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GIF++ implementation

GIF++ implementation. Adrian Fabich , Sylvain Girod, EN-MEF-LE Technical meeting with Supplier of Irradiator , 3 rd October 2013. Contents. Gamma Irradiation Facility GIF++ Layout Technical infrastructure Operation Radiation protection Safety. The present GIF in the West Area.

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GIF++ implementation

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  1. GIF++ implementation Adrian Fabich, Sylvain Girod, EN-MEF-LE Technical meeting with Supplier of Irradiator, 3rd October 2013

  2. Contents Gamma Irradiation Facility GIF++ • Layout • Technical infrastructure • Operation • Radiation protection • Safety A. Fabich, EN-MEF-LE

  3. The present GIF in the West Area • Present GIF installed in former West Area • Since 2004 secondary (muon) beam de-commissioned • Since then only of limited use for physics • Limited photon yield (137Cs, 650 GBq installed in `90s) • Limited space for increasing number of users • GIF will be decommissioned with the new GIF++ being operational. West Area A. Fabich, EN-MEF-LE

  4. GIF++ location in EHN1 (North Area) H2 beam line GIF++ EHN 1 H4 beam line H6 beam line H8 beam line West Area A. Fabich, EN-MEF-LE

  5. https://edms.cern.ch/nav/SMTI137:ST0428786 A. Fabich, EN-MEF-LE

  6. GIF++ layout (1) PPX (only emergency) dump Irradiation area dump secondary beam PPG gas mixing zone Preparation zone MAD cable trays to control room PPE (entrance) A. Fabich, EN-MEF-LE

  7. GIF++ layout (2) cut view at 2m height shielding PPX shielding shielding shielding g-field 1 g-field 2 ±37° secondary beam ±37° shielding PPG shielding preparation zone gas mixing zone PPE A. Fabich, EN-MEF-LE

  8. Large material access A. Fabich, EN-MEF-LE

  9. Irradiation field (1) A. Fabich, EN-MEF-LE

  10. Irradiation field (2) A. Fabich, EN-MEF-LE

  11. Secondary muon beam From T2 target 99% of beam are within 10 cm x 10 cm, remainder spread over 1 m2 • Main user mode:couple of periods per year with each about two weeks duration • Parasitic mode with muons: as much as possible (based on experience from previous years, one can expect parasitic muon beams for about 30-50% of the beam time, equivalent to about 2-4 months/year). • Few periods per year of approximately two weeks duration in which a beam pipe is installed within the facility and electron beam is taken by CMS ECAL downstream from GIF++ A. Fabich, EN-MEF-LE

  12. General infrastructure • Electricity: 50 kW • light (+emergency) • Ethernet • cabling, cable trays • demineralised water • NO cryogenics • Beam equipment • Beam instrumentation • Gases • Neutral and mixtures (containing flammable gases) • 15 gas supplies from the gas hut (build. 909) • 10 patch panels in bunker/preparation zone • Each for 4 neutral and 4 hazardous gases • Cooling and ventilation • Optional • Supply lines should mainly be installed in the raised floor. Measurements: autumn 2012 – spring 2013 (courtesy: R. Guida) A. Fabich, EN-MEF-LE

  13. FalseFloor: permanent supplies • 40 cm freeheight • Reducingthesourceheight to 2 meter Cable Trays Source Ground - Trigger Dennis Haasler Same concept in preparationarea A. Fabich, EN-MEF-LE

  14. A. Fabich, EN-MEF-LE

  15. Personnel and Material Access • PPG, Roof: If opened, patrol lost • PPE & Turnstile: Access rights of people checked, key released and people counted • PPE2: Key that was taken at turnstile has to be used in key access mode (patrol not lost) • MAD: access for material up to PC size Personal Protection Exit Personal Protection Gate Small material access Pre Zone Personal Protection Entry PPE & Turnstile A. Fabich, EN-MEF-LE

  16. GIF++ control room • HNA 487 GIF++ A. Fabich, EN-MEF-LE

  17. Cables irradiator – using PPE and gallery Irradiator D. Pfeiffer 94 m Cable tray height 2.5 m Roof height 4.8 m Under floor height 0 m HNA 487 A. Fabich, EN-MEF-LE

  18. Cable routing – shortest to control room D. Pfeiffer ca. 70 m Cable tray height 2.5 m Roof height 4.8 m Under floor height 0 m HNA 487 A. Fabich, EN-MEF-LE

  19. Photon yields to muon detectors D. Pfeiffer Downstream beam trigger: average flux 1.8 e4 s^-1 cm^ -2 Average flux 1.0 e5 s^-1 cm^ -2 roof chamber Upstream beam trigger: average flux 5.9 e4 s^-1 cm^ -2 Average flux 5.1 e5 s^-1 cm^ -2 Average flux 1.2 e3 s^-1 cm^ -2 floor chamber fine tracker A. Fabich, EN-MEF-LE

  20. Trapezoid shaped collimator yz D. Pfeiffer Point source Cylindrical source No difference between point and cylindrical source A. Fabich, EN-MEF-LE

  21. Safety responsibility for implementation with SBA (together with CERN expert groups) • Radiation shielding • Flammable gas detection and ODH (in bunker) • Fire detection • Access system/personnel protection • Interlock(s), also with irradiator • Gas zone: ATEX conform (PH) A. Fabich, EN-MEF-LE

  22. GIF++ irradiation zone The irradiation zone hosting the irradiator • is a controlled area (PPE154). • inside a supervised area (EHN1). • No risk of activation due to low intensities of secondary beam • Presence of high intensity photon source requires additional precautions due to the prompt radiation levels: • Extended shielding • Access system • Entrance chicanes A. Fabich, EN-MEF-LE

  23. Radiation levels • Keeping lateral exterior limit well below 3 mSv/h • At least 80 cm concrete • Accordingly adapted chicanes • Roof (no stay area) shielding adjusted for < 15 mSv/h • Final design based on these conceptual shielding studies horizontal cut at source height ( 2m) 160 cm A. Fabich, EN-MEF-LE

  24. Radiation shielding Vertical cut view • Shielding blocks • Double layer closing the block joints • Roof gaps closed with dedicated iron beams • Chicanes for entrances max. 15 mSv/h 160 cm max. 3 mSv/h g-field 2 g-field 1 max. 3 mSv/h Top cut view A. Fabich, EN-MEF-LE

  25. Radiation protection • RP monitoring • Inside the irradiation area • Monitoring of the source operation • Dedicated RP monitoring • 2 redundant ionization chambers connected to RAMSES • Veto to the source operation • In the surrounding EHN1 area • Monitoring by existing beam monitoring (EHN1 standard) Access system • EHN1 standard • Access safety elements compliant with SIL3 • Single Access System (SAS) for counting persons in the area. A. Fabich, EN-MEF-LE

  26. Operational controls • Users’ interface: CESAR • For personnel access and beam control Standard HW/SW integration into SBA controls environment • Access controls • Beam controls • Safety elements • Irradiator provided with its own console. Only link to SBA controls via veto line and status logging. A. Fabich, EN-MEF-LE

  27. Safety conditions foractive irradiator • Exclude direct exposure to g-source • Source out of parking position only possible if • GIF++ access chain is CLOSED • AND (protecting in upstream zone) • Upstream beam dump is IN-BEAM • OR • PPE144 is CLOSED (no access) • AND (protecting in downstream zone) • Downstream beam dump is IN-BEAM • OR • PPE164 is CLOSED (no access) • AND (no alarms) • No fire • No power failure • No emergency stop button • Irradiator controls included in industrial delivery. • Veto from CERN safety chain will force source into parking position. downstream dump upstream dump A. Fabich, EN-MEF-LE

  28. Conclusions • 3D model of GIFF++ is available • Require design documents of irradiator+filter system • Approved status • CERN will study the mechanical integration A. Fabich, EN-MEF-LE

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