Status of the AD ADUC 13/6/2012T. Eriksson CERN BE/OP

Status of the AD

ADUC 13/6/2012 T. Eriksson CERN BE/OP

AD startup 2012• Closure/search of ring and target area 16/3• Cancel OP8 and OP9 procedures• Power up all necessary converters for:• DSO-tests• 2 weeks of HW-tests/cold checkout (20/3 – 30/3):

– Many interventions were made during the shutdown:• Vacuum leak repairs in s48 (ring) and FTA-line• Ejection septum leak: left as is with water circuit closed and pumped• Water leak repair on main Quad s47• E-cooler cathode replacement => bakeout of sector• Injection line pulsed elements converter renovation & 4 new units (new design)• New converter for DE.DHZ7042 dipole• Modification of ring orbit corrector converters• GEM detector installation completed – all ejection lines now have GEM:s installed• Many tests, manipulations and repairs in target area in view of consolidation• New cabling for improved ring converter diagnostics (NAOS)• Visitor itinerary through AD ring

– => It was a busy period !ADUC 13/6/2012 T. Eriksson CERN BE/OP

AD startup 2012• Startup with beam 31/3 – 26/4

– Debug injection, beam cooling, deceleration etc.– Optimize beam emittances, deceleration and beam parameters at ejection energy.– Verify ring parameters (tunes, orbits, chromaticity etc.)– Set-up and optimize ejection lines– Studies (depending on time available):

• Injection line (dogleg): MTV:s can now be used thanks to improved CCD-cameras• Minimize transverse tails at 100 Mev/c• GEM tests at 100 and 500 MeV/c• Optics studies in 7000-line (ELENA matching issue)• ASAUSA line optics improvement – RFQD matching• New pulsed converters stability (ELENA/AD/PS complex synchronization)• (AD cycle programming: verification of some features in view of ELENA)• (Orbit pickup sensitivity; dependence on beam intensity)• (Tests for future tune measurement system)• (Tests of new stochastic cooling parameter control)• (Dispersive optics at 100MeV/c vs. cooling performance)• (Minimize losses at 3.5 GeV/c)

• Physics started as planned 27/4 (=> Not all experiments ready at this time)• 31 weeks of physics in 2012 plannedADUC 13/6/2012 T. Eriksson CERN BE/OP

AD cycle/performance

ADUC 13/6/2012

- Good efficiencies established relatively fast- Some (initial) problems with unstable trajectories at 100MeV/c

T. Eriksson CERN BE/OP

Beam parameters at 100 MeV/c

- Longitudinal emittances: ejected bunch length was 100 ns at startup, growing to 170ns later.- Previous years we started at 160ns which increased to 250ns during the summer-8/6/2012 transverse profiles: little or no sign of tails or halos. 80% of the beam is within 0.5 – 0.8 pi.mm.mrad


Ejection line optics

Studies on ejection line optics mismatch (md):– Kick response measurements show incoherencies– Improved TV-cameras for MTV 7001/7045: can now be used for pbars– New GEM-detectors better suited for optics validation– BHZ8000 (not used today): shielding against remanent fields installed– Important for ASACUSA RFQD matching + ELENA transfer line design– Common part is validated up to DE0.GEM42 after shielding of

BHZ8000 and including DE0.BHZ fringe fields in calculations– Will continue…..


ASACUSA beamline


- Some studies done to recover good trapping efficiency (1.5E6)- Some discrepancies downstream of DE0.GEM42- With larger than normal beam, vertical divergence is observed between

the ASACUSA watchdogs- Slight improvement with DE1.BHZ10 fringe field included in MAD. Not yet

operational since other discrepancies should be found first.- Trapping rate very sensitive to beam emittances- 0.8E6 trapped presently- Needs more studies

AEGIS beamline

- Improvement after including dipole gaps in MAD.- Tuning vs. trapping rate- 3D model also tested but no real improvement


ALPHA beamline

- Focal point moved- Dipole gaps now included in MAD- 3D modelling to be done


ATRAP1 beamline

- ATRAP1 zone verified- Beam profiles ok on last monitor but very large upstream - Losses due to scraping?- New optics upstream of

GEM42 yet to be included


AD consolidation

ADUC 13/6/2012

– A limited program was approved in 2009 in view of continued AD operation until 2016

– Only main items with high RS and long leadtime to be done

– Breakdowns will be treated with emergency measures

– With ELENA, “2016 closedown” now looks more like “>2030”

Item Group RSRS

after

SManpo

werSM M10 M11 M12

MY kSfr kSfr kSfr kSfrAD Magnets TE-MSC 15 6 <2.4 (*) 325 125 200

AD power converters TE-EPC 10 3 <4.3 (*) 650 350 300AD controls BE-CO N.A N.A 0 0 0 0

AD vacuum ion pumps TE-VSC 9 6 0.8 90 45 25 20AD vacuum ion pump

power supplies&controls TE-VSC 8 2 0.4 350 50 150 150AD Stochastic cooling

p/u&kicker movement BE-RF 9 2 1 50 50AD Stochastic cooling

electronics BE-RF 6..9 2 0.5 100 50 50AD C02 system BE-RF 8 3 1 160 80 80AD target area

ventilation & interlocks EN-STI 8 3 1 100 20 80AD target water cooling +

ctrls EN-STI 6 4 0.1 50 50AD kicker oil system TE-ABT 8 3 0.75 60 30 30

AD kicker power supply/controls

upgrade TE-ABT 4 2 0.25 125 65 60AD ejection line power

converters TE-EPC 4 2 0.25 90 90AD C10 system BE-RF 4 2 0.2 80 80

AD power converter spares TE-EPC 15 3 0.25 50 50sum 2280 805 1045 430

T. Eriksson CERN BE/OP

Magnets, ring and transfer lines

• Completed:– Ring main B partially re-shimmed (after coil movement measurements)– Ring (B+Q) water hoses/filters renewal– DR.QFC54: spare coil located

• Ongoing:– Ring BHN spare coils: order placed, delivery 2013 (to complete spare parts inventory)

N.B: missing spare coils for the other main magnets were located after the consolidation plan was finalized. => budget requirements reduced

– Orbit correctors 2904/2917: New design, order placed, delivery 03/2012

• To be added in view of prolonged AD lifespan:– Overhaul of ring main bending and quad magnets: removal/disassembly of one unit for

assessment?, re-shimming?, build complete spare unit?– 7020/7030 quads: new magnets, redesign? (no spares available)


Power converters

• Completed:– DR.Q-TRIM1 upgrade, in operation– DR.Q-TRIM3 upgrade to be commissioned 03/2012– E-cooler correction dipoles renewal, in operation– Dogleg pulsed converters: renewal of capacitors– Dogleg pulsed converters: 4 new converters operational as of 2012

• Ongoing:– DR.Q-TRIM2,4 and 5 upgrade in LS1– Main B/Q + BTI247 magnetic component spares: delivery in 2012

• To be added in view of prolonged AD lifespan:– Study soon to be published by TE/EPC (tech + budget requests)

• Other:– Ejection line consolidation abandoned due to new e-static ELENA lines– Stochastic cooling main converters will be rebuilt by BE/RF


Beam cooling, stochastic

• Completed:• Ongoing:

– Electronics for system parameter control: replacement of obsolete equipment/controls interface with PLC-based system. To be commissioned 03/2012

– u-wave amplifier power supplies: replace existing large units with 48 individual supplies + renewed PLC-based controls. Call for tender & purchase in 2012

N.B. support will change from TE/EPC to BE/RF– Pickup/kicker movement: Update of obsolete system with modern digital servo motor

controller. To be done during LS1

• To be added in view of prolonged AD lifespan:– Renewal of u-wave amplifiers: needs evaluation, cost ~ 2 MCHF– p/u & kicker vacuum tanks: returned from GSI in 2012 => To be used for tests of new p/u

& kicker movement system components. Can we also use these as spares ?


Beam cooling, electron

• Completed:– HV-supply: Renewal of Faraday cage, HT transformer, converters, interlock system,

safety, electronics/controls interface: operational since 2010

• Ongoing:• To be added in view of prolonged AD lifespan:

– Build a completely new modern cooler ~ 2.5 MCHF– Existing cooler:

• Is >30 years old• We have no spare magnets; very long down time if failure, significant cost for new

spares• Performance issues (?)• e- bpm:s not operational• Contains unused equipment


RF

• Completed:– C10: renewal of bias power supply and final tube filament heater, procurement of spares

for filament transformer

• Ongoing:– C10: renewal of 1kW drivers. 2 units are delivered to CERN. 1 unit is operational and

under evaluation/improvements due to initial problems– C02 tuning system and HT-supply renewal: to be started (lack of manpower). Equipment

needs to be displaced for ELENA – has to be done in LS1

• To be added in view of prolonged AD lifespan:– C10 final stage tubes: tests of existing spare units during LS1. Do we have enough good

spares ? If not, new systems need to be constructed. Cost unknown, but > 1 MCHF– C10 electronics/controls renewal– C10 low-level upgrade (?)– Beam control: migration to standard DSP-based system.


Beam transfer

• Completed:– Kicker Oil system consolidation (?)– Magnetic Horn:

• Electronics/controls interface/interlock system renewed (PLC-based) - operational• Trigger generation system consolidated – operational• Spare units for capacitor charger re-activated (but still 25 years old)


– Kicker Vacuum tanks: Structural improvements (vacuum leaks) – to be defined– Kicker Electronics/controls renewal: included in the ELENA planning since the platform

needs to be displaced– Magnetic Horn: replace Mercury ignitrons with solid state switches, renew capacitor

chargers, build new test stand (B174 dismantled)


Vacuum

• Completed:– NEG pump improvement in electron cooler: operational– Pressure gauge power supplies/controls: New system installed in 2012

• Ongoing:– Ion pump power supplies/controls: planning to be revised

• To be added in view of prolonged AD lifespan:– As proposed by TE/VSC:

• Cryo system renovation• bakeout system upgrade• general controls upgrade• Ion pump HV feedthrough improvement (heating system)


Instrumentation

• Completed:– Renewal of control room signal analyzers– Replacement of all ejection line MWPC:s by GEM-detectors.– Upgrade of MTV:s to CCD-cameras. Works well with low-intensity beams.


– Schottky analysis (longitudinal): integrate ageing DSP equipment into new LL beam control system

– Orbit system: renewal => study new solutions e.g. individual ADC:s– BBQ-tune measurement => study new solutions– BCT (TFA6006 and 5302) renewal: mechanical redesign– BCT (all) electronics/software update– DCCT (TRA4207) electronics– Other; SQUID studies etc.


Target area

• Completed:• Ongoing:

– Knowledge transfer– Study aimed at identifying consolidation needs. Many interventions and manipulations

were done this shutdown.

• To be added in view of prolonged AD lifespan:– Many many items !


Other

• Experimental area (see F.Butin’s talk)• Infrastructure• Controls


Documents

Status of the AD ADUC 13/6/2012T. Eriksson CERN BE/OP