LMC 27 November 2013 Status of LBDS LS1 activities and plans for 2014 reliability run Jan Uythoven for the many, many people working on the mentioned equipment

LMC 27 November 2013

Status of LBDS LS1 activities and plans for 2014 reliability run

Jan Uythoven for the many, many people working on the mentioned equipment

2Jan Uythoven, Status LBDS LS1 & plans

New TCDQ absorber Protects the machine in case of asynchronous dump Upgraded version robust to 2.5×1011 p+/b @ 25 ns The cross section of the upgraded TCDQ is identical to the present

system. The graphite absorber is being replaced by a sandwich of graphite and carbon reinforced carbon fibre (CfC)

New VMTAB bellows to allow large movement (TE/VSC) Production started

LMC, 27/11/2013

Old sandwich vs. new sandwich

M. Atanasov, J. Borburgh


New TCDQ and related All 6 tanks are installed and aligned Modification of measurement tables ongoing (01/2014) Spare tank will be finished by the end of 2014 Related to asynch dump protection

The new TCDQ position will be interlocked by the BETS (N.Voumard) New BPMS electronics (T. Lefevre, C. Boccard) Installation of TCSGP – jaw BPMs (S.Redaelli & project)

LMC, 27/11/2013

4

Abort Gap Cleaning Automatic procedures of

the BSRA to make the system more reliable To be launched

automatically by sequencer or ‘internal timer’ when in physics

Aim is to automatically start the abort gap cleaning or dump the beam, without intervention of the operator

Re-assessed quench levels of Q4 and Q5 with new TCDQ

Improvements cleaning by the ADT New cables and hardware New cleaning algorithms

being studied

LMC, 27/11/2013 Jan Uythoven, Status LBDS LS1 & plans

See MPP 25/10/2013

S. Mazzoni, E.Bravin, S.Bart-Pederson

W. Hofle, D.Valuch, E. Gianfelice-Wendt

5

Direct link BIS – LBDS re-triggering


BIS CIBM

BIS CIBM

BIS CIBG

Loop A

Loop B

Cour

tesy

E. C

arlie

r, S.

Gab

orui

n

BIS CIBDSRTB

Use

r pe

rmit

(B1

conf

ig)

200us

250us

Presented MPP 19/07/2013

S.Gabourin, R.Denz, E.Carlier, N.Magnin, M.Zerlauth, D.Wollmann, A.Apollonio

Asynchronous trigger


Direct link BIS – LBDS re-triggering

False Asynchronous beam dumps Specified: 2 in 10 years Calculated: 0.025 in 10 years

False Synchronous beam dumps Specified: 2 per year Calculated: 0.011 per year

Status Ordering components VHDL test bench ‘now’ Series of 5 boards to be

launched December Install machine March 2014

LMC, 27/11/2013

V. Vatansver

S. Gabourin

7

Dilution kickers MKB Installation of the nominal system (staged to spread costs) Add two MKB magnets per beam = 1 tank: 4 H + 6 V magnets


V.Senaj, L.Ducimetière

8

Extraction kicker MKD - Generator

During LS1 operational energy was limited to 5 TeV Installation of HV insulators between GTO switches HV

deflectors and return current rods


V.Senaj, L.Ducimetière


Add shielding to MKD & MKB cable ducts

Additional shielding between UA and RA for MKD and MKB systems

LMC, 27/11/2013

V.Senaj


Extraction kicker MKD Power Trigger Unit

Increase PTU maximum voltage from 3 kV to 4 kV (replacement of HVPS)

Replace 1.2 kV IGBT with equivalent 1.7 kV type=> better resistance to SEB

Operate PTU at ~3500 V constant voltage,=> Increase GTO gate current=> Increase GTO lifetime=> Reduce kicker rise time=> Stabilise pulse delay over energy range

LMC, 27/11/2013

V.Senaj, M. Stjepic, E.Carlier

11

LBDS Controls

Upgrade of Trigger Synchronisation Units cards (TSU) Distribute TSU over three different crates Motivation

External review of TSU v2 cards (2010) Internal review of LBDS Powering (2012) VME crate +12V problem (2012) CIBU powering filters problems (2011) Improvement of surveillance & diagnosis


A. Patsouli, A. Antoine, N. Voumard

12

LBDS Powering Modifications

• Third UPS (backup) added everywhere• Added a separated connection to a second UPS (US65) for LBDS• Individual circuit breaker for each crate PSU• Software monitoring of crate redundant PSU• The aim is to improve safety

Jan Uythoven, Status LBDS LS1 & plansLMC, 27/11/2013

Tests to take place at end of AUG tests

Prefer to test before starting run with local BIS loop -> end of May

Test option with F3 and F4 off simultaneously

V.Chareyre, H.Thiesen, I.Romera, M.Zerlauth

E.Carlier, N.Magnin, A.Antoine

Split in three crates


MKB Vacuum

Number of ‘false beam dumps’ due to LBDS in 2010 – 2012

Too many dumps triggered by MKB vacuum, without having a real vacuum problem

Problems with noisy vacuum signals

LMC, 27/11/2013


MKB Vacuum

MKB vacuum gauges being replaced Problems with regular vacuum spikes (every 7 / 9 minutes) being

investigated in detail Installation of test gauge outside beam vacuum Effect not visible outside the vacuum chamber Seems to be real and not a controls issue inside the chamber Source to be identified at start-up

ABT prefers to maintain present 2 oo 3 interlock logic per individual MKB tank

LMC, 27/11/2013

Not only this

device !

F. Antoniotti, JP. Boivin, P. Gomes


LBDS Reliability Runs Local Reliability Run

12 weeks, system in local Test the voltage holding of generators and magnets, erratic switching

(without radiation), switch surveillance, cooling, stability, energy scans Remote Reliability Run

6 weeks, system in Remote Run sequencer for arming, local BIS loop and BETS-SIM Including energy ramps etc. Test new link between BIS – LBDS: get statistics Test operational software and diagnostics, XPOC etc.

Risks to be a moving target with developments of FESA3, CMW etc.

Followed by regular running until first beams Tests with beam (2015)

Standard commissioning tests with beam Effective rise time measurement of the MKD (never done) Test dump with BLMDD (never done)

LMC, 27/11/2013


Commissioning / Reliability Runs / Dry runs

LMC, 27/11/2013

Nov – Dec 2013 Commissioning individual MKDs and MKBs

Local (ABT)

06/01/2014– 14/02/2014 System tests LBDS Beam 1 and Beam 2

Local (ABT)

17/02/2014- 09/05/2014 Reliability run Local (ABT)March 2014 Install new BIS – LBDS link (MPE) March – April 1/day week Tests from CCC, parallel to

reliability runRemote 1 day/week (OP)

12/05/2014 – 23/05/2014 Install new TSU on LBDS & tests in local and from CCC

(MPE / ABT / OP)

26/05/2014 – 04/07/2014 Reliability run in remote, local BIS loop and BETSIM. From CCC. UPS tests.

Remote

07/07/2014 Weekly testing during dry runs / check on FESA(3) updates and added functionalities

Remote

Date to be determined by OP

Remove local BIS and BETSIM, start testing machine wide and close BIS loop. Weekly testing.

Remote

End 2014 (OP) BIS loop closed, inject and dump under real machine conditions

Remote

Safety OK

before summer

Keep system

working / software


Conclusions

Many important changes to the LHC Beam Dumping System and related equipment To allow for higher beam energies and intensities To improve safety To increase availability

Extensive testing is required to guarantee safety Reliability run in local, 12 weeks: generators and magnets Reliability run in remote, 6 weeks: BIS-LBDS, TSU To be finished before the summer holidays: back to bussiness Tests with beam at start-up

Running in remote involves many equipment groups and requires coordination by the OP group

LMC, 27/11/2013

Documents

LMC 27 November 2013 Status of LBDS LS1 activities and plans for 2014 reliability run Jan Uythoven for the many, many people working on the mentioned equipment