FUTURE IRRADIATION FACILITIES AT CERN Lucie Linssen PH/LCD - for the Irradiation Facilities WG  Introduction.

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Presentation transcript:

FUTURE IRRADIATION FACILITIES AT CERN Lucie Linssen PH/LCD - for the Irradiation Facilities WG  Introduction on irradiation facilities  Present situation  User survey  Future prospects  Possible implementations  Summary CERN, May 13th Lucie Linssen, Physics Opportunities Workshop

Irradiation facilities working group CERN-wide working group: Mandate Mandate:  Collect requirements for future irradiation facilities at CERN, taking into account availability of facilities outside CERN  Put these requirements in the context of presently available facilities/infrastructures at CERN.  Propose cost-effective options for future facilities, aiming for a maximum of synergy.  Produce a (yellow) report on the findings CERN, May 13th Lucie Linssen, Physics Opportunities Workshop Composition  R. Assmann – BE/ABP  J. Bauche – TE/MSC  M. Brugger – EN/STI  M. Capeans – PH/DT  F. Corsanego – DG/SCG  I. Efthymiopoulos – EN/MEF  D. Kramer – EN/STI  L. Linssen – PH/LCD (chair)  R. Losito – EN/STI  M. Moll – PH/DT  C. Rembser – PH/ADE  M. Silari – DG/SCR  Y. Thurel – TE/PO  R. Trant – DG/SCH  E. Tsesmelis – DG/DG  H. Vincke – DG/SCR  T. Wijnands – EN/STI

 Irradiation facilities – what for?  Setup and operate an irradiation facility – what it really involves? Introduction CERN, May 13th Lucie Linssen, Physics Opportunities Workshop

Irradiation facilities CERN, May 13th 2009Lucie Linssen, Physics Opportunities Workshop 4  Test and development of prototypes or final assemblies before installation in a radiation environment  issues addressed (not exhaustive) SEU, radiation damage, performance degradation of electronics beam impact or radiation damage on materials performance degradation after long exposure (ageing) performance evaluation under background/”noise” conditions  passive or “hot” (i.e. online) irradiations  Test or calibration of components  radiation measurement/monitoring devices  feedback data to simulation codes What for?

Setup and operate an irradiation facility CERN, May 13th  Deliver the desired beam  intensity, beam spot, time structure (slow or fast extraction)  steering : beam and/or equipment (scanning table)  monitoring of beam intensity and radiation field reference maps available to users  Know and control the radiation environment  provide detailed Monte Carlo simulations in order to have well-defined spectra  in-situ dosimetry providing information on the actual doses accumulated  escaping radiation (by shielding) and internal activation (by design) must remain within limits  for high intensities: closed ventilation loop, humidity control Impact on infrastructure – optimized maintenance procedures  Access conditions  pre-test documentation, preparation and optimization: materials, time  access authorization, training  traceability : in/out movements, logs, RP control What it really involves? Lucie Linssen, Physics Opportunities Workshop

Setup and operate an irradiation facility CERN, May 13th  Auxiliary installations  nearby control room for “hot” tests during exposure  remote handling of equipment and services  storage area initial cool down just after exposure medium/long term storage in view of future re-use  qualified lab to work on exposed materials modify for re-use, analysis after irradiation  flexible detector infrastructure E.g. gas systems, cooling  Final product: make scientific results available to the community document and spread out the knowledge results database: materials, components,.. .. and radioactive waste must be considered from the beginning ! … what it really involves? Lucie Linssen, Physics Opportunities Workshop

 PS  Proton irradiation facility in the East Area (since 1992)  SPS  GIF - Gamma Irradiation Facility in the West Area (since 1997)  CERF - CERN Reference Facility in the North Area (since 1992)  (parasitic) irradiation of electronics in CNGS … and ad-hoc tests – now decommissioned  (parasitic) irradiation of electronics in the SPS/TCC2 target area  material test (collimators, targets) in TT40 line  (parasitic) irradiation of materials or “target units” in ISOLDE Present Irradiation Facilities CERN, May 13th Lucie Linssen, Physics Opportunities Workshop Due to limited time for this talk, please see spare slides for summary on the current/past facilities with their assets and shortfalls

 Survey results  Requirements, future prospects,  Possible implementations User survey CERN, May 13th Lucie Linssen, Physics Opportunities Workshop

User survey CERN, May 13th 2009Lucie Linssen, Physics Opportunities Workshop 9  Web-based questionnaire launched to a very wide community  Details in :  145 replies extensive requests from LHC experiments and accelerator groups for present and in view of the upgrade program  Questions asked on:  Beam type: gamma, proton, mixed field particle energy, spill-type, …  Total dose, irradiation surface, exposure profile  Dimensions of experimental area, infrastructure  Access needs during exposure  Thorough analysis of the replies to understand the user requirements.  The WG investigated the possibilities to combine needs and minimize the proposed facilities. Diverse requirements make several facilities necessary. Future needs for irradiation facilities

User survey - conclusions CERN, May 13th 2009Lucie Linssen, Physics Opportunities Workshop 10 1.High-energy and high-density proton (ion) irradiations : 5 replies  impact of intense pulsed beams to materials  proposed facility : HiRadMat  primary use : LHC collimators & absorbers 2.Gamma irradiations with beam : 37 replies  study long-term exposure of equipment  proposed facility : GIF  GIF++  primary use : muon trackers of LHC experiments, detector or accelerator electronic components, beam diagnostic equipment Identified needs

User survey - conclusions CERN, May 13th 2009Lucie Linssen, Physics Opportunities Workshop 11 3.High-intensity proton irradiation (slow, slow-fast extraction): 52 replies  study long-term exposure of equipment  primary use: inner trackers of LHC experiments, detector or accelerator electronic components, beam diagnostic equipment  proposed facility: continue with PS East Area  future facility at PS2 4.Mixed field irradiations : 39 replies  study impact on system components exposed in radiation fields  primary use: LHC accelerator and detector components (SEE studies), radiation monitoring calibration  proposed facility : CNGS, CERF  CERF++ 5.Heavy ions: 12 replies  the feedback does not indicate the need for a construction of an exclusive Heavy Ion Irradiation Facility. If the availability of ions can be added at low cost to the plans for one of the future CERN irradiation facilities, it should definitely be included. Identified needs

The HiRadMat Facility CERN, May 13th 2009Lucie Linssen, Physics Opportunities Workshop 12  Study the impact of intense pulsed beams on materials  Thermal management (heating) material damage even below melting point material vaporization (extreme conditions)  Radiation damage to materials – change of properties  Thermal shock - beam induced pressure waves  Test bed, important for the design validation of LHC near- beam components before installation in the machine  Requires LHC-type beam from pilot to 288 nominal bunches Key assets

The HiRadMat Facility  modify the TI2 extraction line to deflect an LHC- type beam towards the old WANF area tunnel  max intensity: 1×10 16 prot/year  10 experiments, 1×10 15 prot/exp  foreseen start of operation: 2011  to be adapted to the new LHC schedule and long 09/10 shutdown CERN, May 13th Lucie Linssen, Physics Opportunities Workshop Possible implementation in the TT60/WANF tunnel

GIF++ facility  Source  Cs 137 (662 keV) 10TBq (GIF in West- area: 740GBq)  movable filters, as present source attenuation down to F=10 5  second irradiation facility (pointing upstream)  Secondary beam – H4 line  muon beam 100GeV/c, ~10 4  /spill, 10x10cm 2  electron beam  Shielding  Cs 137 : 2 Gy/h at 50 cm for a 10 TBq source  radiation limits for supervised area -> requires 1.6m concrete  Requested start of operation : 2010 CERN, May 13th Lucie Linssen, Physics Opportunities Workshop New GIF++ facility in the SPS North Area – H4 beam line

GIF++ facility CERN, May 13th Lucie Linssen, Physics Opportunities Workshop New GIF++ facility in the SPS North Area – H4 beam line H4

Proton irradiation CERN, May 13th 2009Lucie Linssen, Physics Opportunities Workshop 16  Maintain with minimal investment the PS East Area facility  improved duty time to gain x2 in integrated rate (scheduling?)  upgrade in the beam monitoring systems  upgrade in the mobile trolley and cabling  Plan for a high-intensity proton irradiation facility coupled to the future PS2  PS2 facility at 20 GeV is preferred 20 GeV is already conveniently used at the PS allows placing several samples in the beam at the same time  Flux: 1.1  protons/pulse (16.8 s interval)  Fluence: 2x10 16 p/cm 2 over ~5 cm 2 to be reached in two weeks  Future PS2 proton and mixed field irradiations could co-exist Proposal

Proton irradiation CERN, May 13th Lucie Linssen, Physics Opportunities Workshop Current facility and proposed solution for the future Current PS east hall facility Requested future PS2 facility 20 GeV >10 12 protons per spill

CERF++ mixed field irradiation facility  Transport an attenuated proton beam in the H4 beam line up to the entrance of EHN1 hall  Feature last used for NA31 in 1986  Beam intensity : <1×10 11 p/spill  measurement locations around the thick target CERN, May 13th Lucie Linssen, Physics Opportunities Workshop Possible CERF++ implementation in the H4 beam line  FLUKA Simulation  GeV/c  Contour = 15  Sv/h Implementation studies for this facility are just starting Requested start of operation : 2010

Summary of required facilities CERN, May 13th 2009Lucie Linssen, Physics Opportunities Workshop 19 The WG investigated the possibilities to combine needs and minimize the proposed facilities. Diverse requirements make several facilities necessary:  Proton and ion irradiations at high energy and high density (fast extraction)  HiRadMat at WANF (implementation plans)  Gamma irradiations in the presence of a muon beam  GIF++ at SPS north area H4 (implementation plans)  Proton irradiations at high intensity (slow extraction)  Continuation of PS east hall facility with minor upgrading  Future PS2 proton irradiation facility  Mixed field irradiations, slow extraction  CERF++, SPS location currently under study

Summary CERN, May 13th 2009Lucie Linssen, Physics Opportunities Workshop 20  The WG was a good opportunity to bring together experts from various departments to promote collaboration and common solutions  A complete survey of the needs of the whole community for irradiation facilities was made. A summary report is under preparation  Short and long term needs identified, supporting the request for improved facilities in view of the current LHC (machine and detectors) and the upgrades  Next steps: advance from the feasibility studies to implementation and technical designs for all 4 facilities  Survey shows that facilities (GIF++, CERF++, HiRadMat) are needed “as soon as possible” (by 2010/2011)

Spare slides CERN, May 13th Lucie Linssen, Physics Opportunities Workshop

 PS  Proton irradiation facility in the East Area  SPS  GIF - Gamma Irradiation Facility in the West Area  CERF - CERN Reference Facility in the North Area  (parasitic) irradiation of electronics in CNGS … and ad-hoc tests – now decommissioned  (parasitic) irradiation of electronics in the SPS/TCC2 target area  material test (collimators, targets) in TT40 line  (parasitic) irradiation of materials or “target units” in ISOLDE Present Irradiation Facilities CERN, May 13th Lucie Linssen, Physics Opportunities Workshop Summary of current/past facilities with their assets and shortfalls

Proton irradiation in the PS East Area CERN, May 13th 2009Lucie Linssen, Physics Opportunities Workshop 23 Layout

Proton irradiation in the PS East Area CERN, May 13th 2009Lucie Linssen, Physics Opportunities Workshop 24  Protons and mixed field irradiations  Intensities  max protons/extraction (slow or fast-slow extraction)  up to protons/(cm 2 hr) on a 2×2 cm 2 surface  up to neutrons/(cm 2 hr) on a 30×30 cm 2 surface (1 MeV equiv.)  In operation since 1992  up to 1500 irradiated samples per year  mainly used by detector communities: trackers, electronics  Drawback:   parasitic operation to DIRAC, access via primary beam area, personnel exposure, limited space, limited rate Characteristics

CERN Reference Facility – SPS NA CERN, May 13th Lucie Linssen, Physics Opportunities Workshop H6 beam in the SPS North Area EHN1 experimental hall Hadron beam Concrete shielding Detectors Copper target 1 m H6 beam reference locations

CERN Reference Facility – SPS NA CERN, May 13th 2009Lucie Linssen, Physics Opportunities Workshop 26  SPS H6 secondary beam, 120 GeV/c hadrons  56% protons, 39% pions + 5% Kaons  well defined and simulated mixed radiation fields  Intensities  max 10 8 protons/pulse (5s) (slow extraction)  In operation since 1992, 1-2 weeks/year  mainly used for test/calibration of passive and active detectors for dosimetry or radiation monitoring  ~20 teams/week, internal and external users  FLUKA benchmarking, beam loss monitor studies  Drawback:   limited dose rates, muon background from TCC2 (reduced since 2006) Characteristics

Gamma Irradiation Facility – West Area CERN, May 13th Lucie Linssen, Physics Opportunities Workshop Area layout The Cs 137 source container The external screens and collimators

Gamma Irradiation Facility – West Area CERN, May 13th 2009Lucie Linssen, Physics Opportunities Workshop 28  740 GBq Cs 137 source, irradiation over large surfaces  Combined with (muon) beam from X5 line  In operation since 1997  all year (source), some weeks (beam)  mainly used for tests of muon detectors for LHC experiments ageing tests, performance under “background” conditions (photons from the source)  Drawback:   more intensity would be desirable (accelerated ageing), combined with higher muon beam energy  space issue in bat.190  space needed for LHC magnet lab Characteristics

Irradiation of electronics – SPS/TCC2 CERN, May 13th Lucie Linssen, Physics Opportunities Workshop Parasitic mixed field irradiations – layout  Mixed field irradiation, high doses within reasonable time  Clients: LHC accelerator groups, testing components and electronics  up to 25 experiments/year  sufficient space to test complete systems  Drawback:   Parasitic ad-hoc test  no reproducible radiation conditions  high residual dose rate in the area (access, safety) T6 target

Pulsed proton irradiation – TT40 line  Used for LHC collimator studies and material tests in 2004 and 2006  Short pulses at 450 GeV/c  up to 3.3  ppp (approx. 2 MJ)  Drawback:   limited space  interference with CNGS operation and LHC fill  area not ideal in terms RP aspects  production of radioactivity close to beam line elements  access conditions CERN, May 13th Lucie Linssen, Physics Opportunities Workshop Intense proton beam irradiation - layout Collimator under test

CNRAD electronics irradiation - CNGS CERN, May 13th Lucie Linssen, Physics Opportunities Workshop Parasitic mixed field irradiations CNGS service gallery - layout High energy (>10MeV) neutron flux – FLUKA sim. Total dose (Gy/y) – FLUKA sim. Test stations in the service gallery

CNRAD electronics irradiation - CNGS CERN, May 13th 2009Lucie Linssen, Physics Opportunities Workshop 32  Exposure to mixed high-energy radiation fields, well-known field thanks to extensive FLUKA simulations  Mainly focused for SEE on installed LHC electronics  four stations fully equipped for remote control and readout of components  possible to test complete systems (crates)  Dose rates : o CNGS : 1 to 150 Gy per week o LHC ARC-DS : 1 to 200 Gy per year  Drawback:  Parasitic to CNGS, access conditions, long access tunnel, safety Characteristics