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SL Annual Divisional Meeting

SL Annual Divisional Meeting. Steve Myers SL, CERN. Steve Machines: SPS and LEP Projects SLI, CNGS, LEPdismanteling, LHCCP, LTI LHC work in the Division -------------------------------------- MOAS for Enrico and me; divisional memo sent Mar 2000 Five Year Review and new career structure.

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SL Annual Divisional Meeting

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  1. SL Annual Divisional Meeting Steve Myers SL, CERN

  2. Steve Machines: SPS and LEP Projects SLI, CNGS, LEPdismanteling, LHCCP, LTI LHC work in the Division -------------------------------------- MOAS for Enrico and me; divisional memo sent Mar 2000 Five Year Review and new career structure Enrico R&D and international collaborations Task force on outsourcing Succession planning and recruitment training and visits Pensions and Investment Committee Career path changes and TEACC The Terrible Twosome! Questions

  3. Technical Topics • Year 2000/2001; Machines • SPS • LEP • Projects • LHC CP • SLI • CNGS • LEP dismantling • LTI • LHC Project Work in SL Groups • AP, BI, BT, CO, CT, HRF, MR, MS, OP, PO.

  4. Machines SPS Protons

  5. Machines SPS lead ions

  6. MachinesSPS Lead Ions

  7. Machines LEP Luminosity per day

  8. Machines LEP Luminosity production LEPC September 5th “Expected luminosity > 103GeV ~ 136 pb-1 by November 2nd” LEPC LEPC Ready , Steady , Go Steady , Go Go

  9. Delivered luminosities vs Energy

  10. Integrated luminosity • A busy time in 2000: • 220 days of running • 1400 physics fills • average turnround < 1h • > 130 pb-1 above 103GeV/c • (100 pb-1 in last 110 days) • > 230 pb-1 altogether • comparable to 1998, 1999

  11. Possible RF improvements Extra module 50 MV remove ZL left of 8 no more bunch trains for Z will take longer - do less ? 3 klystrons powered by 1 HV Fix dead & dying cavities 40 MV Maximum gain of 90 MV given a sufficiently long shutdown (5 mon) Allows to operate at 104.1GeV/c with a margin of 1 klystron Have seen other problems instrumentation collimators stoppers insulators water hoses tunnel movements in 1 and 5 Nothing serious enough to stop the run & don’t expect much worse May need precautions for civil engineering during 2001 run Running in 2001 ? Sync Radiation

  12. Running in 2001 ? Given above RF voltage, and based on the experience in the second half of 2000, could produce 1.1 pb-1 per day at 104.1 GeV/c As in previous years, we will have to deal with • Breakdowns • Z running • Energy calibration runs • Cryo de-icing • SPS MD sessions • Need a full 6 month run to deliver the goods at 104.1 GeV/c • We’re up for it Minimize and parallelize 30 days ?

  13. LHC DivisionSC MagnetsInsertionsCryogenicsVacuumMachine IntegrationIndustrial Controls S L DivisionAccelerator PhysicsTransfers Inj.and DumpsInstrumentationPower ConvertersRadiofrequencyControls InfrastructureSPS UpgradeElectromagnets LHC Project Leader LHC Project Management Structure SPS LHC & LEP2 + SPS+ LEP2

  14. PROJECTS LHC-CP...... Operational Challenges • Super-conducting magnets • multipoles, snap-back, persistent currents, key beam parameters affected. • high energy,high intensity beams, extremely low tolerance to beam loss, quench protection collimation mandatory at all times • Machine design • 2 rings, 8 sectors, bits of the ring in common, cross-talk between the rings, small mechanical aperture, large energy swing  large range in magnets and power converters. • Beam dynamics • Wide range of optics Beta* 18 m to 0.5 m • Dynamic aperture, crossing angle, beam-beam effects • Intra-beam scattering, synchrotron radiation, image currents, intra-beam scattering, instabilities, electron cloud, PACMAN bunches, ghost bunches. • Coupling, dispersion, beta beating … very tight orbit tolerances - stability for collimation… Tight tolerances on main beam parameters, E, Q, Q’

  15. PROJECTS LHC-CP...Closed Orbit LEP Orbit..Maximum sampling frequency 0.067 Hz LHC Orbit.. Proposed sampling frequency 10 Hz

  16. Main Modifications to the SPS for LHC with planned completion dates Surface buildings Modifications to all BA’s - especially BA1, BA3, BA4, BA6 & BA7 2000-2001 Impedance Reduction Installation of vacuum pumping port shields: 1999-2000 : LSS2,3 & 4 (partial): 150 2000-2001 : rest : 800 RF 200 MHz TWC Power amp. upgrade 2000 Cavity modifications 2001 HOM coupler upgrade 2000 New electronics ‘98-2001 Transverse Damper Continuous upgrade programmore power and higher bandwidth: 1998-2001 Magnetic Septa LSS2 & LSS6 Impedance reduction by shielding 1998-2000 ECA4 Access bunker construction 1998 TT40 connection 2000 Remove Cryogenics plant 2001 Platform construction 2001 Beam Dump Upgrade of core 1999-2000 LSS4 Re-cabling ’98-’99 Civil Engineering ’99-’01 Remove Lepton RF 2001 Install extraction 2001 Install TT40 2001 Injection Kickers Now 4 more magnets (1 extra tank) + new PFN 2000-2001 LSS5 Move BI here in 2000 Eventually install 400 MHz SC RF system (optional >2001) LSS6 Remove lepton extraction equipment and disconnect TI12/TI18: 2001 TCC6 Displace T1 & move TT61 2000 Disconnect TT70 & TI2 breakthrough 2001 TT2/TT10 Additional Beam Instrumentation 2000-2001

  17. PROJECTS CNGS

  18. CNGS schedule / status

  19. SL activities for CNGS Proton beam TT41 (BI, BT, CO, DS, MS, (incl. modification of SPS extraction) MR, OP, PO,...) Target station T40 (BT) Layout target chamber (EA) Hadron stop (EA) Muon detector stations (BI, EA) Secondary beam controls (CO, EA) --- SPS upgrade (HRF, OP, …)

  20. PROJECTS LEP Dismantling The project is centred in the MR Group Activities • general coordination (Comité Executif du Démantèlement) • implementation and operation of the traceability system • safety training • infrastructure management • interaction with the French authorities concerning INB activities

  21. Project LEP Dismantling • Concerned with removing equipment from the LEP horizontal underground areas (~30’000 tonnes) • there are four separate projects for the experiments • About 400 people are expected to be involved in the execution of this project over its 16 month life • ~1500 people have attended the training courses ? • Traceability and radiation controls are in place. • Finally started - we received the approval of the French authorities on 2nd November

  22. PROJECT LTI...TI2/TI8 • combined length 5.6 km • over 700 room-temperature magnets (74 recup’d) = excavated TI 8 ~ mid 2004 SPS LHC TI 2 ~ mid 2006

  23. PROJECT LTI...TI8 Civil Engineering TI 8 civil engineering formwork for lining 14. 9. 00 tunnel boring machine leaves 4. 9. 00

  24. LTI...LHC Transfer Line Dump LHC transfer line dumps (TED) (core prototype) Graphite and aluminium in a copper enclosure (4.3 m * 0.31 m), to be surrounded by a cast iron shielding (total weight ~ 22 t)

  25. LTI...LHC Injection Kickers (PFN prototype) LHC injection kickers (PFN prototype) series construction underway at TRIUMF / Vancouver

  26. GROUPS Accelerator Physics • Beam Optics, dynamics, and performance • Parameter Optimisation • Beam measurements and correction strategies • mini teams with BI and OP • Dynamic Aperture • Magnetic field quality: beam losses • predictions et maximisation • Instabilities • impedance budget, beam stability • electron cloud: measurements, theory and simulation. Different bunch patterns • Beam-beam effects

  27. GROUPS Beam Instrumentation • BPM (position of beam around the circumference) • Emittance Measurement (beam profiles) • Beam Losses, localisation • Betatron Coupling • Instrumentation in the transfer lines • Schottky scans • Luminosity Measurement • Tune measurement • Chromaticity measurement • ........

  28. Hardware Set-up for Head-Tail Chromaticity Measurements using Chirp Excitation at HERA-p

  29. Turn by Turn Chromaticity for Three Different Head-Tail Separations [70GeV - Horizontal Chromaticity = +4].

  30. GROUPS Beam Transfer • Two transfer lines from SPS to LHC • Injection Systems • Beam Dump System • 540 MJ per beam • 200 times the energy of an SPS beam • equivalent to 135kg TNT • équivalent à 35 kg Birchermuesli • problem: energy density

  31. BT • Insert BT slides of • schema of the beam dump and • a table of the number of different kickers.

  32. GROUPS Controls • Most of work done inside LHC official working groups • RADW for testing of the radiation resistance of electronics • TEWG defines equipment to be located in the tunnel • TIMWG : all timing aspects • LHC-CP defines LHC controls infra-structure • FFEWG defines LHC front end architecture • CIWG communications infrastructure • Middleware project; define and implement communication layers • SPS2001 project • HELIX project: define and implement file and application servers for LHC controls infrastructure

  33. GROUPS Cavity Technology 200MhzSystem Cavities: • 4 per beam, 1MV max, 750kV in operation •Power source: • 4 tetrode amplifiers, 60kW CW, 90kW peak, • Amplifiers and pre-amplifiers in klystron gallery,

  34. GROUPS Cavity Technology 400Mz SC cavities Two SC cavities, mounted in their He tanks (Final cryomodules will each contain 4 cavities)cern photo AC-9809004-01

  35. GROUPS HRF • 200MHz acceleration system • 400 MHz acceleration system • one system per beam • single cell sc cavities • couplers (300kW) • klystrons (500kW) • Beam Feedback Systems • longitudinal • transversal (kickers in collaboration with Dubna) • Modifications pour SPS

  36. Transverse damping system Design: Collaboration CERN/JINR (Dubna, Russia) JINR should supply kickers and power amplifiers Deflector parameters • 4 electrostatic deflectors (2 parallel plates per deflector) per plane and per beam • Max. voltage between plates  7.5kV • Length ~1.5m, distance between plates 52mm Power Source • 2 tetrode amplifiers underneath each kicker. (tetrodes 16A, can give 10kV, low frequency) • Power bandwidth 1MHz, full bandwidth 20MHz 2 coupler type pick-ups (230mm long) per ring and per plane dedicated to the damper

  37. GROUPS MR LHC Activities • Installation (MR-ID) • preparations (transport WG etc.) and coordination • Site infrastructure management (MR-LS) • new buildings etc. • Databases (MR_DBS) • support and consultancy to LHC-CP • Preparations for LHC as an INB • zonage • traceability

  38. GROUPS MS • Magnets for Transfer Lines SPS --LHC • 360 dipoles + 180 quadrupoles (Novosibirsk) • Injection Septa • steel setpum magnets (Protvino) • Beam Cleaning in LHC (LSS3 &7) Triumf • 48 double aperture quadrupoles (warm) • 16 dipoles • 48 correcters (dipoles)

  39. Magnets for TI2/TI8 Dipoles Received: 204 out of 360Quadrupoles: 96 of 180

  40. Status MSI / IHEP Protvino/ Russia prototype steel septum magnet MSIB for LHC injection built and tested Missing: measurement of field homogeneity

  41. Warm Quads for beam cleaning insertions Pre-Series Status ALSTOM / Montreal / Canada MQW At present: Assembly of 1st pre-series magnet..... Delivery to CERN in February 2001

  42. GROUPS OP SPS as LHC injector • Project leader • Several other OP personnel involved LHC Controls Project • Deputy project leader • Several OP personnel will be involved LHC string 2 • Team of 4 involved, controls from PCR in 2001 INB regulations • Significant OP involvement PCR upgrade for the LHC era • Team of 6 looking into this (with EA and CO)

  43. GROUPS PO • Main circuits split in 8 sectors, high voltage at ramp, low voltage at coast • Very high currents at very low voltage • Extremely high precision and resolution for the main circuits • Underground installation, because of cable cost and power losses • High efficiency and water cooling • Small volume, low weight

  44. Power Converters: Constraints • Technology not readily available from industry, even less than before • Electro Magnetic Compatibility (EMC) • Large stored magnetic energy • Many 4-quadrant converters • Orbit correctors located along the tunnel: radiation resistance, distributed control • Fast real-time control = high data rates and fixed transmission time

  45. Power Converters: General Approach • Minimise the number of converter types • Separate out the subsystems that are desirable/acceptable by industry. Place development and production contracts. • Design and build prototypes of remaining subsystems. Place production contracts. • Assume system integration responsibility • Integration and test at CERN before installation

  46. GROUPS PO: String 2 powering area

  47. GROUPS PO [13kA , 16V] = (4 + 1) * [3.25kA,16V] Free wheel diodes IGBT inverter

  48. GROUPS PO Digital controller Connection rack High precision 13kA DCCT

  49. Non Technical Topics • Memo sent to Division in March 2000 (i.e. my MOAS) • Five Year Review and New Career Structure

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