Upload
zona
View
29
Download
0
Tags:
Embed Size (px)
DESCRIPTION
3 rd Joint HiLumi , LHC-LARP Annual M eeting 11-15 November 2013, Daresbury Laboratory . Cryogenics for HL-LHC. Laurent Tavian , Cryogenic Group, Technology Department, CERN With the contribution of K. Brodzinski , G. Ferlin , U. Wagner & R. van Weelderen. Content. - PowerPoint PPT Presentation
Citation preview
The HiLumi LHC Design Study (a sub-system of HL-LHC) is co-funded by the European Commission within the Framework Programme 7 Capacities Specific Programme, Grant Agreement 284404.
Cryogenics for HL-LHC
Laurent Tavian, Cryogenic Group, Technology Department, CERN
With the contribution of K. Brodzinski, G. Ferlin, U. Wagner & R. van Weelderen
3rd Joint HiLumi, LHC-LARP Annual Meeting11-15 November 2013, Daresbury Laboratory
Content
• Overall HL-LHC cryogenic layout• Beam parameter & heat loads
• HL-LHC and Sector cryoplants • Cryogenic layout proposals at:
• Points 1, 2, 5 and 7 for cryo-collimators• Point 7 for SC links• Point 4 for RF insertion• Point 1 and Point 5 for new high-luminosity insertions
• Rough estimate of buildings and utilities requirements• Schedule, organization and conclusion
Overall HL-LHC cryogenic layout• HL-LHC cryo-upgrade:
• 2 new cryoplants at P1 and P5 for high luminosity insertions
• 1 new cryoplant at P4 for SRF cryomodules
• New cooling circuits at P7 for SC links and deported current feed boxes
• Cryogenic design support for cryo-collimators and 11 T dipoles at P1, P3, P5 and P7
P7
P8
P6
P5
P4
P3
P2
P1 Existing cryoplantNew HL-LHC cryoplantCryo-collimator
Beam parameters (impacting cryo) for HL-LHC
Parameters Nominal HL-LHCBeam energy, E [TeV] 7 7Bunch population, Nb [# p / bunch] 1.15E+11 2.2E+11Number of bunches, nb [-] 2808 2760Luminosity P1 and P5, L [Hz/cm2] 1E+34 5E+34Bunch length, σ [ns] 1 1
x ~2
x 5
Nominal HL-LHC RemarkBeam screen circuit (arc + DS) [mW/m] Based on LHC measurementBeam screen circuit (IT) [mW/m] Based on LHC measurementBeam screen circuit (MS) [mW/m] Based on LHC measurementCold mass (arc + DS) [mW/m] Based on LHC measurementCold mass (IT) [mW/m] Based on LHC measurementCrab-cavities [W per module] 0 25 Only for HL-LHCCold mass (MS) [mW/m] Based on LHC measurement400 MHz RF module [W per module] Based on measurement800 MHz RF module [W per module] 0 120 Only for HL-LHCElectron-lens [W per module] 0 12 Only for HL-LHC
20-300 K Current lead [g/s per kA] 0.035 Based on LHC current leadsSynchrontron radiation (arc + DS) [mW/m per beam] 165 310 Based on scaling from DR dataImage current (arc + DS + MS) [mW/m per beam] 145 522 Scaling from 2012 measurementImage current (IT low-luminosity) [mW/m] 475 1698 Based on present IT designImage current (IT high-luminosity) [mW/m] 166 596 Based on B. Salvant dataE-clouds (arc + DS) (dipole off) [mW/m per beam] 271 41 Based on Giovanni's data E-clouds (arc + DS) (dipole on) [mW/m per beam] 4264 4097 Based on Giovanni's data E-clouds (IT high luminosity) [mW/m] 5500 9455 Based on Giovanni's data (D1 missing)E-clouds (IT low-luminosity) [mW/m] 5500 5500 Based on Giovanni's dataE-clouds (MS) [mW/m per beam] 2550 383 Based on Giovanni's dataSecondaries (IT beam screen P1 andP5) [W per IT] 0 650 Based on F. Cerutti dataBeam gas scatering [mW/m per beam] 24 45 Scaling from 2012 measurementResistive heating in splices [mW/m] 56 56 Scaling from 2012 measurementSecondaries (IT cold mass P1 and P5) [W per IT] 155 630 Based on F. Cerruti dataSecondaries (DS cold mass P1 and P5) [W per DS] 37 185 Based on scaling from DR dataQrf crab-cavities [W per module] 0 24 Only for HL-LHCQrf 400 MHz [W per module] 101 366 Based on scaling from DR dataQrf 800 MHz [W per module] 0 183 Only for HL-LHCE-lens [W per module] 0 2 Only for HL-LHC
20-300 K Current lead [g/s per kA] Based on LHC current leads
3556
Dynamic heat load
4.6-20 K
1.9 K
4.5 K
240
0.035
Static heat
inleaks
4.6-20 K
1.9 K
4.5 K
1401255781701250
Heat loads To be validated by the Heat Load Working Group!
Sector cryoplants
0
500
1000
1500
2000
2500S1
2
S45
S56
S81
Inst
alle
d
S23
S34
S67
S78
Inst
alle
d
High-load sector Low-load sector
1.9
K co
olin
g ca
paci
ty [W
] Nominal
HL-LHC
0
1000
2000
3000
4000
5000
6000
7000
8000
S12
S45
S56
S81
Inst
alle
d
S23
S34
S67
S78
Inst
alle
d
High-load sector Low-load sector
4.6-
20 K
coo
ling
capa
city
[W] Nominal
HL-LHC
05
1015202530354045
S12
S45
S56
S81
Inst
alle
d
S23
S34
S67
S78
Inst
alle
d
High-load sector Low-load sector20
-300
K c
oolin
g ca
paci
ty [g
/s] Nominal
HL-LHC
0
5000
10000
15000
20000
25000
30000
35000
S12
S45
S56
S81
Inst
alle
dS2
3S3
4S6
7S7
8In
stal
led
High-load sector Low-load sector
50-7
5 K
cool
ing
capa
city
[W] Nominal
HL-LHC
0
5000
10000
15000
20000
25000
30000
S12
S45
S56
S81
Inst
alle
dS2
3S3
4S6
7S7
8In
stal
led
High-load sector Low-load sector
4.6-
20 K
coo
ling
capa
city
[W]
Nominal
HL-LHC
With successful dipole
scrubbing(e-cloud only in quadrupoles)
With e-cloud in dipoles and quadrupolesThe main concerns
(showstopper!)
Cold masses Current leads Thermal shields
Beam screens
P7
P8
P6
P5
P4
P3
P2
P1
Cryo-collimators at Pt1, Pt2, Pt5 and Pt7
Cryogenics design support :Main cryogenics constraints: Continuity of the cell cooling (bayonet HX, free section of pressurized HeII), hydraulic impedance for cool-down, warm-up and quench discharge…
DFBA Q7 Q8 Q9 Q10 Q11MB MB MB MB MB MB MB MB
DFBA Q7 Q8 Q9 Q10 Q11MB MB MB MB MB MBB BB B
Nominal layout
Upgrade layout
MB
MB
Dispersion suppressor
Continous cryostat
Standard 8.3 T main bending magnet (dipole)
New 11 T bending magnet
Collimator (beam 2)
Collimator (beam 1)
Cryogenic bypass
Good progress in collaboration
with WP5 and WP11
P7
P8
P6
P5
P4
P3
P2
P1
New SC links at P7
Cryogenics design support:Optimisation of the SC link cooling taking into account fixed boundary conditions imposed by the existing cryogenic distribution scheme (QRL headers P, T…)
DFBA Q7 MBDFBAQ7MB
Q7 MBQ7MB
Tech
nica
lga
llery
TZ7
6
Main tunnelDFBAQ6 Q6
Q6Q6SC link SC link
P7
Nominal layout
Upgrade layout
DFBL
DFBL
Warm recovery line
In progress in collaboration
with WP6
P7
P8
P6
P5
P4
P3
P2
P1
Upgrade of the RF insertion
D3 D3
P4Nominal layout
400 MHzRF RF RFRF
400 MHz 400 MHz 400 MHzMain tunnel
D3 D3
P4Upgrade layout
400 MHzRF RF RFRF
400 MHz 400 MHz 400 MHz800 MHzRF
800 MHzRFe-lens e-lens
Cryogenics design support for:• New 800 MHz (200 MHz?) cavity module• New electron lenses
Just started in collaboration
with WP4 and WP5
P7
P8
P6
P5
P4
P3
P2
P1
New cryogenic infrastructure at P4
D3 Q6
P4
400 MHzRF RF RFRF
400 MHz 400 MHz 400 MHz800 MHz 800 MHzRFe-lens e-lens
QUI
RF
LCB
Cavern
WCS Storage
Shaft
New infrastructure
Cryogenic distribution lineWarm recovery lineWarm piping
- 1 warm compressor station (WCS) in noise insulated surface building- 1 lower cold box (LCB) in UX45 cavern- 1 valve box in UX45 cavern- 2 main cryogenic distribution lines- 2 interconnection lines with existing QRL service modules
QRL QRL
P4 cryogenic process & flow diagram
New refrigeratorcold box
UX45
Size of new RF cryoplant (provisional)
Temperature level Static Dynamic Installed Equivalent installed capacity @ 4.5 K [kW]
4.5 K [W] 1344 1736 5132 5.5 5.750-75 K [W] 1000 0 2250 0.2
Uncertainty coefficient, fu: 1.25 for existing component (400 MHz RF module) 1.5 for new equipment
Overcapacity coefficient, fo: 1.5
(Qsta*fu + Qdyn)*fo
To be validated by the Heat Load Working Group!
P7
P8
P6
P5
P4
P3
P2
P1
Upgrade of the P1 & P5 insertions
Cryogenics design support for new cryo-assemblies (CC, IT & MS cryomagnets, DFBs, SC links…)
Q1Q2Q3DFBXD1Q4 D2Q5Q6DFBAQ7MB
Q1Q2Q3D1Q4 D2Q5Q6Q7MB
DFBL
SC link
CC
IP1 orIP5
DFBL
Ground level
Shaft
Main tunnel
Nominal layout
Upgrade layout
SC links
DFBX
CC CPDFBA In progress in collaboration
with WP3 and WP4
Well advanced for magnet cooling
Under investigation for CC and BS cooling
2 modules of 4 cavities
Arc current feed boxesremain in the tunnel
P7
P8
P6
P5
P4
P3
P2
P1
New cryogenic infrastructure at P1 and P5
- 1 warm compressor station (WCS) in noise insulated surface building- 1 upper cold box (UCB) in surface building- 1 cold quench buffer (QV) in surface- 1 or 2 cold compressor boxes (CCB) in underground cavern- 2 main cryogenic distribution lines- 2 interconnection valve boxes with existing QRL
Q1Q2Q3D1Q4 D2Q5Q6Q7MB CC
DFBL
Ground level
Shaft
DFBX UCB
WCS
QB
Storage
CCB
DFBLDFBX
Q2Q1
Cavern
QRL
SC linkCryogenic distribution lineWarm recovery lineWarm piping
CC CPDFBA
Critical integration
issue
Size of new IT cryoplants (provisional)
Temperature level Static Dynamic Installed Equivalent installed capacity @ 4.5 K [kW]
1.9 K [W] 433 1380 3045 12
184.5 K [W] 196 8 452 0.54.6-20 K [W] 154 2598 4243 2.450-75 K [W] 4900 0 7350 0.520-300 K [g/s] 16 16 59 2.6
Uncertainty coefficient, fu: 1.5Overcapacity coefficient, fo: 1.5
(Qsta*fu + Qdyn)*fo
To be validated by the Heat Load Working Group!
What about possible redundancy with detector cryogenic plants?(~1.5 kW @ 4.5 K for CMS)(~3 kW @ 4.5 K for ATLAS)
Current lead cooling “à la LHC” to be reviewed with WP6 !
Number of cold compressor trains
0
500
1000
1500
2000
2500
3000
3500
4000
4500
5000
1.8 1.9 2 2.1
Tota
l coo
ling
pow
er [W
]
User temperature [K]
Single cold compressor train
Double cold compressor train
LHC sector
Present HL-LHC
M M M
HX HX
B A C D E F A B B C D E F
B' C D E F B' B' C D E F
HX
A
Minimum CCB requirement in cavern
Depending of thetotal cooling capacity and
operating temperature
Single CC trainDouble CC train Best for cavern integration
Global or distributed ?(500 W max size for distributed HX !)
500 W HX
2.2
K, 1
.3 b
ar
1.8
K, 1
6 m
bar
4.6
K, 3
bar
20 K
, 1.3
bar
50 K
, 20
bar
75 K
, 19
bar
Building and general service requirementsCryogenic system P1 and P5 P4
Warm compressor
building
Surface [m2] 700 500Crane [t] 20 20
Electrical power [MW] 4.6 2.0
Cooling water [m3/h] 540 227
Compressed air [Nm3/h] 30 20
Ventilation [kW] 250 100
Type [-] Noise-insulated (~108 dB_A)
Surface "SD"
building
Surface [mxm] 30x10 N/A
Height [m] 12 N/A
Crane [t] 5 N/A
Electrical power [kW] 50 N/A
Cooling water [m3/h] 15 N/A
Compressed air [Nm3/h] 90 N/A
Cavern
Volume [m3] 200 300
Local handling [t] 2 2
Electrical power [kW] 100 20
Cooling water [m3/h] 20 20
Compressed air [Nm3/h] 40 30
Provisional!
(+ access areas)
LHC schedule
Studies & designTenderingFabricationInstallationCommissioning
Studies & designTenderingFabricationInstallationCommissioning
Studies & designTenderingFabricationInstallationCommissioning
LS1 LS3LS2
New
Cry
o at
P4
Cold
pow
erin
gN
ew c
ryo
at P
1 an
d P5
20232012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022
Schedule
: Freeze of heat load requirement
P7 P1&P5
WP9-Cryogenics organization chartCoordinator : L. Tavian ( Dec’13) S. Claudet (Jan’14 )Co-coordinator: R. van Weelderen
Cryogenic infrastruture at P1 and P5L. Tavian ( Dec'13), S. Claudet (Jan'14 )
Cryogenics for new insertion magnets at P1 and P5R. van Weelderen (Cryo link-person for WP3)
Cryogenics for cryo-collimator at P1, P2, P5 and P7R. van Weelderen (Cryo link-person for WP5 & WP11)
Cryogenics for crab-cavities at P1 and P5K. Brodzinski (Cryo link-person for WP4 CC)
Members or alternates ofHLTC and P&LC Committees
Cryogenic infrastruture at P4G. Ferlin (Cryo link-person for WP4 RF & WP5 e-lens)
Cryogenics for cold powering at P1, P5 and P7U. Wagner (Cryo link-person for WP6)
Conclusion• Main contributions to other WPs: the cooling studies of cryogenic assemblies
have started:• Cooling studies of new magnet cold masses are well advanced• Cooling studies of inner triplet beam screens have started an are challenging
(12-22 W/m!)• Cooling studies for crab-cavities, cold powering and cryo-collimators follow the
development.• Test stations for SC link operational, for CC under commissioning
• Corresponding cryogenic infrastructure are under definition• The integration of cavern equipment (cold-compressor box(es)) at P1 and P5
remains a concern.• The size of the cryoplants remains compatible with the pre-design data (OK
with CtC) if the scrubbing of the beam screens is effective (at least for dipole magnets).