PANDA – EMC Meeting Bochum, March 1, 2016 Status on PWO development R. W. Novotny, V. Dormenev Justus-Liebig-Universität, II. Physikalisches Institut, Giessen, Germany • SICCAS • Status on CRYTUR development • Timelines and financing
• SICCAS: obviously no interest anymore • ongoing activities: contract from Uppsala for pre-production ~ 90 crystals • parallel activities at Jlab, BNL and Orsay: NPS • JRA as part of HP-HORIZON2020 • spokesperson: Carlos Munioz Contribution by CZ-FAIR •
• optical longitudinal transmission BTCP
• optical longitudinal transmission BTCP • light yield @ 18 o C
• radiation hardness BTCP tested using γ -rays: ~ 1.2 MeV 60 Co integral dose: 30Gy T 1 ∆ = ⋅ bef k ln acceptance limit: ∆ k < 1.1 m -1 T d after
• restart of PWO production in summer 2014 • production based on Czochralski technology • use of existing pre-mixture of raw material ( NeoChem , Moscow) • network: close collaboration with RINP Minsk and IPAS Prague • additional installations already started including device for geometry controle • optimization of ovens and N 2 -flushing
first full size ingots: grown in Ar atmosphere and doped with La+Y dimension: 20x20x200mm 3
first full size ingots: grown in Ar atmosphere and doped with La+Y dimension: 20x20x200mm 3 1,4 1,2 dk 5 Gy 1,0 dk, m -1 dk 10 Gy dk 20 Gy 0,8 dk 30 Gy dk 50 Gy 0,6 dk 70 Gy dk 100 Gy 0,4 dk 150 Gy dk 200 Gy 0,2 0,0 300 400 500 600 700 800 900 wavelength, nm
last sample:20x20x169 mm 3 Longitudinal Transmittance of CRYTUR #21 (169 mm) PWO 80 70 60 Before irr. Explanation of LY reduction(?) Transmittanse, % 50 Irr 30 Gy 40 BTCP 1913 ECR 30 20 10 0 300 400 500 600 700 800 900 wavelength, nm
last sample:20x20x169 mm 3 Longitudinal Transmittance of CRYTUR #21 (169 mm) PWO 80 70 60 Before irr. Explanation of LY reduction(?) Transmittanse, % 50 Irr 30 Gy Light Yield vs timegate 40 60 BTCP 1913 ECR 30 50 20 40 10 BOTTOM on PMT, T= +18 C BOTTOM on PMT, T= -25 C LY, phe/MeV 0 Top on PMT, T= +18 C 30 300 400 500 600 700 800 900 Top on PMT, T= -25 C wavelength, nm 20 LY(100 ns)/L(1000 ns) ≈ 0.9 for all series LY(-25 C)/LY(+18 C)= 10 3.04-3.14 for "Bottom on PMT" position 3.10-3.15 for "Top on PMT" position 0 0 500 1000 1500 2000 2500 3000 3500 4000 Time gate, ns
last sample:20x20x169 mm 3 Longitudinal Transmittance of CRYTUR #21 (169 mm) PWO 80 70 60 Before irr. Explanation of LY reduction(?) Transmittanse, % 50 Irr 30 Gy Light Yield vs timegate 40 60 BTCP 1913 ECR 30 50 20 Longitudinal induced absorption coefficient of 40 10 CRYTUR #21 (169 mm) PWO BOTTOM on PMT, T= +18 C 2,0 BOTTOM on PMT, T= -25 C LY, phe/MeV 0 1,8 Top on PMT, T= +18 C 30 300 400 500 600 700 800 900 Top on PMT, T= -25 C wavelength, nm 1,6 20 1,4 LY(100 ns)/L(1000 ns) ≈ 0.9 for all series dk, m -1 1,2 PANDA Specification Limit / dk(420 nm) ≤ 1.1 m -1 LY(-25 C)/LY(+18 C)= 10 1,0 3.04-3.14 for "Bottom on PMT" position 3.10-3.15 for "Top on PMT" position 0,8 0 0 500 1000 1500 2000 2500 3000 3500 4000 0,6 dk 30 Gy Time gate, ns 0,4 0,2 0,0 300 400 500 600 700 800 900 wavelength, nm
last sample:20x20x169 mm 3 Longitudinal Transmittance of CRYTUR #21 (169 mm) PWO 80 70 60 Before irr. Explanation of LY reduction(?) Transmittanse, % 50 Irr 30 Gy Light Yield vs timegate 40 60 BTCP 1913 ECR 30 50 20 Longitudinal induced absorption coefficient of 40 10 CRYTUR #21 (169 mm) PWO BOTTOM on PMT, T= +18 C 2,0 BOTTOM on PMT, T= -25 C LY, phe/MeV 0 1,8 Top on PMT, T= +18 C 30 300 400 500 600 700 800 900 Top on PMT, T= -25 C wavelength, nm 1,6 Transversal radiation induced coefficient of CRYTUR #21 (169 cm) 20 1,4 PWO crystal LY(100 ns)/L(1000 ns) ≈ 0.9 for all series dk, m -1 2,0 1,2 PANDA Specification Limit / dk(420 nm) ≤ 1.1 m -1 Integral dose= 150 Gy LY(-25 C)/LY(+18 C)= 10 1,8 dk 1 cm (Bottom) 1,0 3.04-3.14 for "Bottom on PMT" position dk 3 cm 1,6 3.10-3.15 for "Top on PMT" position dk 5 cm 0,8 0 dk 7 cm 1,4 0 500 1000 1500 2000 2500 3000 3500 4000 0,6 dk 9 cm dk 30 Gy 1,2 dk 10 cm Time gate, ns dk, m -1 0,4 dk 12 cm 1,0 dk 14 cm 0,2 dk 16 cm (Top) 0,8 Longitudinal dose= 30 Gy 0,0 300 400 500 600 700 800 900 0,6 wavelength, nm 0,4 0,2 0,0 300 400 500 600 700 800 900 wavelength, nm
ordered by Orsay: most recent samples # 58, 59, 60 Carlos Munioz (Jlab, NPS) Dimensions: 20 x 20 x 185 mm 3 light yield reduced via overdoping
optical transmission and radiation hardness: 1
optical transmission and radiation hardness: 2
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