Progress Report from Material Radiation Testing at NCSR Demokritos 28 February 20111Nick Gazis, CERN-BE/RF & NTU-Athens Input from: G. Riddone, A. Samoshkin, I. Stamatelatos, S. Harisopoulos, R. Vlastou and other colleagues

28 February 20112Nick Gazis, CERN-BE/RF & NTU-Athens Index  Testing Schedule & Radiation Background Input  Tandem Accelerator  Samples & Irradiation Testing  Summary & Future Tasks

Phase 1 material testing final report (March 2011) : Information on induced activity, gamma dose rate, heat decay with post irradiation time etc (i.e. Neutron spectrum as a function of depth within the sample). Phase 1 28 February CLIC Supporting System Material Testing Phase 2 ISO Specimen Fabrication Specimen Material SiC SiC glued (epoxy glue) Epument 145/B Specimen Dimension 10 mm * 10 mm 20 mm * 20 mm 40 mm * 40 mm Tandem Accelerator IrradiationUp to 50 MeV Neutron Source Radio activation investigation (microelements, traces or other) Phase 3 Mechanical testing (fatigue, fracture) of reference & irradiated ISO specimen Nick Gazis, CERN-BE/RF & NTU-Athens

28 February 20114Nick Gazis, CERN-BE/RF & NTU-Athens Radiation Background  18 Gy for losses at 9 GeV  1.6 M Gy for losses 1500 GeV  18 Gy for losses at 9 GeV  1.6 M Gy for losses 1500 GeV Input from S. Mallows

28 February 20115Nick Gazis, CERN-BE/RF & NTU-Athens Tandem Accelerator Tandem Accelerator Laboratory entrance  Tandem accelerator facts and figures: i.Range of 3.9 – 11.5 MeV for monoenergetic neutron beam acceleration (deuteron-induced reaction [D-D] ); ii.Several applications in basic research (neutron atomic physics, nuclear astrophysics, material analyses, biomedicine etc); iii – hours/year  60 % for users; iv.Currently 2 halls and 5 beam lines (positioned at 25°, 60°(x2), 32.5°, 45° with respect to the beam direction) existing, future 3 additional beam lines to be installed (positioned at 0°, 15°, 45° with respect to the beam direction); v.Neutron flux 10 6 n sec -1 cm -2.

Acceler ated Ions (positiv e due to Strippin g) Angle of 30° Accelerate d Ions (positive & damped) Analyse r 28 February 20116Nick Gazis, CERN-BE/RF & NTU-Athens Tandem Accelerator Heavy Hydroge n (deuteriu m) ions [Vacuum: 1.3x10 -6 ] [17 keV] Duopla smatro n off axis 60 keV Pre- acceler ating Tube Angle of 30° Gridde d box lens Ions (negative) Inflecto r Generator [Van De Graaf] Material Samples Control Room Concrete – Boron Shielding Wall Neutrons ≤ 11 MeV Magnet for Ion selection Magnet for Energy selection Magnet for Experimental Line selection ModulationsControlsMeasurements

28 February 20117Nick Gazis, CERN-BE/RF & NTU-Athens Tandem Accelerator – Experimental Area Tandem Accelerator “Red Hall” Target Area: Position for specimen testing assembly

28 February 20118Nick Gazis, CERN-BE/RF & NTU-Athens Case Study – Material Samples & Assembly Samples Preparation: I.SiC (Boostec) II.SiC (Micro-Controle) III.Glued SiC (Boostec) IV.Glued SiC (Micro-Controle) V.Epument 145/B VI.O-rings Swagelok VII.[Multiple Foils (with Co cases)] Samples Preparation: I.SiC (Boostec) II.SiC (Micro-Controle) III.Glued SiC (Boostec) IV.Glued SiC (Micro-Controle) V.Epument 145/B VI.O-rings Swagelok VII.[Multiple Foils (with Co cases)] Support Configurations for the specimen assembly

28 February 20119Nick Gazis, CERN-BE/RF & NTU-Athens Case Study – Material Samples & Assembly Assembly configuration at the neutron beam target area Multiple Foil technique for the characterization of the neutron beam

28 February Nick Gazis, CERN-BE/RF & NTU-Athens Case Study – Material Samples & Assembly 40 – 60 μSV/h near the target area  assembly time ≤ 10 min 40 – 60 μSV/h near the target area  assembly time ≤ 10 min Plexiglas sandwiched specimen  Heat decay Plexiglas sandwiched specimen  Heat decay

28 February Nick Gazis, CERN-BE/RF & NTU-Athens Case Study – HPG Detector Measurements High Purity Germanium Detector used for the measurement of the possible radio-activation of the specimen and the characterization of the neutron beam by the multiple foil characterization technique

28 February Nick Gazis, CERN-BE/RF & NTU-Athens Irradiations & Measurements Sessions Specimen Descriptio n Number of Irradiated Specimen Number of Reference Specimen Configuration of irradiation Neutron Beam Energy Time of Irradiation Distance from the target Nightshift session (~8 hours at 4.78 MeV) Multiple Foils 1 set (9 foils) 2 sets (9 foils each) Bare4.78 Mev3 hours I.5 cm II.7.5 cm – SiC (Boostec) 3  1 reference  1 spare  Bare  Plexiglas sandwich I.4.78 MeV II.10.9 MeV 3 hours (each session) 8 cm– SiC (Micro- Controle) 3  1 reference  1 spare  Bare  Plexiglas sandwich I.4.78 MeV II.10.9 MeV 3 hours (each session) 7.5 cm– Glued SiC (Boostec & 3M) 3  1 reference  1 spare  Bare  Plexiglas sandwich I.4.78 MeV II.10.9 MeV 3 hours (each session) 10 cm Glued SiC (Micro- Controle & Locktite) 3  1 reference  1 spare  Bare  Plexiglas sandwich I.4.78 MeV II.10.9 MeV 3 hours (each session) 10 cm– Epument 145/B 3  1 reference  1 spare  Bare  Plexiglas sandwich I.4.78 MeV II.10.9 MeV 3 hours (each session) 7.5 cm Swagelok O-ring 3  1 reference  1 spare  Bare  Plexiglas sandwich I.4.78 MeV II.10.9 MeV 3 hours (each session) 7.5 cm

Summary of Accomplished Tasks: Material samples support and experimental assembly; Activation properties testing (Tandem accelerator, phase 1); Material composition testing (XRF, phase 1); HPG detector data input (phase 1). Summary & Future Steps 28 February Nick Gazis, CERN-BE/RF & NTU-Athens Comments are always welcome! Future Tasks: Data processing (fluka, fishpact), results evaluation (phase 1); Microscopy surfasic inspection (phase 1); Choice of experimental procedure & schedule for phase 2; Fabrication & testing (radiation) of ISO specimen (phase 2); Testing (mechanical, hardness) of ISO specimen (phase 3). Many thanks to the NSCR Demokritos Radiation Protection Group, Tandem Accelerator Laboratory & Nuclear Reactor Laboratory for their valuable help and collaboration for this project.

Thank you! 14Nick Gazis, CERN-BE/RF & NTU-Athens28 February Nick Gazis, CERN-BE/RF & NTU-Athens

28 February Nick Gazis, CERN-BE/RF & NTU-Athens Supple mentary Slide Tandem Accelerator

Multiple Foil Technique Configuration 28 February Nick Gazis, CERN-BE/RF & NTU-Athens NiZnMn CoInTi AlFeCu  Monoenergetic neutron beam  Limited energy spread (amplitude) E 0 ± ΔΕ, ΔΕ ≤ 0.1 * E 0  Multienergetic neutron beam (white energy spectrum)  Wide energy spread that can activate a big variety of different materials Supple mentary Slide

28 February Nick Gazis, CERN-BE/RF & NTU-Athens Supple mentary Slide 40 – 60 μSV/h for the assembly near the target area  assembly time ≤ 10 min 40 – 60 μSV/h for the assembly near the target area  assembly time ≤ 10 min Tandem Accelerator