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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. - PowerPoint PPT Presentation
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GIF++ implementation
Adrian Fabich, Sylvain Girod, EN-MEF-LE
Technical meeting with Supplier of Irradiator, 3rd October 2013
2 A. Fabich, EN-MEF-LE
Contents
Gamma Irradiation Facility GIF++
Layout Technical infrastructure Operation Radiation protection Safety
03/10/2013
3 A. Fabich, EN-MEF-LE
The present GIFin 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.
03/10/2013
West Area
4 A. Fabich, EN-MEF-LE
H6 beam line
H2 beam line
H4 beam line
H8 beam line
GIF++
GIF++ location in EHN1 (North Area)
03/10/2013
West Area
EHN 1
5 A. Fabich, EN-MEF-LE 03/10/2013
https://edms.cern.ch/nav/SMTI137:ST0428786
6 A. Fabich, EN-MEF-LE
GIF++ layout (1)
03/10/2013
dump
secondary beam
PPE (entrance)
MAD
PPG
PPX (only emergency)
dump
gas mixing zone
Preparation zonecable trays to control room
Irradiation area
7 A. Fabich, EN-MEF-LE
GIF++ layout (2)
03/10/2013
secondary beamg-field 2 g-field 1
shielding
preparation zone
gas mixing zone
shielding
shieldingshielding
shielding
shie
ldin
g
±37°±37°
cut view at 2m height
PPE
PPG
PPX
8 A. Fabich, EN-MEF-LE
Large material access
03/10/2013
9 A. Fabich, EN-MEF-LE
Irradiation field (1)
03/10/2013
10 A. Fabich, EN-MEF-LE
Irradiation field (2)
03/10/2013
11 A. Fabich, EN-MEF-LE
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++
03/10/2013
12 A. Fabich, EN-MEF-LE
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.
03/10/2013
Measurements: autumn 2012 – spring 2013 (courtesy: R. Guida)
13 A. Fabich, EN-MEF-LE
Sour
ce Ground
- Trigger
Cable Trays
False Floor: permanent supplies
03/10/2013
Dennis Haasler
Same concept in preparation area
• 40 cm free height• Reducing the source height to 2 meter
14 A. Fabich, EN-MEF-LE 03/10/2013
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
03/10/2013A. Fabich, EN-MEF-LE
Personal Protection Exit
Personal Protection Gate
Personal Protection EntryPPE & Turnstile
Pre ZoneSmall material access
16 A. Fabich, EN-MEF-LE
GIF++ control room
HNA 487
03/10/2013
GIF++
17 A. Fabich, EN-MEF-LE
Cables irradiator – using PPE and gallery
03/10/2013
94 m
Irradiator
HNA 487
Cable tray height 2.5 mRoof height 4.8 mUnder floor height 0 m
D. Pfeiffer
18 A. Fabich, EN-MEF-LE
Cable routing – shortest to control room
03/10/2013
ca. 70 m
HNA 487
Cable tray height 2.5 mRoof height 4.8 mUnder floor height 0 m
D. Pfeiffer
19 A. Fabich, EN-MEF-LE
Photon yields to muon detectors
03/10/2013
roof chamber
Average flux 1.0 e5 s^-1 cm^ -2
floor chamberAverage 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
20 A. Fabich, EN-MEF-LE
Trapezoid shaped collimator yz
03/10/2013
Point source Cylindrical sourceNo difference between point and cylindrical
source
D. Pfeiffer
21 A. Fabich, EN-MEF-LE
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)
03/10/2013
22 A. Fabich, EN-MEF-LE
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
03/10/2013
23 A. Fabich, EN-MEF-LE
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
03/10/2013
horizontal cut at source height ( 2m)
160 cm
24 A. Fabich, EN-MEF-LE
Radiation shielding
Shielding blocks Double layer closing the block joints
Roof gaps closed with dedicated iron beams Chicanes for entrances
03/10/2013
g-field 2 g-field 1
Vertical cut view
Top cut view
160 cm
max
. 3 m
Sv/h
max. 15 mSv/hm
ax. 3 mSv/h
25 A. Fabich, EN-MEF-LE
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.
03/10/2013
26 A. Fabich, EN-MEF-LE
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.
03/10/2013
27 A. Fabich, EN-MEF-LE
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.
03/10/2013
upstreamdump
downstreamdump
28 A. Fabich, EN-MEF-LE
Conclusions
3D model of GIFF++ is available
Require design documents of irradiator+filter system Approved status CERN will study the mechanical integration
03/10/2013