of the LHC Project Lyndon Evans LHC Machine Advisory ...
Status of the LHC Project Lyndon Evans LHC Machine Advisory ...
Status of the LHC Project Lyndon Evans LHC Machine Advisory ...
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
<strong>Status</strong> <strong>of</strong> <strong>the</strong> <strong>LHC</strong> <strong>Project</strong><br />
<strong>Lyndon</strong> <strong>Evans</strong><br />
<strong>LHC</strong> <strong>Machine</strong> <strong>Advisory</strong> Committee<br />
7 December 2006
Dipole Cold Masses<br />
L.R. <strong>Evans</strong> – EDMS Document 805670 2
Cryodipole overview<br />
Total need<br />
L.R. <strong>Evans</strong> – EDMS Document 805670 3
SSS overview<br />
L.R. <strong>Evans</strong> – EDMS Document 805670 4
Progress Report: installation <strong>of</strong> <strong>the</strong> cryogenic line<br />
L.R. <strong>Evans</strong> – EDMS Document 805670 5
1.8 K refrigerators<br />
Point 8<br />
Storage<br />
Air Liquide<br />
QSCC QSCA QSCB<br />
QSRA QSRB<br />
QSCC<br />
Surface<br />
IHI Linde<br />
Shaft<br />
QURA<br />
QURC<br />
QUIC<br />
QURC<br />
Cavern<br />
Sector 7-8 Sector 8-1<br />
Tunnel<br />
L.R. <strong>Evans</strong> – EDMS Document 805670 6
The cryogenic infrastructure<br />
Point 8<br />
Storage<br />
QSCC QSCA QSCB<br />
QSRA QSRB<br />
QSCC<br />
Shaft<br />
Surface<br />
QURA<br />
QURC<br />
QUIC<br />
QURC<br />
Cavern<br />
Sector 7-8 Sector 8-1<br />
Tunnel<br />
L.R. <strong>Evans</strong> – EDMS Document 805670 7
QRL: installation and welds<br />
3.3 km <strong>of</strong> QRL per sector<br />
- 2100 internal welds made with automatic orbital welding machines<br />
- 700 external manual welds<br />
Special connections<br />
Internal compensators<br />
L.R. <strong>Evans</strong> – EDMS Document 805670 8
QRL: special regions<br />
TI2<br />
L.R. <strong>Evans</strong> – EDMS Document 805670 9
Progress Report: cryogenic plants<br />
L.R. <strong>Evans</strong> – EDMS Document 805670 10
DFB Electrical Feed Box<br />
Connection to<br />
magnets<br />
Vacuum equipment VAA<br />
Current lead chimneys<br />
x 16<br />
Shuffling module<br />
6kA leads<br />
13kA leads<br />
2 per <strong>LHC</strong> Point<br />
High current module 13kA & 6kA leads<br />
SHM/HCM<br />
interconnect<br />
Jumper cryo<br />
connection to QRL<br />
Supporting beam<br />
6kA leads<br />
Removable door<br />
600A leads<br />
HCM/LCM<br />
interconnect<br />
The DFB ensures <strong>the</strong> <strong>the</strong>rmal<br />
transition <strong>of</strong> <strong>the</strong> superconducting<br />
circuits<br />
DFBA<br />
DFBL<br />
DFBM<br />
DFBX<br />
45<br />
Low current module 6kA & 600A leads<br />
1.9K 4.5K<br />
L.R. <strong>Evans</strong> – EDMS Document 805670 11
DFBA installation<br />
DFBAO-HCM leaving assembly hall 183<br />
DFBAO-HCM lowered at Point 2<br />
L.R. <strong>Evans</strong> – EDMS Document 805670 12
DFB interconnection in <strong>the</strong> tunnel<br />
DFBAO in sector 7-8<br />
DFBMA in sector 7-8<br />
L.R. <strong>Evans</strong> – EDMS Document 805670 13
Progress Report: magnet installation<br />
L.R. <strong>Evans</strong> – EDMS Document 805670 14
Progress Report: magnet installation<br />
L.R. <strong>Evans</strong> – EDMS Document 805670 15
Dipole interconnection<br />
L.R. <strong>Evans</strong> – EDMS Document 805670 16
Progress Report: interconnections<br />
L.R. <strong>Evans</strong> – EDMS Document 805670 17
Interconnections<br />
L.R. <strong>Evans</strong> – EDMS Document 805670 18
Closure <strong>of</strong> sector 7-8 on November 10, 2006<br />
L.R. <strong>Evans</strong> – EDMS Document 805670 19
Interconnections: Electrical Quality Assurance<br />
L.R. <strong>Evans</strong> – EDMS Document 805670 20
Interconnections<br />
8-1<br />
02.05.2005<br />
10/ 01/ 2007<br />
7-8<br />
14.11.2005<br />
15/ 11/ 2006<br />
4-5<br />
28.08.2006<br />
20/ 02/ 2007<br />
3-4<br />
25.09.2006<br />
20/ 04/ 2007<br />
5-6<br />
02.11.2006<br />
31/ 05/ 2007<br />
2-3<br />
14.12.2006<br />
12/ 07/ 2007<br />
6-7<br />
17.02.2007<br />
14/ 07/ 2007<br />
1- 2<br />
01.04.2007<br />
19/ 08/ 2007<br />
01.2005 06.2005 12.2005 06.2006 12.2006 06.2007 12.2007<br />
Revised schedule Sept. 2006<br />
L.R. <strong>Evans</strong> – EDMS Document 805670 21
Pressure test <strong>of</strong> Sector 8-1<br />
• During <strong>the</strong> pressure test <strong>of</strong> Sector 8-1 (25 th<br />
November) <strong>the</strong> heat<br />
exchanger tube in <strong>the</strong> inner triplet failed at 9 bar differential pressure.<br />
• The inner triplet was isolated and <strong>the</strong> pressure test <strong>of</strong> <strong>the</strong> whole octant<br />
was successfully carried out to <strong>the</strong> maximum pressure <strong>of</strong> 27.5 bar.<br />
L.R. <strong>Evans</strong> – EDMS Document 805670 22
One <strong>of</strong> <strong>the</strong> triplets at Point 5<br />
L.R. <strong>Evans</strong> – EDMS Document 805670 23
Inner Triplet<br />
L.R. <strong>Evans</strong> – EDMS Document 805670 24
Inner Triplet<br />
L.R. <strong>Evans</strong> – EDMS Document 805670 25
Inner Triplet: heat exchanger<br />
L.R. <strong>Evans</strong> – EDMS Document 805670 26
Inner Triplet: heat exchanger<br />
L.R. <strong>Evans</strong> – EDMS Document 805670 27
Cooldown <strong>of</strong> Sector 7-8<br />
• The inner triplet has been isolated from <strong>the</strong> rest <strong>of</strong> <strong>the</strong> octant and<br />
flushing with helium gas has started in order to remove any debris. As<br />
soon as <strong>the</strong> filters are clean, cooldown can start.<br />
• A repair procedure for <strong>the</strong> inner triplet heat exchanger is being<br />
validated and will have to be implemented on all 24 quadrupoles.<br />
• The consequences on <strong>the</strong> 2007 schedule will be evaluated once this<br />
procedure is defined.<br />
L.R. <strong>Evans</strong> – EDMS Document 805670 28
The RF modules on <strong>the</strong> UX45 « tunnel » platform<br />
L.R. <strong>Evans</strong> – EDMS Document 805670 29
The junction <strong>of</strong> <strong>the</strong> injection line TI8 in UJ88<br />
L.R. <strong>Evans</strong> – EDMS Document 805670 30
The collimators: layout<br />
Phase 1<br />
Momentum<br />
Cleaning<br />
Betatron<br />
Cleaning<br />
L.R. <strong>Evans</strong> – EDMS Document 805670 Courtesy R.Assman 31
The collimators: non conformities<br />
TCS010 after bake-out (8 Sep 2006)<br />
1.00E-07<br />
9.00E-08<br />
leak<br />
8.00E-08<br />
Partial Pressure [uncalibrated]<br />
7.00E-08<br />
6.00E-08<br />
5.00E-08<br />
4.00E-08<br />
3.00E-08<br />
2.00E-08<br />
1.00E-08<br />
Brazings <strong>of</strong> <strong>the</strong> instrumentation<br />
feedthroughs<br />
0.00E+00<br />
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105<br />
Mass<br />
Contamination <strong>of</strong> parts exposed to <strong>the</strong> beam<br />
L.R. <strong>Evans</strong> – EDMS Document 805670 Courtesy R.Assman<br />
32
The collimators & <strong>the</strong> 450 GeV run<br />
Collimators are an intensity-driven system<br />
<strong>LHC</strong> can be started at low intensities without any collimators.<br />
However, once intensity or energy is increased a high number is<br />
quickly needed!<br />
Intensity<br />
Primary<br />
collimation<br />
(TCP) and<br />
scraper<br />
(TCHS)<br />
Secondary<br />
collimation<br />
(TCS)<br />
Absorbers<br />
for<br />
collimation<br />
debris<br />
(TCLA)<br />
IR (exp)<br />
collimators<br />
(TCT,<br />
TCLP,<br />
TCLI)<br />
Dump<br />
protection<br />
(TCDQ<br />
+TCS)<br />
Total<br />
number<br />
(two<br />
beams)<br />
< 5 × 10 11 0<br />
0 0<br />
0 0<br />
0<br />
< 1 × 10 13 8 0<br />
0<br />
0 2<br />
10<br />
< 3 × 10 13 8 18<br />
0<br />
0 2<br />
28<br />
2007 run goals<br />
Full system 14 30 18 28<br />
2<br />
92<br />
TCT not required if triplet is not aperture bottle-neck<br />
(as foreseen) No squeeze below 11m!<br />
Courtesy R.Assman<br />
L.R. <strong>Evans</strong> – EDMS Document 805670 33
The power converters and <strong>the</strong> associated systems<br />
952 / 968 already installed<br />
L.R. <strong>Evans</strong> – EDMS Document 805670 34
Powering areas<br />
18kV for <strong>the</strong> dipole circuits<br />
400V for <strong>the</strong> o<strong>the</strong>rs<br />
UPS for all converters<br />
above 4 kA<br />
PC<br />
UA, UJ, RR<br />
DCCT<br />
Water<br />
Short Circuit<br />
tunnel, UJ<br />
L.R. <strong>Evans</strong> – EDMS Document 805670 35
2007: <strong>the</strong> year <strong>of</strong> commissioning<br />
Point 2<br />
Point 4<br />
Point 6<br />
Point 8<br />
L.R. <strong>Evans</strong> – EDMS Document 805670 36
Engineering run: objectives<br />
• Commission essential safety systems<br />
• Commission essential beam instrumentation<br />
• Commission essential hardware systems<br />
• Perform beam based measurements to check:<br />
- Polarities<br />
- Aperture<br />
- Field characteristics<br />
• Establish collisions<br />
• Provide stable two beam operation at 450 GeV<br />
• Interleave collisions with fur<strong>the</strong>r machine<br />
development, in particular, <strong>the</strong> ramp.<br />
• Optics:<br />
– β*= 11 m in IR 1 & 5<br />
– β*= 10 m in IR 2 & 8<br />
– Limited by triplet aperture<br />
• Crossing angles <strong>of</strong>f<br />
– 1, 12, 43, 156 bunches<br />
per beam<br />
• Separation bumps - two beam<br />
operation<br />
• Shift bunches for <strong>LHC</strong>b<br />
– 4 out <strong>of</strong> 43 bunches, or<br />
24 bunches out <strong>of</strong> 156<br />
• Solenoids & Experimental<br />
Dipoles etc. <strong>of</strong>f (to start with)<br />
Provide a firm platform for <strong>the</strong> commissioning to 7 TeV and<br />
provide adequate lead time for problem resolution.<br />
L.R. <strong>Evans</strong> – EDMS Document 805670 Courtesy M.Lamont<br />
37
Engineering run: <strong>the</strong> phases <strong>of</strong> beam commissioning<br />
1<br />
2<br />
3<br />
4a<br />
4b<br />
5a<br />
5b<br />
Phase<br />
First turn<br />
Establish circulating<br />
beam 100 h lifetime<br />
Initial commissioning<br />
Measurements<br />
System<br />
commissioning<br />
Two beam operations<br />
Collisions<br />
Main Objectives<br />
End TI2, TI8, injection region, BPMs, BLMs, thread<br />
first turn, polarity checks<br />
Closed orbit, chromaticity, energy matching, tune,<br />
RF capture<br />
RF, control & correction, transverse diagnostics,<br />
linear optics checks, BLMs, beam dump, machine<br />
protection<br />
Beta beating, aperture, field quality checks, transfer<br />
functions<br />
RF, transverse feedback, BLMs to MPS, tune PLL,<br />
collimators and absorbers<br />
Parallel injection, separation bumps,<br />
instrumentation and control<br />
Establish collisions, luminosity monitors,<br />
collimation, solenoids<br />
6 Increase intensity<br />
Collimators, LFB, multi-batch injection<br />
Courtesy M.Lamont<br />
L.R. <strong>Evans</strong> – EDMS Document 805670 38
Conclusion and milestones<br />
A solid and confirmed progression <strong>of</strong> transport, installation<br />
interconnection rates as well as <strong>of</strong> quality assurance (mechanical,<br />
electrical, etc) and commissioning. The first sector (7-8) was pressure<br />
tested on Saturday-Sunday November 25. Some problem was found in<br />
<strong>the</strong> inner triplet but <strong>the</strong> whole arc was fully commissioned.<br />
The CERN has shown its ability to solve <strong>the</strong> various production and<br />
installation problems (e.g. DFB) it has encountered; <strong>the</strong> present ones<br />
(collimators) are being addressed and solved.<br />
The engineering run at 450 GeV for 2007 remains a top priority.<br />
However, to achieve it, <strong>the</strong> inner triplet problem must be solved quickly.<br />
<br />
Last magnet delivered November 2006<br />
Last magnet tested January 2007<br />
Last magnet installed March 2007<br />
<strong>Machine</strong> closed August 2007<br />
First collisions 450 GeV November 2007<br />
First Collisions 7 TeV June 2008<br />
L.R. <strong>Evans</strong> – EDMS Document 805670 39
Change language