1. HL-LHC Post MSO optimisation, Complementary considerations for Q4
S. Claudet (TE-CRG)
With contributions from M. Sisti & J. Metselaar for Cryogenics
07Jun’19

2. Towards new baseline following MSO Aut’18
1) MSO Aut’18 LHCQXL__0004 (5R)
Re-use QRL & DSL
! CC !
2) CC interfaces LHCQXL__0011 => Need to re-design Q4 interfaces (not DSL)
! SM !
Q4-DSL
3) Considerations of Q4 correctors => Need to “cross” Q4 & Service modules L1-R (+10m DSL !)
Only preliminary considerations done so far (see next)
07Jun'19
HiLumi Cryogenics, MSO complements for Q4

3. HiLumi Cryogenics, MSO complements for Q4
(impact: + 6m DSL )
07Jun'19
HiLumi Cryogenics, MSO complements for Q4

4. HiLumi Cryogenics, MSO complements for Q4
07Jun'19
HiLumi Cryogenics, MSO complements for Q4

5. HiLumi Cryogenics, MSO complements for Q4
07Jun'19
HiLumi Cryogenics, MSO complements for Q4

6. HiLumi Cryogenics, MSO complements for Q4
07Jun'19
HiLumi Cryogenics, MSO complements for Q4

7. SC link thermal shield supply Thermal shield circuit
Summary table
IP1-left
IP1-right
IP5-left
IP5-right Q4 Q5 Q6
left
right*
left*
right RD CL KD EE LD
CC’ FF
CL2
CL1 5 4 8 3 6
Beam screen circuit
SHe supply
SC link thermal shield supply
Thermal shield circuit
GHe return
GHe from SC link return
* new Q4 jumper (former D2)
07Jun'19
HiLumi Cryogenics, MSO complements for Q4

8. IP1-left (ref. LHCLSQR_0107)4
07Jun'19
HiLumi Cryogenics, MSO complements for Q4

9. IP1-right (ref. LHCLSQR_0035)4
07Jun'19
HiLumi Cryogenics, MSO complements for Q4

10. IP5-left (ref. LHCLSQR_0043)
07Jun'19
HiLumi Cryogenics, MSO complements for Q4

11. IP5-right (ref. LHCLSQR_0044)
07Jun'19
HiLumi Cryogenics, MSO complements for Q4

12. Elementary units of QRL “LEGO-like”
07Jun'19
HiLumi Cryogenics, MSO complements for Q4

13. X QRL kept untouched Kept to avoid removing Q6
Translated, with possible “minor” adjustments of length
QRL kept untouched X
Length to be adjusted re-using elementary components
07Jun'19
HiLumi Cryogenics, MSO complements for Q4