TT 20TDC 2 beam loss CENF project technical

TT 20/TDC 2 beam loss CENF project technical meeting 21. 3. 2013

Beam loss in TT 20/TDC 2 (400 Ge. V protons) Beam loss point in TT 20 … hitting a 10 cm diameter, 1 m long cu-cylinder 15 m long concrete block sti ali Re 3 e 13 protons/spill towards TDC 2 • 1‰ protons lost per spill 3 e 10 p/spill Assuming 16. 8 s SPS supercycle time -> 1. 8 e 9 protons/s • 5% protons lost on first splitter in TDC 2 Assuming 16. 8 s SPS supercycle time -> 8. 9 e 10 protons/s c? Beam loss point splitter … hitting a 10 cm diameter, 1 m long cu-cylinder

Junction cavern TT 20 Concrete block H*(10) (from hadrons & muons) in TT 26 1 ‰ beam loss in TT 20 TT 26 TDC 2 100 m Ambient dose equivalent rate in TT 26: up to ~100 u. Sv/h

Junction cavern TT 20 Concrete block H*(10) (from muons) in TT 26 1 ‰ beam loss in TT 20 TT 26 TDC 2 100 m Ambient dose equivalent rate in TT 26: up to ~100 u. Sv/h

Junction cavern TT 20 Concrete block H*(10) (from hadrons & muons) in TT 26 5 % beam loss on first splitter in TDC 2 TT 26 TDC 2 100 m Minimum lateral concrete thickness between TT 20 and TCD 2 is 1. 5 m Ambient dose equivalent rate in TT 26: up to ~100 m. Sv/h (mainly neutron) Note: we also have a second splitter in TCD 2

Junction cavern Concrete block H*(10) (from hadrons & muons) in TT 26 5 % beam loss on first splitter in TDC 2 TT 26 ~ 9 m concrete needed (laterally to the splitter) to shied to 0. 1 u. Sv/h