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DOSE TO WARM MAGNETS
E. Skordis & F. Ceruttiloss input by: E. Quaranta, R. Bruce and S. Redaelli
Protection screen design with: P. Fessia , L. Favre, P. A. Thonet
2/9/2013 Collimation Working Group E. Skordis 1
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IR3:THE TCAPD ROLE
(@7 TeV)
2/9/2013 Collimation Working Group E. Skordis 2
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IR3 Geometry and Sixtrack Lossmap profile
Beam 1
MBW.C6L3
TCAPA.6L3
MQWA.CE5L3MQWA.E5L3
TCAPD.6L3
MBW.B6L3 MBW.A6L3
TCSG.5L3TCP.6L3
Z (m)
Coun
ts Average interaction depth: 47 μm
Average interaction longitudinal position: 14.9 cm
All particles are impacting the inner jaw.
2/9/2013 Collimation Working Group E. Skordis 3
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MBW Peak Dose profile [I]
Beam 1
MBW.C6L3
TCAPA.6L3
MQWA.CE5L3MQWA.E5L3
MBW.C6L3
MBW.B6L3
TCAPD.6L3
MBW.B6L3 MBW.A6L3
TCSG.5L3
Beam 1 Beam 1
obviously the TCAPD plays no role
MBW.A6L3
TCP.6L3
2/9/2013 Collimation Working Group E. Skordis 4
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MBW.C6L3
Beam 1
MBW.C6L3
TCAPA.6L3
MQWA.CE5L3MQWA.E5L3
MBW.B6R7
TCAPD.6L3
MBW.B6L3 MBW.A6L3
TCSG.5L3
Beam 1
Beam 2 @ 6.5 TeV
MBW Peak Dose profile [II]
(per proton lost)2/9/2013 Collimation Working Group E. Skordis 5
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MQWA.E5L3 Peak Dose profile
Beam 1
the TCAPD halves the dose
2/9/2013 Collimation Working Group E. Skordis 6
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MQWA.E5L3 Peak Dose profile
Beam 1
MQWA.E5R7
Beam 2 @ 6.5 TeV
(per proton lost)
2/9/2013 Collimation Working Group E. Skordis 7
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MQWA.D5L3 Peak Dose profile
Beam 1
2/9/2013 Collimation Working Group E. Skordis 8
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MQWA.C5L3 Peak Dose profile
Beam 1
the most impacted one!following the TCSG
2/9/2013 Collimation Working Group E. Skordis 9
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MQWA.5L3 Peak Dose profile
Beam 1
2/9/2013 Collimation Working Group E. Skordis 10
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MQWA.B5L3 Peak Dose profile
Beam 1
2/9/2013 Collimation Working Group E. Skordis 11
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MQWA.A5L3 Peak Dose profile
Beam 1
2/9/2013 Collimation Working Group E. Skordis 12
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MQWA.E4L3 Peak Dose profile
Beam 1
2/9/2013 Collimation Working Group E. Skordis 13
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Conclusions
• The TCAPD halves the peak dose in the MQW directly protected (MQWA.E5L3)
• However for the most impacted one (MQWA.C5L3), following the TCSG, the reduction is limited to ~ 30%
• The effectiveness of a dedicated shielding, to be embedded in the magnet, is under study (See next part)
2/9/2013 Collimation Working Group E. Skordis 14
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IR7:Possible protection screen effect
(@6.5 TeV)
2/9/2013 Collimation Working Group E. Skordis 15
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MBWA - MBWB Peak Dose profileBeam 2
MBW.BMBW.A
TCAP
MQWA.E5R7MQWA.D5R7
2/9/2013 Collimation Working Group E. Skordis 16
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MBWA - MBWB Peak Dose profile
MBW.A6R7 MBW.B6R7
Beam 2Beam 2
Normalization: 1.15 1016 p (50 fb-1 )
MBW.A6R7 with Flanges
Beam 2
MBW.B6R7With Flanges
Beam 2
2/9/2013 Collimation Working Group E. Skordis 17
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MBWA - MBWB Peak Dose profile
MBW.A6R7Flanges +
Protection
MBW.B6R7 Flanges +
Protection
Beam 2Beam 2
MBW.A6R7 with Flanges
Beam 2
MBW.B6R7With Flanges
Beam 2
2/9/2013 Collimation Working Group E. Skordis 18Normalization: 1.15 1016 p (50 fb-1 )
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MBWB Dose 2d cross section at maximum No protection
Dose (MGy)
2/9/2013 Collimation Working Group E. Skordis 19Normalization: 1.15 1016 p (50 fb-1 )
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MBWB Dose 2d cross section at maximum With protection
Dose (MGy)
2/9/2013 Collimation Working Group E. Skordis 20Normalization: 1.15 1016 p (50 fb-1 )
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MQWA.E5R7 Peak Dose Profile
Beam 2Beam 2
Old ModelWith Flanges
2/9/2013 Collimation Working Group E. Skordis 21Normalization: 1.15 1016 p (50 fb-1 )
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MQWA.E5R7 Peak Dose Profile
Beam 2
2/9/2013 Collimation Working Group E. Skordis 22Normalization: 1.15 1016 p (50 fb-1 )
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MQWA.D5R7 Peak Dose Profile
Beam 2
2/9/2013 Collimation Working Group E. Skordis 23Normalization: 1.15 1016 p (50 fb-1 )
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MQWA.C5R7 Peak Dose Profile
Beam 2
2/9/2013 Collimation Working Group E. Skordis 24Normalization: 1.15 1016 p (50 fb-1 )
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MQWA. 5R7 Peak Dose Profile
Beam 2
2/9/2013 Collimation Working Group E. Skordis 25Normalization: 1.15 1016 p (50 fb-1 )
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MQWA.B5R7 Peak Dose Profile
Beam 2
2/9/2013 Collimation Working Group E. Skordis 26Normalization: 1.15 1016 p (50 fb-1 )
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MQWA.A5R7 Peak Dose Profile
Beam 2
2/9/2013 Collimation Working Group E. Skordis 27Normalization: 1.15 1016 p (50 fb-1 )
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MQWA.E4R7 Peak Dose Profile
Beam 2
2/9/2013 Collimation Working Group E. Skordis 28Normalization: 1.15 1016 p (50 fb-1 )No protection was added to this model
Protection Is needed due to comparable Peak dose with MQWA.E5R7
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MQWA.E5R7 Dose 2d cross section
2/9/2013 Collimation Working Group E. Skordis 29
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MQWA.E5R7 Dose 2d cross section
2/9/2013 Collimation Working Group E. Skordis 30
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MQWA.E5R7 Dose 2d cross section
2/9/2013 Collimation Working Group E. Skordis 31
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5770
5670 2310
1780
1670
50
70
2030 2130
22301950
50 110
500 110
1250720
370
210
290
570
4550 640
1290
Values are in pJoule/proton lost in the collimators
MQWA.E Energy Deposition on varius elements
2/9/2013 Collimation Working Group E. Skordis 32
60
2020
90
With Protection
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Temperature Increase in protective Elements
2/9/2013 Collimation Working Group E. Skordis 33
MBW MQW-front MQW-mid MQW-Top/Bot
( GeV/p)1.6 5.9 4.7 2.8
(Kg)3.2 12.8 8.7 14
Temp Increase (°/s)0.055 0.050 0.059 0.022
0.91011 𝑝𝑠 (𝐵𝑒𝑎𝑚𝑙𝑖𝑓𝑒𝑡𝑖𝑚𝑒𝑜𝑓 1h )
𝑎=¿𝐺𝑒𝑉𝑝 𝑑𝑒𝑝𝑜𝑠𝑖𝑡𝑒𝑑𝑖𝑛 h𝑡 𝑒𝑒𝑙𝑒𝑚𝑒𝑛𝑡 𝑖𝑛𝑠𝑡𝑢𝑑𝑦
𝑏=𝑚𝑎𝑠𝑠𝑜𝑓 𝑒𝑙𝑒𝑚𝑒𝑛𝑡𝑖𝑛 𝑠𝑡𝑢𝑑𝑦
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Conclusions
• The protection screen for the MBWs provides a peak reduction of a factor of 3
• For the MQWs the effect is again a reduction of a factor of 3, however, increasing the radius of the front cylindrical screen and increasing the length of the inner protection could improve performance
• Design to be finalised (Cabling)
2/9/2013 Collimation Working Group E. Skordis 34