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Technology Department Frédérick Bordry 8 th June 2009

Technology Department Frédérick Bordry 8 th June 2009. Technology Department Mandate. The Technology Department is responsible for technologies which are specific to existing particle accelerators, facilities and future projects.

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Technology Department Frédérick Bordry 8 th June 2009

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  1. Technology Department Frédérick Bordry8th June 2009

  2. Technology Department Mandate The Technology Department is responsible for technologies which are specific to existing particle accelerators, facilities and future projects. The main domains of activities cover: magnets (superconducting, normal conducting, fast pulsed magnets, electrostatic and magnetic septa), their machine integration and protection, power converters, cryogenics, high & ultra-high vacuum systems, coatings and surface treatments. The Technology Department provides support to the experimental detectors, mainly for cryogenics, vacuum, coatings, surface treatments and power converters. The dominating part of the activities for the next few years is the operation of the LHC (LHC ring and injectors) and its upgrades (LHC injector consolidation, Linac 4, SLHC phase 1). The Technology Department is responsible to design equipments, systems and studies where necessary for consolidations, upgrades (SPL, PS2, SLHC phase 2,…) and future CERN projects (CLIC,…)

  3. TE-ABT mandate : Accelerator Beam Transfer 51 staff • The group is in charge of the design, development, construction, installation, exploitation and maintenance of injection and extraction related equipment: • fast pulsed magnets with associated high voltage pulse generators and transmission lines; • electrostatic and magnetic septa, including high voltage power supplies for electrostatic septa; • extraction related protection devices; • associated equipment-level control systems (hard- and software). • The group is responsible for injection and extraction systems in the entire accelerator complex and for beam transfer lines between accelerators and primary beam lines up to targets, including the full commissioning of the LHC injection and beam dumping systems and their potential upgrade. This responsibility comprises the conception, layout and optics design, equipment specification, technical coordination, commissioning, performance follow-up and beam physics of underlying processes.

  4. TE-ABT: Fast pulsed systems (“kickers”) many different shapes/sizes LHC injection kickers GTO based HV switch 5 m long L-C network • very short pulses (from O(100 ns): strip-line kickers … Ferrite cores … up to >100 μs: steel tapes) • high voltage (up to 80 kV), high current (up to 30 kA) • high voltage assemblies and circuitry (switches (gas tubes or semiconductor), cables, connectors) • ultra high vacuum (down to 10-11 mbar), precision mechanics, brazing/welding techniques, various metals, surface coating, ceramic insulators and capacitors (in vacuum) • oil and gas systems for insulation and cooling • simulation and measurements of electric/magnetic fields, pulse forms, beam impedance

  5. TE-ABT: Electrostatic and magnetic septa many different shapes/sizes HV deflector septum magnet foil tensioners insulators positioning system typically high radiation levels HV electrode thin foil (or wires) beam screen vacuum tank • high voltage (up to 300 kV) electrostatic devices and accessories (cables, switches, resistors, …) • pulsed (ms to s), high current (up to 40 kA, 100 A/mm2), thin water-cooled septum coils • ultra high vacuum (down to 10-12 mbar), precision mechanics, precision positioning systems, brazing/welding techniques, various metals, surface coating, ceramic insulators • electromagnetic field calculations, mechanical stress analyses, thermal/cooling considerations

  6. TE-CRG Mandate : Cryogenics 65 staff Methodology • Design, construction, operation & maintenance of cryogenic systems for accelerators and detectors • Design, construction, commissioning, operation and maintenance of the cryogenic systems for CERN accelerators and detectors • Operation, maintenance and upgrade of cryogenic test facilities • Support for low-temperature developments & tests at the Central Cryogenic Laboratory • Supply of cryogenic fluids on the CERN site • Consultancy & support in cryogenic design & cryogenic instrumentation.

  7. Helium Refrigerators 1.8 K refrigerationunits (up to 2.4 kW @ 1.8 K) 4.5 K Refrigerators (up to18 kW @ 4.5 K)

  8. Cryogen Storage and distribution Vertical transfer line GHe storage LN2 storage Cryo-magnet Distribution line (QRL) Interconnection box

  9. TE-EPC Mandate 66 staff TE-EPC (Electrical Power Converters) group is responsible for design, procurement or construction, installation, commissioning, operation and maintenance of all: Electrical Power Converters and static VAR compensators for the present and future accelerators, including experimental areas at CERN.

  10. [2kA, 8V] Soft-switching modular power converters • 1-quadrant converters: • [13kA,18V] : 5*[3.25kA,18V] • [8kA,8V] : 5*[2kA,8V] • [6kA,8V] : 4*[2kA,8V] • [4kA,8V] : 3*[2kA,8V]

  11. New PS 60 MW power system 2009-2010: Last year(s) of operation for the PS rotating machine! Fully static power converter Exchange of energy between capacitor banks and the magnets First power test: Dec. 2009

  12. Beam passage 700 µs Pulsed Klystron modulators for LINAC’s (ex. Linac 4) • Characteristics : • - output voltage : 100 kV • - output current : 20 A • - pulse length : 700 s • - flat top stability : better than 1% • - 2 Hz repetition rate Peak power : 2 MW

  13. SVC’s and harmonic filters at CERN (status 2009) • Total of SVC’s / filter inst.: 12 • Rated voltage: 18 kV • Total surface: 14’000 m2 • Total value (prices 2007): 45 MCHF • Total capacitive power: 550 Mvar (=17.6 kA @ 18 kV) • For comparison: • CERN consumption 2008: 380 MVA peak • (=12.2 kA peak @ 18 kV)

  14. TE- MSC Mandate: Magnets, Superconductors, Cryostats 94 staff • Design, construction and measurements of Superconducting and Normal conducting Magnets for the CERN accelerator complex. • Design and construction of cryostats for magnets, SCRF cryomodules and other accelerator equipments. • Support to operation of the accelerators for magnets, current leads, operation of the magnet and cryostat facilities. • Development of associated technologies, namely superconductors, insulation and polymers, superconducting electrical devices and magnetic measurements for present and future accelerators.

  15. Superconductivity LHC 400 tonnes of high quality NbTi (47%); Used in 1200 tonnes - 7000 km of Cu/NbTi cable; more than 20,000 measurements at 1.9 K T = 4.2 K

  16. HTS applications Present LHC application: Ag/Bi-2223 Current : > 15 kA @ 50 K Assembly of short strips (< 50 cm) Rigid conductor Superconductor expensive New studies: LHC upgr. new application: MgB2 Current : > 15 kA @ 20 K Length : > 60 m Flexible cable Cheap Superconductor Future : development of >150 m cable 15 kA @ 60-80 K with Ybco

  17. Electromagnetic and thermo-mechanical modeling

  18. Magnet technology: high field in - so far – moderate size

  19. Power test of magnets (1.9K – 13 kA)electronics and device for precise meas.

  20. TE- MPE Mandate 27 staff Machine Protection and Electrical integrity • Support LHC operation and maintain state-of-the art technology for magnet circuit protection and interlock systems for the present and future accelerators, magnet test facilities and CERN hosted experiments. • Responsibility for the electrical integrity of magnet circuits. • Coordination of the commissioning of the LHC magnet system (“Hardware Commissioning”) and magnet circuit performance evaluation. • Coordination of the LHC machine protection systems and responsibility for its coherence and overall performance. • Specific studies related to machine protection for topics that go across different systems. • Responsibility for the functional operation of DFBs, DSLs and their auxiliary equipment. • Responsibility for the electrical quality assurance (ELQA) during magnet interconnections and hardware commissioning as well as for electrical diagnostics and interventions during operation. • Responsibility for the magnet protection system and machine interlocks for the CERN accelerator complex, including design, construction and exploitation. • To guarantee permanence of expertise, follow the state-of-the-art and to develop knowledge for design, construction and operation of failsafe and reliable electronics.

  21. Electrical systems Compact assembly of 13 kA circuit breakers and dump resistors capable of dissipating 700 MJ. High current, radiation tolerant cold by-pass diodes for LHC main magnets. High reliability cost effective 600 A energy extraction system.

  22. Warm Magnet Interlock system Controls Config. DB Protects resistive magnets overheating: collects inputs from thermo-switches, flow meters,… and gives the Power Permit,. PVSS Operator Console Technical network In addition: removes beam permit in case of powering failure. Beam Permit BIS interface Warm magnet Interlock Controller ► Based on Safety PLC (F series from Siemens) PowerConverter ► for fast dump request (few μS): associated with Fast Boolean processor Status info Power Permit Thermo-switches Water Flow meter, Red button… Thermo-switches @60°C (Magnet+1) Magnet (FM 352 from Siemens)

  23. Beam Interlocks Protects LHC from beam Operation: collects User Permit from involved systems (VAC, BLM, RF, Powering Interlocks, Experiments, etc… ) and therefore gives the Beam Permit, ortriggers beam dump in case of failure. ► Highly reliable (SIL3), Fast (few μS) and “monitorable” ► << Home made design >>in using Programmable Logic devices from Xilinx: ►from “small” 288 macro-cells CPLD for the safety part ►to large* Spartan 3 FPGA for the monitoring part (*) say 1,000,000 gates + all the built in RAM ,etc. Controls Config. DB Operator Console • (Java Application) ► Fibre Optics links between Controllers Technical network Optical board ► ~200 connections to User Systems Beam Permit Loops (F.O.) User System #1 coppercable User Permit User Interfaces Beam Interlock Controller embedded in VME chassis Up to 14 User Systems

  24. TE- VSC Mandate: Vacuum, Surfaces & Coatings 67 staff • Design, construction, operation, maintenance and upgrade of high & ultra-high vacuum systems for Accelerators and Detectors. • Expertise and support on thin-walled vacuum chambers, windows and bellows compensation systems • Expertise in vacuum sealing and leak-tightness technology • Management of the industrial support contract for vacuum work in accelerators • Expertise in vacuum control systems, vacuum interlocks and monitoring tools • Surfaces treatments, Coatings, surface and chemical analysis for Accelerators & Detectors. • Expertise and support in the fields of: • Coatings, electroplating and surface cleaning techniques • UHV characterization and of material and surfaces • Degassing analysis and treatments

  25. Domains of ExpertiseVacuum Engineering for Accelerators • Vacuum Engineering for Accelerators • Finite element calculations for thin-walled and cantilever structures in Experimental Areas • Vacuum interconnection design optimized for High Order Modes (HOM) and beam impedance for RT and cryogenic beam pipes • Advanced material for Detector’s beam pipes • Special supporting structures for Detectors (wires, low-Z supports, etc.) • Design of vacuum systems to prevent beam-induced high voltage breakdowns: flanges, surface treatments and coatings

  26. Domains of Expertise Coatings and Plasma Processing TPB deposition for WArP Gold deposition for CAST • CERN-wide support and expertise to accelerators and detectors in the domain of thin film coatings • Thin film coating facilities with a special focus on physical deposition techniques: evaporation, diode and magnetron sputtering • Complex shape and all types of materials including a-C and NEG coatings • Specific techniques for plasma processing of surfaces, including plasma cleaning and glow discharge • Removal of hydrocarbon contamination on Beryllium beam pipes using an oxygen discharge • Expertise for numerical simulations of special cases of coatings, vacuum and plasmas

  27. Domains of Expertise Chemical and Surface Analysis Surface analysis: XPS-SIMS-AES Outgassing of amorphous carbon films • CERN-wide support and expertise to accelerators and detectors in the domains of: • Surface and chemical analysis • Expertise in radiation damage of polymeric materials • Outgassing analysis (metals and polymers) and degassing treatments • Permeation in polymers and metals • Gas analysis by chromatographic techniques Radiation induced ageing

  28. Conclusion

  29. TE-ABT: Electronics + controls (for kickers, septa, protection eqpt) fast kicker timing and interlocks “beam energy meter” card energy tracking system for LHC dump software for kicker waveform surveillance application program for machine operators • high precision fast pulsed timing, high-reliability triggering systems • analogue waveform acquisition and analysis, servo positioning systems, industrial slow controls • power electronics, power supplies for HV charging purposes, thyratron heating, electrostatic septa • equipment-level software, diagnostic tools, interface to main control system, spec. application SW

  30. Cold turbo-machines Turbo-expanders Cold Compressors and Pumps

  31. Global PM Event Global PM Event LHC tracking : Ramp of RB, QF, QD (RB function is copied to QF and QD) Iref(RB_5TeV) = Iref(RQF_5TeV) = Iref(RQD_5TeV)

  32. Digital and analog electronics, design of protection systems Digital FPGA based radiation tolerant protection system for superconducting magnets. High precision measurement system for large scale online diagnostics and protection of electrical interconnections.

  33. SVC BEQ2 (2002) for SPS

  34. Insulation for cryogenic environment Development of new insulation with enhanced porosity for LHC upgrade Development of insulation very fine and capable of 20 kV with strong mechanical robustness; Covered 50 km of LHC cold bore tube HV Tests on cylindrical geometries In addition to standard HV tests (DC and impulse test up to 140 kV) on materials and components, we perform HV tests on cylindrical geometries, as insulated tubes, with specifically designed electrodes. Used for testing the dielectric strength of ITER feeders and as a CERN wide service for example for HV testing ceramic coatings .

  35. SMI2 180 SMA18 SM18

  36. Magnet Rescue MQs in 904, waiting to be repaired Dipolesfrom 3-4 in bldg 181 Pit in 181 bldg : prepared for MQ (vertical line)

  37. Normal Conducting Magnets : LINAC 4 project • In total 95 magnets of 8 types • Magnet work package defined • Design work started • First contracts beginning 2009 Combined Corrector Transfer Line Quadrupole

  38. SSS: integrates key items • BPM and instrumentation feed-throughs • Resistive current leads for orbit corrector dipoles • Link to cryo distribution line • Cryogenic ancillaries and diagnostics (He phase separator, He level gauges, P transducers, ... ) • Vacuum Barriers • ...

  39. SSS: complex in variants and assembly (main components only)

  40. LHC, the push for energy: a gigantic magnet system Bdip8.3 T Rdip  3 kmLdip  15 m  1232Ltunnel = 27 km 1500 tonnes of top quality SC cables 15’000 MJ of magnetic energy

  41. Domains of Expertise Vacuum Controls and Interlocks Hydrogen oscillation Multiple beam shots • Vacuum Controls and Interlocks for Accelerators • Design and implementation of PLC based front-end electronics for pressure and temperature acquisition and machine protection interlocks • Design and implementation of database (ORACLE) driven PVSS vacuum supervision interfaces for accelerators • Validation of the vacuum electronic equipment installed in the accelerator tunnel, which will be subjected to neutron, fast-particle and gamma radiation

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