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1TS Department / Civil Engineering Group17 October 2007
Civil Engineering Layouts & Tunnel Cross Section
CLIC workshop – Working group: Two beam hardware and Integration
CLIC Civil Engineering Layouts & Tunnel Cross Section
John Osborne TS-CEAcknowledgements : C.Wyss, J-L Baldy, N.Baddams
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2TS Department / Civil Engineering Group17 October 2007
Civil Engineering Layouts & Tunnel Cross Section
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3TS Department / Civil Engineering Group17 October 2007
Civil Engineering Layouts & Tunnel Cross Section
Dewatering tunnel for possible water inflows in Limestone Rock required CERN Prevessin Site
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4TS Department / Civil Engineering Group17 October 2007
Civil Engineering Layouts & Tunnel Cross Section
20mrad
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5TS Department / Civil Engineering Group17 October 2007
Civil Engineering Layouts & Tunnel Cross Section
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6TS Department / Civil Engineering Group17 October 2007
Civil Engineering Layouts & Tunnel Cross Section
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7TS Department / Civil Engineering Group17 October 2007
Civil Engineering Layouts & Tunnel Cross Section
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8TS Department / Civil Engineering Group17 October 2007
Civil Engineering Layouts & Tunnel Cross Section
UTRB Caverns to be deleted ?
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9TS Department / Civil Engineering Group17 October 2007
Civil Engineering Layouts & Tunnel Cross Section
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10TS Department / Civil Engineering Group17 October 2007
Civil Engineering Layouts & Tunnel Cross Section
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11TS Department / Civil Engineering Group17 October 2007
Civil Engineering Layouts & Tunnel Cross Section
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12TS Department / Civil Engineering Group17 October 2007
Civil Engineering Layouts & Tunnel Cross Section
• Possible Modifications to be studied on General Layouts :
– Delete UTRB Caverns
– Reduced Number of sectors to 24 (from 26) per side
– Increase drive beam sector length to 868m (from 810m)
Overall parametercenter of mass energy 3 Tevmain linac RF frequency 11.994 GHzluminosity 5.9x1034 cm-2s-1
unloaded/loaded gradient 120/100 MV/mproposed site length 49.7 kmoveral two linac length 41.7 km
Main linac fill factor 78.6accelerator structure length 229 mm
DeceleratorNo. of drive beam sector/linac 24Drive beam sector length 868 mNo. of PETS per sector 1491Length of PETS (active) 213 mmNominal output RF power /PETS 136 MWTransfer effeiciency PETS - acc. structure 93.8 %No. of acc. structure / PETS 2Main beam acc. power / PETS 2x63.9 MWEnergy (injection 2.38 GevEnergy (final) 238 MeV
-----------------------------
ModuleNo. of module per sector 428No. of module per linac 10275No. of modules (2 linacs) 20549
Acc. structure PETSNo. per sector 2982 1491No. per linac 71568 35784No. (2 linacs) 143136 71568
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13TS Department / Civil Engineering Group17 October 2007
Civil Engineering Layouts & Tunnel Cross Section
• Tunnel Cross Section
– Thanks to C.Wyss for carrying out this study up to now. In particular CLIC Technical Note :
– CLIC-Tech-Note-003 dated 20 August 2007
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14TS Department / Civil Engineering Group17 October 2007
Civil Engineering Layouts & Tunnel Cross Section
• The tunnel diameter has been initially dimensioned for the following items :– The CLIC machine, with their drive and main
beam machine components.– The 2.4 GeV and 9 GeV transfer lines for the
drive and main beams, respectively– An Installation corridor for the transportation
of machine modules for installing and/or replacement.
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15TS Department / Civil Engineering Group17 October 2007
Civil Engineering Layouts & Tunnel Cross Section
• Machine Services (1) :– Supply and return manifolds for demineralised water
cooling.– Raw water supply and return.– Drainage pipe embedded in concrete invert for any
water seepage– Compressed air for PETS on/off mechanism– Nitrogen distribution, if any– One or two 40mm duct(s) for optical fibre links– Two or three 500mm wide cable trays for dc power
cables.
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16TS Department / Civil Engineering Group17 October 2007
Civil Engineering Layouts & Tunnel Cross Section
• Machine Services (2) :– A free section of at least 70cm width by 200cm
for personnel passage between a module and the tunnel wall.
– One 500mm wide cable tray for low power and signal cables for the RF system
– One 500mm wide cable tray for beam instrumentation, survey and vacuum systems
– One 300mm wide cable tray for the power cables of the transfer lines
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17TS Department / Civil Engineering Group17 October 2007
Civil Engineering Layouts & Tunnel Cross Section
• Machine Services (3) :– One 200mm wide cable tray for the cables of the
vacuum and beam instrumention systems of the transfer lines
– The Low-Voltage (400V) distribution– 5 Cables for Medium Voltage (36KV). These cables
will bring power from Prevessin Site central Area to other sites
– Secure Low Voltage Electricity– Power for the transport vehicles– No mono-rail type transport included for the
moment
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18TS Department / Civil Engineering Group17 October 2007
Civil Engineering Layouts & Tunnel Cross Section
• Tunnel Services :
– Normal Lighting
– Leaky feeder for mobile telephones
– Public address system
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19TS Department / Civil Engineering Group17 October 2007
Civil Engineering Layouts & Tunnel Cross Section
• Safety Systems :– Panels with emergency lighting, emergency
stops, red telephones– Evacuation push-buttons (break glass type)
and sirens– Emergency radio communication for fire
brigade– Radiation monitors– Oxygen deficiency monitors?
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20TS Department / Civil Engineering Group17 October 2007
Civil Engineering Layouts & Tunnel Cross Section
• Alignment and Tunnel tolerances
– Space has been recently allocated for alignment systems
– A radial allowance for construction tolerances has been included (10cm)
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21TS Department / Civil Engineering Group17 October 2007
Civil Engineering Layouts & Tunnel Cross Section
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22TS Department / Civil Engineering Group17 October 2007
Civil Engineering Layouts & Tunnel Cross Section
• Further in-depth studies needed to better define tunnel cross section, in particular for :
– Demineralised Water (ΔT to be better understood) and maximum flow to avoid vibration problems.
– Ventilation System to comply with current Safety requirements for emergency situations.
– (see talk by J. Inigo-Golfin)
– Next iteration deadline with updated parameters ?