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

Contents 2 Gamma Irradiation Facility GIF++  Layout  Technical infrastructure  Operation  Radiation protection  Safety 03/10/2013A. Fabich, EN-MEF-LE

The present GIF in the West Area 3  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. 03/10/2013A. Fabich, EN-MEF-LE West Area

H6 beam line H2 beam line H4 beam line H8 beam line GIF++ GIF++ location in EHN1 (North Area) 403/10/2013A. Fabich, EN-MEF-LE West Area EHN 1

503/10/2013A. Fabich, EN-MEF-LE

GIF++ layout (1) 603/10/2013A. Fabich, EN-MEF-LE dump secondary beam PPE (entrance) MAD PPG PPX (only emergency) dump gas mixing zone Preparation zone cable trays to control room Irradiation area

GIF++ layout (2) 703/10/2013A. Fabich, EN-MEF-LE secondary beam  -field 2  -field 1 shielding preparation zone gas mixing zone shielding ±37° cut view at 2m height PPE PPG PPX

Large material access 03/10/2013A. Fabich, EN-MEF-LE8

Irradiation field (1) 03/10/2013A. Fabich, EN-MEF-LE9

Irradiation field (2) 03/10/2013A. Fabich, EN-MEF-LE10

Secondary muon beam 11 From T2 target 99% of beam are within 10 cm x 10 cm, remainder spread over 1 m 2  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++ 03/10/2013A. Fabich, EN-MEF-LE

General infrastructure 12  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. 03/10/2013A. Fabich, EN-MEF-LE Measurements: autumn 2012 – spring 2013 (courtesy: R. Guida)

Source Ground - Trigger Cable Trays False Floor: permanent supplies 1303/10/2013A. Fabich, EN-MEF-LE Dennis Haasler Same concept in preparation area 40 cm free height Reducing the source height to 2 meter

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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 03/10/201315A. Fabich, EN-MEF-LE Personal Protection Exit Personal Protection Gate Personal Protection Entry PPE & Turnstile Pre Zone Small material access

GIF++ control room  HNA /10/2013A. Fabich, EN-MEF-LE16 GIF++

Cables irradiator – using PPE and gallery 03/10/ m Irradiator HNA 487 Cable tray height 2.5 m Roof height 4.8 m Under floor height 0 m A. Fabich, EN-MEF-LE17 D. Pfeiffer

Cable routing – shortest to control room 03/10/2013 ca. 70 m HNA 487 Cable tray height 2.5 m Roof height 4.8 m Under floor height 0 m A. Fabich, EN-MEF-LE18 D. Pfeiffer

Photon yields to muon detectors 1903/10/2013A. Fabich, EN-MEF-LE roof chamber Average flux 1.0 e5 s^-1 cm^ -2 floor chamber Average flux 1.2 e3 s^-1 cm^ -2 Downstream beam trigger: average flux 1.8 e4 s^-1 cm^ -2 Upstream beam trigger: average flux 5.9 e4 s^-1 cm^ -2 fine tracker Average flux 5.1 e5 s^-1 cm^ -2 D. Pfeiffer

Trapezoid shaped collimator yz 2003/10/2013A. Fabich, EN-MEF-LE Point source Cylindrical source No difference between point and cylindrical source D. Pfeiffer

Safety responsibility for implementation 21 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) 03/10/2013A. Fabich, EN-MEF-LE

GIF++ irradiation zone 22 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 03/10/2013A. Fabich, EN-MEF-LE

Radiation levels 23  Keeping lateral exterior limit well below 3  Sv/h  At least 80 cm concrete  Accordingly adapted chicanes  Roof (no stay area) shielding adjusted for < 15  Sv/h  Final design based on these conceptual shielding studies 03/10/2013A. Fabich, EN-MEF-LE horizontal cut at source height ( 2m) 160 cm

Radiation shielding 24  Shielding blocks  Double layer closing the block joints  Roof gaps closed with dedicated iron beams  Chicanes for entrances 03/10/2013A. Fabich, EN-MEF-LE  -field 2  -field 1 Vertical cut view Top cut view 160 cm max. 3  Sv/h max. 15  Sv/h max. 3  Sv/h

Radiation protection 25  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. 03/10/2013A. Fabich, EN-MEF-LE

Operational controls 26  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. 03/10/2013A. Fabich, EN-MEF-LE

Safety conditions for active irradiator 27  Exclude direct exposure to  -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. 03/10/2013A. Fabich, EN-MEF-LE upstream dump downstream dump

Conclusions 28  3D model of GIFF++ is available  Require design documents of irradiator+filter system  Approved status  CERN will study the mechanical integration 03/10/2013A. Fabich, EN-MEF-LE