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

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

ASACUSA beamline ADUC 13/6/2012T. Eriksson CERN BE/OP -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 ADUC 13/6/2012T. Eriksson CERN BE/OP

ALPHA beamline -Focal point moved -Dipole gaps now included in MAD -3D modelling to be done ADUC 13/6/2012T. Eriksson CERN BE/OP

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

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” ItemGroupRS RS after  Manpo wer MMM10M11M12 MYkSfr AD MagnetsTE-MSC156<2.4 (*) AD power convertersTE-EPC103<4.3 (*) AD controlsBE-CON.A 0000 AD vacuum ion pumpsTE-VSC AD vacuum ion pump power supplies&controlsTE-VSC AD Stochastic cooling p/u&kicker movementBE-RF92150 AD Stochastic cooling electronicsBE-RF AD C02 systemBE-RF AD target area ventilation & interlocksEN-STI AD target water cooling + ctrlsEN-STI AD kicker oil systemTE-ABT AD kicker power supply/controls upgradeTE-ABT AD ejection line power convertersTE-EPC AD C10 systemBE-RF AD power converter sparesTE-EPC sum 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) ADUC 13/6/2012T. Eriksson CERN BE/OP

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

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

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

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

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) Ongoing: To be added in view of prolonged AD lifespan: –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) ADUC 13/6/2012T. Eriksson CERN BE/OP

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

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. Ongoing: To be added in view of prolonged AD lifespan: –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. ADUC 13/6/2012T. Eriksson CERN BE/OP

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

Other Experimental area (see F.Butin’s talk) Infrastructure Controls ADUC 13/6/2012T. Eriksson CERN BE/OP