LBNF status
Process to chose 2 SPs
• Candidates who accepted (vote starts the 27th):
Milind Diwan Chang Kee JungSanjib MishraAndre RubbiaJim StraitMark ThomsonBob Wilson
EFIG activities
• Accepted : 1 type of cryostatsNext:– Define cavern layout– Define cryostat technology (3 options)– Define cryogenics logistics– Define infrastructure (clean room, cranes,
access, ..)
4
Alternative 1 - (4) 10 kT near RossCartoon
5
Alternative 3 – 10+30 kTCartoon
6
Cryostat size > 10 kt eff)
15 m
14m
15.1m
19 m
26 m
Length : 1+0.8+62+0.8+1+1.5+15 = 82.5 m
Width : 1+0.8+15.1+0.8+1= 18.7 = 19 m
Crown Height : 0.5+0.6+0.8+14+0.8+0.3 +9 = 26 m** Still need to be optimized
Membrane inner volume : 62.0 x 15.1 x 14 = 13’107 m3
Volume to excavate : 82.5 x 15.1 x 14 = 40’755 m3
(for simplicity we assume a flat roof, CF engineers to optimize it)
Pit dimensions:
END VIEW
Mexineen area14m
62 m
82.5 m
Mezzanine9m
Top of cryostat steel: 0.5+0.6+0.8+14+0.8+0.3 = 17 m 17 m
Cryostat type
3 solutions (all membrane cryostats):
warm vessels:- concrete wall attached to the cavern walls
- standalone concrete structure (LBNO)- standalone Fe structure (CERN)
criteria : safety, schedule, cost, who pays
Where the cryogenics
Where the cryogenics
Mexineen area14m
62 m
82.5 m
Mezzanine9m
Mexineen area14m
62 m
82.5 m
Mezzanine9m
CDR
• Discussions ongoing on the layout/structure
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