v. kain, g.h. hemelsoet ab/op1nov 08, 2007 lhc injection system v.kain, g.h. hemelsoet, ab/op input...

1V. Kain, G.H. Hemelsoet AB/OPNov 08, 2007

LHC Injection System

LHC Injection System

V.Kain, G.H. Hemelsoet, AB/OP

Input from: E. Carlier, B. Goddard, J. Wenninger

• What do we need to inject?• Interfaces• Testing


What do we need to inject? (1)

• Last 200 m of transfer line

• Injection Septum MSI (5 magnets, MSIB and MSIA, one power converter)

• Injection kicker MKI (4 magnets, 54 kV)

• Injection stopper TDI

• Mask TCDD

• (Auxiliary collimators TCLIA and TCLIB)

Transfer line

MSI

Q5 Q4 D2MKI

IP2

kicks in the vertical plane

TDI

TCDD

TCLIA+

TCLIB


What do we need to inject? (2)

Transfer line

MSI

Q5 Q4 D2MKI

IP2TDI

TCDD

TCLIA+

TCLIB

• BI in the LHC

– BTVs – application: Fabio

• For point 2: BTVSS.6L2.B1, BTVSI.C5L2.B1, BTVSI.A5L2.B1, BTVST.A4L2

– BLMs (relevant for injection tuning) – partly SPS timing, partly LHC timing

– Injection acquisition for LHC BLMs: application?– 5 LHC BLMs on the MSI AND 5 SPS BLMs on the MSI (the last TI2 and TI8 ones)

– 3 LHC BLMs on the TDI

– no BLM on TCDD, but at entrance of D1

– (BLMs for TCLIA/TCLIB)

– (no mention of LHC BPMs, nothing special for injection region)


Interfaces (1)

• Interlocking

– Supervision application for East and West Extraction in SPS will be updated to include injection BICs

– MKI needs injection

permit to pulse remotely

• ALICE ZDC unmaskable

• LHC beam permit

unmaskable

– Masking needs LHC Safe

Beam Flag (SLP, timing)

– Master BIC will be updated

using the ‘real’ logic (next year)

• SMP generator box for:

– Beam presence

– LHC SB

– SPS probe flag

– SPS SB Injection BIC still missing


Interfaces (2)

• RF – pre-pulse

– optical fiber link to point 4

• LBDS – abort gap watch dog

– direct fiber link with point 6

– OASIS:

• injection permit

• BETS window

• watch dog window (AGK)

• PFN voltage

• circulating intensity

• like to have this as a fixed display

• Timing

– “Next Injection Ring” event

– Injection warning (1000 ms before injection)

– SLP energy for BETS

SPS example, no AGK


Transfer lines• Power converters:

– Power converters including MSI: SPS MUGEFs• hardware commissioned (heat run,…)

• settings available – SPS timing – SPS cycle

• interlocking via transfer line BICs (ROCS surveillance)

• BI:– All applications ready

– All equipment already defined for• logging (DB and SDDS)

• fixed displays

• dedicated applications (BTVs, BLMs, BTCs, YASP)– still missing: critical settings for BLMs

• TCDIs:– Only three collimators in TI 2 hardware commissioned

– Not connected to BICs yet

– (Two partly beam commissioned• setting up methods still to be worked on)

– Application available • critical settings do not exist yet


MKI

• Interlock to ring BIC

– Local/remote

– SIS: temperatures

• Interlock to injection BIC

– State

• Settings: LSA settings and critical settings

– LhcMKIstate

• standby, on, off

– LhcMKIkick

• delay, length, strength (57 kV), enable/disable

• windows: critical settings

• Application in progress (Georges-Henry)

• BETS like MKE in SPS

– uses SLP energy

• Logging still needs to be discussed

• Alarms still to be defined for OP


TDI/TCDD - collimators• Needs LSA settings and critical settings via collimator control

• User permit to Injection BIC– TDI needs to be in “protect” during injection

• User permit to Ring BIC, beam specific– TDI needs to be out after injection

• TCDD in IR2 moveable (in/out)– User permit to Injection BIC → needs to be closed during injection

– Alarms → needs to be open otherwise

• Controls: collimator control

• TCLIA/TCLIB → collimators, Stefano, interlocking like TDI

TDIringBIC: TDIpos > TDIringBIC

TDIinjBIC: TDIpos < TDIinjBIC

MKI standby: t0


Other stuff• Knobs for polarity changes of experimental magnets, separation on/off, crossing on/off:

– experimental magnet, correctors, compensators, MKI

• Orthogonal steering at MSI → YASP

• Injection steering:– MKI part of it?

– define LSA parameter angle for MKI → kV

• Injection triggered acquisition!!!! Need to be able to correlate beam loss to injection event– Nothing foreseen for the BLMs

– Only 1 Hz data publishing

– → BLMs on TDI: LHC BLMs!!!

• “Injection” logging?– to be defined

– ‘SDA’ – XPOC like?

• Fixed displays– to be defined

• (Injection quality check → SIS) – not an issue for start-up


Testing…dry (1)• Full testing of injection equipment requires:

– Timing

– LHC cycling

– SLP energy distributed and generated by the LBDS BETS

– LHC beam permit – closed loop (LBDS armed → LHC closed!!), closing locally?

– Alice ZDC giving green light (for point 2)

– LHC Safe Beam Flag distributed • TDI, TCLIs, TCDIs masked

– Functions defined for TDI (TCLIA/TCLIB as well)

– TCDD controlled within collimator control system

– Cooling (TDI, TCDD, …)

– Logging defined

– Sequencer: injection sequence, timing tables prepared

– RF pre-pulse (simulation mode?)

– LBDS synchronisation commissioned → abort gap watchdog

• Full testing of injection interlocking requires:– Interlock functions defined for TDI (TCLIA/TCLIB)

– Interlock functions defined for TCDIs

– TL pulsing – MSI FMCM, MSI PC sum fault

– Real Master BIC to verify injection permit result• LHC-SPS flag distribution


Testing…dry (2)

• Scenario: interleaved injections:

– Sequencer – injection sequencing

– “Next Injection Ring” event used by MKIs to condition which one to pulse

– ONE injection warning event: injection warning for charging PFNs

– Pre-pulse for pulse

• Scenario: injection – the whole chain: injector chain → first turns in the LHC:

– Sequencer – injection sequencing

– Mini-conditioning of MKIs??

• Uncoupled injection timing, simulated pre-pulse?

– Timing table with all events

– BI stuff as well: BLMs!!!???

– Injection logging


Testing…dry (3)

• Scenario: inject & dump:

– Sequencer…

– Together with LBDS

– Dump on first turn

• Scenario: injection finished – prepare for ramp:

– Downstream TEDs in

– MKI disabled

– MKI standby! (before moving TDI)

– Move out TDI → state transition: injection permit, no state transition: beam permit

– Move out TCLIA/TCLIB → like TDI

– Move out TCDD in IR2

• …


Summary

• Lots of stuff already there

– Equipment partly already hardware commissioned

– Applications

• either just need to be configured for the LHC

• or are under way

• Logging and alarms still need some work

• Triggered acquisition for BLMs during injection?

• Testing needs to be worked out carefully

– Parallelism

– Lots of details to be defined

v. kain, g.h. hemelsoet ab/op1nov 08, 2007 lhc injection system v.kain, g.h. hemelsoet, ab/op input...

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