2. CT Hardware Overview and Issues
T. Kramer, J. Borburgh, E. Carlier, L. Ducimetieré, L. Sermeus
MTE Internal Review
06/07/2015

3. Content Hardware overview Known Issues and Planning Introduction to CT
Pedestal System
New Staircase Generator
Emittance Reduction Dipoles
Septa
Spares
Known Issues and Planning
06/07/2015
MTE Internal Review

4. Continuous Transfer System (CT)
Hardware Overview
Continuous Transfer System (CT)
06/07/2015
MTE Internal Review

5. The magic true PS kicker team!
06/07/2015
MTE Internal Review

6. (Generators, Controls)
DFA-254
DFA-242
SEH-31
CT Zone
(Generators, Controls)
BFA-21P
BFA-21S
SMH-16
BFA-9P
BFA-9S
06/07/2015
MTE Internal Review

7. Pedestal System (BFA-9P/21P, PGA, PGB)
2 independent generators to supply magnets 21P & 9P (for 5 PS turns)
maximum voltage: 30 kV (ppm controllable)
minimum voltage: 5 kV
delay between generators ppm controllable with 1 ns resolution
06/07/2015
MTE Internal Review

8. NSG System (BFA-9S/21S)
2 x 5 Pulse Forming Lines in series to supply magnets 21S & 9S (for 5 PS turns)
same voltage on both sides (ppm controllable with limitations)
maximum voltage on S1: 30 kV, S2 to S5: 38 kV; minimum 6 kV each
maximum ΔV between adjacent steps +30 kV
minimum ΔV between adjacent steps -5 kV
delay between steps and sides ppm controllable with 1 ns resolution
06/07/2015
MTE Internal Review

9. NSG PFL & Switch Tanks
06/07/2015
MTE Internal Review

10. ERD-1 (DFA 242) 1 generator to supply the magnet 242 in TT2
maximum voltage: 30 kV (ppm controllable with limitations)
minimum voltage: 5 kV
kick duration: 1 PS turn
06/07/2015
MTE Internal Review

11. ERD-2 (RSG, DFA-254)
5 Pulse Forming Lines in series to supply the magnet 254 in TT2
Voltage of each step ppm controllable (with limitations)
Maximum voltage on each step: 30 kV; minimum 6 kV
Minimum ΔV between adjacent steps -5 kV.
Delay between steps manually controllable with 1 ns resolution
06/07/2015
MTE Internal Review

12. ERD-2 (RSG) Pulse Generator
06/07/2015
MTE Internal Review

13. Septum SEH-31 Electrostatic beam slicing septum. Only used for CT.
190 kV operational voltage.
HV-generators located in Blg.359.
Not ppm! ΔV of 30kV takes ~35s.
Time between renovations: 2 years
06/07/2015
MTE Internal Review

14. SMH-16 Pulsed current: 29 kA, 3 ms
PS Extraction Septum used for all extraction from PS except the east area.
2 identical magnets powered in series.
Under vacuum, water cooled septum.
Pulsed current: 29 kA, 3 ms
Septum thickness: 3 mm
Lifetime: < pulses,
i.e ~ 2 years
Septum 3mm
06/07/2015
MTE Internal Review

15. (mT.m) @max voltage (kV) Kick angle at 14 GeV/c (mrad)
System Parameters
System
Pulse Shape
Pulse length
Kick strength
voltage (kV)
Kick angle at 14 GeV/c (mrad)
Kick
direction
Rise time
(10-90)%
(ns)
BFA-9P & 21P
Rectangle
5 PS turns 30
0.46
inside
~340
BFA-9S & 21S
Staircase 38
0.6
~600
DFA-242
1 PS turn 30
0.4
~350
DFA-254
SEH-31 - DC
0.95
outside
n.a.
SMH-16
Half sine with 3rd harmonic
~3.5 ms
2600 30
06/07/2015
MTE Internal Review

16. Spares (per 1/7/2015) FPS-Magnets FPS-Generators Septa Septa PCO
BFA: one tank and parts for one magnet of each type
DFA-242, DFA 254: no spares available
FPS-Generators
PGA/PGB: one complete spare generator set.
NSG/ERD1: several spare switch tanks, spare PFL drums.
RSG: Switch tanks: in-situ spare system (shares same tanks), spare PFL drums.
Septa
SEH 31: 2 second choice spares
SMH 16: 2 second choice spares + 1 new under construction (CONS)
Septa PCO
SEH 31: 2 operational; ABT/EC
SMH 16: 1, under the responsibility of TE/EPC
Controls: Either complete system available or spare parts.
06/07/2015
MTE Internal Review

17. Issues and planning
06/07/2015
MTE Internal Review

18. General Issues Maintenance issue:
Some systems have seen reduced maintenance, because of the initially planned out phasing.
Now need additional effort and resources to keep CT equipment running much beyond planned operational period.
Not in present ABT manpower plan!
06/07/2015
MTE Internal Review

19. Septa
SEH-31
If needed for operations after YETS renovation necessary (decision urgent). Renovation is manageable resource wise.
Resources need to be allocated for renovation.
Controls insourcing (from TE-EPC) desired if post LS2 operations requested.
SMH-16
Irradiation levels to be monitored (related to use of TPS15 and MTE).
Will be exchanged during YETS 2015/2016.
06/07/2015
MTE Internal Review

20. Building 359
Floor in CT zone is not leak tight anymore (cracks) - needs to be renovated (environmental protection related). Would need a longer stop.
Some unused equipment already removed during last YETS. Old RSG Generator 6 & 7, NSG 12 &12S to be removed (storage issue!). General cleaning needed.
Modification of structures and elevated gangways needed:
to increase safety and accessibility of RSG for maintenance,
to improve accessibility of FAK- and CT-zone by overhead crane.
06/07/2015
MTE Internal Review

21. CT Cable Consolidation
CT systems need cable replacement.
Not only because of ageing but mainly out of fire safety reasons (PVC sheath).
Occasion could be used for clean up in B.359 and consolidation of CT-area (already proposed for LS1).
B.359 and consolidation of CT-area : cables, frames, leak-tight floor, walkways
06/07/2015
MTE Internal Review

22. CT Cable Consolidation (II)
System
Quantity PFL [m]
Quantity Tx [m]
Spares [m] (PFL+TX)
Total
[m]
Pedestal -
2 367
394
2 761
NSG
4 440
888
1 554
6 882
ERD1
444
1 332
2 664
RSG
2 240
896
1 568
4 704
All
17 012
Without spares: m
Budget estimate:
860 kCHF for RG220 cables (50 CHF/m)
55 kCHF for 110 Lemo connectors (500 CHF per male)
20 kCHF for modifications
150 kCHF for FSU (Tx pulling, fit on drums, Lemo mounting, structure modifications)
Total: 1085 kCHF / 1 PY
Timeline:
LS2 (at least Tx cables)
Option:
Additional 2240m if ERD-1 is extended to 5 steps.
06/07/2015
MTE Internal Review

23. Pedestal System (PGA, PGB, BFA9P/21P)
Thyratron Protection Unit (TPU) and fast interlock renovation foreseen.
06/07/2015
MTE Internal Review

24. NSG (BFA-9S,21S) ERD-1 (DFA-242)
For both systems a DCPS and controls renovations has been done in LS1.
Upgrade of the cooling circuits planned (currently using town water).
NSG TPU renovation foreseen.
Systems working very reliable since LS1 (some Thyratron changes to be expected during upcoming run).
06/07/2015
MTE Internal Review

25. RSG (ERD-2 / DFA-254) DCPS & Controls renovation done in LS1.
Renovation of switch tanks ongoing (2 of 3 done, 3rd one planned to be exchanged during YETS).
Exchange of “Diala” mineral oil against “Midel” synthetic oil.
06/07/2015
MTE Internal Review

26. Cost & Resources Summary
Cost Center
Cost [kCHF] HR
[PY]
CT-FPS yearly operations budget 30
0.2
CT-EC yearly operations budget 40
Σ(ops./yr) 70
0.4
Σ(ops. until LS2)
210
1.6
Cable replacement
1 085 1
Bld. 359 floor renovation
500
0.5
PG/NSG TPU renewal 50
Oil exchange 25 -
Cooling circuit improvements 15
SEH-31 20
0.15
Σ(proj.)
1 695
2.35
Σ(total until LS2)
1 905
3.95
Estimates for operations until LS2.
Presently not allocated to CT.
06/07/2015
MTE Internal Review

27. Conclusions (I) CT reliably running.
Urgent decision needed concerning the future of SEH-31.
Building: Floor renovation necessary.
Costly cable replacement necessary.
Other smaller renovations still ongoing or planned.
All kicker systems are prepared and ready for the upcoming LHC physics run.
Extended exploitation will require to allocate additional resources.
06/07/2015
MTE Internal Review

28. For any decision: don’t forget PS-CT and FAK are reliably in operation since the (early) 70s and need increasing attention to keep on going with the excellent performance seen over the past periods.
Thanks for your attention! And thanks to everyone contributing to the successful CT renovation and current operations!
06/07/2015
MTE Internal Review